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author | Mark Brown <broonie@sirena.org.uk> | 2013-04-28 01:13:33 (GMT) |
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committer | Mark Brown <broonie@sirena.org.uk> | 2013-04-28 01:13:33 (GMT) |
commit | 9e63d23056c0157ba2ab3a1339a8e69d759b2f34 (patch) | |
tree | c6acb2a9111a6cecd6f1563eefb7139be040f467 /drivers/regulator | |
parent | 78da02186a5a7cd813321ef018a1c6dbaf888722 (diff) | |
parent | 018fd856cee9ebe794da1382ff7fafae64781dc5 (diff) | |
download | linux-9e63d23056c0157ba2ab3a1339a8e69d759b2f34.tar.xz |
Merge remote-tracking branch 'regulator/topic/ab3100' into v3.9-rc8
Diffstat (limited to 'drivers/regulator')
-rw-r--r-- | drivers/regulator/ab3100.c | 236 |
1 files changed, 186 insertions, 50 deletions
diff --git a/drivers/regulator/ab3100.c b/drivers/regulator/ab3100.c index 111ec69..3be9e46 100644 --- a/drivers/regulator/ab3100.c +++ b/drivers/regulator/ab3100.c @@ -17,6 +17,8 @@ #include <linux/regulator/driver.h> #include <linux/mfd/ab3100.h> #include <linux/mfd/abx500.h> +#include <linux/of.h> +#include <linux/regulator/of_regulator.h> /* LDO registers and some handy masking definitions for AB3100 */ #define AB3100_LDO_A 0x40 @@ -345,7 +347,11 @@ static int ab3100_get_voltage_regulator_external(struct regulator_dev *reg) { struct ab3100_regulator *abreg = rdev_get_drvdata(reg); - return abreg->plfdata->external_voltage; + if (abreg->plfdata) + return abreg->plfdata->external_voltage; + else + /* TODO: encode external voltage into device tree */ + return 0; } static struct regulator_ops regulator_ops_fixed = { @@ -488,16 +494,174 @@ ab3100_regulator_desc[AB3100_NUM_REGULATORS] = { }, }; +static int ab3100_regulator_register(struct platform_device *pdev, + struct ab3100_platform_data *plfdata, + struct regulator_init_data *init_data, + struct device_node *np, + int id) +{ + struct regulator_desc *desc; + struct ab3100_regulator *reg; + struct regulator_dev *rdev; + struct regulator_config config = { }; + int err, i; + + for (i = 0; i < AB3100_NUM_REGULATORS; i++) { + desc = &ab3100_regulator_desc[i]; + if (desc->id == id) + break; + } + if (desc->id != id) + return -ENODEV; + + /* Same index used for this array */ + reg = &ab3100_regulators[i]; + + /* + * Initialize per-regulator struct. + * Inherit platform data, this comes down from the + * i2c boarddata, from the machine. So if you want to + * see what it looks like for a certain machine, go + * into the machine I2C setup. + */ + reg->dev = &pdev->dev; + if (plfdata) { + reg->plfdata = plfdata; + config.init_data = &plfdata->reg_constraints[i]; + } else if (np) { + config.of_node = np; + config.init_data = init_data; + } + config.dev = &pdev->dev; + config.driver_data = reg; + + rdev = regulator_register(desc, &config); + if (IS_ERR(rdev)) { + err = PTR_ERR(rdev); + dev_err(&pdev->dev, + "%s: failed to register regulator %s err %d\n", + __func__, desc->name, + err); + return err; + } + + /* Then set a pointer back to the registered regulator */ + reg->rdev = rdev; + return 0; +} + +static struct of_regulator_match ab3100_regulator_matches[] = { + { .name = "ab3100_ldo_a", .driver_data = (void *) AB3100_LDO_A, }, + { .name = "ab3100_ldo_c", .driver_data = (void *) AB3100_LDO_C, }, + { .name = "ab3100_ldo_d", .driver_data = (void *) AB3100_LDO_D, }, + { .name = "ab3100_ldo_e", .driver_data = (void *) AB3100_LDO_E, }, + { .name = "ab3100_ldo_f", .driver_data = (void *) AB3100_LDO_F }, + { .name = "ab3100_ldo_g", .driver_data = (void *) AB3100_LDO_G }, + { .name = "ab3100_ldo_h", .driver_data = (void *) AB3100_LDO_H }, + { .name = "ab3100_ldo_k", .driver_data = (void *) AB3100_LDO_K }, + { .name = "ab3100_ext", .driver_data = (void *) AB3100_LDO_EXT }, + { .name = "ab3100_buck", .driver_data = (void *) AB3100_BUCK }, +}; + /* - * NOTE: the following functions are regulators pluralis - it is the - * binding to the AB3100 core driver and the parent platform device - * for all the different regulators. + * Initial settings of ab3100 registers. + * Common for below LDO regulator settings are that + * bit 7-5 controls voltage. Bit 4 turns regulator ON(1) or OFF(0). + * Bit 3-2 controls sleep enable and bit 1-0 controls sleep mode. */ +/* LDO_A 0x16: 2.75V, ON, SLEEP_A, SLEEP OFF GND */ +#define LDO_A_SETTING 0x16 +/* LDO_C 0x10: 2.65V, ON, SLEEP_A or B, SLEEP full power */ +#define LDO_C_SETTING 0x10 +/* LDO_D 0x10: 2.65V, ON, sleep mode not used */ +#define LDO_D_SETTING 0x10 +/* LDO_E 0x10: 1.8V, ON, SLEEP_A or B, SLEEP full power */ +#define LDO_E_SETTING 0x10 +/* LDO_E SLEEP 0x00: 1.8V, not used, SLEEP_A or B, not used */ +#define LDO_E_SLEEP_SETTING 0x00 +/* LDO_F 0xD0: 2.5V, ON, SLEEP_A or B, SLEEP full power */ +#define LDO_F_SETTING 0xD0 +/* LDO_G 0x00: 2.85V, OFF, SLEEP_A or B, SLEEP full power */ +#define LDO_G_SETTING 0x00 +/* LDO_H 0x18: 2.75V, ON, SLEEP_B, SLEEP full power */ +#define LDO_H_SETTING 0x18 +/* LDO_K 0x00: 2.75V, OFF, SLEEP_A or B, SLEEP full power */ +#define LDO_K_SETTING 0x00 +/* LDO_EXT 0x00: Voltage not set, OFF, not used, not used */ +#define LDO_EXT_SETTING 0x00 +/* BUCK 0x7D: 1.2V, ON, SLEEP_A and B, SLEEP low power */ +#define BUCK_SETTING 0x7D +/* BUCK SLEEP 0xAC: 1.05V, Not used, SLEEP_A and B, Not used */ +#define BUCK_SLEEP_SETTING 0xAC + +static const u8 ab3100_reg_initvals[] = { + LDO_A_SETTING, + LDO_C_SETTING, + LDO_E_SETTING, + LDO_E_SLEEP_SETTING, + LDO_F_SETTING, + LDO_G_SETTING, + LDO_H_SETTING, + LDO_K_SETTING, + LDO_EXT_SETTING, + BUCK_SETTING, + BUCK_SLEEP_SETTING, + LDO_D_SETTING, +}; + +static int ab3100_regulators_remove(struct platform_device *pdev) +{ + int i; + + for (i = 0; i < AB3100_NUM_REGULATORS; i++) { + struct ab3100_regulator *reg = &ab3100_regulators[i]; + + regulator_unregister(reg->rdev); + reg->rdev = NULL; + } + return 0; +} + +static int +ab3100_regulator_of_probe(struct platform_device *pdev, struct device_node *np) +{ + int err, i; + + /* + * Set up the regulator registers, as was previously done with + * platform data. + */ + /* Set up regulators */ + for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) { + err = abx500_set_register_interruptible(&pdev->dev, 0, + ab3100_reg_init_order[i], + ab3100_reg_initvals[i]); + if (err) { + dev_err(&pdev->dev, "regulator initialization failed with error %d\n", + err); + return err; + } + } + + for (i = 0; i < ARRAY_SIZE(ab3100_regulator_matches); i++) { + err = ab3100_regulator_register( + pdev, NULL, ab3100_regulator_matches[i].init_data, + ab3100_regulator_matches[i].of_node, + (int) ab3100_regulator_matches[i].driver_data); + if (err) { + ab3100_regulators_remove(pdev); + return err; + } + } + + return 0; +} + static int ab3100_regulators_probe(struct platform_device *pdev) { struct ab3100_platform_data *plfdata = pdev->dev.platform_data; - struct regulator_config config = { }; + struct device_node *np = pdev->dev.of_node; int err = 0; u8 data; int i; @@ -516,6 +680,18 @@ static int ab3100_regulators_probe(struct platform_device *pdev) dev_notice(&pdev->dev, "chip is in inactive mode (Cold start)\n"); + if (np) { + err = of_regulator_match(&pdev->dev, np, + ab3100_regulator_matches, + ARRAY_SIZE(ab3100_regulator_matches)); + if (err < 0) { + dev_err(&pdev->dev, + "Error parsing regulator init data: %d\n", err); + return err; + } + return ab3100_regulator_of_probe(pdev, np); + } + /* Set up regulators */ for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) { err = abx500_set_register_interruptible(&pdev->dev, 0, @@ -530,59 +706,19 @@ static int ab3100_regulators_probe(struct platform_device *pdev) /* Register the regulators */ for (i = 0; i < AB3100_NUM_REGULATORS; i++) { - struct ab3100_regulator *reg = &ab3100_regulators[i]; - struct regulator_dev *rdev; - - /* - * Initialize per-regulator struct. - * Inherit platform data, this comes down from the - * i2c boarddata, from the machine. So if you want to - * see what it looks like for a certain machine, go - * into the machine I2C setup. - */ - reg->dev = &pdev->dev; - reg->plfdata = plfdata; + struct regulator_desc *desc = &ab3100_regulator_desc[i]; - config.dev = &pdev->dev; - config.driver_data = reg; - config.init_data = &plfdata->reg_constraints[i]; - - /* - * Register the regulator, pass around - * the ab3100_regulator struct - */ - rdev = regulator_register(&ab3100_regulator_desc[i], &config); - if (IS_ERR(rdev)) { - err = PTR_ERR(rdev); - dev_err(&pdev->dev, - "%s: failed to register regulator %s err %d\n", - __func__, ab3100_regulator_desc[i].name, - err); - /* remove the already registered regulators */ - while (--i >= 0) - regulator_unregister(ab3100_regulators[i].rdev); + err = ab3100_regulator_register(pdev, plfdata, NULL, NULL, + desc->id); + if (err) { + ab3100_regulators_remove(pdev); return err; } - - /* Then set a pointer back to the registered regulator */ - reg->rdev = rdev; } return 0; } -static int ab3100_regulators_remove(struct platform_device *pdev) -{ - int i; - - for (i = 0; i < AB3100_NUM_REGULATORS; i++) { - struct ab3100_regulator *reg = &ab3100_regulators[i]; - - regulator_unregister(reg->rdev); - } - return 0; -} - static struct platform_driver ab3100_regulators_driver = { .driver = { .name = "ab3100-regulators", |