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SubjectRe: [PATCH v8 3/3] PM / AVS: SVS: Introduce SVS engine
Hi Roger,

Thank you for your patch. I have the feeling that this driver is
complex and difficult to follow and I am wondering if it wouldn't be
better if you can send a version that simply adds basic functionality
for now. Some comments below.

Missatge de Roger Lu <roger.lu@mediatek.com> del dia dl., 18 de maig
2020 a les 11:25:
>
> The SVS (Smart Voltage Scaling) engine is a piece
> of hardware which is used to calculate optimized
> voltage values of several power domains,
> e.g. CPU/GPU/CCI, according to chip process corner,
> temperatures, and other factors. Then DVFS driver
> could apply those optimized voltage values to reduce
> power consumption.
>
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> ---
> drivers/power/avs/Kconfig | 10 +
> drivers/power/avs/Makefile | 1 +
> drivers/power/avs/mtk_svs.c | 2119 +++++++++++++++++++++++++++++++++
> include/linux/power/mtk_svs.h | 23 +
> 4 files changed, 2153 insertions(+)
> create mode 100644 drivers/power/avs/mtk_svs.c
> create mode 100644 include/linux/power/mtk_svs.h
>
> diff --git a/drivers/power/avs/Kconfig b/drivers/power/avs/Kconfig
> index cdb4237bfd02..67089ac6040e 100644
> --- a/drivers/power/avs/Kconfig
> +++ b/drivers/power/avs/Kconfig
> @@ -35,3 +35,13 @@ config ROCKCHIP_IODOMAIN
> Say y here to enable support io domains on Rockchip SoCs. It is
> necessary for the io domain setting of the SoC to match the
> voltage supplied by the regulators.
> +
> +config MTK_SVS
> + bool "MediaTek Smart Voltage Scaling(SVS)"

Can't be this a module? Why? In such case, you should use tristate option

> + depends on POWER_AVS && MTK_EFUSE && NVMEM
> + help
> + The SVS engine is a piece of hardware which is used to calculate
> + optimized voltage values of several power domains, e.g.
> + CPU clusters/GPU/CCI, according to chip process corner, temperatures,
> + and other factors. Then DVFS driver could apply those optimized voltage
> + values to reduce power consumption.
> diff --git a/drivers/power/avs/Makefile b/drivers/power/avs/Makefile
> index 9007d05853e2..231adf078582 100644
> --- a/drivers/power/avs/Makefile
> +++ b/drivers/power/avs/Makefile
> @@ -2,3 +2,4 @@
> obj-$(CONFIG_POWER_AVS_OMAP) += smartreflex.o
> obj-$(CONFIG_QCOM_CPR) += qcom-cpr.o
> obj-$(CONFIG_ROCKCHIP_IODOMAIN) += rockchip-io-domain.o
> +obj-$(CONFIG_MTK_SVS) += mtk_svs.o

Will this driver be SoC specific or the idea is to support different
SoCs? If the answer to the first question is yes, please name the file
with the SoC prefix (i.e mt8183_svs). However, If the answer to the
second question is yes, make sure you prefix common
functions/structs/defines with a generic prefix mtk_svs but use the
SoC prefix for the ones you expect will be different between SoC, i.e
mt8183_svs_. This helps the readability of the driver. Also, try to
avoid too generic names.

> diff --git a/drivers/power/avs/mtk_svs.c b/drivers/power/avs/mtk_svs.c
> new file mode 100644
> index 000000000000..a4083b3ef175
> --- /dev/null
> +++ b/drivers/power/avs/mtk_svs.c
> @@ -0,0 +1,2119 @@
> +// SPDX-License-Identifier: GPL-2.0

I suspect you want this only GPLv2 compliant. Use GPL-2.0-only

> +/*
> + * Copyright (C) 2020 MediaTek Inc.
> + */
> +
> +#define pr_fmt(fmt) "[mtk_svs] " fmt

I don't see any reason to use pr_fmt in this driver. Use dev_*
functions instead and remove the above.

> +
> +#include <linux/bits.h>
> +#include <linux/clk.h>
> +#include <linux/completion.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/kthread.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/nvmem-consumer.h>
> +#include <linux/of_address.h>
> +#include <linux/of_irq.h>
> +#include <linux/of_platform.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_domain.h>
> +#include <linux/pm_opp.h>
> +#include <linux/pm_qos.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/power/mtk_svs.h>
> +#include <linux/proc_fs.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/reset.h>
> +#include <linux/seq_file.h>
> +#include <linux/slab.h>
> +#include <linux/spinlock.h>
> +#include <linux/thermal.h>
> +#include <linux/uaccess.h>
> +
> +/* svs 1-line sw id */
> +#define SVS_CPU_LITTLE BIT(0)
> +#define SVS_CPU_BIG BIT(1)
> +#define SVS_CCI BIT(2)
> +#define SVS_GPU BIT(3)
> +
> +/* svs bank mode support */
> +#define SVSB_MODE_ALL_DISABLE (0)

nit: SVS_BMODE_?

> +#define SVSB_MODE_INIT01 BIT(1)
> +#define SVSB_MODE_INIT02 BIT(2)
> +#define SVSB_MODE_MON BIT(3)
> +
> +/* svs bank init01 condition */
> +#define SVSB_INIT01_VOLT_IGNORE BIT(1)
> +#define SVSB_INIT01_VOLT_INC_ONLY BIT(2)
> +
> +/* svs bank common setting */
> +#define HIGH_TEMP_MAX (U32_MAX)

nit: SVS_*

> +#define RUNCONFIG_DEFAULT (0x80000000)

Btw, there is any public datasheet where I can see those addresses and
registers and bit fields?

> +#define DC_SIGNED_BIT (0x8000)
> +#define INTEN_INIT0x (0x00005f01)
> +#define INTEN_MONVOPEN (0x00ff0000)
> +#define SVSEN_OFF (0x0)
> +#define SVSEN_MASK (0x7)
> +#define SVSEN_INIT01 (0x1)
> +#define SVSEN_INIT02 (0x5)
> +#define SVSEN_MON (0x2)
> +#define INTSTS_MONVOP (0x00ff0000)
> +#define INTSTS_COMPLETE (0x1)
> +#define INTSTS_CLEAN (0x00ffffff)
> +
> +#define proc_fops_rw(name) \
> + static int name ## _proc_open(struct inode *inode, \
> + struct file *file) \
> + { \
> + return single_open(file, name ## _proc_show, \
> + PDE_DATA(inode)); \
> + } \
> + static const struct proc_ops name ## _proc_fops = { \
> + .proc_open = name ## _proc_open, \
> + .proc_read = seq_read, \
> + .proc_lseek = seq_lseek, \
> + .proc_release = single_release, \
> + .proc_write = name ## _proc_write, \
> + }
> +
> +#define proc_fops_ro(name) \
> + static int name ## _proc_open(struct inode *inode, \
> + struct file *file) \
> + { \
> + return single_open(file, name ## _proc_show, \
> + PDE_DATA(inode)); \
> + } \
> + static const struct proc_ops name ## _proc_fops = { \
> + .proc_open = name ## _proc_open, \
> + .proc_read = seq_read, \
> + .proc_lseek = seq_lseek, \
> + .proc_release = single_release, \
> + }
> +
> +#define proc_entry(name) {__stringify(name), &name ## _proc_fops}
> +

/proc is usually the old way of exporting files to userspace, so
unless you have a really good reason use sysfs instead, or even
better, if it is only for debug purposes use debugfs. Also, you should
document the entries in Documentation.

> +static DEFINE_SPINLOCK(mtk_svs_lock);
> +struct mtk_svs;
> +
> +enum svsb_phase {

nit: mtk_svs_bphase?

> + SVSB_PHASE_INIT01 = 0,

nit: SVS_BPHASE_?

> + SVSB_PHASE_INIT02,
> + SVSB_PHASE_MON,
> + SVSB_PHASE_ERROR,
> +};
> +
> +enum reg_index {

nit: svs_reg_index?

> + TEMPMONCTL0 = 0,
> + TEMPMONCTL1,
> + TEMPMONCTL2,
> + TEMPMONINT,
> + TEMPMONINTSTS,
> + TEMPMONIDET0,
> + TEMPMONIDET1,
> + TEMPMONIDET2,
> + TEMPH2NTHRE,
> + TEMPHTHRE,
> + TEMPCTHRE,
> + TEMPOFFSETH,
> + TEMPOFFSETL,
> + TEMPMSRCTL0,
> + TEMPMSRCTL1,
> + TEMPAHBPOLL,
> + TEMPAHBTO,
> + TEMPADCPNP0,
> + TEMPADCPNP1,
> + TEMPADCPNP2,
> + TEMPADCMUX,
> + TEMPADCEXT,
> + TEMPADCEXT1,
> + TEMPADCEN,
> + TEMPPNPMUXADDR,
> + TEMPADCMUXADDR,
> + TEMPADCEXTADDR,
> + TEMPADCEXT1ADDR,
> + TEMPADCENADDR,
> + TEMPADCVALIDADDR,
> + TEMPADCVOLTADDR,
> + TEMPRDCTRL,
> + TEMPADCVALIDMASK,
> + TEMPADCVOLTAGESHIFT,
> + TEMPADCWRITECTRL,
> + TEMPMSR0,
> + TEMPMSR1,
> + TEMPMSR2,
> + TEMPADCHADDR,
> + TEMPIMMD0,
> + TEMPIMMD1,
> + TEMPIMMD2,
> + TEMPMONIDET3,
> + TEMPADCPNP3,
> + TEMPMSR3,
> + TEMPIMMD3,
> + TEMPPROTCTL,
> + TEMPPROTTA,
> + TEMPPROTTB,
> + TEMPPROTTC,
> + TEMPSPARE0,
> + TEMPSPARE1,
> + TEMPSPARE2,
> + TEMPSPARE3,
> + TEMPMSR0_1,
> + TEMPMSR1_1,
> + TEMPMSR2_1,
> + TEMPMSR3_1,
> + DESCHAR,
> + TEMPCHAR,
> + DETCHAR,
> + AGECHAR,
> + DCCONFIG,
> + AGECONFIG,
> + FREQPCT30,
> + FREQPCT74,
> + LIMITVALS,
> + VBOOT,
> + DETWINDOW,
> + CONFIG,
> + TSCALCS,
> + RUNCONFIG,
> + SVSEN,
> + INIT2VALS,
> + DCVALUES,
> + AGEVALUES,
> + VOP30,
> + VOP74,
> + TEMP,
> + INTSTS,
> + INTSTSRAW,
> + INTEN,
> + CHKINT,
> + CHKSHIFT,
> + STATUS,
> + VDESIGN30,
> + VDESIGN74,
> + DVT30,
> + DVT74,
> + AGECOUNT,
> + SMSTATE0,
> + SMSTATE1,
> + CTL0,
> + DESDETSEC,
> + TEMPAGESEC,
> + CTRLSPARE0,
> + CTRLSPARE1,
> + CTRLSPARE2,
> + CTRLSPARE3,
> + CORESEL,
> + THERMINTST,
> + INTST,
> + THSTAGE0ST,
> + THSTAGE1ST,
> + THSTAGE2ST,
> + THAHBST0,
> + THAHBST1,
> + SPARE0,
> + SPARE1,
> + SPARE2,
> + SPARE3,
> + THSLPEVEB,
> + reg_num,
> +};
> +
> +static const u32 svs_regs_v2[] = {

Is this SoC specific or shared between SoCs?

> + [TEMPMONCTL0] = 0x000,
> + [TEMPMONCTL1] = 0x004,
> + [TEMPMONCTL2] = 0x008,
> + [TEMPMONINT] = 0x00c,
> + [TEMPMONINTSTS] = 0x010,
> + [TEMPMONIDET0] = 0x014,
> + [TEMPMONIDET1] = 0x018,
> + [TEMPMONIDET2] = 0x01c,
> + [TEMPH2NTHRE] = 0x024,
> + [TEMPHTHRE] = 0x028,
> + [TEMPCTHRE] = 0x02c,
> + [TEMPOFFSETH] = 0x030,
> + [TEMPOFFSETL] = 0x034,
> + [TEMPMSRCTL0] = 0x038,
> + [TEMPMSRCTL1] = 0x03c,
> + [TEMPAHBPOLL] = 0x040,
> + [TEMPAHBTO] = 0x044,
> + [TEMPADCPNP0] = 0x048,
> + [TEMPADCPNP1] = 0x04c,
> + [TEMPADCPNP2] = 0x050,
> + [TEMPADCMUX] = 0x054,
> + [TEMPADCEXT] = 0x058,
> + [TEMPADCEXT1] = 0x05c,
> + [TEMPADCEN] = 0x060,
> + [TEMPPNPMUXADDR] = 0x064,
> + [TEMPADCMUXADDR] = 0x068,
> + [TEMPADCEXTADDR] = 0x06c,
> + [TEMPADCEXT1ADDR] = 0x070,
> + [TEMPADCENADDR] = 0x074,
> + [TEMPADCVALIDADDR] = 0x078,
> + [TEMPADCVOLTADDR] = 0x07c,
> + [TEMPRDCTRL] = 0x080,
> + [TEMPADCVALIDMASK] = 0x084,
> + [TEMPADCVOLTAGESHIFT] = 0x088,
> + [TEMPADCWRITECTRL] = 0x08c,
> + [TEMPMSR0] = 0x090,
> + [TEMPMSR1] = 0x094,
> + [TEMPMSR2] = 0x098,
> + [TEMPADCHADDR] = 0x09c,
> + [TEMPIMMD0] = 0x0a0,
> + [TEMPIMMD1] = 0x0a4,
> + [TEMPIMMD2] = 0x0a8,
> + [TEMPMONIDET3] = 0x0b0,
> + [TEMPADCPNP3] = 0x0b4,
> + [TEMPMSR3] = 0x0b8,
> + [TEMPIMMD3] = 0x0bc,
> + [TEMPPROTCTL] = 0x0c0,
> + [TEMPPROTTA] = 0x0c4,
> + [TEMPPROTTB] = 0x0c8,
> + [TEMPPROTTC] = 0x0cc,
> + [TEMPSPARE0] = 0x0f0,
> + [TEMPSPARE1] = 0x0f4,
> + [TEMPSPARE2] = 0x0f8,
> + [TEMPSPARE3] = 0x0fc,
> + [TEMPMSR0_1] = 0x190,
> + [TEMPMSR1_1] = 0x194,
> + [TEMPMSR2_1] = 0x198,
> + [TEMPMSR3_1] = 0x1b8,
> + [DESCHAR] = 0xc00,
> + [TEMPCHAR] = 0xc04,
> + [DETCHAR] = 0xc08,
> + [AGECHAR] = 0xc0c,
> + [DCCONFIG] = 0xc10,
> + [AGECONFIG] = 0xc14,
> + [FREQPCT30] = 0xc18,
> + [FREQPCT74] = 0xc1c,
> + [LIMITVALS] = 0xc20,
> + [VBOOT] = 0xc24,
> + [DETWINDOW] = 0xc28,
> + [CONFIG] = 0xc2c,
> + [TSCALCS] = 0xc30,
> + [RUNCONFIG] = 0xc34,
> + [SVSEN] = 0xc38,
> + [INIT2VALS] = 0xc3c,
> + [DCVALUES] = 0xc40,
> + [AGEVALUES] = 0xc44,
> + [VOP30] = 0xc48,
> + [VOP74] = 0xc4c,
> + [TEMP] = 0xc50,
> + [INTSTS] = 0xc54,
> + [INTSTSRAW] = 0xc58,
> + [INTEN] = 0xc5c,
> + [CHKINT] = 0xc60,
> + [CHKSHIFT] = 0xc64,
> + [STATUS] = 0xc68,
> + [VDESIGN30] = 0xc6c,
> + [VDESIGN74] = 0xc70,
> + [DVT30] = 0xc74,
> + [DVT74] = 0xc78,
> + [AGECOUNT] = 0xc7c,
> + [SMSTATE0] = 0xc80,
> + [SMSTATE1] = 0xc84,
> + [CTL0] = 0xc88,
> + [DESDETSEC] = 0xce0,
> + [TEMPAGESEC] = 0xce4,
> + [CTRLSPARE0] = 0xcf0,
> + [CTRLSPARE1] = 0xcf4,
> + [CTRLSPARE2] = 0xcf8,
> + [CTRLSPARE3] = 0xcfc,
> + [CORESEL] = 0xf00,
> + [THERMINTST] = 0xf04,
> + [INTST] = 0xf08,
> + [THSTAGE0ST] = 0xf0c,
> + [THSTAGE1ST] = 0xf10,
> + [THSTAGE2ST] = 0xf14,
> + [THAHBST0] = 0xf18,
> + [THAHBST1] = 0xf1c,
> + [SPARE0] = 0xf20,
> + [SPARE1] = 0xf24,
> + [SPARE2] = 0xf28,
> + [SPARE3] = 0xf2c,
> + [THSLPEVEB] = 0xf30,
> +};
> +
> +struct thermal_parameter {

In general, not only in this struct, would be good have some
documentation to have a better undestanding of the fields. That makes
the job of the reviewer a bit easier.

> + int adc_ge_t;
> + int adc_oe_t;
> + int ge;
> + int oe;
> + int gain;
> + int o_vtsabb;
> + int o_vtsmcu1;
> + int o_vtsmcu2;
> + int o_vtsmcu3;
> + int o_vtsmcu4;
> + int o_vtsmcu5;
> + int degc_cali;
> + int adc_cali_en_t;
> + int o_slope;
> + int o_slope_sign;
> + int ts_id;
> +};
> +
> +struct svs_bank_ops {
> + void (*set_freqs_pct)(struct mtk_svs *svs);
> + void (*get_vops)(struct mtk_svs *svs);
> +};
> +
> +struct svs_bank {
> + struct svs_bank_ops *ops;
> + struct completion init_completion;
> + struct device *dev;
> + struct regulator *buck;
> + struct mutex lock; /* Lock to protect update voltage process */
> + bool suspended;
> + bool mtcmos_request;
> + s32 volt_offset;
> + u32 mode_support;
> + u32 opp_freqs[16];
> + u32 freqs_pct[16];
> + u32 opp_volts[16];
> + u32 init02_volts[16];
> + u32 volts[16];
> + u32 reg_data[3][reg_num];
> + u32 freq_base;
> + u32 vboot;
> + u32 volt_step;
> + u32 volt_base;
> + u32 init01_volt_flag;
> + u32 phase;
> + u32 vmax;
> + u32 vmin;
> + u32 bts;
> + u32 mts;
> + u32 bdes;
> + u32 mdes;
> + u32 mtdes;
> + u32 dcbdet;
> + u32 dcmdet;
> + u32 dthi;
> + u32 dtlo;
> + u32 det_window;
> + u32 det_max;
> + u32 age_config;
> + u32 age_voffset_in;
> + u32 agem;
> + u32 dc_config;
> + u32 dc_voffset_in;
> + u32 dvt_fixed;
> + u32 vco;
> + u32 chk_shift;
> + u32 svs_temp;
> + u32 upper_temp_bound;
> + u32 lower_temp_bound;
> + u32 high_temp_threashold;
> + u32 high_temp_offset;
> + u32 low_temp_threashold;
> + u32 low_temp_offset;
> + u32 core_sel;
> + u32 opp_count;
> + u32 int_st;
> + u32 systemclk_en;
> + u32 sw_id;
> + u32 bank_id;
> + u32 ctl0;
> + u8 *of_compatible;
> + u8 *name;
> + u8 *tzone_name;
> + u8 *buck_name;
> +};
> +
> +struct svs_platform {
> + struct svs_bank *banks;
> + bool (*efuse_parsing)(struct mtk_svs *svs);
> + bool fake_efuse;
> + bool need_hw_reset;
> + const u32 *regs;
> + unsigned long irqflags;
> + u32 bank_num;
> + u32 efuse_num;
> + u32 efuse_check;
> + u32 thermal_efuse_num;
> + u8 *name;
> +};
> +
> +struct mtk_svs {
> + const struct svs_platform *platform;
> + struct svs_bank *bank;
> + struct device *dev;
> + void __iomem *base;
> + struct clk *main_clk;
> + u32 *efuse;
> + u32 *thermal_efuse;
> +};
> +
> +unsigned long claim_mtk_svs_lock(void)
> + __acquires(&mtk_svs_lock)
> +{
> + unsigned long flags;
> +
> + spin_lock_irqsave(&mtk_svs_lock, flags);
> +
> + return flags;
> +}
> +EXPORT_SYMBOL_GPL(claim_mtk_svs_lock);

Is this used for an external module? AFAICS no, so no need to export
and you can replace directly the callers of this with the
spin_lock_irqsave directly. If you plan to use this in the future for
other modules, export when is really needed to be exported.

> +
> +void release_mtk_svs_lock(unsigned long flags)
> + __releases(&mtk_svs_lock)
> +{
> + spin_unlock_irqrestore(&mtk_svs_lock, flags);
> +}
> +EXPORT_SYMBOL_GPL(release_mtk_svs_lock);
> +

ditto

> +static u32 percent(u32 numerator, u32 denominator)
> +{
> + u32 pct;
> +
> + /* If not divide 1000, "numerator * 100" would be data overflow. */
> + numerator /= 1000;
> + denominator /= 1000;
> + pct = ((numerator * 100) + denominator - 1) / denominator;
> + pct &= GENMASK(7, 0);
> +
> + return pct;
> +}
> +
> +static u32 svs_readl(struct mtk_svs *svs, enum reg_index rg_i)
> +{
> + return readl(svs->base + svs->platform->regs[rg_i]);
> +}
> +
> +static void svs_writel(struct mtk_svs *svs, u32 val, enum reg_index rg_i)
> +{
> + writel(val, svs->base + svs->platform->regs[rg_i]);
> +}
> +
> +static void svs_switch_bank(struct mtk_svs *svs)
> +{
> + struct svs_bank *svsb = svs->bank;
> +
> + svs_writel(svs, svsb->core_sel, CORESEL);
> +}
> +
> +static u32 svsb_volt_to_opp_volt(u32 svsb_volt, u32 svsb_volt_step,
> + u32 svsb_volt_base)
> +{
> + u32 u_volt;
> +
> + u_volt = (svsb_volt * svsb_volt_step) + svsb_volt_base;
> +
> + return u_volt;
> +}
> +
> +static int svsb_get_zone_temperature(struct svs_bank *svsb, int *tzone_temp)
> +{
> + struct thermal_zone_device *tzd;
> +
> + tzd = thermal_zone_get_zone_by_name(svsb->tzone_name);
> + if (IS_ERR(tzd))
> + return PTR_ERR(tzd);
> +
> + return thermal_zone_get_temp(tzd, tzone_temp);
> +}
> +
> +static int svsb_set_volts(struct svs_bank *svsb, bool force_update)
> +{
> + u32 i, svsb_volt, opp_volt, temp_offset = 0;
> + int tzone_temp, ret;
> +
> + mutex_lock(&svsb->lock);
> +
> + /*
> + * If bank is suspended, it means signed-off voltages are applied.
> + * Don't need to update opp voltage anymore.
> + */
> + if (svsb->suspended && !force_update) {
> + pr_notice("%s: bank is suspended\n", svsb->name);

Replace all pr_* for dev_* and Its better to be quiet, this messages
looks to me for a dev_dbg candidate, not a notice.

> + mutex_unlock(&svsb->lock);
> + return -EPERM;
> + }
> +
> + /* Get thermal effect */
> + if (svsb->phase == SVSB_PHASE_MON) {
> + if (svsb->svs_temp > svsb->upper_temp_bound &&
> + svsb->svs_temp < svsb->lower_temp_bound) {
> + pr_err("%s: svs_temp is abnormal (0x%x)?\n",
> + svsb->name, svsb->svs_temp);

dev_err and I am not sure if the error level is appropriate here

> + mutex_unlock(&svsb->lock);
> + return -EINVAL;
> + }
> +
> + ret = svsb_get_zone_temperature(svsb, &tzone_temp);
> + if (ret) {
> + pr_err("%s: cannot get zone \"%s\" temperature(%d)\n",
> + svsb->name, svsb->tzone_name, ret);
> + pr_err("%s: set signed-off voltage this time.\n",
> + svsb->name);
> + svsb->phase = SVSB_PHASE_ERROR;
> + }
> +
> + if (tzone_temp >= svsb->high_temp_threashold)
> + temp_offset += svsb->high_temp_offset;
> +
> + if (tzone_temp <= svsb->low_temp_threashold)
> + temp_offset += svsb->low_temp_offset;
> + }
> +
> + /* vmin <= svsb_volt (opp_volt) <= signed-off voltage */
> + for (i = 0; i < svsb->opp_count; i++) {
> + if (svsb->phase == SVSB_PHASE_MON) {
> + svsb_volt = max((svsb->volts[i] + svsb->volt_offset +
> + temp_offset), svsb->vmin);
> + opp_volt = svsb_volt_to_opp_volt(svsb_volt,
> + svsb->volt_step,
> + svsb->volt_base);
> + } else if (svsb->phase == SVSB_PHASE_INIT02) {
> + svsb_volt = max((svsb->init02_volts[i] +
> + svsb->volt_offset), svsb->vmin);
> + opp_volt = svsb_volt_to_opp_volt(svsb_volt,
> + svsb->volt_step,
> + svsb->volt_base);
> + } else if (svsb->phase == SVSB_PHASE_ERROR) {
> + opp_volt = svsb->opp_volts[i];
> + } else {
> + pr_err("%s: unknown phase: %u?\n",
> + svsb->name, svsb->phase);

I think that using a goto here and some places below will help the readability.
ret = -EINVAL;
goto unlock_mutex
[...]
unlock_mutex:
mutex_unlock(&svsb->lock);
return ret;

> + mutex_unlock(&svsb->lock);
> + return -EINVAL;
> + }
> +
> + opp_volt = min(opp_volt, svsb->opp_volts[i]);
> + ret = dev_pm_opp_adjust_voltage(svsb->dev, svsb->opp_freqs[i],
> + opp_volt, opp_volt,
> + svsb->opp_volts[i]);
> + if (ret) {
> + pr_err("%s: set voltage failed: %d\n", svsb->name, ret);
> + mutex_unlock(&svsb->lock);
> + return ret;
> + }
> + }
> +
> + mutex_unlock(&svsb->lock);
> +
> + return 0;
> +}
> +
> +static u32 interpolate(u32 f0, u32 f1, u32 v0, u32 v1, u32 fx)
> +{
> + u32 vy;
> +
> + if (v0 == v1 || f0 == f1)
> + return v0;
> +
> + /* *100 to have decimal fraction factor, +99 for rounding up. */
> + vy = (v0 * 100) - ((((v0 - v1) * 100) / (f0 - f1)) * (f0 - fx));
> + vy = (vy + 99) / 100;
> +
> + return vy;
> +}
> +
> +static void svs_get_vops_v2(struct mtk_svs *svs)
> +{
> + struct svs_bank *svsb = svs->bank;
> + u32 temp, i;
> +
> + temp = svs_readl(svs, VOP30);
> + svsb->volts[6] = (temp >> 24) & GENMASK(7, 0);
> + svsb->volts[4] = (temp >> 16) & GENMASK(7, 0);
> + svsb->volts[2] = (temp >> 8) & GENMASK(7, 0);
> + svsb->volts[0] = (temp & GENMASK(7, 0));
> +
> + temp = svs_readl(svs, VOP74);
> + svsb->volts[14] = (temp >> 24) & GENMASK(7, 0);
> + svsb->volts[12] = (temp >> 16) & GENMASK(7, 0);
> + svsb->volts[10] = (temp >> 8) & GENMASK(7, 0);
> + svsb->volts[8] = (temp & GENMASK(7, 0));
> +
> + for (i = 0; i <= 7; i++) {
> + if (i < 7) {
> + svsb->volts[(i * 2) + 1] =
> + interpolate(svsb->freqs_pct[i * 2],
> + svsb->freqs_pct[(i + 1) * 2],
> + svsb->volts[i * 2],
> + svsb->volts[(i + 1) * 2],
> + svsb->freqs_pct[(i * 2) + 1]);
> + } else if (i == 7) {
> + svsb->volts[(i * 2) + 1] =
> + interpolate(svsb->freqs_pct[(i - 1) * 2],
> + svsb->freqs_pct[i * 2],
> + svsb->volts[(i - 1) * 2],
> + svsb->volts[i * 2],
> + svsb->freqs_pct[(i * 2) + 1]);
> + }
> + }
> +}
> +
> +static void svs_set_freqs_pct_v2(struct mtk_svs *svs)
> +{
> + struct svs_bank *svsb = svs->bank;
> +
> + svs_writel(svs,
> + ((svsb->freqs_pct[6] << 24) & GENMASK(31, 24)) |
> + ((svsb->freqs_pct[4] << 16) & GENMASK(23, 16)) |
> + ((svsb->freqs_pct[2] << 8) & GENMASK(15, 8)) |
> + (svsb->freqs_pct[0] & GENMASK(7, 0)),
> + FREQPCT30);
> + svs_writel(svs,
> + ((svsb->freqs_pct[14] << 24) & GENMASK(31, 24)) |
> + ((svsb->freqs_pct[12] << 16) & GENMASK(23, 16)) |
> + ((svsb->freqs_pct[10] << 8) & GENMASK(15, 8)) |
> + ((svsb->freqs_pct[8]) & GENMASK(7, 0)),
> + FREQPCT74);
> +}
> +
> +static void svs_set_phase(struct mtk_svs *svs, u32 target_phase)
> +{
> + struct svs_bank *svsb = svs->bank;
> + u32 des_char, temp_char, det_char, limit_vals;
> + u32 init2vals, ts_calcs, val, filter, i;
> +
> + svs_switch_bank(svs);
> +
> + des_char = ((svsb->bdes << 8) & GENMASK(15, 8)) |
> + (svsb->mdes & GENMASK(7, 0));
> + svs_writel(svs, des_char, DESCHAR);
> +
> + temp_char = ((svsb->vco << 16) & GENMASK(23, 16)) |
> + ((svsb->mtdes << 8) & GENMASK(15, 8)) |
> + (svsb->dvt_fixed & GENMASK(7, 0));
> + svs_writel(svs, temp_char, TEMPCHAR);
> +
> + det_char = ((svsb->dcbdet << 8) & GENMASK(15, 8)) |
> + (svsb->dcmdet & GENMASK(7, 0));
> + svs_writel(svs, det_char, DETCHAR);
> +
> + svs_writel(svs, svsb->dc_config, DCCONFIG);
> + svs_writel(svs, svsb->age_config, AGECONFIG);
> +
> + if (!svsb->agem) {
> + svs_writel(svs, RUNCONFIG_DEFAULT, RUNCONFIG);
> + } else {
> + val = 0x0;
> +
> + for (i = 0; i < 24; i += 2) {
> + filter = 0x3 << i;
> +
> + if (!(svsb->age_config & filter))
> + val |= (0x1 << i);
> + else
> + val |= (svsb->age_config & filter);
> + }
> + svs_writel(svs, val, RUNCONFIG);
> + }
> +
> + svsb->ops->set_freqs_pct(svs);
> +
> + limit_vals = ((svsb->vmax << 24) & GENMASK(31, 24)) |
> + ((svsb->vmin << 16) & GENMASK(23, 16)) |
> + ((svsb->dthi << 8) & GENMASK(15, 8)) |
> + (svsb->dtlo & GENMASK(7, 0));
> + svs_writel(svs, limit_vals, LIMITVALS);
> + svs_writel(svs, (svsb->vboot & GENMASK(7, 0)), VBOOT);
> + svs_writel(svs, (svsb->det_window & GENMASK(15, 0)), DETWINDOW);
> + svs_writel(svs, (svsb->det_max & GENMASK(15, 0)), CONFIG);
> +
> + if (svsb->chk_shift)
> + svs_writel(svs, (svsb->chk_shift & GENMASK(7, 0)), CHKSHIFT);
> +
> + if (svsb->ctl0)
> + svs_writel(svs, svsb->ctl0, CTL0);
> +
> + svs_writel(svs, INTSTS_CLEAN, INTSTS);
> +
> + switch (target_phase) {
> + case SVSB_PHASE_INIT01:
> + svs_writel(svs, INTEN_INIT0x, INTEN);
> + svs_writel(svs, SVSEN_INIT01, SVSEN);
> + break;
> + case SVSB_PHASE_INIT02:
> + svs_writel(svs, INTEN_INIT0x, INTEN);
> + init2vals = ((svsb->age_voffset_in << 16) & GENMASK(31, 16)) |
> + (svsb->dc_voffset_in & GENMASK(15, 0));
> + svs_writel(svs, init2vals, INIT2VALS);
> + svs_writel(svs, SVSEN_INIT02, SVSEN);
> + break;
> + case SVSB_PHASE_MON:
> + ts_calcs = ((svsb->bts << 12) & GENMASK(23, 12)) |
> + (svsb->mts & GENMASK(11, 0));
> + svs_writel(svs, ts_calcs, TSCALCS);
> + svs_writel(svs, INTEN_MONVOPEN, INTEN);
> + svs_writel(svs, SVSEN_MON, SVSEN);
> + break;
> + default:
> + WARN_ON(1);
> + break;
> + }
> +}
> +
> +static inline void svs_init01_isr_handler(struct mtk_svs *svs)
> +{
> + struct svs_bank *svsb = svs->bank;
> + enum reg_index rg_i;
> +
> + pr_notice("%s: %s: VDN74:0x%08x, VDN30:0x%08x, DCVALUES:0x%08x\n",
> + svsb->name, __func__, svs_readl(svs, VDESIGN74),
> + svs_readl(svs, VDESIGN30), svs_readl(svs, DCVALUES));
> +
> + for (rg_i = TEMPMONCTL0; rg_i < reg_num; rg_i++)
> + svsb->reg_data[SVSB_PHASE_INIT01][rg_i] = svs_readl(svs, rg_i);
> +
> + svsb->phase = SVSB_PHASE_INIT01;
> + svsb->dc_voffset_in = ~(svs_readl(svs, DCVALUES) & GENMASK(15, 0)) + 1;
> + if (svsb->init01_volt_flag == SVSB_INIT01_VOLT_IGNORE)
> + svsb->dc_voffset_in = 0;
> + else if ((svsb->dc_voffset_in & DC_SIGNED_BIT) &&
> + (svsb->init01_volt_flag == SVSB_INIT01_VOLT_INC_ONLY))
> + svsb->dc_voffset_in = 0;
> +
> + svsb->age_voffset_in = svs_readl(svs, AGEVALUES) & GENMASK(15, 0);
> +
> + svs_writel(svs, SVSEN_OFF, SVSEN);
> + svs_writel(svs, INTSTS_COMPLETE, INTSTS);
> +
> + /* svs init01 clock gating */
> + svsb->core_sel &= ~svsb->systemclk_en;
> + complete(&svsb->init_completion);
> +}
> +
> +static inline void svs_init02_isr_handler(struct mtk_svs *svs)
> +{
> + struct svs_bank *svsb = svs->bank;
> + enum reg_index rg_i;
> +
> + pr_notice("%s: %s: VOP74:0x%08x, VOP30:0x%08x, DCVALUES:0x%08x\n",
> + svsb->name, __func__, svs_readl(svs, VOP74),
> + svs_readl(svs, VOP30), svs_readl(svs, DCVALUES));
> +
> + for (rg_i = TEMPMONCTL0; rg_i < reg_num; rg_i++)
> + svsb->reg_data[SVSB_PHASE_INIT02][rg_i] = svs_readl(svs, rg_i);
> +
> + svsb->phase = SVSB_PHASE_INIT02;
> + svsb->ops->get_vops(svs);
> + memcpy(svsb->init02_volts, svsb->volts, sizeof(u32) * svsb->opp_count);
> +
> + svs_writel(svs, SVSEN_OFF, SVSEN);
> + svs_writel(svs, INTSTS_COMPLETE, INTSTS);
> +
> + complete(&svsb->init_completion);
> +}
> +
> +static inline void svs_mon_mode_isr_handler(struct mtk_svs *svs)
> +{
> + struct svs_bank *svsb = svs->bank;
> + enum reg_index rg_i;
> +
> + for (rg_i = TEMPMONCTL0; rg_i < reg_num; rg_i++)
> + svsb->reg_data[SVSB_PHASE_MON][rg_i] = svs_readl(svs, rg_i);
> +
> + svsb->phase = SVSB_PHASE_MON;
> + svsb->svs_temp = svs_readl(svs, TEMP) & GENMASK(7, 0);
> + svsb->ops->get_vops(svs);
> +
> + svs_writel(svs, INTSTS_MONVOP, INTSTS);
> +}
> +
> +static inline void svs_error_isr_handler(struct mtk_svs *svs)
> +{
> + const struct svs_platform *svsp = svs->platform;
> + struct svs_bank *svsb = svs->bank;
> + enum reg_index rg_i;
> +
> + pr_err("%s(): %s(%s)", __func__, svsp->name, svsb->name);
> + pr_err("CORESEL(0x%x) = 0x%08x\n",
> + svsp->regs[CORESEL], svs_readl(svs, CORESEL)),
> + pr_err("SVSEN(0x%x) = 0x%08x, INTSTS(0x%x) = 0x%08x\n",
> + svsp->regs[SVSEN], svs_readl(svs, SVSEN),
> + svsp->regs[INTSTS], svs_readl(svs, INTSTS));
> + pr_err("SMSTATE0(0x%x) = 0x%08x, SMSTATE1(0x%x) = 0x%08x\n",
> + svsp->regs[SMSTATE0], svs_readl(svs, SMSTATE0),
> + svsp->regs[SMSTATE1], svs_readl(svs, SMSTATE1));
> + pr_err("TEMP(0x%x) = 0x%08x, TEMPMSR0(0x%x) = 0x%08x\n",
> + svsp->regs[TEMP], svs_readl(svs, TEMP),
> + svsp->regs[TEMPMSR0], svs_readl(svs, TEMPMSR0));
> + pr_err("TEMPMSR1(0x%x) = 0x%08x, TEMPMSR2(0x%x) = 0x%08x\n",
> + svsp->regs[TEMPMSR1], svs_readl(svs, TEMPMSR1),
> + svsp->regs[TEMPMSR2], svs_readl(svs, TEMPMSR2));
> + pr_err("TEMPMONCTL0(0x%x) = 0x%08x, TEMPMSRCTL1(0x%x) = 0x%08x\n",
> + svsp->regs[TEMPMONCTL0], svs_readl(svs, TEMPMONCTL0),
> + svsp->regs[TEMPMSRCTL1], svs_readl(svs, TEMPMSRCTL1));
> +
> + for (rg_i = TEMPMONCTL0; rg_i < reg_num; rg_i++)
> + svsb->reg_data[SVSB_PHASE_MON][rg_i] = svs_readl(svs, rg_i);
> +
> + svsb->mode_support = SVSB_MODE_ALL_DISABLE;
> +
> + if (svsb->phase != SVSB_PHASE_INIT01)
> + svsb->phase = SVSB_PHASE_ERROR;
> +
> + svs_writel(svs, SVSEN_OFF, SVSEN);
> + svs_writel(svs, INTSTS_CLEAN, INTSTS);
> +}
> +
> +static irqreturn_t svs_isr(int irq, void *data)
> +{
> + struct mtk_svs *svs = (struct mtk_svs *)data;
> + const struct svs_platform *svsp = svs->platform;
> + struct svs_bank *svsb = NULL;
> + unsigned long flags;
> + u32 idx, int_sts, svs_en;
> +
> + flags = claim_mtk_svs_lock();
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + svs->bank = svsb;
> +
> + if (svsb->int_st & svs_readl(svs, INTST))
> + continue;
> +
> + if (!svsb->suspended) {
> + svs_switch_bank(svs);
> + int_sts = svs_readl(svs, INTSTS);
> + svs_en = svs_readl(svs, SVSEN);
> +
> + if (int_sts == INTSTS_COMPLETE &&
> + ((svs_en & SVSEN_MASK) == SVSEN_INIT01))
> + svs_init01_isr_handler(svs);
> + else if ((int_sts == INTSTS_COMPLETE) &&
> + ((svs_en & SVSEN_MASK) == SVSEN_INIT02))
> + svs_init02_isr_handler(svs);
> + else if (!!(int_sts & INTSTS_MONVOP))
> + svs_mon_mode_isr_handler(svs);
> + else
> + svs_error_isr_handler(svs);
> + }
> +
> + break;
> + }
> + release_mtk_svs_lock(flags);
> +
> + if (svsb->phase != SVSB_PHASE_INIT01)
> + svsb_set_volts(svsb, false);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static void svs_mon_mode(struct mtk_svs *svs)
> +{
> + const struct svs_platform *svsp = svs->platform;
> + struct svs_bank *svsb;
> + unsigned long flags;
> + u32 idx;
> +
> + flags = claim_mtk_svs_lock();
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + svs->bank = svsb;
> +
> + if (!(svsb->mode_support & SVSB_MODE_MON))
> + continue;
> +
> + svs_set_phase(svs, SVSB_PHASE_MON);
> + }
> + release_mtk_svs_lock(flags);
> +}
> +
> +static int svs_init02(struct mtk_svs *svs)
> +{
> + const struct svs_platform *svsp = svs->platform;
> + struct svs_bank *svsb;
> + unsigned long flags, time_left;
> + u32 idx;
> +
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + svs->bank = svsb;
> +
> + if (!(svsb->mode_support & SVSB_MODE_INIT02))
> + continue;
> +
> + reinit_completion(&svsb->init_completion);
> + flags = claim_mtk_svs_lock();
> + svs_set_phase(svs, SVSB_PHASE_INIT02);
> + release_mtk_svs_lock(flags);
> + time_left =
> + wait_for_completion_timeout(&svsb->init_completion,
> + msecs_to_jiffies(2000));
> + if (!time_left) {
> + pr_err("%s: init02 completion timeout\n", svsb->name);
> + return -EBUSY;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int svs_init01(struct mtk_svs *svs)
> +{
> + const struct svs_platform *svsp = svs->platform;
> + struct svs_bank *svsb;
> + struct pm_qos_request *qos_request;
> + unsigned long flags, time_left;
> + bool search_done;
> + int ret = -EPERM;
> + u32 opp_freqs, opp_vboot, buck_volt, idx, i;
> +
> + qos_request = kzalloc(sizeof(*qos_request), GFP_KERNEL);
> + if (!qos_request)
> + return -ENOMEM;
> +
> + /* Let CPUs leave idle-off state for initializing svs_init01. */
> + cpu_latency_qos_add_request(qos_request, 0);
> +
> + /*
> + * Sometimes two svs banks use the same buck.
> + * Therefore, we set each svs bank to vboot voltage first.
> + */
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + search_done = false;
> +
> + ret = regulator_set_mode(svsb->buck, REGULATOR_MODE_FAST);
> + if (ret)
> + pr_notice("%s: fail to set fast mode: %d\n",
> + svsb->name, ret);
> +
> + if (svsb->mtcmos_request) {
> + ret = regulator_enable(svsb->buck);
> + if (ret) {
> + pr_err("%s: fail to enable %s power: %d\n",
> + svsb->name, svsb->buck_name, ret);
> + goto init01_finish;
> + }
> +
> + ret = dev_pm_domain_attach(svsb->dev, false);
> + if (ret) {
> + pr_err("%s: attach pm domain fail: %d\n",
> + svsb->name, ret);
> + goto init01_finish;
> + }
> +
> + pm_runtime_enable(svsb->dev);
> + ret = pm_runtime_get_sync(svsb->dev);
> + if (ret < 0) {
> + pr_err("%s: turn mtcmos on fail: %d\n",
> + svsb->name, ret);
> + goto init01_finish;
> + }
> + }
> +
> + /*
> + * Find the fastest freq that can be run at vboot and
> + * fix to that freq until svs_init01 is done.
> + */
> + opp_vboot = svsb_volt_to_opp_volt(svsb->vboot,
> + svsb->volt_step,
> + svsb->volt_base);
> +
> + for (i = 0; i < svsb->opp_count; i++) {
> + opp_freqs = svsb->opp_freqs[i];
> + if (!search_done && svsb->opp_volts[i] <= opp_vboot) {
> + ret = dev_pm_opp_adjust_voltage(svsb->dev,
> + opp_freqs,
> + opp_vboot,
> + opp_vboot,
> + opp_vboot);
> + if (ret) {
> + pr_err("%s: set voltage failed: %d\n",
> + svsb->name, ret);
> + goto init01_finish;
> + }
> +
> + search_done = true;
> + } else {
> + dev_pm_opp_disable(svsb->dev,
> + svsb->opp_freqs[i]);
> + }
> + }
> + }
> +
> + /* svs bank init01 begins */
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + svs->bank = svsb;
> +
> + if (!(svsb->mode_support & SVSB_MODE_INIT01))
> + continue;
> +
> + opp_vboot = svsb_volt_to_opp_volt(svsb->vboot,
> + svsb->volt_step,
> + svsb->volt_base);
> +
> + buck_volt = regulator_get_voltage(svsb->buck);
> + if (buck_volt != opp_vboot) {
> + pr_err("%s: buck voltage: %u, expected vboot: %u\n",
> + svsb->name, buck_volt, opp_vboot);
> + ret = -EPERM;
> + goto init01_finish;
> + }
> +
> + init_completion(&svsb->init_completion);
> + flags = claim_mtk_svs_lock();
> + svs_set_phase(svs, SVSB_PHASE_INIT01);
> + release_mtk_svs_lock(flags);
> + time_left =
> + wait_for_completion_timeout(&svsb->init_completion,
> + msecs_to_jiffies(2000));
> + if (!time_left) {
> + pr_err("%s: init01 completion timeout\n", svsb->name);
> + ret = -EBUSY;
> + goto init01_finish;
> + }
> + }
> +
> +init01_finish:
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> +
> + for (i = 0; i < svsb->opp_count; i++)
> + dev_pm_opp_enable(svsb->dev, svsb->opp_freqs[i]);
> +
> + if (regulator_set_mode(svsb->buck, REGULATOR_MODE_NORMAL))
> + pr_notice("%s: fail to set normal mode: %d\n",
> + svsb->name, ret);
> +
> + if (svsb->mtcmos_request) {
> + if (pm_runtime_put_sync(svsb->dev))
> + pr_err("%s: turn mtcmos off fail: %d\n",
> + svsb->name, ret);
> + pm_runtime_disable(svsb->dev);
> + dev_pm_domain_detach(svsb->dev, 0);
> + if (regulator_disable(svsb->buck))
> + pr_err("%s: fail to disable %s power: %d\n",
> + svsb->name, svsb->buck_name, ret);
> + }
> + }
> +
> + cpu_latency_qos_remove_request(qos_request);
> + kfree(qos_request);
> +
> + return ret;
> +}
> +
> +static int svs_start(struct mtk_svs *svs)
> +{
> + int ret;
> +
> + ret = svs_init01(svs);
> + if (ret)
> + return ret;
> +
> + ret = svs_init02(svs);
> + if (ret)
> + return ret;
> +
> + svs_mon_mode(svs);
> +
> + return ret;
> +}
> +
> +static bool svs_mt8183_efuse_parsing(struct mtk_svs *svs)
> +{
> + const struct svs_platform *svsp = svs->platform;
> + struct thermal_parameter tp;
> + struct svs_bank *svsb;
> + bool mon_mode_support = true;
> + int format[6], x_roomt[6], tb_roomt = 0;
> + struct nvmem_cell *cell;
> + size_t len;
> + u32 idx, i, ft_pgm, mts, temp0, temp1, temp2;
> +
> + if (svsp->fake_efuse) {
> + pr_notice("fake efuse\n");
> + svs->efuse[0] = 0x00310080;
> + svs->efuse[1] = 0xabfbf757;
> + svs->efuse[2] = 0x47c747c7;
> + svs->efuse[3] = 0xabfbf757;
> + svs->efuse[4] = 0xe7fca0ec;
> + svs->efuse[5] = 0x47bf4b88;
> + svs->efuse[6] = 0xabfb8fa5;
> + svs->efuse[7] = 0xabfb217b;
> + svs->efuse[8] = 0x4bf34be1;
> + svs->efuse[9] = 0xabfb670d;
> + svs->efuse[16] = 0xabfbc653;
> + svs->efuse[17] = 0x47f347e1;
> + svs->efuse[18] = 0xabfbd848;
> + }
> +
> + for (i = 0; i < svsp->efuse_num; i++)
> + if (svs->efuse[i])
> + pr_notice("M_HW_RES%d: 0x%08x\n", i, svs->efuse[i]);
> +
> + /* svs efuse parsing */
> + ft_pgm = (svs->efuse[0] >> 4) & GENMASK(3, 0);
> +
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + if (ft_pgm <= 1)
> + svsb->init01_volt_flag = SVSB_INIT01_VOLT_IGNORE;
> +
> + switch (svsb->sw_id) {
> + case SVS_CPU_LITTLE:
> + svsb->bdes = svs->efuse[16] & GENMASK(7, 0);
> + svsb->mdes = (svs->efuse[16] >> 8) & GENMASK(7, 0);
> + svsb->dcbdet = (svs->efuse[16] >> 16) & GENMASK(7, 0);
> + svsb->dcmdet = (svs->efuse[16] >> 24) & GENMASK(7, 0);
> + svsb->mtdes = (svs->efuse[17] >> 16) & GENMASK(7, 0);
> +
> + if (ft_pgm <= 3)
> + svsb->volt_offset += 10;
> + else
> + svsb->volt_offset += 2;
> + break;
> + case SVS_CPU_BIG:
> + svsb->bdes = svs->efuse[18] & GENMASK(7, 0);
> + svsb->mdes = (svs->efuse[18] >> 8) & GENMASK(7, 0);
> + svsb->dcbdet = (svs->efuse[18] >> 16) & GENMASK(7, 0);
> + svsb->dcmdet = (svs->efuse[18] >> 24) & GENMASK(7, 0);
> + svsb->mtdes = svs->efuse[17] & GENMASK(7, 0);
> +
> + if (ft_pgm <= 3)
> + svsb->volt_offset += 15;
> + else
> + svsb->volt_offset += 12;
> + break;
> + case SVS_CCI:
> + svsb->bdes = svs->efuse[4] & GENMASK(7, 0);
> + svsb->mdes = (svs->efuse[4] >> 8) & GENMASK(7, 0);
> + svsb->dcbdet = (svs->efuse[4] >> 16) & GENMASK(7, 0);
> + svsb->dcmdet = (svs->efuse[4] >> 24) & GENMASK(7, 0);
> + svsb->mtdes = (svs->efuse[5] >> 16) & GENMASK(7, 0);
> +
> + if (ft_pgm <= 3)
> + svsb->volt_offset += 10;
> + else
> + svsb->volt_offset += 2;
> + break;
> + case SVS_GPU:
> + svsb->bdes = svs->efuse[6] & GENMASK(7, 0);
> + svsb->mdes = (svs->efuse[6] >> 8) & GENMASK(7, 0);
> + svsb->dcbdet = (svs->efuse[6] >> 16) & GENMASK(7, 0);
> + svsb->dcmdet = (svs->efuse[6] >> 24) & GENMASK(7, 0);
> + svsb->mtdes = svs->efuse[5] & GENMASK(7, 0);
> +
> + if (ft_pgm >= 2) {
> + svsb->freq_base = 800000000; /* 800MHz */
> + svsb->dvt_fixed = 2;
> + }
> + break;
> + default:
> + break;
> + }
> + }
> +
> + if (svsp->fake_efuse) {
> + svs->thermal_efuse[0] = 0x02873f69;
> + svs->thermal_efuse[1] = 0xa11d9142;
> + svs->thermal_efuse[2] = 0xa2526900;
> + } else {
> + /* Get thermal efuse by nvmem */
> + cell = nvmem_cell_get(svs->dev, "calibration-data");
> + if (IS_ERR(cell)) {
> + pr_err("no thermal efuse? disable mon mode\n");
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + svsb->mode_support &= ~SVSB_MODE_MON;
> + }
> +
> + return true;
> + }
> +
> + svs->thermal_efuse = (u32 *)nvmem_cell_read(cell, &len);
> + nvmem_cell_put(cell);
> + }
> +
> + /* Thermal efuse parsing */
> + tp.adc_ge_t = (svs->thermal_efuse[1] >> 22) & GENMASK(9, 0);
> + tp.adc_oe_t = (svs->thermal_efuse[1] >> 12) & GENMASK(9, 0);
> +
> + tp.o_vtsmcu1 = (svs->thermal_efuse[0] >> 17) & GENMASK(8, 0);
> + tp.o_vtsmcu2 = (svs->thermal_efuse[0] >> 8) & GENMASK(8, 0);
> + tp.o_vtsmcu3 = svs->thermal_efuse[1] & GENMASK(8, 0);
> + tp.o_vtsmcu4 = (svs->thermal_efuse[2] >> 23) & GENMASK(8, 0);
> + tp.o_vtsmcu5 = (svs->thermal_efuse[2] >> 5) & GENMASK(8, 0);
> + tp.o_vtsabb = (svs->thermal_efuse[2] >> 14) & GENMASK(8, 0);
> +
> + tp.degc_cali = (svs->thermal_efuse[0] >> 1) & GENMASK(5, 0);
> + tp.adc_cali_en_t = svs->thermal_efuse[0] & BIT(0);
> + tp.o_slope_sign = (svs->thermal_efuse[0] >> 7) & BIT(0);
> +
> + tp.ts_id = (svs->thermal_efuse[1] >> 9) & BIT(0);
> + tp.o_slope = (svs->thermal_efuse[0] >> 26) & GENMASK(5, 0);
> +
> + if (tp.adc_cali_en_t == 1) {
> + if (!tp.ts_id)
> + tp.o_slope = 0;
> +
> + if ((tp.adc_ge_t < 265 || tp.adc_ge_t > 758) ||
> + (tp.adc_oe_t < 265 || tp.adc_oe_t > 758) ||
> + (tp.o_vtsmcu1 < -8 || tp.o_vtsmcu1 > 484) ||
> + (tp.o_vtsmcu2 < -8 || tp.o_vtsmcu2 > 484) ||
> + (tp.o_vtsmcu3 < -8 || tp.o_vtsmcu3 > 484) ||
> + (tp.o_vtsmcu4 < -8 || tp.o_vtsmcu4 > 484) ||
> + (tp.o_vtsmcu5 < -8 || tp.o_vtsmcu5 > 484) ||
> + (tp.o_vtsabb < -8 || tp.o_vtsabb > 484) ||
> + (tp.degc_cali < 1 || tp.degc_cali > 63)) {
> + pr_err("bad thermal efuse data, disable mon mode\n");
> + mon_mode_support = false;
> + }
> + } else {
> + pr_err("no thermal efuse data, disable mon mode\n");
> + mon_mode_support = false;
> + }
> +
> + if (!mon_mode_support) {
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + svsb->mode_support &= ~SVSB_MODE_MON;
> + }
> +
> + return true;
> + }
> +
> + tp.ge = ((tp.adc_ge_t - 512) * 10000) / 4096;
> + tp.oe = (tp.adc_oe_t - 512);
> + tp.gain = (10000 + tp.ge);
> +
> + format[0] = (tp.o_vtsmcu1 + 3350 - tp.oe);
> + format[1] = (tp.o_vtsmcu2 + 3350 - tp.oe);
> + format[2] = (tp.o_vtsmcu3 + 3350 - tp.oe);
> + format[3] = (tp.o_vtsmcu4 + 3350 - tp.oe);
> + format[4] = (tp.o_vtsmcu5 + 3350 - tp.oe);
> + format[5] = (tp.o_vtsabb + 3350 - tp.oe);
> +
> + for (i = 0; i < 6; i++)
> + x_roomt[i] = (((format[i] * 10000) / 4096) * 10000) / tp.gain;
> +
> + temp0 = (10000 * 100000 / tp.gain) * 15 / 18;
> +
> + if (!tp.o_slope_sign)
> + mts = (temp0 * 10) / (1534 + tp.o_slope * 10);
> + else
> + mts = (temp0 * 10) / (1534 - tp.o_slope * 10);
> +
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + svsb->mts = mts;
> +
> + switch (svsb->sw_id) {
> + case SVS_CPU_LITTLE:
> + tb_roomt = x_roomt[3];
> + break;
> + case SVS_CPU_BIG:
> + tb_roomt = x_roomt[4];
> + break;
> + case SVS_CCI:
> + tb_roomt = x_roomt[3];
> + break;
> + case SVS_GPU:
> + tb_roomt = x_roomt[1];
> + break;
> + default:
> + break;
> + }
> +
> + temp0 = (tp.degc_cali * 10 / 2);
> + temp1 = ((10000 * 100000 / 4096 / tp.gain) *
> + tp.oe + tb_roomt * 10) * 15 / 18;
> +
> + if (!tp.o_slope_sign)
> + temp2 = temp1 * 100 / (1534 + tp.o_slope * 10);
> + else
> + temp2 = temp1 * 100 / (1534 - tp.o_slope * 10);
> +
> + svsb->bts = (temp0 + temp2 - 250) * 4 / 10;
> + }
> +
> + return true;
> +}
> +
> +static bool svs_is_supported(struct mtk_svs *svs)
> +{
> + const struct svs_platform *svsp = svs->platform;
> + struct nvmem_cell *cell;
> + size_t len;
> + bool ret;
> +
> + if (svsp->fake_efuse) {
> + len = svsp->efuse_num * sizeof(u32);
> + svs->efuse = devm_kzalloc(svs->dev, len, GFP_KERNEL);
> + if (!svs->efuse) {
> + pr_err("no memory for allocating svs_efuse\n");
> + return false;
> + }
> +
> + len = svsp->thermal_efuse_num * sizeof(u32);
> + svs->thermal_efuse = devm_kzalloc(svs->dev, len, GFP_KERNEL);
> + if (!svs->thermal_efuse) {
> + pr_err("no memory for allocating svs_thermal_efuse\n");
> + return false;
> + }
> +
> + goto svsp_efuse_parsing;
> + }
> +
> + /* Get svs efuse by nvmem */
> + cell = nvmem_cell_get(svs->dev, "svs-calibration-data");
> + if (IS_ERR(cell)) {
> + pr_err("no \"svs-calibration-data\" from dts? disable svs\n");
> + return false;
> + }
> +
> + svs->efuse = (u32 *)nvmem_cell_read(cell, &len);
> + nvmem_cell_put(cell);
> +
> + if (!svs->efuse[svsp->efuse_check]) {
> + pr_err("svs_efuse[%u] = 0x%x?\n",
> + svsp->efuse_check, svs->efuse[svsp->efuse_check]);
> + return false;
> + }
> +
> +svsp_efuse_parsing:
> + ret = svsp->efuse_parsing(svs);
> +
> + return ret;
> +}
> +
> +static int svs_resource_setup(struct mtk_svs *svs)
> +{
> + const struct svs_platform *svsp = svs->platform;
> + struct svs_bank *svsb;
> + struct platform_device *pdev;
> + struct device_node *np = NULL;
> + struct dev_pm_opp *opp;
> + unsigned long freq;
> + int count, ret;
> + u32 idx, i;
> +
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> +
> + switch (svsb->sw_id) {
> + case SVS_CPU_LITTLE:
> + svsb->name = "SVS_CPU_LITTLE";
> + break;
> + case SVS_CPU_BIG:
> + svsb->name = "SVS_CPU_BIG";
> + break;
> + case SVS_CCI:
> + svsb->name = "SVS_CCI";
> + break;
> + case SVS_GPU:
> + svsb->name = "SVS_GPU";
> + break;
> + default:
> + WARN_ON(1);
> + return -EINVAL;
> + }
> +
> + /* Add svs bank device for opp-table/mtcmos/buck control */
> + pdev = platform_device_alloc(svsb->name, 0);
> + if (!pdev) {
> + pr_err("%s: fail to alloc pdev for svs_bank\n",
> + svsb->name);
> + return -ENOMEM;
> + }
> +
> + for_each_child_of_node(svs->dev->of_node, np) {
> + if (of_device_is_compatible(np, svsb->of_compatible)) {
> + pdev->dev.of_node = np;
> + break;
> + }
> + }
> +
> + ret = platform_device_add(pdev);
> + if (ret) {
> + pr_err("%s: fail to add svs_bank device: %d\n",
> + svsb->name, ret);
> + return ret;
> + }
> +
> + svsb->dev = &pdev->dev;
> + dev_set_drvdata(svsb->dev, svs);
> + ret = dev_pm_opp_of_add_table(svsb->dev);
> + if (ret) {
> + pr_err("%s: fail to add opp table: %d\n",
> + svsb->name, ret);
> + return ret;
> + }
> +
> + mutex_init(&svsb->lock);
> +
> + svsb->buck = devm_regulator_get_optional(svsb->dev,
> + svsb->buck_name);
> + if (IS_ERR(svsb->buck)) {
> + pr_err("%s: cannot get regulator \"%s-supply\"\n",
> + svsb->name, svsb->buck_name);
> + return PTR_ERR(svsb->buck);
> + }
> +
> + count = dev_pm_opp_get_opp_count(svsb->dev);
> + if (svsb->opp_count != count) {
> + pr_err("%s: opp_count not \"%u\" but get \"%d\"?\n",
> + svsb->name, svsb->opp_count, count);
> + return count;
> + }
> +
> + for (i = 0, freq = U32_MAX; i < svsb->opp_count; i++, freq--) {
> + opp = dev_pm_opp_find_freq_floor(svsb->dev, &freq);
> + if (IS_ERR(opp)) {
> + pr_err("%s: error opp entry!!, err = %ld\n",
> + svsb->name, PTR_ERR(opp));
> + return PTR_ERR(opp);
> + }
> +
> + svsb->opp_freqs[i] = freq;
> + svsb->opp_volts[i] = dev_pm_opp_get_voltage(opp);
> + svsb->freqs_pct[i] = percent(svsb->opp_freqs[i],
> + svsb->freq_base);
> + dev_pm_opp_put(opp);
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int svs_suspend(struct device *dev)
> +{
> + struct mtk_svs *svs = dev_get_drvdata(dev);
> + const struct svs_platform *svsp = svs->platform;
> + struct svs_bank *svsb;
> + unsigned long flags;
> + int ret;
> + u32 idx;
> +
> + /* Wait if there is processing svs_isr(). Suspend all banks. */
> + flags = claim_mtk_svs_lock();
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + svs->bank = svsb;
> + svs_switch_bank(svs);
> + svs_writel(svs, SVSEN_OFF, SVSEN);
> + svs_writel(svs, INTSTS_CLEAN, INTSTS);
> + svsb->suspended = true;
> + }
> + release_mtk_svs_lock(flags);
> +
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + if (svsb->phase != SVSB_PHASE_INIT01) {
> + svsb->phase = SVSB_PHASE_ERROR;
> + svsb_set_volts(svsb, true);
> + }
> + }
> +
> + if (svsp->need_hw_reset) {
> + ret = device_reset(svs->dev);
> + if (ret) {
> + pr_err("%s: ret = %d\n", __func__, ret);
> + return ret;
> + }
> + }
> +
> + clk_disable_unprepare(svs->main_clk);
> +
> + return 0;
> +}
> +
> +static int svs_resume(struct device *dev)
> +{
> + struct mtk_svs *svs = dev_get_drvdata(dev);
> + const struct svs_platform *svsp = svs->platform;
> + struct svs_bank *svsb;
> + int ret;
> + u32 idx;
> +
> + ret = clk_prepare_enable(svs->main_clk);
> + if (ret) {
> + pr_err("cannot enable main_clk, disable svs\n");
> + return ret;
> + }
> +
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> + svsb->suspended = false;
> + }
> +
> + ret = svs_init02(svs);
> + if (ret)
> + return ret;
> +
> + svs_mon_mode(svs);
> +
> + return 0;
> +}
> +
> +static int svs_debug_proc_show(struct seq_file *m, void *v)
> +{
> + struct svs_bank *svsb = (struct svs_bank *)m->private;
> +
> + if (svsb->phase == SVSB_PHASE_INIT01)
> + seq_puts(m, "init1\n");
> + else if (svsb->phase == SVSB_PHASE_INIT02)
> + seq_puts(m, "init2\n");
> + else if (svsb->phase == SVSB_PHASE_MON)
> + seq_puts(m, "mon mode\n");
> + else if (svsb->phase == SVSB_PHASE_ERROR)
> + seq_puts(m, "disabled\n");
> + else
> + seq_puts(m, "unknown\n");
> +
> + return 0;
> +}
> +
> +static ssize_t svs_debug_proc_write(struct file *file,
> + const char __user *buffer,
> + size_t count, loff_t *pos)
> +{
> + struct svs_bank *svsb = (struct svs_bank *)PDE_DATA(file_inode(file));
> + struct mtk_svs *svs = dev_get_drvdata(svsb->dev);
> + unsigned long flags;
> + int enabled, ret;
> + char *buf = NULL;
> +
> + if (count >= PAGE_SIZE)
> + return -EINVAL;
> +
> + buf = (char *)memdup_user_nul(buffer, count);
> + if (IS_ERR(buf))
> + return PTR_ERR(buf);
> +
> + ret = kstrtoint(buf, 10, &enabled);
> + if (ret)
> + return ret;
> +
> + if (!enabled) {
> + flags = claim_mtk_svs_lock();
> + svs->bank = svsb;
> + svsb->mode_support = SVSB_MODE_ALL_DISABLE;
> + svs_switch_bank(svs);
> + svs_writel(svs, SVSEN_OFF, SVSEN);
> + svs_writel(svs, INTSTS_CLEAN, INTSTS);
> + release_mtk_svs_lock(flags);
> +
> + svsb->phase = SVSB_PHASE_ERROR;
> + svsb_set_volts(svsb, true);
> + }
> +
> + kfree(buf);
> +
> + return count;
> +}
> +
> +proc_fops_rw(svs_debug);
> +
> +static int svs_dump_proc_show(struct seq_file *m, void *v)
> +{
> + struct mtk_svs *svs = (struct mtk_svs *)m->private;
> + const struct svs_platform *svsp = svs->platform;
> + struct svs_bank *svsb;
> + unsigned long svs_reg_addr;
> + u32 idx, i, j;
> +
> + for (i = 0; i < svsp->efuse_num; i++)
> + if (svs->efuse && svs->efuse[i])
> + seq_printf(m, "M_HW_RES%d = 0x%08x\n",
> + i, svs->efuse[i]);
> +
> + for (i = 0; i < svsp->thermal_efuse_num; i++)
> + if (svs->thermal_efuse)
> + seq_printf(m, "THERMAL_EFUSE%d = 0x%08x\n",
> + i, svs->thermal_efuse[i]);
> +
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> +
> + for (i = SVSB_PHASE_INIT01; i <= SVSB_PHASE_MON; i++) {
> + seq_printf(m, "Bank_number = %u\n", svsb->bank_id);
> +
> + if (i < SVSB_PHASE_MON)
> + seq_printf(m, "mode = init%d\n", i + 1);
> + else
> + seq_puts(m, "mode = mon\n");
> +
> + for (j = TEMPMONCTL0; j < reg_num; j++) {
> + svs_reg_addr = (unsigned long)(svs->base +
> + svsp->regs[j]);
> + seq_printf(m, "0x%08lx = 0x%08x\n",
> + svs_reg_addr, svsb->reg_data[i][j]);
> + }
> + }
> + }
> +
> + return 0;
> +}
> +
> +proc_fops_ro(svs_dump);
> +
> +static int svs_status_proc_show(struct seq_file *m, void *v)
> +{
> + struct svs_bank *svsb = (struct svs_bank *)m->private;
> + struct dev_pm_opp *opp;
> + unsigned long freq;
> + int tzone_temp, ret;
> + u32 i;
> +
> + ret = svsb_get_zone_temperature(svsb, &tzone_temp);
> + if (ret)
> + seq_printf(m, "%s: cannot get zone \"%s\" temperature\n",
> + svsb->name, svsb->tzone_name);
> + else
> + seq_printf(m, "%s: temperature = %d\n", svsb->name, tzone_temp);
> +
> + for (i = 0, freq = U32_MAX; i < svsb->opp_count; i++, freq--) {
> + opp = dev_pm_opp_find_freq_floor(svsb->dev, &freq);
> + if (IS_ERR(opp)) {
> + seq_printf(m, "%s: error opp entry!!, err = %ld\n",
> + svsb->name, PTR_ERR(opp));
> + return PTR_ERR(opp);
> + }
> +
> + seq_printf(m, "opp_freqs[%02u]: %lu, volts[%02u]: %lu, ",
> + i, freq, i, dev_pm_opp_get_voltage(opp));
> + seq_printf(m, "svsb_volts[%02u]: 0x%x, freqs_pct[%02u]: %u\n",
> + i, svsb->volts[i], i, svsb->freqs_pct[i]);
> + dev_pm_opp_put(opp);
> + }
> +
> + return 0;
> +}
> +
> +proc_fops_ro(svs_status);
> +
> +static int svs_volt_offset_proc_show(struct seq_file *m, void *v)
> +{
> + struct svs_bank *svsb = (struct svs_bank *)m->private;
> +
> + seq_printf(m, "%d\n", svsb->volt_offset);
> +
> + return 0;
> +}
> +
> +static ssize_t svs_volt_offset_proc_write(struct file *file,
> + const char __user *buffer,
> + size_t count, loff_t *pos)
> +{
> + struct svs_bank *svsb = (struct svs_bank *)PDE_DATA(file_inode(file));
> + char *buf = NULL;
> + s32 volt_offset;
> +
> + if (count >= PAGE_SIZE)
> + return -EINVAL;
> +
> + buf = (char *)memdup_user_nul(buffer, count);
> + if (IS_ERR(buf))
> + return PTR_ERR(buf);
> +
> + if (!kstrtoint(buf, 10, &volt_offset)) {
> + svsb->volt_offset = volt_offset;
> + svsb_set_volts(svsb, true);
> + }
> +
> + kfree(buf);
> +
> + return count;
> +}
> +
> +proc_fops_rw(svs_volt_offset);
> +
> +static int svs_create_svs_procfs(struct mtk_svs *svs)
> +{
> + const struct svs_platform *svsp = svs->platform;
> + struct svs_bank *svsb;
> + struct proc_dir_entry *svs_dir, *bank_dir;
> + u32 idx, i;
> +
> + struct pentry {
> + const char *name;
> + const struct proc_ops *fops;
> + };
> +
> + struct pentry svs_entries[] = {
> + proc_entry(svs_dump),
> + };
> +
> + struct pentry bank_entries[] = {
> + proc_entry(svs_debug),
> + proc_entry(svs_status),
> + proc_entry(svs_volt_offset),
> + };
> +
> + svs_dir = proc_mkdir("svs", NULL);
> + if (!svs_dir) {
> + pr_err("mkdir /proc/svs failed\n");
> + return -EPERM;
> + }
> +
> + for (i = 0; i < ARRAY_SIZE(svs_entries); i++) {
> + if (!proc_create_data(svs_entries[i].name, 0664,
> + svs_dir, svs_entries[i].fops, svs)) {
> + pr_err("create /proc/svs/%s failed\n",
> + svs_entries[i].name);
> + return -EPERM;
> + }
> + }
> +
> + for (idx = 0; idx < svsp->bank_num; idx++) {
> + svsb = &svsp->banks[idx];
> +
> + if (svsb->mode_support == SVSB_MODE_ALL_DISABLE)
> + continue;
> +
> + bank_dir = proc_mkdir(svsb->name, svs_dir);
> + if (!bank_dir) {
> + pr_err("mkdir /proc/svs/%s failed\n", svsb->name);
> + return -EPERM;
> + }
> +
> + for (i = 0; i < ARRAY_SIZE(bank_entries); i++) {
> + if (!proc_create_data(bank_entries[i].name, 0664,
> + bank_dir, bank_entries[i].fops,
> + svsb)) {
> + pr_err("create /proc/svs/%s/%s failed\n",
> + svsb->name, bank_entries[i].name);
> + return -EPERM;
> + }
> + }
> + }
> +
> + return 0;
> +}
> +
> +static struct svs_bank_ops svs_mt8183_banks_ops = {
> + .set_freqs_pct = svs_set_freqs_pct_v2,
> + .get_vops = svs_get_vops_v2,
> +};
> +
> +static struct svs_bank svs_mt8183_banks[4] = {
> + {
> + .of_compatible = "mediatek,mt8183-svs-cpu-little",
> + .sw_id = SVS_CPU_LITTLE,
> + .bank_id = 0,
> + .ops = &svs_mt8183_banks_ops,
> + .tzone_name = "tzts4",
> + .buck_name = "vcpu-little",
> + .mtcmos_request = false,
> + .init01_volt_flag = SVSB_INIT01_VOLT_INC_ONLY,
> + .mode_support = SVSB_MODE_INIT01 | SVSB_MODE_INIT02,
> + .opp_count = 16,
> + .freq_base = 1989000000,
> + .vboot = 0x30,
> + .volt_step = 6250,
> + .volt_base = 500000,
> + .volt_offset = 0,
> + .vmax = 0x64,
> + .vmin = 0x18,
> + .dthi = 0x1,
> + .dtlo = 0xfe,
> + .det_window = 0xa28,
> + .det_max = 0xffff,
> + .age_config = 0x555555,
> + .agem = 0,
> + .dc_config = 0x555555,
> + .dvt_fixed = 0x7,
> + .vco = 0x10,
> + .chk_shift = 0x77,
> + .upper_temp_bound = 0x64,
> + .lower_temp_bound = 0xb2,
> + .high_temp_threashold = HIGH_TEMP_MAX,
> + .low_temp_threashold = 25000,
> + .low_temp_offset = 0,
> + .core_sel = 0x8fff0000,
> + .systemclk_en = BIT(31),
> + .int_st = BIT(0),
> + .ctl0 = 0x00010001,
> + },
> + {
> + .of_compatible = "mediatek,mt8183-svs-cpu-big",
> + .sw_id = SVS_CPU_BIG,
> + .bank_id = 1,
> + .ops = &svs_mt8183_banks_ops,
> + .tzone_name = "tzts5",
> + .buck_name = "vcpu-big",
> + .mtcmos_request = false,
> + .init01_volt_flag = SVSB_INIT01_VOLT_INC_ONLY,
> + .mode_support = SVSB_MODE_INIT01 | SVSB_MODE_INIT02,
> + .opp_count = 16,
> + .freq_base = 1989000000,
> + .vboot = 0x30,
> + .volt_step = 6250,
> + .volt_base = 500000,
> + .volt_offset = 0,
> + .vmax = 0x58,
> + .vmin = 0x10,
> + .dthi = 0x1,
> + .dtlo = 0xfe,
> + .det_window = 0xa28,
> + .det_max = 0xffff,
> + .age_config = 0x555555,
> + .agem = 0,
> + .dc_config = 0x555555,
> + .dvt_fixed = 0x7,
> + .vco = 0x10,
> + .chk_shift = 0x77,
> + .upper_temp_bound = 0x64,
> + .lower_temp_bound = 0xb2,
> + .high_temp_threashold = HIGH_TEMP_MAX,
> + .low_temp_threashold = 25000,
> + .low_temp_offset = 0,
> + .core_sel = 0x8fff0001,
> + .systemclk_en = BIT(31),
> + .int_st = BIT(1),
> + .ctl0 = 0x00000001,
> + },
> + {
> + .of_compatible = "mediatek,mt8183-svs-cci",
> + .sw_id = SVS_CCI,
> + .bank_id = 2,
> + .ops = &svs_mt8183_banks_ops,
> + .tzone_name = "tzts4",
> + .buck_name = "vcci",
> + .mtcmos_request = false,
> + .init01_volt_flag = SVSB_INIT01_VOLT_INC_ONLY,
> + .mode_support = SVSB_MODE_INIT01 | SVSB_MODE_INIT02,
> + .opp_count = 16,
> + .freq_base = 1196000000,
> + .vboot = 0x30,
> + .volt_step = 6250,
> + .volt_base = 500000,
> + .volt_offset = 0,
> + .vmax = 0x64,
> + .vmin = 0x18,
> + .dthi = 0x1,
> + .dtlo = 0xfe,
> + .det_window = 0xa28,
> + .det_max = 0xffff,
> + .age_config = 0x555555,
> + .agem = 0,
> + .dc_config = 0x555555,
> + .dvt_fixed = 0x7,
> + .vco = 0x10,
> + .chk_shift = 0x77,
> + .upper_temp_bound = 0x64,
> + .lower_temp_bound = 0xb2,
> + .high_temp_threashold = HIGH_TEMP_MAX,
> + .low_temp_threashold = 25000,
> + .low_temp_offset = 0,
> + .core_sel = 0x8fff0002,
> + .systemclk_en = BIT(31),
> + .int_st = BIT(2),
> + .ctl0 = 0x00100003,
> + },
> + {
> + .of_compatible = "mediatek,mt8183-svs-gpu",
> + .sw_id = SVS_GPU,
> + .bank_id = 3,
> + .ops = &svs_mt8183_banks_ops,
> + .tzone_name = "tzts2",
> + .buck_name = "vgpu",
> + .mtcmos_request = true,
> + .init01_volt_flag = SVSB_INIT01_VOLT_INC_ONLY,
> + .mode_support = SVSB_MODE_INIT01 | SVSB_MODE_INIT02 |
> + SVSB_MODE_MON,
> + .opp_count = 16,
> + .freq_base = 900000000,
> + .vboot = 0x30,
> + .volt_step = 6250,
> + .volt_base = 500000,
> + .volt_offset = 0,
> + .vmax = 0x40,
> + .vmin = 0x14,
> + .dthi = 0x1,
> + .dtlo = 0xfe,
> + .det_window = 0xa28,
> + .det_max = 0xffff,
> + .age_config = 0x555555,
> + .agem = 0,
> + .dc_config = 0x555555,
> + .dvt_fixed = 0x3,
> + .vco = 0x10,
> + .chk_shift = 0x77,
> + .upper_temp_bound = 0x64,
> + .lower_temp_bound = 0xb2,
> + .high_temp_threashold = HIGH_TEMP_MAX,
> + .low_temp_threashold = 25000,
> + .low_temp_offset = 3,
> + .core_sel = 0x8fff0003,
> + .systemclk_en = BIT(31),
> + .int_st = BIT(3),
> + .ctl0 = 0x00050001,
> + },
> +};
> +
> +static const struct svs_platform svs_mt8183_platform = {
> + .name = "mt8183-svs",
> + .banks = svs_mt8183_banks,
> + .efuse_parsing = svs_mt8183_efuse_parsing,
> + .regs = svs_regs_v2,
> + .irqflags = IRQF_TRIGGER_LOW | IRQF_ONESHOT,
> + .need_hw_reset = false,
> + .fake_efuse = false,
> + .bank_num = 4,
> + .efuse_num = 25,
> + .efuse_check = 2,
> + .thermal_efuse_num = 3,
> +};
> +
> +static const struct of_device_id mtk_svs_of_match[] = {
> + {
> + .compatible = "mediatek,mt8183-svs",
> + .data = &svs_mt8183_platform,
> + }, {
> + /* Sentinel */
> + },
> +};
> +
> +static int svs_add_thermal_device_link(struct platform_device *svs_pdev)
> +{
> + struct device_node *therm_node;
> + struct platform_device *therm_pdev;
> + struct device_link *sup_link;
> + char const *therm_node_name[] = {"thermal"};
> + u32 i;
> +
> + for (i = 0; i < ARRAY_SIZE(therm_node_name); i++) {
> + therm_node = of_find_node_by_name(NULL, therm_node_name[i]);
> + if (therm_node)
> + break;
> + }
> +
> + if (!therm_node) {
> + pr_err("no available thermal node? pass device link\n");
> + return 0;
> + }
> +
> + therm_pdev = of_find_device_by_node(therm_node);
> + if (!therm_pdev) {
> + pr_err("no \"%pOF\" platform device? pass device link\n",
> + therm_node);
> + of_node_put(therm_node);
> + return 0;
> + }
> +
> + of_node_put(therm_node);
> +
> + sup_link = device_link_add(&svs_pdev->dev, &therm_pdev->dev,
> + DL_FLAG_AUTOREMOVE_CONSUMER);
> +
> + if (sup_link->status == DL_STATE_DORMANT)
> + return -EPROBE_DEFER;
> +
> + return 0;
> +}
> +
> +static int svs_probe(struct platform_device *pdev)
> +{
> + const struct of_device_id *of_dev_id;
> + struct mtk_svs *svs;
> + int ret;
> + u32 svs_irq;
> +
> + ret = svs_add_thermal_device_link(pdev);
> + if (ret)
> + return ret;
> +
> + svs = devm_kzalloc(&pdev->dev, sizeof(*svs), GFP_KERNEL);
> + if (!svs)
> + return -ENOMEM;
> +
> + svs->dev = &pdev->dev;
> + if (!svs->dev->of_node) {
> + pr_err("cannot find device node\n");
> + return -ENODEV;
> + }
> +
> + svs->base = of_iomap(svs->dev->of_node, 0);
> + if (IS_ERR(svs->base)) {
> + pr_err("cannot find svs register base\n");
> + return PTR_ERR(svs->base);
> + }
> +
> + of_dev_id = of_match_node(mtk_svs_of_match, svs->dev->of_node);
> + if (!of_dev_id || !of_dev_id->data)
> + return -EINVAL;
> +
> + svs->platform = of_dev_id->data;
> + dev_set_drvdata(svs->dev, svs);
> +
> + svs_irq = irq_of_parse_and_map(svs->dev->of_node, 0);
> + ret = devm_request_threaded_irq(svs->dev, svs_irq, NULL, svs_isr,
> + svs->platform->irqflags, "mtk-svs",
> + svs);
> + if (ret) {
> + pr_err("register irq(%d) failed: %d\n", svs_irq, ret);
> + return ret;
> + }
> +
> + svs->main_clk = devm_clk_get(svs->dev, "main");
> + if (IS_ERR(svs->main_clk)) {
> + pr_err("failed to get clock: %ld\n", PTR_ERR(svs->main_clk));
> + return PTR_ERR(svs->main_clk);
> + }
> +
> + ret = clk_prepare_enable(svs->main_clk);
> + if (ret) {
> + pr_err("cannot enable main clk: %d\n", ret);
> + return ret;
> + }
> +
> + if (!svs_is_supported(svs)) {
> + pr_notice("svs is not supported\n");
> + ret = -EPERM;
> + goto svs_probe_fail;
> + }
> +
> + ret = svs_resource_setup(svs);
> + if (ret)
> + goto svs_probe_fail;
> +
> + ret = svs_start(svs);
> + if (ret)
> + goto svs_probe_fail;
> +
> + ret = svs_create_svs_procfs(svs);
> + if (ret)
> + goto svs_probe_fail;
> +
> + return 0;
> +
> +svs_probe_fail:
> + clk_disable_unprepare(svs->main_clk);
> +
> + return ret;
> +}
> +
> +static const struct dev_pm_ops svs_pm_ops = {
> + .suspend = svs_suspend,
> + .resume = svs_resume,
> +};

Better use the PM macros to define that struct

> +
> +static struct platform_driver svs_driver = {
> + .probe = svs_probe,
> + .driver = {
> + .name = "mtk-svs",
> + .pm = &svs_pm_ops,
> + .of_match_table = of_match_ptr(mtk_svs_of_match),
> + },
> +};
> +
> +static int __init svs_init(void)
> +{
> + int ret;
> +
> + ret = platform_driver_register(&svs_driver);
> + if (ret) {
> + pr_err("svs platform driver register failed: %d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +late_initcall_sync(svs_init);

Why? Can't be this a module_platform_driver?

> +
> +MODULE_DESCRIPTION("MediaTek SVS Driver v1.0");

Don't put the version in the description, there is a MODULE_VERSION
for that purpose.

Also would be good have the MODULE_AUTHOR

> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/power/mtk_svs.h b/include/linux/power/mtk_svs.h
> new file mode 100644
> index 000000000000..5c03982e3576
> --- /dev/null
> +++ b/include/linux/power/mtk_svs.h

I don't think this file is needed just remove it.

> @@ -0,0 +1,23 @@
> +/* SPDX-License-Identifier: GPL-2.0
> + *
> + * Copyright (C) 2020 MediaTek Inc.
> + */
> +
> +#ifndef __MTK_SVS_H__
> +#define __MTK_SVS_H__
> +
> +#if IS_ENABLED(CONFIG_MTK_SVS)
> +unsigned long claim_mtk_svs_lock(void);
> +void release_mtk_svs_lock(unsigned long flags);
> +#else
> +static inline unsigned long claim_mtk_svs_lock(void)
> +{
> + return 0;
> +}
> +
> +static inline void release_mtk_svs_lock(unsigned long flags)
> +{
> +}
> +#endif /* CONFIG_MTK_SVS */
> +
> +#endif /* __MTK_SVS_H__ */
> --
> 2.18.0
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek

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