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regulator: mcp16502: add support for ramp delay
MCP16502 have configurable ramp delay support (via DVSR bits in regulators' CFG register). Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/1605280870-32432-6-git-send-email-claudiu.beznea@microchip.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
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3e5532a011
commit
322eb8666d
1 changed files with 87 additions and 2 deletions
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@ -23,6 +23,7 @@
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#define VDD_HIGH_SEL 0x3F
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#define VDD_HIGH_SEL 0x3F
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#define MCP16502_FLT BIT(7)
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#define MCP16502_FLT BIT(7)
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#define MCP16502_DVSR GENMASK(3, 2)
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#define MCP16502_ENS BIT(0)
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#define MCP16502_ENS BIT(0)
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/*
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/*
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@ -88,6 +89,12 @@ enum mcp16502_reg {
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MCP16502_REG_CFG,
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MCP16502_REG_CFG,
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};
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};
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/* Ramp delay (uV/us) for buck1, ldo1, ldo2. */
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static const int mcp16502_ramp_b1l12[] = { 6250, 3125, 2083, 1563 };
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/* Ramp delay (uV/us) for buck2, buck3, buck4. */
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static const int mcp16502_ramp_b234[] = { 3125, 1563, 1042, 781 };
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static unsigned int mcp16502_of_map_mode(unsigned int mode)
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static unsigned int mcp16502_of_map_mode(unsigned int mode)
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{
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{
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if (mode == REGULATOR_MODE_NORMAL || mode == REGULATOR_MODE_IDLE)
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if (mode == REGULATOR_MODE_NORMAL || mode == REGULATOR_MODE_IDLE)
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@ -271,6 +278,80 @@ static int mcp16502_get_status(struct regulator_dev *rdev)
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return REGULATOR_STATUS_UNDEFINED;
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return REGULATOR_STATUS_UNDEFINED;
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}
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}
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static int mcp16502_set_voltage_time_sel(struct regulator_dev *rdev,
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unsigned int old_sel,
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unsigned int new_sel)
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{
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static const u8 us_ramp[] = { 8, 16, 24, 32 };
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int id = rdev_get_id(rdev);
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unsigned int uV_delta, val;
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int ret;
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ret = regmap_read(rdev->regmap, MCP16502_REG_BASE(id, CFG), &val);
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if (ret)
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return ret;
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val = (val & MCP16502_DVSR) >> 2;
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uV_delta = abs(new_sel * rdev->desc->linear_ranges->step -
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old_sel * rdev->desc->linear_ranges->step);
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switch (id) {
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case BUCK1:
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case LDO1:
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case LDO2:
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ret = DIV_ROUND_CLOSEST(uV_delta * us_ramp[val],
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mcp16502_ramp_b1l12[val]);
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break;
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case BUCK2:
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case BUCK3:
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case BUCK4:
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ret = DIV_ROUND_CLOSEST(uV_delta * us_ramp[val],
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mcp16502_ramp_b234[val]);
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break;
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default:
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return -EINVAL;
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}
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return ret;
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}
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static int mcp16502_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
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{
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const int *ramp;
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int id = rdev_get_id(rdev);
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unsigned int i, size;
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switch (id) {
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case BUCK1:
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case LDO1:
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case LDO2:
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ramp = mcp16502_ramp_b1l12;
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size = ARRAY_SIZE(mcp16502_ramp_b1l12);
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break;
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case BUCK2:
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case BUCK3:
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case BUCK4:
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ramp = mcp16502_ramp_b234;
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size = ARRAY_SIZE(mcp16502_ramp_b234);
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break;
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default:
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return -EINVAL;
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}
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for (i = 0; i < size; i++) {
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if (ramp[i] == ramp_delay)
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break;
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}
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if (i == size)
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return -EINVAL;
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return regmap_update_bits(rdev->regmap, MCP16502_REG_BASE(id, CFG),
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MCP16502_DVSR, (i << 2));
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}
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#ifdef CONFIG_SUSPEND
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#ifdef CONFIG_SUSPEND
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/*
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/*
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* mcp16502_suspend_get_target_reg() - get the reg of the target suspend PMIC
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* mcp16502_suspend_get_target_reg() - get the reg of the target suspend PMIC
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@ -365,6 +446,8 @@ static const struct regulator_ops mcp16502_buck_ops = {
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.disable = regulator_disable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.get_status = mcp16502_get_status,
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.get_status = mcp16502_get_status,
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.set_voltage_time_sel = mcp16502_set_voltage_time_sel,
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.set_ramp_delay = mcp16502_set_ramp_delay,
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.set_mode = mcp16502_set_mode,
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.set_mode = mcp16502_set_mode,
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.get_mode = mcp16502_get_mode,
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.get_mode = mcp16502_get_mode,
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@ -389,6 +472,8 @@ static const struct regulator_ops mcp16502_ldo_ops = {
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.disable = regulator_disable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.get_status = mcp16502_get_status,
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.get_status = mcp16502_get_status,
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.set_voltage_time_sel = mcp16502_set_voltage_time_sel,
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.set_ramp_delay = mcp16502_set_ramp_delay,
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#ifdef CONFIG_SUSPEND
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#ifdef CONFIG_SUSPEND
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.set_suspend_voltage = mcp16502_set_suspend_voltage,
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.set_suspend_voltage = mcp16502_set_suspend_voltage,
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