diff options
Diffstat (limited to 'target/linux/at91/patches-5.10/125-regulator-mcp16502-add-support-for-ramp-delay.patch')
| -rw-r--r-- | target/linux/at91/patches-5.10/125-regulator-mcp16502-add-support-for-ramp-delay.patch | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/target/linux/at91/patches-5.10/125-regulator-mcp16502-add-support-for-ramp-delay.patch b/target/linux/at91/patches-5.10/125-regulator-mcp16502-add-support-for-ramp-delay.patch new file mode 100644 index 0000000000..ef06660803 --- /dev/null +++ b/target/linux/at91/patches-5.10/125-regulator-mcp16502-add-support-for-ramp-delay.patch @@ -0,0 +1,146 @@ +From 7f13433e11a3c88f1fd6417c4c5e5a6c98370b9a Mon Sep 17 00:00:00 2001 +From: Claudiu Beznea <claudiu.beznea@microchip.com> +Date: Fri, 13 Nov 2020 17:21:09 +0200 +Subject: [PATCH 125/247] 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> +--- + drivers/regulator/mcp16502.c | 89 +++++++++++++++++++++++++++++++++++- + 1 file changed, 87 insertions(+), 2 deletions(-) + +diff --git a/drivers/regulator/mcp16502.c b/drivers/regulator/mcp16502.c +index 48eb64bc4018..f81afeeddb19 100644 +--- a/drivers/regulator/mcp16502.c ++++ b/drivers/regulator/mcp16502.c +@@ -22,8 +22,9 @@ + #define VDD_LOW_SEL 0x0D + #define VDD_HIGH_SEL 0x3F + +-#define MCP16502_FLT BIT(7) +-#define MCP16502_ENS BIT(0) ++#define MCP16502_FLT BIT(7) ++#define MCP16502_DVSR GENMASK(3, 2) ++#define MCP16502_ENS BIT(0) + + /* + * The PMIC has four sets of registers corresponding to four power modes: +@@ -88,6 +89,12 @@ enum mcp16502_reg { + MCP16502_REG_CFG, + }; + ++/* Ramp delay (uV/us) for buck1, ldo1, ldo2. */ ++static const int mcp16502_ramp_b1l12[] = { 6250, 3125, 2083, 1563 }; ++ ++/* Ramp delay (uV/us) for buck2, buck3, buck4. */ ++static const int mcp16502_ramp_b234[] = { 3125, 1563, 1042, 781 }; ++ + static unsigned int mcp16502_of_map_mode(unsigned int mode) + { + if (mode == REGULATOR_MODE_NORMAL || mode == REGULATOR_MODE_IDLE) +@@ -271,6 +278,80 @@ static int mcp16502_get_status(struct regulator_dev *rdev) + return REGULATOR_STATUS_UNDEFINED; + } + ++static int mcp16502_set_voltage_time_sel(struct regulator_dev *rdev, ++ unsigned int old_sel, ++ unsigned int new_sel) ++{ ++ static const u8 us_ramp[] = { 8, 16, 24, 32 }; ++ int id = rdev_get_id(rdev); ++ unsigned int uV_delta, val; ++ int ret; ++ ++ ret = regmap_read(rdev->regmap, MCP16502_REG_BASE(id, CFG), &val); ++ if (ret) ++ return ret; ++ ++ val = (val & MCP16502_DVSR) >> 2; ++ uV_delta = abs(new_sel * rdev->desc->linear_ranges->step - ++ old_sel * rdev->desc->linear_ranges->step); ++ switch (id) { ++ case BUCK1: ++ case LDO1: ++ case LDO2: ++ ret = DIV_ROUND_CLOSEST(uV_delta * us_ramp[val], ++ mcp16502_ramp_b1l12[val]); ++ break; ++ ++ case BUCK2: ++ case BUCK3: ++ case BUCK4: ++ ret = DIV_ROUND_CLOSEST(uV_delta * us_ramp[val], ++ mcp16502_ramp_b234[val]); ++ break; ++ ++ default: ++ return -EINVAL; ++ } ++ ++ return ret; ++} ++ ++static int mcp16502_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) ++{ ++ const int *ramp; ++ int id = rdev_get_id(rdev); ++ unsigned int i, size; ++ ++ switch (id) { ++ case BUCK1: ++ case LDO1: ++ case LDO2: ++ ramp = mcp16502_ramp_b1l12; ++ size = ARRAY_SIZE(mcp16502_ramp_b1l12); ++ break; ++ ++ case BUCK2: ++ case BUCK3: ++ case BUCK4: ++ ramp = mcp16502_ramp_b234; ++ size = ARRAY_SIZE(mcp16502_ramp_b234); ++ break; ++ ++ default: ++ return -EINVAL; ++ } ++ ++ for (i = 0; i < size; i++) { ++ if (ramp[i] == ramp_delay) ++ break; ++ } ++ if (i == size) ++ return -EINVAL; ++ ++ return regmap_update_bits(rdev->regmap, MCP16502_REG_BASE(id, CFG), ++ MCP16502_DVSR, (i << 2)); ++} ++ + #ifdef CONFIG_SUSPEND + /* + * mcp16502_suspend_get_target_reg() - get the reg of the target suspend PMIC +@@ -365,6 +446,8 @@ static const struct regulator_ops mcp16502_buck_ops = { + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .get_status = mcp16502_get_status, ++ .set_voltage_time_sel = mcp16502_set_voltage_time_sel, ++ .set_ramp_delay = mcp16502_set_ramp_delay, + + .set_mode = mcp16502_set_mode, + .get_mode = mcp16502_get_mode, +@@ -389,6 +472,8 @@ static const struct regulator_ops mcp16502_ldo_ops = { + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .get_status = mcp16502_get_status, ++ .set_voltage_time_sel = mcp16502_set_voltage_time_sel, ++ .set_ramp_delay = mcp16502_set_ramp_delay, + + #ifdef CONFIG_SUSPEND + .set_suspend_voltage = mcp16502_set_suspend_voltage, +-- +2.32.0 + |