diff options
| author | Andrew Bresticker <abrestic@chromium.org> | 2013-12-26 13:48:46 -0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-01-06 18:09:36 +0000 |
| commit | 762a8ee808972354ce4bca988309aa7fb63ed5ae (patch) | |
| tree | 19fed2a02e18080a06aef61eae22131e3c494f1f | |
| parent | bc2571f4ba375101c9d0b7d46d8c241822652433 (diff) | |
regulator: as3722: detect SD0 low-voltage mode
SD0 may operate in low-voltage mode, with a minimum of 0.41V
and a maximum of 1.5V. This is indicated by bit 4 of FUSE7.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Vince Hsu <vinceh@nvidia.com>
broonie.e6264@m.evernote.com
Signed-off-by: Mark Brown <broonie@linaro.org>
| -rw-r--r-- | drivers/regulator/as3722-regulator.c | 30 | ||||
| -rw-r--r-- | include/linux/mfd/as3722.h | 4 |
2 files changed, 30 insertions, 4 deletions
diff --git a/drivers/regulator/as3722-regulator.c b/drivers/regulator/as3722-regulator.c index fdb31371a23..3d7fbc21181 100644 --- a/drivers/regulator/as3722-regulator.c +++ b/drivers/regulator/as3722-regulator.c @@ -99,7 +99,6 @@ static const struct as3722_register_mapping as3722_reg_lookup[] = { .sleep_ctrl_mask = AS3722_SD0_EXT_ENABLE_MASK, .control_reg = AS3722_SD0_CONTROL_REG, .mode_mask = AS3722_SD0_MODE_FAST, - .n_voltages = AS3722_SD0_VSEL_MAX + 1, }, { .regulator_id = AS3722_REGULATOR_ID_SD1, @@ -112,7 +111,6 @@ static const struct as3722_register_mapping as3722_reg_lookup[] = { .sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK, .control_reg = AS3722_SD1_CONTROL_REG, .mode_mask = AS3722_SD1_MODE_FAST, - .n_voltages = AS3722_SD0_VSEL_MAX + 1, }, { .regulator_id = AS3722_REGULATOR_ID_SD2, @@ -181,7 +179,6 @@ static const struct as3722_register_mapping as3722_reg_lookup[] = { .sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK, .control_reg = AS3722_SD6_CONTROL_REG, .mode_mask = AS3722_SD6_MODE_FAST, - .n_voltages = AS3722_SD0_VSEL_MAX + 1, }, { .regulator_id = AS3722_REGULATOR_ID_LDO0, @@ -595,6 +592,22 @@ static int as3722_sd016_set_current_limit(struct regulator_dev *rdev, return as3722_update_bits(as3722, reg, mask, val); } +static bool as3722_sd0_is_low_voltage(struct as3722_regulators *as3722_regs) +{ + int err; + unsigned val; + + err = as3722_read(as3722_regs->as3722, AS3722_FUSE7_REG, &val); + if (err < 0) { + dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", + AS3722_FUSE7_REG, err); + return false; + } + if (val & AS3722_FUSE7_SD0_LOW_VOLTAGE) + return true; + return false; +} + static const struct regulator_linear_range as3722_sd2345_ranges[] = { REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500), REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000), @@ -820,7 +833,16 @@ static int as3722_regulator_probe(struct platform_device *pdev) ops = &as3722_sd016_extcntrl_ops; else ops = &as3722_sd016_ops; - as3722_regs->desc[id].min_uV = 610000; + if (id == AS3722_REGULATOR_ID_SD0 && + as3722_sd0_is_low_voltage(as3722_regs)) { + as3722_regs->desc[id].n_voltages = + AS3722_SD0_VSEL_LOW_VOL_MAX + 1; + as3722_regs->desc[id].min_uV = 410000; + } else { + as3722_regs->desc[id].n_voltages = + AS3722_SD0_VSEL_MAX + 1, + as3722_regs->desc[id].min_uV = 610000; + } as3722_regs->desc[id].uV_step = 10000; as3722_regs->desc[id].linear_min_sel = 1; break; diff --git a/include/linux/mfd/as3722.h b/include/linux/mfd/as3722.h index 16bf8a0dcd9..bb9616dc0ef 100644 --- a/include/linux/mfd/as3722.h +++ b/include/linux/mfd/as3722.h @@ -151,6 +151,7 @@ #define AS3722_ASIC_ID1_REG 0x90 #define AS3722_ASIC_ID2_REG 0x91 #define AS3722_LOCK_REG 0x9E +#define AS3722_FUSE7_REG 0xA7 #define AS3722_MAX_REGISTER 0xF4 #define AS3722_SD0_EXT_ENABLE_MASK 0x03 @@ -224,6 +225,7 @@ #define AS3722_SD_VSEL_MASK 0x7F #define AS3722_SD0_VSEL_MIN 0x01 #define AS3722_SD0_VSEL_MAX 0x5A +#define AS3722_SD0_VSEL_LOW_VOL_MAX 0x6E #define AS3722_SD2_VSEL_MIN 0x01 #define AS3722_SD2_VSEL_MAX 0x7F @@ -341,6 +343,8 @@ #define AS3722_EXT_CONTROL_ENABLE2 0x2 #define AS3722_EXT_CONTROL_ENABLE3 0x3 +#define AS3722_FUSE7_SD0_LOW_VOLTAGE BIT(4) + /* Interrupt IDs */ enum as3722_irq { AS3722_IRQ_LID, |