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SubjectRe: [RESEND PATCH v5 1/5] mfd: RK808: Add RK818 support
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Hi Wadim:

On 2016年07月06日 16:03, Wadim Egorov wrote:
> Hi Andy,
>
> On 06.07.2016 05:15, Andy Yan wrote:
>> Hi Wadim:
>>
>> On 2016年06月09日 16:23, Wadim Egorov wrote:
>>> Hi,
>>>
>>> On 08.06.2016 16:17, Lee Jones wrote:
>>>> On Thu, 02 Jun 2016, Wadim Egorov wrote:
>>>>
>>>>> The RK818 chip is a power management IC for multimedia and handheld
>>>> "Power Management IC (PMIC)"
>>>>
>>>>> devices. It contains the following components:
>>>>>
>>>>> - Regulators
>>>>> - RTC
>>>>> - Clkout
>>>> Clocking
>>>>
>>>>> - battery support
>>>> Battery support
>>>>
>>>>> Both chips RK808 and RK818 are using a similar register map.
>>>> "Both RK808 ad RK818 chips"
>>>>
>>>>> So we can reuse the RTC and Clkout functionality.
>>>> Swap '.' for ','.
>>>>
>>>>> Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
>>>>> ---
>>>>> drivers/mfd/Kconfig | 4 +-
>>>>> drivers/mfd/rk808.c | 231
>>>>> ++++++++++++++++++++++++++++++++++++++--------
>>>>> include/linux/mfd/rk808.h | 162 ++++++++++++++++++++++++++++++--
>>>>> 3 files changed, 350 insertions(+), 47 deletions(-)
>>>>>
>>>>> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
>>>>> index 1bcf601..7ba464b 100644
>>>>> --- a/drivers/mfd/Kconfig
>>>>> +++ b/drivers/mfd/Kconfig
>>>>> @@ -839,13 +839,13 @@ config MFD_RC5T583
>>>>> different functionality of the device.
>>>>> config MFD_RK808
>>>>> - tristate "Rockchip RK808 Power Management chip"
>>>>> + tristate "Rockchip RK808/RK818 Power Management chip"
>>>> "Chip"
>>>>
>>>>> depends on I2C && OF
>>>>> select MFD_CORE
>>>>> select REGMAP_I2C
>>>>> select REGMAP_IRQ
>>>>> help
>>>>> - If you say yes here you get support for the RK808
>>>>> + If you say yes here you get support for the RK808 and RK818
>>>>> Power Management chips.
>>>>> This driver provides common support for accessing the device
>>>>> through I2C interface. The device supports multiple
>>>>> sub-devices
>>>>> diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
>>>>> index 49d7f62..3cf9724 100644
>>>>> --- a/drivers/mfd/rk808.c
>>>>> +++ b/drivers/mfd/rk808.c
>>>>> @@ -1,11 +1,15 @@
>>>>> /*
>>>>> - * MFD core driver for Rockchip RK808
>>>>> + * MFD core driver for Rockchip RK808/RK818
>>>>> *
>>>>> * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
>>>>> *
>>>>> * Author: Chris Zhong <zyw@rock-chips.com>
>>>>> * Author: Zhang Qing <zhangqing@rock-chips.com>
>>>>> *
>>>>> + * Copyright (C) 2016 PHYTEC Messtechnik GmbH
>>>>> + *
>>>>> + * Author: Wadim Egorov <w.egorov@phytec.de>
>>>>> + *
>>>>> * This program is free software; you can redistribute it and/or
>>>>> modify it
>>>>> * under the terms and conditions of the GNU General Public License,
>>>>> * version 2, as published by the Free Software Foundation.
>>>>> @@ -22,12 +26,7 @@
>>>>> #include <linux/mfd/core.h>
>>>>> #include <linux/module.h>
>>>>> #include <linux/regmap.h>
>>>>> -
>>>>> -struct rk808_reg_data {
>>>>> - int addr;
>>>>> - int mask;
>>>>> - int value;
>>>>> -};
>>>> Why are you moving this to the header?
>>> It is now part of the rk808 struct.
>>>
>>>>> +#include <linux/of_device.h>
>>>>> static bool rk808_is_volatile_reg(struct device *dev, unsigned
>>>>> int reg)
>>>>> {
>>>>> @@ -57,6 +56,14 @@ static bool rk808_is_volatile_reg(struct device
>>>>> *dev, unsigned int reg)
>>>>> return false;
>>>>> }
>>>>> +static const struct regmap_config rk818_regmap_config = {
>>>>> + .reg_bits = 8,
>>>>> + .val_bits = 8,
>>>>> + .max_register = RK818_USB_CTRL_REG,
>>>>> + .cache_type = REGCACHE_RBTREE,
>>>>> + .volatile_reg = rk808_is_volatile_reg,
>>>>> +};
>>>>> +
>>>>> static const struct regmap_config rk808_regmap_config = {
>>>>> .reg_bits = 8,
>>>>> .val_bits = 8,
>>>>> @@ -83,7 +90,17 @@ static const struct mfd_cell rk808s[] = {
>>>>> },
>>>>> };
>>>>> -static const struct rk808_reg_data pre_init_reg[] = {
>>>>> +static const struct mfd_cell rk818s[] = {
>>>>> + { .name = "rk808-clkout", },
>>>> How does this differ to a normal -clock driver?
>>> I don't know. It is a normal clock driver.
>>>
>>>>> + { .name = "rk808-regulator", },
>>>>> + {
>>>>> + .name = "rk808-rtc",
>>>>> + .num_resources = ARRAY_SIZE(rtc_resources),
>>>>> + .resources = &rtc_resources[0],
>>>> .resources = rtc_resources, ?
>>>>
>>>>> + },
>>>>> +};
>>>>> +
>>>>> +static const struct rk8xx_reg_data rk808_pre_init_reg[] = {
>>>>> { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_150MA },
>>>>> { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_200MA },
>>>>> { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
>>>>> @@ -94,6 +111,22 @@ static const struct rk808_reg_data
>>>>> pre_init_reg[] = {
>>>>> VB_LO_SEL_3500MV },
>>>>> };
>>>>> +static const struct rk8xx_reg_data rk818_pre_init_reg[] = {
>>>>> + { RK818_USB_CTRL_REG, RK818_USB_ILIM_SEL_MASK,
>>>>> + RK818_USB_ILMIN_2000MA },
>>>>> + /* close charger when usb lower then 3.4V */
>>>>> + { RK818_USB_CTRL_REG, RK818_USB_CHG_SD_VSEL_MASK, (0x7 <<
>>>>> 4) },
>>>>> + /* no action when vref */
>>>>> + { RK818_H5V_EN_REG, BIT(1), RK818_REF_RDY_CTRL },
>>>>> + /* enable HDMI 5V */
>>>>> + { RK818_H5V_EN_REG, BIT(0), RK818_H5V_EN },
>>>>> + /* improve efficiency */
>>>>> + { RK818_BUCK2_CONFIG_REG, BUCK2_RATE_MASK, BUCK_ILMIN_250MA },
>>>>> + { RK818_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_250MA },
>>>>> + { RK818_BOOST_CONFIG_REG, BOOST_ILMIN_MASK,
>>>>> BOOST_ILMIN_100MA },
>>>>> + { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT |
>>>>> VB_LO_SEL_3500MV },
>>>>> +};
>>>> The alignment here looks odd.
>>> I will fix it in the next version.
>>>
>>>>> static const struct regmap_irq rk808_irqs[] = {
>>>>> /* INT_STS */
>>>>> [RK808_IRQ_VOUT_LO] = {
>>>>> @@ -136,6 +169,76 @@ static const struct regmap_irq rk808_irqs[] = {
>>>>> },
>>>>> };
>>>>> +static const struct regmap_irq rk818_irqs[] = {
>>>>> + /* INT_STS */
>>>>> + [RK818_IRQ_VOUT_LO] = {
>>>>> + .mask = RK818_IRQ_VOUT_LO_MSK,
>>>>> + .reg_offset = 0,
>>>>> + },
>>>>> + [RK818_IRQ_VB_LO] = {
>>>>> + .mask = RK818_IRQ_VB_LO_MSK,
>>>>> + .reg_offset = 0,
>>>>> + },
>>>>> + [RK818_IRQ_PWRON] = {
>>>>> + .mask = RK818_IRQ_PWRON_MSK,
>>>>> + .reg_offset = 0,
>>>>> + },
>>>>> + [RK818_IRQ_PWRON_LP] = {
>>>>> + .mask = RK818_IRQ_PWRON_LP_MSK,
>>>>> + .reg_offset = 0,
>>>>> + },
>>>>> + [RK818_IRQ_HOTDIE] = {
>>>>> + .mask = RK818_IRQ_HOTDIE_MSK,
>>>>> + .reg_offset = 0,
>>>>> + },
>>>>> + [RK818_IRQ_RTC_ALARM] = {
>>>>> + .mask = RK818_IRQ_RTC_ALARM_MSK,
>>>>> + .reg_offset = 0,
>>>>> + },
>>>>> + [RK818_IRQ_RTC_PERIOD] = {
>>>>> + .mask = RK818_IRQ_RTC_PERIOD_MSK,
>>>>> + .reg_offset = 0,
>>>>> + },
>>>>> + [RK818_IRQ_USB_OV] = {
>>>>> + .mask = RK818_IRQ_USB_OV_MSK,
>>>>> + .reg_offset = 0,
>>>>> + },
>>>>> +
>>>>> + /* INT_STS2 */
>>>>> + [RK818_IRQ_PLUG_IN] = {
>>>>> + .mask = RK818_IRQ_PLUG_IN_MSK,
>>>>> + .reg_offset = 1,
>>>>> + },
>>>>> + [RK818_IRQ_PLUG_OUT] = {
>>>>> + .mask = RK818_IRQ_PLUG_OUT_MSK,
>>>>> + .reg_offset = 1,
>>>>> + },
>>>>> + [RK818_IRQ_CHG_OK] = {
>>>>> + .mask = RK818_IRQ_CHG_OK_MSK,
>>>>> + .reg_offset = 1,
>>>>> + },
>>>>> + [RK818_IRQ_CHG_TE] = {
>>>>> + .mask = RK818_IRQ_CHG_TE_MSK,
>>>>> + .reg_offset = 1,
>>>>> + },
>>>>> + [RK818_IRQ_CHG_TS1] = {
>>>>> + .mask = RK818_IRQ_CHG_TS1_MSK,
>>>>> + .reg_offset = 1,
>>>>> + },
>>>>> + [RK818_IRQ_TS2] = {
>>>>> + .mask = RK818_IRQ_TS2_MSK,
>>>>> + .reg_offset = 1,
>>>>> + },
>>>>> + [RK818_IRQ_CHG_CVTLIM] = {
>>>>> + .mask = RK818_IRQ_CHG_CVTLIM_MSK,
>>>>> + .reg_offset = 1,
>>>>> + },
>>>>> + [RK818_IRQ_DISCHG_ILIM] = {
>>>>> + .mask = RK818_IRQ_DISCHG_ILIM_MSK,
>>>>> + .reg_offset = 1,
>>>>> + },
>>>>> +};
>>>>> +
>>>>> static struct regmap_irq_chip rk808_irq_chip = {
>>>>> .name = "rk808",
>>>>> .irqs = rk808_irqs,
>>>>> @@ -148,6 +251,18 @@ static struct regmap_irq_chip rk808_irq_chip = {
>>>>> .init_ack_masked = true,
>>>>> };
>>>>> +static struct regmap_irq_chip rk818_irq_chip = {
>>>>> + .name = "rk818",
>>>>> + .irqs = rk818_irqs,
>>>>> + .num_irqs = ARRAY_SIZE(rk818_irqs),
>>>>> + .num_regs = 2,
>>>>> + .irq_reg_stride = 2,
>>>>> + .status_base = RK818_INT_STS_REG1,
>>>>> + .mask_base = RK818_INT_STS_MSK_REG1,
>>>>> + .ack_base = RK818_INT_STS_REG1,
>>>>> + .init_ack_masked = true,
>>>>> +};
>>>>> +
>>>>> static struct i2c_client *rk808_i2c_client;
>>>>> static void rk808_device_shutdown(void)
>>>>> {
>>>>> @@ -167,6 +282,48 @@ static void rk808_device_shutdown(void)
>>>>> dev_err(&rk808_i2c_client->dev, "power off error!\n");
>>>>> }
>>>>> +static const struct of_device_id rk808_of_match[] = {
>>>>> + { .compatible = "rockchip,rk808", .data = (void *) RK808_ID },
>>>>> + { .compatible = "rockchip,rk818", .data = (void *) RK818_ID },
>>>>> + { },
>>>>> +};
>>>>> +MODULE_DEVICE_TABLE(of, rk808_of_match);
>>>>> +
>>>>> +static int rk8xx_match_device(struct rk808 *rk808, struct device
>>>>> *dev)
>>>> If you're going to do it this way, please switch these parameters.
>>>>
>>>> It's more common to return the pointer however.
>>> If it's more common I will return a pointer to rk808.
>>>
>>>>> +{
>>>>> + const struct of_device_id *of_id;
>>>>> +
>>>>> + of_id = of_match_device(rk808_of_match, dev);
>>>>> + if (!of_id) {
>>>>> + dev_err(dev, "Unable to match OF ID\n");
>>>>> + return -ENODEV;
>>>>> + }
>>>>> + rk808->variant = (long) of_id->data;
>>>>> +
>>>>> + switch (rk808->variant) {
>>>>> + case RK808_ID:
>>>>> + rk808->nr_cells = ARRAY_SIZE(rk808s);
>>>>> + rk808->cells = rk808s;
>>>>> + rk808->regmap_cfg = &rk808_regmap_config;
>>>>> + rk808->regmap_irq_chip = &rk808_irq_chip;
>>>>> + rk808->pre_init_reg = rk808_pre_init_reg;
>>>>> + rk808->nr_pre_init_regs = ARRAY_SIZE(rk808_pre_init_reg);
>>>>> + break;
>>>>> + case RK818_ID:
>>>>> + rk808->nr_cells = ARRAY_SIZE(rk818s);
>>>>> + rk808->cells = rk818s;
>>>>> + rk808->regmap_cfg = &rk818_regmap_config;
>>>>> + rk808->regmap_irq_chip = &rk818_irq_chip;
>>>>> + rk808->pre_init_reg = rk818_pre_init_reg;
>>>>> + rk808->nr_pre_init_regs = ARRAY_SIZE(rk818_pre_init_reg);
>>>>> + break;
>>>>> + default:
>>>>> + dev_err(dev, "unsupported RK8XX ID %lu\n", rk808->variant);
>>>>> + return -EINVAL;
>>>>> + }
>>>>> +
>>>>> + return 0;
>>>>> +}
>>>>> static int rk808_probe(struct i2c_client *client,
>>>>> const struct i2c_device_id *id)
>>>>> {
>>>>> @@ -176,46 +333,52 @@ static int rk808_probe(struct i2c_client
>>>>> *client,
>>>>> int ret;
>>>>> int i;
>>>>> - if (!client->irq) {
>>>>> - dev_err(&client->dev, "No interrupt support, no core IRQ\n");
>>>>> - return -EINVAL;
>>>>> - }
>>>>> -
>>>>> rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
>>>>> if (!rk808)
>>>>> return -ENOMEM;
>>>>> - rk808->regmap = devm_regmap_init_i2c(client,
>>>>> &rk808_regmap_config);
>>>>> + ret = rk8xx_match_device(rk808, &client->dev);
>>>> Is there a way to dynamically probe the device? No device ID you can
>>>> read directly from the silicon?
>>> AFAIK there is no device ID register. At least it is not documented in
>>> the manual.
>> register 0x17 and 0x18 is the ID register, 0x17 is the MSB, 0x18 is LSB
>>
>> for RK818, register 0x17 is 0x81, 0x18 is 0x81
> thank you for sharing this information. I have no RK808 PMIC device
> here, so I would also need the IDs for RK808.

I have checked with the RK808 IC designer, the values of register
0x17 and 0x18 are both 0x00.
>
> Lee, you have already applied this series. But I can't find the patches
> in your kernel tree.
> I would like to read the device ID from the register in the probe function.
> Do you want me to base my changes on top of this series or send a new
> version?
>
>
>


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