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Date: Fri, 10 Jun 2011 16:45:31 +0530
From: Ashish Jangam <Ashish.Jangam@...tcummins.com>
To: Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC: "lrg@...mlogic.co.uk" <lrg@...mlogic.co.uk>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
David Dajun Chen <Dajun.Chen@...semi.com>
Subject: [PATCHv2 5/11 ] REGULATOR: Added current_limit functionality for
buck
Hi Mark
current_limit functionality has been added for bucks. Also get_voltage are replaced by get_voltage_sel and dedicated regulator_ops has been added for bucks and ldos.
Signed-off-by: Ashish Jangam <ashish.jangam@...tcummins.com>
Signed-off-by: David Dajun Chen <dchen@...semi.com>
--
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index fa61fe2..ae80461 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -167,6 +167,13 @@ config REGULATOR_DA903X
Say y here to support the BUCKs and LDOs regulators found on
Dialog Semiconductor DA9030/DA9034 PMIC.
+config REGULATOR_DA9052
+ tristate "Dialog DA9052 regulators"
+ depends on PMIC_DA9052
+ help
+ Say y here to support the BUCKs and LDOs regulators found on
+ Dialog Semiconductor DA9052 PMIC.
+
config REGULATOR_PCF50633
tristate "PCF50633 regulator driver"
depends on MFD_PCF50633
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 8cb6d0d..07d340b 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
obj-$(CONFIG_REGULATOR_TPS6586X) += tps6586x-regulator.o
obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
+obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o
obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
new file mode 100755
index 0000000..a15f2ec
--- /dev/null
+++ b/drivers/regulator/da9052-regulator.c
@@ -0,0 +1,551 @@
+/*
+* da9052-regulator.c: Regulator driver for DA9052
+*
+* Copyright(c) 2011 Dialog Semiconductor Ltd.
+*
+*Author: David Dajun Chen <dchen@...semi.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/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+
+#include <linux/mfd/da9052/da9052.h>
+#include <linux/mfd/da9052/reg.h>
+#include <linux/mfd/da9052/pdata.h>
+
+/* Buck step size Macros */
+#define DA9052_BUCK_PERI_3uV_STEP 100000
+#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24
+#define DA9052_CONST_3uV 3000000
+
+/* Buck current limits */
+#define DA9052_BUCK_CURRENT_LIMIT_700mA 0
+#define DA9052_BUCK_CURRENT_LIMIT_800mA 1
+#define DA9052_BUCK_CURRENT_LIMIT_1000mA 2
+#define DA9052_BUCK_CURRENT_LIMIT_1200mA 3
+
+/* Bit masks */
+#define DA9052_BUCK_ILIM_MASK_EVEN 0x3F
+#define DA9052_BUCK_ILIM_MASK_ODD 0xF3
+
+struct da9052_regulator_info {
+ struct regulator_desc reg_desc;
+ int step_uV;
+ int min_uV;
+ int max_uV;
+ unsigned char volt_shift;
+ unsigned char en_bit;
+ unsigned char activate_bit;
+
+};
+
+struct da9052_regulator {
+ struct da9052 *da9052;
+ struct da9052_regulator_info *info;
+ struct regulator_dev *rdev;
+};
+
+static int verify_range(struct da9052_regulator_info *info,
+ int min_uV, int max_uV)
+{
+ if (min_uV < info->min_uV || min_uV > info->max_uV)
+ return -EINVAL;
+ if (max_uV < info->min_uV || max_uV > info->max_uV)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int da9052_regulator_enable(struct regulator_dev *rdev)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int offset = rdev_get_id(rdev);
+
+ return da9052_reg_update(regulator->da9052,
+ DA9052_BUCKCORE_REG + offset,
+ 1 << info->en_bit, 1);
+
+}
+
+static int da9052_regulator_disable(struct regulator_dev *rdev)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int offset = rdev_get_id(rdev);
+
+ return da9052_reg_update(regulator->da9052,
+ DA9052_BUCKCORE_REG + offset,
+ 1 << info->en_bit, 0);
+
+}
+
+static int da9052_regulator_is_enabled(struct regulator_dev *rdev)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int offset = rdev_get_id(rdev);
+ int ret;
+
+ ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
+ if (ret < 0)
+ return ret;
+
+ return ret & (1 << info->en_bit);
+
+}
+
+static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ int offset = rdev_get_id(rdev);
+ int ret;
+
+ ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
+ if (ret < 0)
+ return ret;
+
+/*
+ * Determine the odd or event bit pos of the buck current limit field
+*/
+ if (offset % 2 == 0)
+ ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
+ else
+ ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;
+
+ return ret;
+}
+
+static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
+ int max_uA)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ int offset = rdev_get_id(rdev);
+ int reg_val;
+
+ if (min_uA > 1200000 || max_uA > 1200000)
+ return -EINVAL;
+
+ if (min_uA == 700)
+ reg_val = DA9052_BUCK_CURRENT_LIMIT_700mA;
+ else if (min_uA <= 800)
+ reg_val = DA9052_BUCK_CURRENT_LIMIT_800mA;
+ else if (min_uA <= 1000)
+ reg_val = DA9052_BUCK_CURRENT_LIMIT_1000mA;
+ else if (min_uA <= 1200)
+ reg_val = DA9052_BUCK_CURRENT_LIMIT_1200mA;
+
+/*
+ * Determine the odd or event bit pos of the buck current limit field
+*/
+ if (offset % 2 == 0)
+ return da9052_reg_update(regulator->da9052,
+ DA9052_BUCKA_REG + offset/2,
+ DA9052_BUCK_ILIM_MASK_EVEN,
+ reg_val << 2);
+ else
+ return da9052_reg_update(regulator->da9052,
+ DA9052_BUCKA_REG + offset/2,
+ DA9052_BUCK_ILIM_MASK_ODD,
+ reg_val << 6);
+
+}
+
+static int da9052_list_buckperi_voltage(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int volt_uV;
+
+ if (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV) {
+ volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV) +
+ info->min_uV);
+ volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
+ *(DA9052_BUCK_PERI_3uV_STEP);
+ } else
+ volt_uV = (selector * info->step_uV) + info->min_uV;
+
+ if (volt_uV > info->max_uV)
+ return -EINVAL;
+
+ return volt_uV;
+}
+
+static int da9052_list_voltage(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int volt_uV;
+
+ volt_uV = info->min_uV + info->step_uV * selector;
+
+ if (volt_uV > info->max_uV)
+ return -EINVAL;
+
+ return volt_uV;
+}
+
+static int da9052_regulator_set_voltage_int(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned int *selector)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int offset = rdev_get_id(rdev);
+ int ret;
+
+ ret = verify_range(info, min_uV, max_uV);
+ if (ret < 0)
+ return ret;
+
+ *selector = (min_uV - info->min_uV) / info->step_uV;
+
+ ret = da9052_list_voltage(rdev, *selector);
+ if (ret < 0)
+ return ret;
+
+ return da9052_reg_update(regulator->da9052,
+ DA9052_BUCKCORE_REG + offset,
+ (1 << info->volt_shift) - 1, *selector);
+
+}
+
+static int da9052_set_ldo_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned int *selector)
+{
+ return da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
+
+}
+
+static int da9052_set_ldo5_6_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned int *selector)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int ret;
+
+ ret = da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
+ if (ret < 0)
+ return ret;
+
+/*
+ * Some LD0s are DVC control which requires to activate the regulator bit to
+ * implment the changes on the LDO output.
+*/
+ return da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG, 0,
+ info->activate_bit);
+
+}
+
+static int da9052_set_dcdc_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned int *selector)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int ret;
+
+ ret = da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
+ if (ret < 0)
+ return ret;
+
+/*
+ * Some DCDCs are DVC control which requires to activate the regulator bit to
+ * implment the changes on the DCDC output.
+*/
+ return da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG, 0,
+ info->activate_bit);
+
+}
+
+static int da9052_get_regulator_voltage_sel(struct regulator_dev *rdev)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int offset = rdev_get_id(rdev);
+ int ret;
+
+ ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
+ if (ret < 0)
+ return ret;
+
+ ret &= ((1 << info->volt_shift) - 1);
+
+ return da9052_list_voltage(rdev, ret);
+
+}
+
+static int da9052_set_buckperi_voltage(struct regulator_dev *rdev, int min_uV,
+ int max_uV, unsigned int *selector)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int offset = rdev_get_id(rdev);
+ int ret;
+
+ ret = verify_range(info, min_uV, max_uV);
+ if (ret < 0)
+ return ret;
+
+ if (min_uV >= DA9052_CONST_3uV)
+ *selector = DA9052_CONST_3uV + ((min_uV - DA9052_CONST_3uV) /
+ (DA9052_BUCK_PERI_3uV_STEP));
+ else
+ *selector = (min_uV - info->min_uV) / info->step_uV;
+
+ ret = da9052_list_buckperi_voltage(rdev, *selector);
+ if (ret < 0)
+ return ret;
+
+ return da9052_reg_update(regulator->da9052,
+ DA9052_BUCKCORE_REG + offset,
+ (1 << info->volt_shift) - 1, *selector);
+
+}
+
+static int da9052_get_buckperi_voltage_sel(struct regulator_dev *rdev)
+{
+ struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+ struct da9052_regulator_info *info = regulator->info;
+ int offset = rdev_get_id(rdev);
+ int ret;
+
+ ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
+
+ if (ret < 0)
+ return ret;
+
+ ret &= ((1 << info->volt_shift) - 1);
+
+ return da9052_list_buckperi_voltage(rdev, ret);
+
+}
+
+static struct regulator_ops da9052_buckperi_ops = {
+ .is_enabled = da9052_regulator_is_enabled,
+ .enable = da9052_regulator_enable,
+ .disable = da9052_regulator_disable,
+ .get_current_limit = da9052_dcdc_get_current_limit,
+ .set_current_limit = da9052_dcdc_set_current_limit,
+ .get_voltage_sel = da9052_get_buckperi_voltage_sel,
+ .set_voltage = da9052_set_buckperi_voltage,
+ .list_voltage = da9052_list_buckperi_voltage,
+};
+
+static struct regulator_ops da9052_dcdc_ops = {
+ .is_enabled = da9052_regulator_is_enabled,
+ .enable = da9052_regulator_enable,
+ .disable = da9052_regulator_disable,
+ .get_current_limit = da9052_dcdc_get_current_limit,
+ .set_current_limit = da9052_dcdc_set_current_limit,
+ .get_voltage_sel = da9052_get_regulator_voltage_sel,
+ .set_voltage = da9052_set_dcdc_voltage,
+ .list_voltage = da9052_list_voltage,
+};
+
+static struct regulator_ops da9052_ldo5_6_ops = {
+ .is_enabled = da9052_regulator_is_enabled,
+ .enable = da9052_regulator_enable,
+ .disable = da9052_regulator_disable,
+ .get_voltage_sel = da9052_get_regulator_voltage_sel,
+ .set_voltage = da9052_set_ldo5_6_voltage,
+ .list_voltage = da9052_list_voltage,
+};
+
+static struct regulator_ops da9052_ldo_ops = {
+ .is_enabled = da9052_regulator_is_enabled,
+ .enable = da9052_regulator_enable,
+ .disable = da9052_regulator_disable,
+ .get_voltage_sel = da9052_get_regulator_voltage_sel,
+ .set_voltage = da9052_set_ldo_voltage,
+ .list_voltage = da9052_list_voltage,
+};
+
+#define DA9052_LDO5_6(_id, step, min, max, sbits, ebits, abits) \
+{\
+ .reg_desc = {\
+ .name = "LDO" #_id,\
+ .ops = &da9052_ldo5_6_ops,\
+ .type = REGULATOR_VOLTAGE,\
+ .id = _id,\
+ .owner = THIS_MODULE,\
+ },\
+ .min_uV = (min) * 1000,\
+ .max_uV = (max) * 1000,\
+ .step_uV = (step) * 1000,\
+ .volt_shift = (sbits),\
+ .en_bit = (ebits),\
+ .activate_bit = (abits),\
+}
+
+#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
+{\
+ .reg_desc = {\
+ .name = "LDO" #_id,\
+ .ops = &da9052_ldo_ops,\
+ .type = REGULATOR_VOLTAGE,\
+ .id = _id,\
+ .owner = THIS_MODULE,\
+ },\
+ .min_uV = (min) * 1000,\
+ .max_uV = (max) * 1000,\
+ .step_uV = (step) * 1000,\
+ .volt_shift = (sbits),\
+ .en_bit = (ebits),\
+ .activate_bit = (abits),\
+}
+
+#define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \
+{\
+ .reg_desc = {\
+ .name = "BUCK" #_id,\
+ .ops = &da9052_dcdc_ops,\
+ .type = REGULATOR_VOLTAGE,\
+ .id = _id,\
+ .owner = THIS_MODULE,\
+ },\
+ .min_uV = (min) * 1000,\
+ .max_uV = (max) * 1000,\
+ .step_uV = (step) * 1000,\
+ .volt_shift = (sbits),\
+ .en_bit = (ebits),\
+ .activate_bit = (abits),\
+}
+
+#define DA9052_BUCKPERI(_id, step, min, max, sbits, ebits, abits) \
+{\
+ .reg_desc = {\
+ .name = "BUCK" #_id,\
+ .ops = &da9052_buckperi_ops,\
+ .type = REGULATOR_VOLTAGE,\
+ .id = _id,\
+ .owner = THIS_MODULE,\
+ },\
+ .min_uV = (min) * 1000,\
+ .max_uV = (max) * 1000,\
+ .step_uV = (step) * 1000,\
+ .volt_shift = (sbits),\
+ .en_bit = (ebits),\
+ .activate_bit = (abits),\
+}
+
+struct da9052_regulator_info da9052_regulator_info[] = {
+ /* Buck1 - 4*/
+ DA9052_DCDC(0, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
+ DA9052_DCDC(1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
+ DA9052_DCDC(2, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
+ DA9052_BUCKPERI(3, 50, 1800, 3600, 5, 6, 0),
+ /* LD01 - LDO10*/
+ DA9052_LDO(4, 50, 600, 1800, 5, 6, 0),
+ DA9052_LDO5_6(5, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
+ DA9052_LDO5_6(6, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
+ DA9052_LDO(7, 25, 1725, 3300, 6, 6, 0),
+ DA9052_LDO(8, 50, 1200, 3600, 6, 6, 0),
+ DA9052_LDO(9, 50, 1200, 3600, 6, 6, 0),
+ DA9052_LDO(10, 50, 1200, 3600, 6, 6, 0),
+ DA9052_LDO(11, 50, 1200, 3600, 6, 6, 0),
+ DA9052_LDO(12, 50, 1250, 3650, 6, 6, 0),
+ DA9052_LDO(13, 50, 1200, 3600, 6, 6, 0),
+};
+
+
+static inline struct da9052_regulator_info *find_regulator_info(int id)
+{
+ struct da9052_regulator_info *info;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
+ info = &da9052_regulator_info[i];
+ if (info->reg_desc.id == id)
+ return info;
+ }
+ return NULL;
+}
+
+static int __devinit da9052_regulator_probe(struct platform_device *pdev)
+{
+ struct da9052_regulator *regulator;
+ struct da9052 *da9052;
+ struct da9052_pdata *pdata;
+ int ret;
+
+ regulator = kzalloc(sizeof(struct da9052_regulator), GFP_KERNEL);
+ if (!regulator)
+ return -ENOMEM;
+
+ da9052 = dev_get_drvdata(pdev->dev.parent);
+ pdata = da9052->dev->platform_data;
+
+ regulator->info = find_regulator_info(pdev->id);
+ if (regulator->info == NULL) {
+ dev_err(&pdev->dev, "invalid regulator ID specified\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ regulator->rdev = regulator_register(®ulator->info->reg_desc,
+ &pdev->dev,
+ pdata->regulators[pdev->id],
+ regulator);
+ if (IS_ERR(regulator->rdev)) {
+ dev_err(&pdev->dev, "failed to register regulator %s\n",
+ regulator->info->reg_desc.name);
+ ret = PTR_ERR(regulator->rdev);
+ goto err;
+ }
+
+ platform_set_drvdata(pdev, regulator);
+
+ return 0;
+err:
+ kfree(regulator);
+ return ret;
+
+}
+
+static int __devexit da9052_regulator_remove(struct platform_device *pdev)
+{
+ struct da9052_regulator *regulator = platform_get_drvdata(pdev);
+
+ regulator_unregister(regulator->rdev);
+
+ kfree(regulator);
+ return 0;
+}
+
+static struct platform_driver da9052_regulator_driver = {
+ .driver = {
+ .name = "da9052-regulator",
+ .owner = THIS_MODULE,
+ },
+ .probe = da9052_regulator_probe,
+ .remove = __devexit_p(da9052_regulator_remove),
+};
+
+static int __init da9052_regulator_init(void)
+{
+ return platform_driver_register(&da9052_regulator_driver);
+}
+subsys_initcall(da9052_regulator_init);
+
+static void __exit da9052_regulator_exit(void)
+{
+ platform_driver_unregister(&da9052_regulator_driver);
+}
+module_exit(da9052_regulator_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@...semi.com>");
+MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da9052-regulator");
Regards,
Ashish
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