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regulator: rt4831: Adds support for Richtek RT4831 DSV regulator
Adds support for Richtek RT4831 DSV Regulator Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> Link: https://lore.kernel.org/r/1608217244-314-6-git-send-email-u0084500@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
ChiYuan Huang
Mark Brown
parent
934b05e818
commit
9351ab8b0c
@ -969,6 +969,16 @@ config REGULATOR_RT4801
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This adds support for voltage regulators in Richtek RT4801 Display Bias IC.
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The device supports two regulators (DSVP/DSVN).
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config REGULATOR_RT4831
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tristate "Richtek RT4831 DSV Regulators"
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depends on MFD_RT4831
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help
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This adds support for voltage regulators in Richtek RT4831.
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There are three regulators (VLCM/DSVP/DSVN).
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VLCM is a virtual voltage input for DSVP/DSVN inside IC.
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And DSVP/DSVN is the real Vout range from 4V to 6.5V.
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It's common used to provide the power for the display panel.
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config REGULATOR_RT5033
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tristate "Richtek RT5033 Regulators"
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depends on MFD_RT5033
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@ -118,6 +118,7 @@ obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o
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obj-$(CONFIG_REGULATOR_RN5T618) += rn5t618-regulator.o
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obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o
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obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o
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obj-$(CONFIG_REGULATOR_RT4831) += rt4831-regulator.o
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obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o
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obj-$(CONFIG_REGULATOR_RTMV20) += rtmv20-regulator.o
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obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
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198
drivers/regulator/rt4831-regulator.c
Normal file
198
drivers/regulator/rt4831-regulator.c
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@ -0,0 +1,198 @@
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// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/bitops.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/regulator/driver.h>
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enum {
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DSV_OUT_VLCM = 0,
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DSV_OUT_VPOS,
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DSV_OUT_VNEG,
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DSV_OUT_MAX
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};
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#define RT4831_REG_DSVEN 0x09
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#define RT4831_REG_VLCM 0x0c
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#define RT4831_REG_VPOS 0x0d
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#define RT4831_REG_VNEG 0x0e
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#define RT4831_REG_FLAGS 0x0f
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#define RT4831_VOLT_MASK GENMASK(5, 0)
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#define RT4831_DSVMODE_SHIFT 5
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#define RT4831_DSVMODE_MASK GENMASK(7, 5)
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#define RT4831_POSADEN_MASK BIT(4)
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#define RT4831_NEGADEN_MASK BIT(3)
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#define RT4831_POSEN_MASK BIT(2)
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#define RT4831_NEGEN_MASK BIT(1)
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#define RT4831_OTP_MASK BIT(6)
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#define RT4831_LCMOVP_MASK BIT(5)
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#define RT4831_VPOSSCP_MASK BIT(3)
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#define RT4831_VNEGSCP_MASK BIT(2)
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#define DSV_MODE_NORMAL (0x4 << RT4831_DSVMODE_SHIFT)
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#define DSV_MODE_BYPASS (0x6 << RT4831_DSVMODE_SHIFT)
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#define STEP_UV 50000
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#define VLCM_MIN_UV 4000000
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#define VLCM_MAX_UV 7150000
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#define VLCM_N_VOLTAGES ((VLCM_MAX_UV - VLCM_MIN_UV) / STEP_UV + 1)
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#define VPN_MIN_UV 4000000
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#define VPN_MAX_UV 6500000
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#define VPN_N_VOLTAGES ((VPN_MAX_UV - VPN_MIN_UV) / STEP_UV + 1)
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static int rt4831_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
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{
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struct regmap *regmap = rdev_get_regmap(rdev);
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int rid = rdev_get_id(rdev);
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unsigned int val, events = 0;
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int ret;
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ret = regmap_read(regmap, RT4831_REG_FLAGS, &val);
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if (ret)
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return ret;
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if (val & RT4831_OTP_MASK)
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events |= REGULATOR_ERROR_OVER_TEMP;
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if (rid == DSV_OUT_VLCM && (val & RT4831_LCMOVP_MASK))
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events |= REGULATOR_ERROR_OVER_CURRENT;
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if (rid == DSV_OUT_VPOS && (val & RT4831_VPOSSCP_MASK))
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events |= REGULATOR_ERROR_OVER_CURRENT;
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if (rid == DSV_OUT_VNEG && (val & RT4831_VNEGSCP_MASK))
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events |= REGULATOR_ERROR_OVER_CURRENT;
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*flags = events;
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return 0;
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}
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static const struct regulator_ops rt4831_dsvlcm_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_bypass = regulator_set_bypass_regmap,
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.get_bypass = regulator_get_bypass_regmap,
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.get_error_flags = rt4831_get_error_flags,
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};
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static const struct regulator_ops rt4831_dsvpn_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.set_active_discharge = regulator_set_active_discharge_regmap,
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.get_error_flags = rt4831_get_error_flags,
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};
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static const struct regulator_desc rt4831_regulator_descs[] = {
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{
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.name = "DSVLCM",
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.ops = &rt4831_dsvlcm_ops,
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.of_match = of_match_ptr("DSVLCM"),
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.regulators_node = of_match_ptr("regulators"),
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.type = REGULATOR_VOLTAGE,
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.id = DSV_OUT_VLCM,
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.n_voltages = VLCM_N_VOLTAGES,
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.min_uV = VLCM_MIN_UV,
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.uV_step = STEP_UV,
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.vsel_reg = RT4831_REG_VLCM,
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.vsel_mask = RT4831_VOLT_MASK,
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.bypass_reg = RT4831_REG_DSVEN,
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.bypass_val_on = DSV_MODE_BYPASS,
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.bypass_val_off = DSV_MODE_NORMAL,
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},
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{
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.name = "DSVP",
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.ops = &rt4831_dsvpn_ops,
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.of_match = of_match_ptr("DSVP"),
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.regulators_node = of_match_ptr("regulators"),
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.type = REGULATOR_VOLTAGE,
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.id = DSV_OUT_VPOS,
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.n_voltages = VPN_N_VOLTAGES,
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.min_uV = VPN_MIN_UV,
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.uV_step = STEP_UV,
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.vsel_reg = RT4831_REG_VPOS,
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.vsel_mask = RT4831_VOLT_MASK,
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.enable_reg = RT4831_REG_DSVEN,
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.enable_mask = RT4831_POSEN_MASK,
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.active_discharge_reg = RT4831_REG_DSVEN,
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.active_discharge_mask = RT4831_POSADEN_MASK,
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},
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{
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.name = "DSVN",
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.ops = &rt4831_dsvpn_ops,
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.of_match = of_match_ptr("DSVN"),
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.regulators_node = of_match_ptr("regulators"),
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.type = REGULATOR_VOLTAGE,
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.id = DSV_OUT_VNEG,
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.n_voltages = VPN_N_VOLTAGES,
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.min_uV = VPN_MIN_UV,
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.uV_step = STEP_UV,
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.vsel_reg = RT4831_REG_VNEG,
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.vsel_mask = RT4831_VOLT_MASK,
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.enable_reg = RT4831_REG_DSVEN,
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.enable_mask = RT4831_NEGEN_MASK,
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.active_discharge_reg = RT4831_REG_DSVEN,
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.active_discharge_mask = RT4831_NEGADEN_MASK,
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}
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};
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static int rt4831_regulator_probe(struct platform_device *pdev)
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{
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struct regmap *regmap;
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struct regulator_dev *rdev;
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struct regulator_config config = {};
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int i, ret;
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regmap = dev_get_regmap(pdev->dev.parent, NULL);
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if (IS_ERR(regmap)) {
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dev_err(&pdev->dev, "Failed to init regmap\n");
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return PTR_ERR(regmap);
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}
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/* Configure DSV mode to normal by default */
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ret = regmap_update_bits(regmap, RT4831_REG_DSVEN, RT4831_DSVMODE_MASK, DSV_MODE_NORMAL);
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if (ret) {
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dev_err(&pdev->dev, "Failed to configure dsv mode to normal\n");
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return ret;
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}
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config.dev = pdev->dev.parent;
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config.regmap = regmap;
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for (i = 0; i < DSV_OUT_MAX; i++) {
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rdev = devm_regulator_register(&pdev->dev, rt4831_regulator_descs + i, &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "Failed to register %d regulator\n", i);
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return PTR_ERR(rdev);
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}
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}
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return 0;
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}
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static const struct platform_device_id rt4831_regulator_match[] = {
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{ "rt4831-regulator", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(platform, rt4831_regulator_match);
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static struct platform_driver rt4831_regulator_driver = {
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.driver = {
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.name = "rt4831-regulator",
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},
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.id_table = rt4831_regulator_match,
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.probe = rt4831_regulator_probe,
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};
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module_platform_driver(rt4831_regulator_driver);
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MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
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MODULE_LICENSE("GPL v2");
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