diff options
Diffstat (limited to 'drivers/regulator/ab3100.c')
| -rw-r--r-- | drivers/regulator/ab3100.c | 407 |
1 files changed, 233 insertions, 174 deletions
diff --git a/drivers/regulator/ab3100.c b/drivers/regulator/ab3100.c index b349266a43d..e10febe9ec3 100644 --- a/drivers/regulator/ab3100.c +++ b/drivers/regulator/ab3100.c @@ -13,10 +13,12 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/err.h> -#include <linux/delay.h> #include <linux/platform_device.h> #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 @@ -44,20 +46,12 @@ * @dev: handle to the device * @plfdata: AB3100 platform data passed in at probe time * @regreg: regulator register number in the AB3100 - * @fixed_voltage: a fixed voltage for this regulator, if this - * 0 the voltages array is used instead. - * @typ_voltages: an array of available typical voltages for - * this regulator - * @voltages_len: length of the array of available voltages */ struct ab3100_regulator { struct regulator_dev *rdev; struct device *dev; struct ab3100_platform_data *plfdata; u8 regreg; - int fixed_voltage; - int const *typ_voltages; - u8 voltages_len; }; /* The order in which registers are initialized */ @@ -81,7 +75,7 @@ static const u8 ab3100_reg_init_order[AB3100_NUM_REGULATORS+2] = { #define LDO_C_VOLTAGE 2650000 #define LDO_D_VOLTAGE 2650000 -static const int ldo_e_buck_typ_voltages[] = { +static const unsigned int ldo_e_buck_typ_voltages[] = { 1800000, 1400000, 1300000, @@ -91,7 +85,7 @@ static const int ldo_e_buck_typ_voltages[] = { 900000, }; -static const int ldo_f_typ_voltages[] = { +static const unsigned int ldo_f_typ_voltages[] = { 1800000, 1400000, 1300000, @@ -102,21 +96,21 @@ static const int ldo_f_typ_voltages[] = { 2650000, }; -static const int ldo_g_typ_voltages[] = { +static const unsigned int ldo_g_typ_voltages[] = { 2850000, 2750000, 1800000, 1500000, }; -static const int ldo_h_typ_voltages[] = { +static const unsigned int ldo_h_typ_voltages[] = { 2750000, 1800000, 1500000, 1200000, }; -static const int ldo_k_typ_voltages[] = { +static const unsigned int ldo_k_typ_voltages[] = { 2750000, 1800000, }; @@ -127,40 +121,27 @@ static struct ab3100_regulator ab3100_regulators[AB3100_NUM_REGULATORS] = { { .regreg = AB3100_LDO_A, - .fixed_voltage = LDO_A_VOLTAGE, }, { .regreg = AB3100_LDO_C, - .fixed_voltage = LDO_C_VOLTAGE, }, { .regreg = AB3100_LDO_D, - .fixed_voltage = LDO_D_VOLTAGE, }, { .regreg = AB3100_LDO_E, - .typ_voltages = ldo_e_buck_typ_voltages, - .voltages_len = ARRAY_SIZE(ldo_e_buck_typ_voltages), }, { .regreg = AB3100_LDO_F, - .typ_voltages = ldo_f_typ_voltages, - .voltages_len = ARRAY_SIZE(ldo_f_typ_voltages), }, { .regreg = AB3100_LDO_G, - .typ_voltages = ldo_g_typ_voltages, - .voltages_len = ARRAY_SIZE(ldo_g_typ_voltages), }, { .regreg = AB3100_LDO_H, - .typ_voltages = ldo_h_typ_voltages, - .voltages_len = ARRAY_SIZE(ldo_h_typ_voltages), }, { .regreg = AB3100_LDO_K, - .typ_voltages = ldo_k_typ_voltages, - .voltages_len = ARRAY_SIZE(ldo_k_typ_voltages), }, { .regreg = AB3100_LDO_EXT, @@ -168,8 +149,6 @@ ab3100_regulators[AB3100_NUM_REGULATORS] = { }, { .regreg = AB3100_BUCK, - .typ_voltages = ldo_e_buck_typ_voltages, - .voltages_len = ARRAY_SIZE(ldo_e_buck_typ_voltages), }, }; @@ -179,7 +158,7 @@ ab3100_regulators[AB3100_NUM_REGULATORS] = { */ static int ab3100_enable_regulator(struct regulator_dev *reg) { - struct ab3100_regulator *abreg = reg->reg_data; + struct ab3100_regulator *abreg = rdev_get_drvdata(reg); int err; u8 regval; @@ -205,35 +184,12 @@ static int ab3100_enable_regulator(struct regulator_dev *reg) return err; } - /* Per-regulator power on delay from spec */ - switch (abreg->regreg) { - case AB3100_LDO_A: /* Fallthrough */ - case AB3100_LDO_C: /* Fallthrough */ - case AB3100_LDO_D: /* Fallthrough */ - case AB3100_LDO_E: /* Fallthrough */ - case AB3100_LDO_H: /* Fallthrough */ - case AB3100_LDO_K: - udelay(200); - break; - case AB3100_LDO_F: - udelay(600); - break; - case AB3100_LDO_G: - udelay(400); - break; - case AB3100_BUCK: - mdelay(1); - break; - default: - break; - } - return 0; } static int ab3100_disable_regulator(struct regulator_dev *reg) { - struct ab3100_regulator *abreg = reg->reg_data; + struct ab3100_regulator *abreg = rdev_get_drvdata(reg); int err; u8 regval; @@ -266,7 +222,7 @@ static int ab3100_disable_regulator(struct regulator_dev *reg) static int ab3100_is_enabled_regulator(struct regulator_dev *reg) { - struct ab3100_regulator *abreg = reg->reg_data; + struct ab3100_regulator *abreg = rdev_get_drvdata(reg); u8 regval; int err; @@ -281,26 +237,12 @@ static int ab3100_is_enabled_regulator(struct regulator_dev *reg) return regval & AB3100_REG_ON_MASK; } -static int ab3100_list_voltage_regulator(struct regulator_dev *reg, - unsigned selector) -{ - struct ab3100_regulator *abreg = reg->reg_data; - - if (selector >= abreg->voltages_len) - return -EINVAL; - return abreg->typ_voltages[selector]; -} - static int ab3100_get_voltage_regulator(struct regulator_dev *reg) { - struct ab3100_regulator *abreg = reg->reg_data; + struct ab3100_regulator *abreg = rdev_get_drvdata(reg); u8 regval; int err; - /* Return the voltage for fixed regulators immediately */ - if (abreg->fixed_voltage) - return abreg->fixed_voltage; - /* * For variable types, read out setting and index into * supplied voltage list. @@ -318,60 +260,22 @@ static int ab3100_get_voltage_regulator(struct regulator_dev *reg) regval &= 0xE0; regval >>= 5; - if (regval >= abreg->voltages_len) { + if (regval >= reg->desc->n_voltages) { dev_err(®->dev, "regulator register %02x contains an illegal voltage setting\n", abreg->regreg); return -EINVAL; } - return abreg->typ_voltages[regval]; -} - -static int ab3100_get_best_voltage_index(struct regulator_dev *reg, - int min_uV, int max_uV) -{ - struct ab3100_regulator *abreg = reg->reg_data; - int i; - int bestmatch; - int bestindex; - - /* - * Locate the minimum voltage fitting the criteria on - * this regulator. The switchable voltages are not - * in strict falling order so we need to check them - * all for the best match. - */ - bestmatch = INT_MAX; - bestindex = -1; - for (i = 0; i < abreg->voltages_len; i++) { - if (abreg->typ_voltages[i] <= max_uV && - abreg->typ_voltages[i] >= min_uV && - abreg->typ_voltages[i] < bestmatch) { - bestmatch = abreg->typ_voltages[i]; - bestindex = i; - } - } - - if (bestindex < 0) { - dev_warn(®->dev, "requested %d<=x<=%d uV, out of range!\n", - min_uV, max_uV); - return -EINVAL; - } - return bestindex; + return reg->desc->volt_table[regval]; } -static int ab3100_set_voltage_regulator(struct regulator_dev *reg, - int min_uV, int max_uV) +static int ab3100_set_voltage_regulator_sel(struct regulator_dev *reg, + unsigned selector) { - struct ab3100_regulator *abreg = reg->reg_data; + struct ab3100_regulator *abreg = rdev_get_drvdata(reg); u8 regval; int err; - int bestindex; - - bestindex = ab3100_get_best_voltage_index(reg, min_uV, max_uV); - if (bestindex < 0) - return bestindex; err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg, ®val); @@ -384,7 +288,7 @@ static int ab3100_set_voltage_regulator(struct regulator_dev *reg, /* The highest three bits control the variable regulators */ regval &= ~0xE0; - regval |= (bestindex << 5); + regval |= (selector << 5); err = abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg, regval); @@ -398,7 +302,7 @@ static int ab3100_set_voltage_regulator(struct regulator_dev *reg, static int ab3100_set_suspend_voltage_regulator(struct regulator_dev *reg, int uV) { - struct ab3100_regulator *abreg = reg->reg_data; + struct ab3100_regulator *abreg = rdev_get_drvdata(reg); u8 regval; int err; int bestindex; @@ -412,7 +316,7 @@ static int ab3100_set_suspend_voltage_regulator(struct regulator_dev *reg, return -EINVAL; /* LDO E and BUCK have special suspend voltages you can set */ - bestindex = ab3100_get_best_voltage_index(reg, uV, uV); + bestindex = regulator_map_voltage_iterate(reg, uV, uV); err = abx500_get_register_interruptible(abreg->dev, 0, targetreg, ®val); @@ -441,16 +345,20 @@ static int ab3100_set_suspend_voltage_regulator(struct regulator_dev *reg, */ static int ab3100_get_voltage_regulator_external(struct regulator_dev *reg) { - struct ab3100_regulator *abreg = reg->reg_data; + 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 = { + .list_voltage = regulator_list_voltage_linear, .enable = ab3100_enable_regulator, .disable = ab3100_disable_regulator, .is_enabled = ab3100_is_enabled_regulator, - .get_voltage = ab3100_get_voltage_regulator, }; static struct regulator_ops regulator_ops_variable = { @@ -458,8 +366,8 @@ static struct regulator_ops regulator_ops_variable = { .disable = ab3100_disable_regulator, .is_enabled = ab3100_is_enabled_regulator, .get_voltage = ab3100_get_voltage_regulator, - .set_voltage = ab3100_set_voltage_regulator, - .list_voltage = ab3100_list_voltage_regulator, + .set_voltage_sel = ab3100_set_voltage_regulator_sel, + .list_voltage = regulator_list_voltage_table, }; static struct regulator_ops regulator_ops_variable_sleepable = { @@ -467,9 +375,9 @@ static struct regulator_ops regulator_ops_variable_sleepable = { .disable = ab3100_disable_regulator, .is_enabled = ab3100_is_enabled_regulator, .get_voltage = ab3100_get_voltage_regulator, - .set_voltage = ab3100_set_voltage_regulator, + .set_voltage_sel = ab3100_set_voltage_regulator_sel, .set_suspend_voltage = ab3100_set_suspend_voltage_regulator, - .list_voltage = ab3100_list_voltage_regulator, + .list_voltage = regulator_list_voltage_table, }; /* @@ -491,62 +399,81 @@ ab3100_regulator_desc[AB3100_NUM_REGULATORS] = { .name = "LDO_A", .id = AB3100_LDO_A, .ops = ®ulator_ops_fixed, + .n_voltages = 1, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, + .min_uV = LDO_A_VOLTAGE, + .enable_time = 200, }, { .name = "LDO_C", .id = AB3100_LDO_C, .ops = ®ulator_ops_fixed, + .n_voltages = 1, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, + .min_uV = LDO_C_VOLTAGE, + .enable_time = 200, }, { .name = "LDO_D", .id = AB3100_LDO_D, .ops = ®ulator_ops_fixed, + .n_voltages = 1, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, + .min_uV = LDO_D_VOLTAGE, + .enable_time = 200, }, { .name = "LDO_E", .id = AB3100_LDO_E, .ops = ®ulator_ops_variable_sleepable, .n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages), + .volt_table = ldo_e_buck_typ_voltages, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, + .enable_time = 200, }, { .name = "LDO_F", .id = AB3100_LDO_F, .ops = ®ulator_ops_variable, .n_voltages = ARRAY_SIZE(ldo_f_typ_voltages), + .volt_table = ldo_f_typ_voltages, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, + .enable_time = 600, }, { .name = "LDO_G", .id = AB3100_LDO_G, .ops = ®ulator_ops_variable, .n_voltages = ARRAY_SIZE(ldo_g_typ_voltages), + .volt_table = ldo_g_typ_voltages, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, + .enable_time = 400, }, { .name = "LDO_H", .id = AB3100_LDO_H, .ops = ®ulator_ops_variable, .n_voltages = ARRAY_SIZE(ldo_h_typ_voltages), + .volt_table = ldo_h_typ_voltages, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, + .enable_time = 200, }, { .name = "LDO_K", .id = AB3100_LDO_K, .ops = ®ulator_ops_variable, .n_voltages = ARRAY_SIZE(ldo_k_typ_voltages), + .volt_table = ldo_k_typ_voltages, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, + .enable_time = 200, }, { .name = "LDO_EXT", @@ -560,20 +487,180 @@ ab3100_regulator_desc[AB3100_NUM_REGULATORS] = { .id = AB3100_BUCK, .ops = ®ulator_ops_variable_sleepable, .n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages), + .volt_table = ldo_e_buck_typ_voltages, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, + .enable_time = 1000, }, }; +static int ab3100_regulator_register(struct platform_device *pdev, + struct ab3100_platform_data *plfdata, + struct regulator_init_data *init_data, + struct device_node *np, + unsigned long 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 = devm_regulator_register(&pdev->dev, 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]; -static int __devinit ab3100_regulators_probe(struct platform_device *pdev) + reg->rdev = NULL; + } + return 0; +} + +static int +ab3100_regulator_of_probe(struct platform_device *pdev, struct device_node *np) { - struct ab3100_platform_data *plfdata = pdev->dev.platform_data; + 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, + (unsigned long)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 = dev_get_platdata(&pdev->dev); + struct device_node *np = pdev->dev.of_node; int err = 0; u8 data; int i; @@ -592,6 +679,18 @@ static int __devinit 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, @@ -606,66 +705,26 @@ static int __devinit 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]; - /* - * Register the regulator, pass around - * the ab3100_regulator struct - */ - rdev = regulator_register(&ab3100_regulator_desc[i], - &pdev->dev, - &plfdata->reg_constraints[i], - reg); - - 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 __devexit 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", .owner = THIS_MODULE, }, .probe = ab3100_regulators_probe, - .remove = __devexit_p(ab3100_regulators_remove), + .remove = ab3100_regulators_remove, }; static __init int ab3100_regulators_init(void) |