lkml.org 
[lkml]   [2013]   [Jul]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/2] regulator: Add Dialog DA9063 voltage regulators support.
Date
From: Krystian Garbaciak <krystian.garbaciak@diasemi.com>

The driver adds support for the following DA9063 PMIC regulators:
- 11x LDOs (named LDO1 - LDO11),
- 6x buck converters (BCORE1, BCORE2, BPRO, BMEM, BIO, BPERI),
- 1x power switch to switch on/off 32 KHz oscilator output (32K_OUT).

Regulators provide following operations:
- REGULATOR_CHANGE_STATUS for all regulators,
- REGULATOR_CHANGE_VOLTAGE for LDOs and buck converters,
- REGULATOR_CHANGE_MODE for LDOs and buck converters, where:
- LDOs allow REGULATOR_MODE_NORMAL and REGULATOR_MODE_STANDBY,
- buck converters allow REGULATOR_MODE_FAST, REGULATOR_MODE_NORMAL
and REGULATOR_MODE_STANDBY,
- REGULATOR_CHANGE_CURRENT for buck converters (current limits).

The driver generates REGULATOR_EVENT_OVER_CURRENT for LDO3, LDO4, LDO7, LDO8
and LDO11.

Internally, PMIC provides two voltage configurations for normal and suspend
system state for each regulator. The driver switches between those on
suspend/wake-up to provide quick and fluent output voltage change.

This driver requires MFD core driver for operation.

Signed-off-by: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
drivers/regulator/Kconfig | 10 +
drivers/regulator/Makefile | 1 +
drivers/regulator/da9063-regulator.c | 1042 ++++++++++++++++++++++++++++++++++
3 files changed, 1053 insertions(+)
create mode 100644 drivers/regulator/da9063-regulator.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index f1e6ad9..b976098 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -120,6 +120,16 @@ config REGULATOR_DA9055
This driver can also be built as a module. If so, the module
will be called da9055-regulator.

+config REGULATOR_DA9063
+ tristate "Dialog Semiconductor DA9063 regulators"
+ depends on MFD_DA9063
+ help
+ Say y here to support the BUCKs and LDOs regulators found on
+ DA9063 PMICs.
+
+ This driver can also be built as a module. If so, the module
+ will be called da9063-regulator.
+
config REGULATOR_FAN53555
tristate "Fairchild FAN53555 Regulator"
depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index ba4a3cf..49c9342 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o
obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o
obj-$(CONFIG_REGULATOR_DA9055) += da9055-regulator.o
+obj-$(CONFIG_REGULATOR_DA9063) += da9063-regulator.o
obj-$(CONFIG_REGULATOR_DBX500_PRCMU) += dbx500-prcmu.o
obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o
diff --git a/drivers/regulator/da9063-regulator.c b/drivers/regulator/da9063-regulator.c
new file mode 100644
index 0000000..7b81bf5
--- /dev/null
+++ b/drivers/regulator/da9063-regulator.c
@@ -0,0 +1,1042 @@
+/*
+ * Regulator driver for DA9063 PMIC series
+ *
+ * Copyright 2012 Dialog Semiconductors Ltd.
+ * Copyright 2013 Philipp Zabel, Pengutronix
+ *
+ * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/da9063/core.h>
+#include <linux/mfd/da9063/pdata.h>
+#include <linux/mfd/da9063/registers.h>
+
+
+/* Definition for registering bit fields */
+struct bfield {
+ unsigned short addr;
+ unsigned char mask;
+};
+#define BFIELD(_addr, _mask) \
+ { .addr = _addr, .mask = _mask }
+
+struct field {
+ unsigned short addr;
+ unsigned char mask;
+ unsigned char shift;
+ unsigned char offset;
+};
+#define FIELD(_addr, _mask, _shift, _offset) \
+ { .addr = _addr, .mask = _mask, .shift = _shift, .offset = _offset }
+
+/* Regulator capabilities and registers description */
+struct da9063_regulator_info {
+ struct regulator_desc desc;
+
+ /* Current limiting */
+ unsigned n_current_limits;
+ const int *current_limits;
+
+ /* DA9063 main register fields */
+ struct field mode; /* buck mode of operation */
+ struct bfield suspend;
+ struct bfield sleep;
+ struct bfield suspend_sleep;
+ int suspend_vsel_reg;
+ struct field ilimit;
+
+ /* DA9063 event detection bit */
+ struct bfield oc_event;
+};
+
+/* Macro for switch regulator */
+#define DA9063_SWITCH(chip, regl_name) \
+ .desc.id = chip##_ID_##regl_name, \
+ .desc.name = __stringify(chip##_##regl_name), \
+ .desc.ops = &da9063_switch_ops, \
+ .desc.n_voltages = 0
+
+/* Macros for LDO */
+#define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
+ .desc.id = chip##_ID_##regl_name, \
+ .desc.name = __stringify(chip##_##regl_name), \
+ .desc.ops = &da9063_ldo_ops, \
+ .desc.min_uV = (min_mV) * 1000, \
+ .desc.uV_step = (step_mV) * 1000, \
+ .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1)
+
+#define DA9063_LDO_COMMON_FIELDS(regl_name) \
+ .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
+ .desc.enable_mask = DA9063_LDO_EN, \
+ .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
+ .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
+ .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
+ .desc.vsel_mask = DA9063_V##regl_name##_MASK, \
+ .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
+ .suspend_vsel_reg = DA9063_REG_V##regl_name##_B
+
+/* linear_min_sel */
+
+/* Macros for voltage DC/DC converters (BUCKs) */
+#define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array) \
+ .desc.id = chip##_ID_##regl_name, \
+ .desc.name = __stringify(chip##_##regl_name), \
+ .desc.ops = &da9063_buck_ops, \
+ .desc.min_uV = (min_mV) * 1000, \
+ .desc.uV_step = (step_mV) * 1000, \
+ .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
+ .current_limits = limits_array, \
+ .n_current_limits = ARRAY_SIZE(limits_array)
+
+#define DA9063_BUCK_COMMON_FIELDS(regl_name) \
+ .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
+ .desc.enable_mask = DA9063_BUCK_EN, \
+ .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
+ .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
+ .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
+ .desc.vsel_mask = DA9063_VBUCK_MASK, \
+ .desc.linear_min_sel = DA9063_VBUCK_BIAS, \
+ .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
+ .mode = FIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK, \
+ DA9063_BUCK_MODE_SHIFT, 0)
+
+/* Defines asignment of regulators info table to chip model */
+struct da9063_dev_model {
+ const struct da9063_regulator_info *regulator_info;
+ unsigned n_regulators;
+ unsigned dev_model;
+};
+
+/* Single regulator settings */
+struct da9063_regulator {
+ struct regulator_desc desc;
+ struct regulator_dev *rdev;
+ struct da9063 *hw;
+ const struct da9063_regulator_info *info;
+
+ unsigned mode;
+ unsigned suspend_mode;
+};
+
+/* Encapsulates all information for the regulators driver */
+struct da9063_regulators {
+ int irq_ldo_lim;
+ int irq_uvov;
+
+ unsigned n_regulators;
+ /* Array size to be defined during init. Keep at end. */
+ struct da9063_regulator regulator[0];
+};
+
+/* System states for da9063_update_mode_internal()
+ and for da9063_get_mode_internal() */
+enum {
+ SYS_STATE_NORMAL,
+ SYS_STATE_SUSPEND,
+ SYS_STATE_CURRENT
+};
+
+/* BUCK modes for DA9063 */
+enum {
+ BUCK_MODE_MANUAL, /* 0 */
+ BUCK_MODE_SLEEP, /* 1 */
+ BUCK_MODE_SYNC, /* 2 */
+ BUCK_MODE_AUTO /* 3 */
+};
+
+/* Regulator operations */
+static int da9063_set_current_limit(struct regulator_dev *rdev,
+ int min_uA, int max_uA);
+static int da9063_get_current_limit(struct regulator_dev *rdev);
+static int da9063_enable(struct regulator_dev *rdev);
+static int da9063_set_mode(struct regulator_dev *rdev, unsigned int mode);
+static unsigned da9063_get_mode(struct regulator_dev *rdev);
+static int da9063_get_status(struct regulator_dev *rdev);
+static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV);
+static int da9063_suspend_enable(struct regulator_dev *rdev);
+static int da9063_set_suspend_mode(struct regulator_dev *rdev, unsigned mode);
+
+static struct regulator_ops da9063_switch_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .set_suspend_enable = regulator_enable_regmap,
+ .set_suspend_disable = regulator_disable_regmap,
+};
+
+static struct regulator_ops da9063_ldo_ops = {
+ .enable = da9063_enable,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear,
+ .set_mode = da9063_set_mode,
+ .get_mode = da9063_get_mode,
+ .get_status = da9063_get_status,
+ .set_suspend_voltage = da9063_set_suspend_voltage,
+ .set_suspend_enable = da9063_suspend_enable,
+ .set_suspend_disable = regulator_disable_regmap,
+ .set_suspend_mode = da9063_set_suspend_mode,
+};
+
+static struct regulator_ops da9063_buck_ops = {
+ .enable = da9063_enable,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear,
+ .set_current_limit = da9063_set_current_limit,
+ .get_current_limit = da9063_get_current_limit,
+ .set_mode = da9063_set_mode,
+ .get_mode = da9063_get_mode,
+ .get_status = da9063_get_status,
+ .set_suspend_voltage = da9063_set_suspend_voltage,
+ .set_suspend_enable = da9063_suspend_enable,
+ .set_suspend_disable = regulator_disable_regmap,
+ .set_suspend_mode = da9063_set_suspend_mode,
+};
+
+/* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
+ Entry indexes corresponds to register values. */
+static const int da9063_buck_a_limits[] = {
+ 500000, 600000, 700000, 800000, 900000, 1000000, 1100000, 1200000,
+ 1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
+};
+
+/* Current limits array (in uA) for BMEM, BIO, BPERI.
+ Entry indexes corresponds to register values. */
+static const int da9063_buck_b_limits[] = {
+ 1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
+ 2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
+};
+
+/* Current limits array (in uA) for merged BCORE1 and BCORE2.
+ Entry indexes corresponds to register values. */
+static const int da9063_bcores_merged_limits[] = {
+ 1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
+ 2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
+};
+
+/* Current limits array (in uA) for merged BMEM and BIO.
+ Entry indexes corresponds to register values. */
+static const int da9063_bmem_bio_merged_limits[] = {
+ 3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
+ 4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
+};
+
+/* Info of regulators for DA9063 */
+static const struct da9063_regulator_info da9063_regulator_info[] = {
+ {
+ DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
+ da9063_buck_a_limits),
+ DA9063_BUCK_COMMON_FIELDS(BCORE1),
+ .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
+ .ilimit = FIELD(DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK,
+ DA9063_BCORE1_ILIM_SHIFT, 0),
+ },
+ {
+ DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
+ da9063_buck_a_limits),
+ DA9063_BUCK_COMMON_FIELDS(BCORE2),
+ .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
+
+ .ilimit = FIELD(DA9063_REG_BUCK_ILIM_C,
+ DA9063_BCORE2_ILIM_MASK,
+ DA9063_BCORE2_ILIM_SHIFT,
+ 0),
+ },
+ {
+ DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
+ da9063_buck_a_limits),
+ DA9063_BUCK_COMMON_FIELDS(BPRO),
+ .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
+ .ilimit = FIELD(DA9063_REG_BUCK_ILIM_B, DA9063_BPRO_ILIM_MASK,
+ DA9063_BPRO_ILIM_SHIFT, 0),
+ },
+ {
+ DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
+ da9063_buck_b_limits),
+ DA9063_BUCK_COMMON_FIELDS(BMEM),
+ .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
+ .ilimit = FIELD(DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK,
+ DA9063_BMEM_ILIM_SHIFT, 0),
+ },
+ {
+ DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
+ da9063_buck_b_limits),
+ DA9063_BUCK_COMMON_FIELDS(BIO),
+ .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
+ .ilimit = FIELD(DA9063_REG_BUCK_ILIM_A, DA9063_BIO_ILIM_MASK,
+ DA9063_BIO_ILIM_SHIFT, 0),
+ },
+ {
+ DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
+ da9063_buck_b_limits),
+ DA9063_BUCK_COMMON_FIELDS(BPERI),
+ .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
+ .ilimit = FIELD(DA9063_REG_BUCK_ILIM_B, DA9063_BPERI_ILIM_MASK,
+ DA9063_BPERI_ILIM_SHIFT, 0),
+ },
+ {
+ DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
+ da9063_bcores_merged_limits),
+ /* BCORES_MERGED uses the same register fields as BCORE1 */
+ DA9063_BUCK_COMMON_FIELDS(BCORE1),
+ .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
+ .ilimit = FIELD(DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK,
+ DA9063_BCORE1_ILIM_SHIFT, 0),
+ },
+ {
+ DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
+ da9063_bmem_bio_merged_limits),
+ /* BMEM_BIO_MERGED uses the same register fields as BMEM */
+ DA9063_BUCK_COMMON_FIELDS(BMEM),
+ .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
+ .ilimit = FIELD(DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK,
+ DA9063_BMEM_ILIM_SHIFT, 0),
+ },
+ {
+ DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
+ DA9063_LDO_COMMON_FIELDS(LDO1),
+ .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
+ },
+ {
+ DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
+ DA9063_LDO_COMMON_FIELDS(LDO2),
+ .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
+ },
+ {
+ DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
+ DA9063_LDO_COMMON_FIELDS(LDO3),
+ .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
+ .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
+ },
+ {
+ DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
+ DA9063_LDO_COMMON_FIELDS(LDO4),
+ .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
+ .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
+ },
+ {
+ DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
+ DA9063_LDO_COMMON_FIELDS(LDO5),
+ .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
+ },
+ {
+ DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
+ DA9063_LDO_COMMON_FIELDS(LDO6),
+ .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
+ },
+ {
+ DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
+ DA9063_LDO_COMMON_FIELDS(LDO7),
+ .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
+ .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
+ },
+ {
+ DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
+ DA9063_LDO_COMMON_FIELDS(LDO8),
+ .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
+ .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
+ },
+ {
+ DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
+ DA9063_LDO_COMMON_FIELDS(LDO9),
+ .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
+ },
+ {
+ DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
+ DA9063_LDO_COMMON_FIELDS(LDO10),
+ .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
+ },
+ {
+ DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
+ DA9063_LDO_COMMON_FIELDS(LDO11),
+ .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
+ .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
+ },
+ {
+ DA9063_SWITCH(DA9063, 32K_OUT),
+ .desc.enable_reg = DA9063_REG_EN_32K,
+ .desc.enable_mask = DA9063_OUT_32K_EN,
+ },
+};
+
+/* Link chip model with regulators info table */
+static struct da9063_dev_model regulators_models[] = {
+ {
+ .regulator_info = da9063_regulator_info,
+ .n_regulators = ARRAY_SIZE(da9063_regulator_info),
+ .dev_model = PMIC_DA9063,
+ },
+ { }
+};
+
+/*
+ * Regulator internal functions
+ */
+static int da9063_update_mode_internal(struct da9063_regulator *regl,
+ int sys_state)
+{
+ const struct da9063_regulator_info *rinfo = regl->info;
+ unsigned val;
+ unsigned mode;
+ int ret;
+
+ if (sys_state == SYS_STATE_SUSPEND)
+ /* Get mode for regulator in suspend state */
+ mode = regl->suspend_mode;
+ else
+ /* Get mode for regulator in normal operation */
+ mode = regl->mode;
+
+ /* LDOs use sleep flags - one for normal and one for suspend state.
+ For BUCKs single mode register field is used in normal and
+ suspend state. */
+ if (rinfo->mode.addr) {
+ /* Set mode for BUCK - 3 modes are supported */
+ switch (mode) {
+ case REGULATOR_MODE_FAST:
+ val = BUCK_MODE_SYNC;
+ break;
+ case REGULATOR_MODE_NORMAL:
+ val = BUCK_MODE_AUTO;
+ break;
+ case REGULATOR_MODE_STANDBY:
+ val = BUCK_MODE_SLEEP;
+ break;
+ default:
+ return -EINVAL;
+ }
+ val = val << rinfo->mode.shift;
+
+ ret = regmap_update_bits(regl->hw->regmap, rinfo->mode.addr,
+ rinfo->mode.mask, val);
+ } else {
+ /* Set mode for LDO - 2 modes are supported */
+ switch (mode) {
+ case REGULATOR_MODE_NORMAL:
+ val = 0;
+ break;
+ case REGULATOR_MODE_STANDBY:
+ val = DA9063_LDO_SL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (sys_state == SYS_STATE_SUSPEND) {
+ if (!rinfo->suspend_sleep.addr)
+ return -EINVAL;
+ ret = regmap_update_bits(regl->hw->regmap,
+ rinfo->suspend_sleep.addr,
+ rinfo->suspend_sleep.mask,
+ val);
+ } else {
+ if (!rinfo->sleep.addr)
+ return -EINVAL;
+ ret = regmap_update_bits(regl->hw->regmap,
+ rinfo->sleep.addr,
+ rinfo->sleep.mask, val);
+ }
+ }
+
+ return ret;
+}
+
+static unsigned da9063_get_mode_internal(struct da9063_regulator *regl,
+ int sys_state)
+{
+ const struct da9063_regulator_info *rinfo = regl->info;
+ int addr, mask, ret, val;
+ unsigned mode = 0;
+
+ /* Bucks use single mode register field for normal operation
+ and suspend state. LDOs use sleep flags - one for normal
+ and one for suspend state. */
+ if (rinfo->mode.addr) {
+ /* For BUCKs, there are 3 modes to map to */
+ ret = regmap_read(regl->hw->regmap, rinfo->mode.addr, &val);
+ if (ret < 0)
+ return ret;
+
+ val = (val & rinfo->mode.mask) >> rinfo->mode.shift;
+ switch (val) {
+ default:
+ case BUCK_MODE_MANUAL:
+ mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
+ /* Sleep flag bit decides the mode */
+ break;
+ case BUCK_MODE_SLEEP:
+ return REGULATOR_MODE_STANDBY;
+ case BUCK_MODE_SYNC:
+ return REGULATOR_MODE_FAST;
+ case BUCK_MODE_AUTO:
+ return REGULATOR_MODE_NORMAL;
+ }
+ } else if (rinfo->sleep.addr) {
+ /* For LDOs there are 2 modes to map to */
+ mode = REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
+ /* Sleep flag bit decides the mode */
+ } else {
+ /* No support */
+ return 0;
+ }
+
+ /* If sys_state == SYS_STATE_CURRENT, current regulator state
+ is detected. */
+ if (sys_state == SYS_STATE_CURRENT && rinfo->suspend.addr) {
+ ret = regmap_read(regl->hw->regmap, rinfo->suspend.addr, &val);
+ if (ret < 0)
+ return ret;
+
+ if (val & rinfo->suspend.mask)
+ sys_state = SYS_STATE_SUSPEND;
+ else
+ sys_state = SYS_STATE_NORMAL;
+ }
+
+ /* Read regulator mode from proper register,
+ depending on selected system state */
+ if (sys_state == SYS_STATE_SUSPEND && rinfo->suspend_sleep.addr) {
+ addr = rinfo->suspend_sleep.addr;
+ mask = rinfo->suspend_sleep.mask;
+ } else {
+ addr = rinfo->sleep.addr;
+ mask = rinfo->sleep.mask;
+ }
+
+ ret = regmap_read(regl->hw->regmap, addr, &val);
+ if (ret < 0)
+ return ret;
+
+ if (val & mask)
+ mode &= REGULATOR_MODE_STANDBY;
+ else
+ mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
+
+ return mode;
+}
+
+static int da9063_set_current_limit(struct regulator_dev *rdev,
+ int min_uA, int max_uA)
+{
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+ const struct da9063_regulator_info *rinfo = regl->info;
+ int val = INT_MAX;
+ unsigned sel = 0;
+ int n;
+ int tval;
+
+ if (!rinfo->current_limits)
+ return -EINVAL;
+
+ for (n = 0; n < rinfo->n_current_limits; n++) {
+ tval = rinfo->current_limits[n];
+ if (tval >= min_uA && tval <= max_uA && val > tval) {
+ val = tval;
+ sel = n;
+ }
+ }
+ if (val == INT_MAX)
+ return -EINVAL;
+
+ sel = (sel + rinfo->ilimit.offset) << rinfo->ilimit.shift;
+ return regmap_update_bits(regl->hw->regmap, rinfo->ilimit.addr,
+ rinfo->ilimit.mask, sel);
+}
+
+static int da9063_get_current_limit(struct regulator_dev *rdev)
+{
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+ const struct da9063_regulator_info *rinfo = regl->info;
+ int ret, sel;
+
+ ret = regmap_read(regl->hw->regmap, rinfo->ilimit.addr, &sel);
+ if (ret < 0)
+ return ret;
+
+ sel = (sel & rinfo->ilimit.mask) >> rinfo->ilimit.shift;
+ sel -= rinfo->ilimit.offset;
+ if (sel < 0)
+ sel = 0;
+ if (sel >= rinfo->n_current_limits)
+ sel = rinfo->n_current_limits - 1;
+
+ return rinfo->current_limits[sel];
+}
+
+static int da9063_enable(struct regulator_dev *rdev)
+{
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+ int ret;
+
+ if (regl->info->suspend.mask) {
+ /* Make sure to exit from suspend mode on enable */
+ ret = regmap_update_bits(regl->hw->regmap,
+ regl->info->suspend.addr,
+ regl->info->suspend.mask, 0);
+ if (ret < 0)
+ return ret;
+
+ /* BUCKs need mode update after wake-up from suspend state. */
+ ret = da9063_update_mode_internal(regl, SYS_STATE_NORMAL);
+ if (ret < 0)
+ return ret;
+ }
+
+ return regulator_enable_regmap(rdev);
+}
+
+static int da9063_set_mode(struct regulator_dev *rdev, unsigned mode)
+{
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+ unsigned orig_mode = regl->mode;
+ int ret;
+
+ regl->mode = mode;
+ ret = da9063_update_mode_internal(regl, SYS_STATE_NORMAL);
+ if (ret)
+ regl->mode = orig_mode;
+
+ return ret;
+}
+
+static unsigned da9063_get_mode(struct regulator_dev *rdev)
+{
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+
+ return da9063_get_mode_internal(regl, SYS_STATE_CURRENT);
+}
+
+static int da9063_get_status(struct regulator_dev *rdev)
+{
+ int ret = regulator_is_enabled_regmap(rdev);
+
+ if (ret == 0) {
+ ret = REGULATOR_STATUS_OFF;
+ } else if (ret > 0) {
+ ret = da9063_get_mode(rdev);
+ if (ret > 0)
+ ret = regulator_mode_to_status(ret);
+ else if (ret == 0)
+ ret = -EIO;
+ }
+
+ return ret;
+}
+
+static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
+{
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+ const struct da9063_regulator_info *rinfo = regl->info;
+ int ret, sel;
+
+ sel = regulator_map_voltage_linear(rdev, uV, uV);
+ if (sel < 0)
+ return -EINVAL;
+
+ sel <<= ffs(rdev->desc->vsel_mask) - 1;
+
+ ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
+ rdev->desc->vsel_mask, sel);
+
+ return ret;
+}
+
+static int da9063_suspend_enable(struct regulator_dev *rdev)
+{
+ int ret;
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+ const struct bfield *bsuspend = &regl->info->suspend;
+
+ ret = regmap_update_bits(regl->hw->regmap, bsuspend->addr,
+ bsuspend->mask, bsuspend->mask);
+ return ret;
+}
+
+static int da9063_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
+{
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+ int ret;
+
+ regl->suspend_mode = mode;
+ ret = da9063_update_mode_internal(regl, SYS_STATE_SUSPEND);
+ return ret;
+}
+
+/* Regulator interrupt handlers */
+irqreturn_t da9063_ldo_lim_event(int irq, void *data)
+{
+ struct da9063_regulators *regulators = data;
+ struct da9063 *hw = regulators->regulator[0].hw;
+ struct da9063_regulator *regl;
+ int bits, i , ret;
+
+ ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
+ if (ret < 0)
+ return IRQ_NONE;
+
+ for (i = regulators->n_regulators - 1; i >= 0; i--) {
+ regl = &regulators->regulator[i];
+ if (regl->info->oc_event.addr != DA9063_REG_STATUS_D)
+ continue;
+
+ if (regl->info->oc_event.mask & bits)
+ regulator_notifier_call_chain(regl->rdev,
+ REGULATOR_EVENT_OVER_CURRENT, NULL);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Probing and Initialisation functions
+ */
+static const struct da9063_regulator_info *
+da9063_get_regl_info(const struct da9063 *da9063,
+ const struct da9063_dev_model *model, int id)
+{
+ int m;
+
+ for (m = model->n_regulators - 1;
+ model->regulator_info[m].desc.id != id; m--) {
+ if (m <= 0)
+ return NULL;
+ }
+ return &model->regulator_info[m];
+}
+
+#ifdef CONFIG_OF
+static struct of_regulator_match da9063_matches[] = {
+ [DA9063_ID_BCORE1] = { .name = "bcore1" },
+ [DA9063_ID_BCORE2] = { .name = "bcore2" },
+ [DA9063_ID_BPRO] = { .name = "bpro", },
+ [DA9063_ID_BMEM] = { .name = "bmem", },
+ [DA9063_ID_BIO] = { .name = "bio", },
+ [DA9063_ID_BPERI] = { .name = "bperi", },
+ [DA9063_ID_BCORES_MERGED] = { .name = "bcores-merged" },
+ [DA9063_ID_BMEM_BIO_MERGED] = { .name = "bmem-bio-merged", },
+ [DA9063_ID_LDO1] = { .name = "ldo1", },
+ [DA9063_ID_LDO2] = { .name = "ldo2", },
+ [DA9063_ID_LDO3] = { .name = "ldo3", },
+ [DA9063_ID_LDO4] = { .name = "ldo4", },
+ [DA9063_ID_LDO5] = { .name = "ldo5", },
+ [DA9063_ID_LDO6] = { .name = "ldo6", },
+ [DA9063_ID_LDO7] = { .name = "ldo7", },
+ [DA9063_ID_LDO8] = { .name = "ldo8", },
+ [DA9063_ID_LDO9] = { .name = "ldo9", },
+ [DA9063_ID_LDO10] = { .name = "ldo10", },
+ [DA9063_ID_LDO11] = { .name = "ldo11", },
+ [DA9063_ID_32K_OUT] = { .name = "32k-out", },
+};
+
+static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
+ struct platform_device *pdev,
+ struct of_regulator_match **da9063_reg_matches)
+{
+ struct da9063_regulators_pdata *pdata;
+ struct da9063_regulator_data *rdata;
+ struct device_node *node;
+ int i, n, num;
+
+ node = of_find_node_by_name(pdev->dev.parent->of_node, "regulators");
+ if (!node) {
+ dev_err(&pdev->dev, "Regulators device node not found\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ num = of_regulator_match(&pdev->dev, node, da9063_matches,
+ ARRAY_SIZE(da9063_matches));
+ if (num < 0) {
+ dev_err(&pdev->dev, "Failed to match regulators\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->regulator_data = devm_kzalloc(&pdev->dev,
+ num * sizeof(*pdata->regulator_data),
+ GFP_KERNEL);
+ if (!pdata->regulator_data)
+ return ERR_PTR(-ENOMEM);
+ pdata->n_regulators = num;
+
+ n = 0;
+ for (i = 0; i < ARRAY_SIZE(da9063_matches); i++) {
+ if (!da9063_matches[i].init_data)
+ continue;
+
+ rdata = &pdata->regulator_data[n];
+ rdata->id = i;
+ rdata->initdata = da9063_matches[i].init_data;
+
+ n++;
+ };
+
+ *da9063_reg_matches = da9063_matches;
+ return pdata;
+}
+#else
+static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
+ struct platform_device *pdev,
+ struct of_regulator_match **da9063_reg_matches)
+{
+ da9063_reg_matches = NULL;
+ return PTR_ERR(-ENODEV);
+}
+#endif
+
+static int da9063_regulator_probe(struct platform_device *pdev)
+{
+ struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
+ struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
+ struct of_regulator_match *da9063_reg_matches;
+ struct da9063_regulators_pdata *regl_pdata;
+ struct da9063_regulator_data *rdata;
+ const struct da9063_dev_model *model;
+ struct da9063_regulators *regulators;
+ struct da9063_regulator *regl;
+ struct regulator_config config;
+ bool bcores_merged, bmem_bio_merged;
+ int irq, n, ret, val;
+ size_t size;
+
+ regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
+
+ if (!regl_pdata)
+ regl_pdata = da9063_parse_regulators_dt(pdev,
+ &da9063_reg_matches);
+
+ if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
+ dev_err(&pdev->dev,
+ "No regulators defined for the platform\n");
+ return PTR_ERR(regl_pdata);
+ }
+
+ /* Find regulators set for particular device model */
+ for (model = regulators_models; model->regulator_info; model++) {
+ if (model->dev_model == da9063_model(da9063))
+ break;
+ }
+ if (!model->regulator_info) {
+ dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
+ da9063_model(da9063));
+ return -ENODEV;
+ }
+
+ ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "Error while reading BUCKs configuration\n");
+ return -EIO;
+ }
+ bcores_merged = val & DA9063_BCORE_MERGE;
+ bmem_bio_merged = val & DA9063_BUCK_MERGE;
+
+ /* Allocate memory required by usable regulators */
+ size = sizeof(struct da9063_regulators) +
+ regl_pdata->n_regulators * sizeof(struct da9063_regulator);
+ regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+ if (!regulators) {
+ dev_err(&pdev->dev, "No memory for regulators\n");
+ return -ENOMEM;
+ }
+
+ regulators->n_regulators = regl_pdata->n_regulators;
+ platform_set_drvdata(pdev, regulators);
+
+ /* Register all regulators declared in platform information */
+ n = 0;
+ while (n < regulators->n_regulators) {
+ rdata = &regl_pdata->regulator_data[n];
+
+ /* Check regulator ID against merge mode configuration */
+ switch (rdata->id) {
+ case DA9063_ID_BCORE1:
+ case DA9063_ID_BCORE2:
+ if (bcores_merged) {
+ dev_err(&pdev->dev,
+ "Cannot use BCORE1 and BCORE2 separately, when in merge mode\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ break;
+ case DA9063_ID_BMEM:
+ case DA9063_ID_BIO:
+ if (bmem_bio_merged) {
+ dev_err(&pdev->dev,
+ "Cannot use BMEM and BIO separately, when in merge mode\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ break;
+ case DA9063_ID_BCORES_MERGED:
+ if (!bcores_merged) {
+ dev_err(&pdev->dev,
+ "BCORE1 and BCORE2 are unavailable in merge mode\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ break;
+ case DA9063_ID_BMEM_BIO_MERGED:
+ if (!bmem_bio_merged) {
+ dev_err(&pdev->dev,
+ "BMEM and BIO are unavailable in merge mode\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ break;
+ }
+
+ /* Initialise regulator structure */
+ regl = &regulators->regulator[n];
+ regl->hw = da9063;
+ regl->info = da9063_get_regl_info(da9063, model, rdata->id);
+ if (!regl->info) {
+ dev_err(&pdev->dev,
+ "Invalid regulator ID in platform data\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ regl->desc = regl->info->desc;
+ regl->desc.type = REGULATOR_VOLTAGE;
+ regl->desc.owner = THIS_MODULE;
+
+ /* Get current modes of operation (A/B voltage selection)
+ for normal and suspend states */
+ ret = da9063_get_mode_internal(regl, SYS_STATE_NORMAL);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "Failed to read %s regulator's mode\n",
+ regl->desc.name);
+ goto err;
+ }
+ if (ret == 0)
+ regl->mode = REGULATOR_MODE_NORMAL;
+ else
+ regl->mode = ret;
+
+ ret = da9063_get_mode_internal(regl, SYS_STATE_SUSPEND);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "Failed to read %s regulator's mode\n",
+ regl->desc.name);
+ goto err;
+ }
+ if (ret == 0)
+ regl->suspend_mode = REGULATOR_MODE_NORMAL;
+ else
+ regl->suspend_mode = ret;
+
+ /* Register regulator */
+ config.dev = &pdev->dev;
+ config.init_data = rdata->initdata;
+ config.driver_data = regl;
+ config.regmap = da9063->regmap;
+ if (da9063_reg_matches)
+ config.of_node = da9063_reg_matches[rdata->id].of_node;
+ regl->rdev = regulator_register(&regl->desc, &config);
+ if (IS_ERR_OR_NULL(regl->rdev)) {
+ dev_err(&pdev->dev,
+ "Failed to register %s regulator\n",
+ regl->desc.name);
+ ret = PTR_ERR(regl->rdev);
+ goto err;
+ }
+ n++;
+ }
+
+ /* LDOs overcurrent event support */
+ irq = platform_get_irq_byname(pdev, "LDO_LIM");
+ if (irq < 0) {
+ ret = irq;
+ dev_err(&pdev->dev, "Failed to get IRQ.\n");
+ goto err;
+ }
+
+ regulators->irq_ldo_lim = regmap_irq_get_virq(da9063->regmap_irq, irq);
+ if (regulators->irq_ldo_lim >= 0) {
+ ret = request_threaded_irq(regulators->irq_ldo_lim,
+ NULL, da9063_ldo_lim_event,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "LDO_LIM", regulators);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to request LDO_LIM IRQ.\n");
+ regulators->irq_ldo_lim = -ENXIO;
+ }
+ }
+
+ return 0;
+
+err:
+ /* Wind back regulators registeration */
+ while (--n >= 0)
+ regulator_unregister(regulators->regulator[n].rdev);
+
+ return ret;
+}
+
+static int da9063_regulator_remove(struct platform_device *pdev)
+{
+ struct da9063_regulators *regulators = platform_get_drvdata(pdev);
+ struct da9063_regulator *regl;
+
+ free_irq(regulators->irq_ldo_lim, regulators);
+ free_irq(regulators->irq_uvov, regulators);
+
+ for (regl = &regulators->regulator[regulators->n_regulators - 1];
+ regl >= &regulators->regulator[0]; regl--)
+ regulator_unregister(regl->rdev);
+
+ return 0;
+}
+
+static struct platform_driver da9063_regulator_driver = {
+ .driver = {
+ .name = DA9063_DRVNAME_REGULATORS,
+ .owner = THIS_MODULE,
+ },
+ .probe = da9063_regulator_probe,
+ .remove = da9063_regulator_remove,
+};
+
+static int __init da9063_regulator_init(void)
+{
+ return platform_driver_register(&da9063_regulator_driver);
+}
+subsys_initcall(da9063_regulator_init);
+
+static void __exit da9063_regulator_cleanup(void)
+{
+ platform_driver_unregister(&da9063_regulator_driver);
+}
+module_exit(da9063_regulator_cleanup);
+
+
+/* Module information */
+MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
+MODULE_DESCRIPTION("DA9063 regulators driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("paltform:" DA9063_DRVNAME_REGULATORS);
--
1.8.3.2


\
 
 \ /
  Last update: 2013-07-24 19:01    [W:0.146 / U:0.932 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site