diff options
Diffstat (limited to 'drivers/regulator/tps65910-regulator.c')
| -rw-r--r-- | drivers/regulator/tps65910-regulator.c | 398 |
1 files changed, 344 insertions, 54 deletions
diff --git a/drivers/regulator/tps65910-regulator.c b/drivers/regulator/tps65910-regulator.c index 5c15ba01e9c7..3d1370f9bc7f 100644 --- a/drivers/regulator/tps65910-regulator.c +++ b/drivers/regulator/tps65910-regulator.c @@ -26,6 +26,10 @@ #include <linux/mfd/tps65910.h> #define TPS65910_SUPPLY_STATE_ENABLED 0x1 +#define EXT_SLEEP_CONTROL (TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1 | \ + TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2 | \ + TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3 | \ + TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP) /* supported VIO voltages in milivolts */ static const u16 VIO_VSEL_table[] = { @@ -83,161 +87,235 @@ struct tps_info { const char *name; unsigned min_uV; unsigned max_uV; - u8 table_len; - const u16 *table; + u8 n_voltages; + const u16 *voltage_table; + int enable_time_us; }; static struct tps_info tps65910_regs[] = { { .name = "VRTC", + .enable_time_us = 2200, }, { .name = "VIO", .min_uV = 1500000, .max_uV = 3300000, - .table_len = ARRAY_SIZE(VIO_VSEL_table), - .table = VIO_VSEL_table, + .n_voltages = ARRAY_SIZE(VIO_VSEL_table), + .voltage_table = VIO_VSEL_table, + .enable_time_us = 350, }, { .name = "VDD1", .min_uV = 600000, .max_uV = 4500000, + .enable_time_us = 350, }, { .name = "VDD2", .min_uV = 600000, .max_uV = 4500000, + .enable_time_us = 350, }, { .name = "VDD3", .min_uV = 5000000, .max_uV = 5000000, - .table_len = ARRAY_SIZE(VDD3_VSEL_table), - .table = VDD3_VSEL_table, + .n_voltages = ARRAY_SIZE(VDD3_VSEL_table), + .voltage_table = VDD3_VSEL_table, + .enable_time_us = 200, }, { .name = "VDIG1", .min_uV = 1200000, .max_uV = 2700000, - .table_len = ARRAY_SIZE(VDIG1_VSEL_table), - .table = VDIG1_VSEL_table, + .n_voltages = ARRAY_SIZE(VDIG1_VSEL_table), + .voltage_table = VDIG1_VSEL_table, + .enable_time_us = 100, }, { .name = "VDIG2", .min_uV = 1000000, .max_uV = 1800000, - .table_len = ARRAY_SIZE(VDIG2_VSEL_table), - .table = VDIG2_VSEL_table, + .n_voltages = ARRAY_SIZE(VDIG2_VSEL_table), + .voltage_table = VDIG2_VSEL_table, + .enable_time_us = 100, }, { .name = "VPLL", .min_uV = 1000000, .max_uV = 2500000, - .table_len = ARRAY_SIZE(VPLL_VSEL_table), - .table = VPLL_VSEL_table, + .n_voltages = ARRAY_SIZE(VPLL_VSEL_table), + .voltage_table = VPLL_VSEL_table, + .enable_time_us = 100, }, { .name = "VDAC", .min_uV = 1800000, .max_uV = 2850000, - .table_len = ARRAY_SIZE(VDAC_VSEL_table), - .table = VDAC_VSEL_table, + .n_voltages = ARRAY_SIZE(VDAC_VSEL_table), + .voltage_table = VDAC_VSEL_table, + .enable_time_us = 100, }, { .name = "VAUX1", .min_uV = 1800000, .max_uV = 2850000, - .table_len = ARRAY_SIZE(VAUX1_VSEL_table), - .table = VAUX1_VSEL_table, + .n_voltages = ARRAY_SIZE(VAUX1_VSEL_table), + .voltage_table = VAUX1_VSEL_table, + .enable_time_us = 100, }, { .name = "VAUX2", .min_uV = 1800000, .max_uV = 3300000, - .table_len = ARRAY_SIZE(VAUX2_VSEL_table), - .table = VAUX2_VSEL_table, + .n_voltages = ARRAY_SIZE(VAUX2_VSEL_table), + .voltage_table = VAUX2_VSEL_table, + .enable_time_us = 100, }, { .name = "VAUX33", .min_uV = 1800000, .max_uV = 3300000, - .table_len = ARRAY_SIZE(VAUX33_VSEL_table), - .table = VAUX33_VSEL_table, + .n_voltages = ARRAY_SIZE(VAUX33_VSEL_table), + .voltage_table = VAUX33_VSEL_table, + .enable_time_us = 100, }, { .name = "VMMC", .min_uV = 1800000, .max_uV = 3300000, - .table_len = ARRAY_SIZE(VMMC_VSEL_table), - .table = VMMC_VSEL_table, + .n_voltages = ARRAY_SIZE(VMMC_VSEL_table), + .voltage_table = VMMC_VSEL_table, + .enable_time_us = 100, }, }; static struct tps_info tps65911_regs[] = { { + .name = "VRTC", + .enable_time_us = 2200, + }, + { .name = "VIO", .min_uV = 1500000, .max_uV = 3300000, - .table_len = ARRAY_SIZE(VIO_VSEL_table), - .table = VIO_VSEL_table, + .n_voltages = ARRAY_SIZE(VIO_VSEL_table), + .voltage_table = VIO_VSEL_table, + .enable_time_us = 350, }, { .name = "VDD1", .min_uV = 600000, .max_uV = 4500000, + .n_voltages = 73, + .enable_time_us = 350, }, { .name = "VDD2", .min_uV = 600000, .max_uV = 4500000, + .n_voltages = 73, + .enable_time_us = 350, }, { .name = "VDDCTRL", .min_uV = 600000, .max_uV = 1400000, + .n_voltages = 65, + .enable_time_us = 900, }, { .name = "LDO1", .min_uV = 1000000, .max_uV = 3300000, + .n_voltages = 47, + .enable_time_us = 420, }, { .name = "LDO2", .min_uV = 1000000, .max_uV = 3300000, + .n_voltages = 47, + .enable_time_us = 420, }, { .name = "LDO3", .min_uV = 1000000, .max_uV = 3300000, + .n_voltages = 24, + .enable_time_us = 230, }, { .name = "LDO4", .min_uV = 1000000, .max_uV = 3300000, + .n_voltages = 47, + .enable_time_us = 230, }, { .name = "LDO5", .min_uV = 1000000, .max_uV = 3300000, + .n_voltages = 24, + .enable_time_us = 230, }, { .name = "LDO6", .min_uV = 1000000, .max_uV = 3300000, + .n_voltages = 24, + .enable_time_us = 230, }, { .name = "LDO7", .min_uV = 1000000, .max_uV = 3300000, + .n_voltages = 24, + .enable_time_us = 230, }, { .name = "LDO8", .min_uV = 1000000, .max_uV = 3300000, + .n_voltages = 24, + .enable_time_us = 230, }, }; +#define EXT_CONTROL_REG_BITS(id, regs_offs, bits) (((regs_offs) << 8) | (bits)) +static unsigned int tps65910_ext_sleep_control[] = { + 0, + EXT_CONTROL_REG_BITS(VIO, 1, 0), + EXT_CONTROL_REG_BITS(VDD1, 1, 1), + EXT_CONTROL_REG_BITS(VDD2, 1, 2), + EXT_CONTROL_REG_BITS(VDD3, 1, 3), + EXT_CONTROL_REG_BITS(VDIG1, 0, 1), + EXT_CONTROL_REG_BITS(VDIG2, 0, 2), + EXT_CONTROL_REG_BITS(VPLL, 0, 6), + EXT_CONTROL_REG_BITS(VDAC, 0, 7), + EXT_CONTROL_REG_BITS(VAUX1, 0, 3), + EXT_CONTROL_REG_BITS(VAUX2, 0, 4), + EXT_CONTROL_REG_BITS(VAUX33, 0, 5), + EXT_CONTROL_REG_BITS(VMMC, 0, 0), +}; + +static unsigned int tps65911_ext_sleep_control[] = { + 0, + EXT_CONTROL_REG_BITS(VIO, 1, 0), + EXT_CONTROL_REG_BITS(VDD1, 1, 1), + EXT_CONTROL_REG_BITS(VDD2, 1, 2), + EXT_CONTROL_REG_BITS(VDDCTRL, 1, 3), + EXT_CONTROL_REG_BITS(LDO1, 0, 1), + EXT_CONTROL_REG_BITS(LDO2, 0, 2), + EXT_CONTROL_REG_BITS(LDO3, 0, 7), + EXT_CONTROL_REG_BITS(LDO4, 0, 6), + EXT_CONTROL_REG_BITS(LDO5, 0, 3), + EXT_CONTROL_REG_BITS(LDO6, 0, 0), + EXT_CONTROL_REG_BITS(LDO7, 0, 5), + EXT_CONTROL_REG_BITS(LDO8, 0, 4), +}; + struct tps65910_reg { struct regulator_desc *desc; struct tps65910 *mfd; @@ -247,6 +325,8 @@ struct tps65910_reg { int num_regulators; int mode; int (*get_ctrl_reg)(int); + unsigned int *ext_sleep_control; + unsigned int board_ext_control[TPS65910_NUM_REGS]; }; static inline int tps65910_read(struct tps65910_reg *pmic, u8 reg) @@ -429,6 +509,12 @@ static int tps65910_disable(struct regulator_dev *dev) return tps65910_clear_bits(mfd, reg, TPS65910_SUPPLY_STATE_ENABLED); } +static int tps65910_enable_time(struct regulator_dev *dev) +{ + struct tps65910_reg *pmic = rdev_get_drvdata(dev); + int id = rdev_get_id(dev); + return pmic->info[id]->enable_time_us; +} static int tps65910_set_mode(struct regulator_dev *dev, unsigned int mode) { @@ -467,7 +553,7 @@ static unsigned int tps65910_get_mode(struct regulator_dev *dev) if (value < 0) return value; - if (value & LDO_ST_ON_BIT) + if (!(value & LDO_ST_ON_BIT)) return REGULATOR_MODE_STANDBY; else if (value & LDO_ST_MODE_BIT) return REGULATOR_MODE_IDLE; @@ -475,10 +561,10 @@ static unsigned int tps65910_get_mode(struct regulator_dev *dev) return REGULATOR_MODE_NORMAL; } -static int tps65910_get_voltage_dcdc(struct regulator_dev *dev) +static int tps65910_get_voltage_dcdc_sel(struct regulator_dev *dev) { struct tps65910_reg *pmic = rdev_get_drvdata(dev); - int id = rdev_get_id(dev), voltage = 0; + int id = rdev_get_id(dev); int opvsel = 0, srvsel = 0, vselmax = 0, mult = 0, sr = 0; switch (id) { @@ -522,9 +608,7 @@ static int tps65910_get_voltage_dcdc(struct regulator_dev *dev) srvsel = 3; if (srvsel > vselmax) srvsel = vselmax; - srvsel -= 3; - - voltage = (srvsel * VDD1_2_OFFSET + VDD1_2_MIN_VOLT) * 100; + return srvsel - 3; } else { /* normalise to valid range*/ @@ -532,14 +616,9 @@ static int tps65910_get_voltage_dcdc(struct regulator_dev *dev) opvsel = 3; if (opvsel > vselmax) opvsel = vselmax; - opvsel -= 3; - - voltage = (opvsel * VDD1_2_OFFSET + VDD1_2_MIN_VOLT) * 100; + return opvsel - 3; } - - voltage *= mult; - - return voltage; + return -EINVAL; } static int tps65910_get_voltage(struct regulator_dev *dev) @@ -572,7 +651,7 @@ static int tps65910_get_voltage(struct regulator_dev *dev) return -EINVAL; } - voltage = pmic->info[id]->table[value] * 1000; + voltage = pmic->info[id]->voltage_table[value] * 1000; return voltage; } @@ -622,8 +701,9 @@ static int tps65911_get_voltage(struct regulator_dev *dev) step_mv = 100; break; case TPS65910_REG_VIO: - return pmic->info[id]->table[value] * 1000; - break; + value &= LDO_SEL_MASK; + value >>= LDO_SEL_SHIFT; + return pmic->info[id]->voltage_table[value] * 1000; default: return -EINVAL; } @@ -631,8 +711,8 @@ static int tps65911_get_voltage(struct regulator_dev *dev) return (LDO_MIN_VOLT + value * step_mv) * 1000; } -static int tps65910_set_voltage_dcdc(struct regulator_dev *dev, - unsigned selector) +static int tps65910_set_voltage_dcdc_sel(struct regulator_dev *dev, + unsigned selector) { struct tps65910_reg *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev), vsel; @@ -669,7 +749,8 @@ static int tps65910_set_voltage_dcdc(struct regulator_dev *dev, return 0; } -static int tps65910_set_voltage(struct regulator_dev *dev, unsigned selector) +static int tps65910_set_voltage_sel(struct regulator_dev *dev, + unsigned selector) { struct tps65910_reg *pmic = rdev_get_drvdata(dev); int reg, id = rdev_get_id(dev); @@ -695,7 +776,8 @@ static int tps65910_set_voltage(struct regulator_dev *dev, unsigned selector) return -EINVAL; } -static int tps65911_set_voltage(struct regulator_dev *dev, unsigned selector) +static int tps65911_set_voltage_sel(struct regulator_dev *dev, + unsigned selector) { struct tps65910_reg *pmic = rdev_get_drvdata(dev); int reg, id = rdev_get_id(dev); @@ -715,9 +797,11 @@ static int tps65911_set_voltage(struct regulator_dev *dev, unsigned selector) case TPS65911_REG_LDO6: case TPS65911_REG_LDO7: case TPS65911_REG_LDO8: - case TPS65910_REG_VIO: return tps65910_modify_bits(pmic, reg, (selector << LDO_SEL_SHIFT), LDO3_SEL_MASK); + case TPS65910_REG_VIO: + return tps65910_modify_bits(pmic, reg, + (selector << LDO_SEL_SHIFT), LDO_SEL_MASK); } return -EINVAL; @@ -756,10 +840,10 @@ static int tps65910_list_voltage(struct regulator_dev *dev, if (id < TPS65910_REG_VIO || id > TPS65910_REG_VMMC) return -EINVAL; - if (selector >= pmic->info[id]->table_len) + if (selector >= pmic->info[id]->n_voltages) return -EINVAL; else - voltage = pmic->info[id]->table[selector] * 1000; + voltage = pmic->info[id]->voltage_table[selector] * 1000; return voltage; } @@ -795,7 +879,7 @@ static int tps65911_list_voltage(struct regulator_dev *dev, unsigned selector) step_mv = 100; break; case TPS65910_REG_VIO: - return pmic->info[id]->table[selector] * 1000; + return pmic->info[id]->voltage_table[selector] * 1000; default: return -EINVAL; } @@ -803,15 +887,42 @@ static int tps65911_list_voltage(struct regulator_dev *dev, unsigned selector) return (LDO_MIN_VOLT + selector * step_mv) * 1000; } +static int tps65910_set_voltage_dcdc_time_sel(struct regulator_dev *dev, + unsigned int old_selector, unsigned int new_selector) +{ + int id = rdev_get_id(dev); + int old_volt, new_volt; + + old_volt = tps65910_list_voltage_dcdc(dev, old_selector); + if (old_volt < 0) + return old_volt; + + new_volt = tps65910_list_voltage_dcdc(dev, new_selector); + if (new_volt < 0) + return new_volt; + + /* VDD1 and VDD2 are 12.5mV/us, VDDCTRL is 100mV/20us */ + switch (id) { + case TPS65910_REG_VDD1: + case TPS65910_REG_VDD2: + return DIV_ROUND_UP(abs(old_volt - new_volt), 12500); + case TPS65911_REG_VDDCTRL: + return DIV_ROUND_UP(abs(old_volt - new_volt), 5000); + } + return -EINVAL; +} + /* Regulator ops (except VRTC) */ static struct regulator_ops tps65910_ops_dcdc = { .is_enabled = tps65910_is_enabled, .enable = tps65910_enable, .disable = tps65910_disable, + .enable_time = tps65910_enable_time, .set_mode = tps65910_set_mode, .get_mode = tps65910_get_mode, - .get_voltage = tps65910_get_voltage_dcdc, - .set_voltage_sel = tps65910_set_voltage_dcdc, + .get_voltage_sel = tps65910_get_voltage_dcdc_sel, + .set_voltage_sel = tps65910_set_voltage_dcdc_sel, + .set_voltage_time_sel = tps65910_set_voltage_dcdc_time_sel, .list_voltage = tps65910_list_voltage_dcdc, }; @@ -819,6 +930,7 @@ static struct regulator_ops tps65910_ops_vdd3 = { .is_enabled = tps65910_is_enabled, .enable = tps65910_enable, .disable = tps65910_disable, + .enable_time = tps65910_enable_time, .set_mode = tps65910_set_mode, .get_mode = tps65910_get_mode, .get_voltage = tps65910_get_voltage_vdd3, @@ -829,10 +941,11 @@ static struct regulator_ops tps65910_ops = { .is_enabled = tps65910_is_enabled, .enable = tps65910_enable, .disable = tps65910_disable, + .enable_time = tps65910_enable_time, .set_mode = tps65910_set_mode, .get_mode = tps65910_get_mode, .get_voltage = tps65910_get_voltage, - .set_voltage_sel = tps65910_set_voltage, + .set_voltage_sel = tps65910_set_voltage_sel, .list_voltage = tps65910_list_voltage, }; @@ -840,13 +953,147 @@ static struct regulator_ops tps65911_ops = { .is_enabled = tps65910_is_enabled, .enable = tps65910_enable, .disable = tps65910_disable, + .enable_time = tps65910_enable_time, .set_mode = tps65910_set_mode, .get_mode = tps65910_get_mode, .get_voltage = tps65911_get_voltage, - .set_voltage_sel = tps65911_set_voltage, + .set_voltage_sel = tps65911_set_voltage_sel, .list_voltage = tps65911_list_voltage, }; +static int tps65910_set_ext_sleep_config(struct tps65910_reg *pmic, + int id, int ext_sleep_config) +{ + struct tps65910 *mfd = pmic->mfd; + u8 regoffs = (pmic->ext_sleep_control[id] >> 8) & 0xFF; + u8 bit_pos = (1 << pmic->ext_sleep_control[id] & 0xFF); + int ret; + + /* + * Regulator can not be control from multiple external input EN1, EN2 + * and EN3 together. + */ + if (ext_sleep_config & EXT_SLEEP_CONTROL) { + int en_count; + en_count = ((ext_sleep_config & + TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1) != 0); + en_count += ((ext_sleep_config & + TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2) != 0); + en_count += ((ext_sleep_config & + TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3) != 0); + en_count += ((ext_sleep_config & + TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP) != 0); + if (en_count > 1) { + dev_err(mfd->dev, + "External sleep control flag is not proper\n"); + return -EINVAL; + } + } + + pmic->board_ext_control[id] = ext_sleep_config; + + /* External EN1 control */ + if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1) + ret = tps65910_set_bits(mfd, + TPS65910_EN1_LDO_ASS + regoffs, bit_pos); + else + ret = tps65910_clear_bits(mfd, + TPS65910_EN1_LDO_ASS + regoffs, bit_pos); + if (ret < 0) { + dev_err(mfd->dev, + "Error in configuring external control EN1\n"); + return ret; + } + + /* External EN2 control */ + if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2) + ret = tps65910_set_bits(mfd, + TPS65910_EN2_LDO_ASS + regoffs, bit_pos); + else + ret = tps65910_clear_bits(mfd, + TPS65910_EN2_LDO_ASS + regoffs, bit_pos); + if (ret < 0) { + dev_err(mfd->dev, + "Error in configuring external control EN2\n"); + return ret; + } + + /* External EN3 control for TPS65910 LDO only */ + if ((tps65910_chip_id(mfd) == TPS65910) && + (id >= TPS65910_REG_VDIG1)) { + if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3) + ret = tps65910_set_bits(mfd, + TPS65910_EN3_LDO_ASS + regoffs, bit_pos); + else + ret = tps65910_clear_bits(mfd, + TPS65910_EN3_LDO_ASS + regoffs, bit_pos); + if (ret < 0) { + dev_err(mfd->dev, + "Error in configuring external control EN3\n"); + return ret; + } + } + + /* Return if no external control is selected */ + if (!(ext_sleep_config & EXT_SLEEP_CONTROL)) { + /* Clear all sleep controls */ + ret = tps65910_clear_bits(mfd, + TPS65910_SLEEP_KEEP_LDO_ON + regoffs, bit_pos); + if (!ret) + ret = tps65910_clear_bits(mfd, + TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos); + if (ret < 0) + dev_err(mfd->dev, + "Error in configuring SLEEP register\n"); + return ret; + } + + /* + * For regulator that has separate operational and sleep register make + * sure that operational is used and clear sleep register to turn + * regulator off when external control is inactive + */ + if ((id == TPS65910_REG_VDD1) || + (id == TPS65910_REG_VDD2) || + ((id == TPS65911_REG_VDDCTRL) && + (tps65910_chip_id(mfd) == TPS65911))) { + int op_reg_add = pmic->get_ctrl_reg(id) + 1; + int sr_reg_add = pmic->get_ctrl_reg(id) + 2; + int opvsel = tps65910_reg_read(pmic, op_reg_add); + int srvsel = tps65910_reg_read(pmic, sr_reg_add); + if (opvsel & VDD1_OP_CMD_MASK) { + u8 reg_val = srvsel & VDD1_OP_SEL_MASK; + ret = tps65910_reg_write(pmic, op_reg_add, reg_val); + if (ret < 0) { + dev_err(mfd->dev, + "Error in configuring op register\n"); + return ret; + } + } + ret = tps65910_reg_write(pmic, sr_reg_add, 0); + if (ret < 0) { + dev_err(mfd->dev, "Error in settting sr register\n"); + return ret; + } + } + + ret = tps65910_clear_bits(mfd, + TPS65910_SLEEP_KEEP_LDO_ON + regoffs, bit_pos); + if (!ret) { + if (ext_sleep_config & TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP) + ret = tps65910_set_bits(mfd, + TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos); + else + ret = tps65910_clear_bits(mfd, + TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos); + } + if (ret < 0) + dev_err(mfd->dev, + "Error in configuring SLEEP register\n"); + + return ret; +} + static __devinit int tps65910_probe(struct platform_device *pdev) { struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent); @@ -877,11 +1124,13 @@ static __devinit int tps65910_probe(struct platform_device *pdev) case TPS65910: pmic->get_ctrl_reg = &tps65910_get_ctrl_register; pmic->num_regulators = ARRAY_SIZE(tps65910_regs); + pmic->ext_sleep_control = tps65910_ext_sleep_control; info = tps65910_regs; break; case TPS65911: pmic->get_ctrl_reg = &tps65911_get_ctrl_register; pmic->num_regulators = ARRAY_SIZE(tps65911_regs); + pmic->ext_sleep_control = tps65911_ext_sleep_control; info = tps65911_regs; break; default: @@ -926,7 +1175,7 @@ static __devinit int tps65910_probe(struct platform_device *pdev) pmic->desc[i].name = info->name; pmic->desc[i].id = i; - pmic->desc[i].n_voltages = info->table_len; + pmic->desc[i].n_voltages = info->n_voltages; if (i == TPS65910_REG_VDD1 || i == TPS65910_REG_VDD2) { pmic->desc[i].ops = &tps65910_ops_dcdc; @@ -944,6 +1193,16 @@ static __devinit int tps65910_probe(struct platform_device *pdev) pmic->desc[i].ops = &tps65911_ops; } + err = tps65910_set_ext_sleep_config(pmic, i, + pmic_plat_data->regulator_ext_sleep_control[i]); + /* + * Failing on regulator for configuring externally control + * is not a serious issue, just throw warning. + */ + if (err < 0) + dev_warn(tps65910->dev, + "Failed to initialise ext control config\n"); + pmic->desc[i].type = REGULATOR_VOLTAGE; pmic->desc[i].owner = THIS_MODULE; @@ -990,6 +1249,36 @@ static int __devexit tps65910_remove(struct platform_device *pdev) return 0; } +static void tps65910_shutdown(struct platform_device *pdev) +{ + struct tps65910_reg *pmic = platform_get_drvdata(pdev); + int i; + + /* + * Before bootloader jumps to kernel, it makes sure that required + * external control signals are in desired state so that given rails + * can be configure accordingly. + * If rails are configured to be controlled from external control + * then before shutting down/rebooting the system, the external + * control configuration need to be remove from the rails so that + * its output will be available as per register programming even + * if external controls are removed. This is require when the POR + * value of the control signals are not in active state and before + * bootloader initializes it, the system requires the rail output + * to be active for booting. + */ + for (i = 0; i < pmic->num_regulators; i++) { + int err; + if (!pmic->rdev[i]) + continue; + + err = tps65910_set_ext_sleep_config(pmic, i, 0); + if (err < 0) + dev_err(&pdev->dev, + "Error in clearing external control\n"); + } +} + static struct platform_driver tps65910_driver = { .driver = { .name = "tps65910-pmic", @@ -997,6 +1286,7 @@ static struct platform_driver tps65910_driver = { }, .probe = tps65910_probe, .remove = __devexit_p(tps65910_remove), + .shutdown = tps65910_shutdown, }; static int __init tps65910_init(void) @@ -1012,6 +1302,6 @@ static void __exit tps65910_cleanup(void) module_exit(tps65910_cleanup); MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); -MODULE_DESCRIPTION("TPS6507x voltage regulator driver"); +MODULE_DESCRIPTION("TPS65910/TPS65911 voltage regulator driver"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:tps65910-pmic"); |