[U-Boot] [PATCH v1 1/4] power: regulator: stpmu1: Introduce stpmu1 driver
Patrice Chotard
patrice.chotard at st.com
Wed Apr 4 12:30:40 UTC 2018
From: Christophe Kerello <christophe.kerello at st.com>
Enable support for the regulator functions of the STPMU1X PMIC. The
driver implements get/set api for the various BUCKS and LDOs supported
by the PMIC device. This driver is controlled by a device tree node
which includes voltage limits.
Signed-off-by: Christophe Kerello <christophe.kerello at st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
Signed-off-by: Patrice Chotard <patrice.chotard at st.com>
---
drivers/power/regulator/Kconfig | 9 +
drivers/power/regulator/Makefile | 1 +
drivers/power/regulator/stpmu1.c | 670 +++++++++++++++++++++++++++++++++++++++
3 files changed, 680 insertions(+)
create mode 100644 drivers/power/regulator/stpmu1.c
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 5b4ac10462b4..822cff6608b8 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -204,3 +204,12 @@ config DM_REGULATOR_TPS65910
The TPS65910 PMIC provides 4 SMPSs and 8 LDOs. This driver supports all
regulator types of the TPS65910 (BUCK, BOOST and LDO). It implements
the get/set api for value and enable.
+
+config DM_REGULATOR_STPMU1
+ bool "Enable driver for STPMU1 regulators"
+ depends on DM_REGULATOR && PMIC_STPMU1
+ ---help---
+ Enable support for the regulator functions of the STPMU1 PMIC. The
+ driver implements get/set api for the various BUCKS and LDOs supported
+ by the PMIC device. This driver is controlled by a device tree node
+ which includes voltage limits.
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index f7873ad27af1..d73a6e3577a9 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -23,3 +23,4 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR_PBIAS) += pbias_regulator.o
obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP873X) += lp873x_regulator.o
obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP87565) += lp87565_regulator.o
obj-$(CONFIG_DM_REGULATOR_TPS65910) += tps65910_regulator.o
+obj-$(CONFIG_$(SPL_)DM_REGULATOR_STPMU1) += stpmu1.o
diff --git a/drivers/power/regulator/stpmu1.c b/drivers/power/regulator/stpmu1.c
new file mode 100644
index 000000000000..377958387b86
--- /dev/null
+++ b/drivers/power/regulator/stpmu1.c
@@ -0,0 +1,670 @@
+/*
+ * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
+ * Author: Christophe Kerello <christophe.kerello at st.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+#include <power/stpmu1.h>
+
+struct stpmu1_range {
+ int min_uv;
+ int min_sel;
+ int max_sel;
+ int step;
+};
+
+struct stpmu1_output_range {
+ const struct stpmu1_range *ranges;
+ int nbranges;
+};
+
+#define STPMU1_MODE(_id, _val, _name) { \
+ .id = _id, \
+ .register_value = _val, \
+ .name = _name, \
+}
+
+#define STPMU1_RANGE(_min_uv, _min_sel, _max_sel, _step) { \
+ .min_uv = _min_uv, \
+ .min_sel = _min_sel, \
+ .max_sel = _max_sel, \
+ .step = _step, \
+}
+
+#define STPMU1_OUTPUT_RANGE(_ranges, _nbranges) { \
+ .ranges = _ranges, \
+ .nbranges = _nbranges, \
+}
+
+static int stpmu1_output_find_uv(
+ int sel,
+ const struct stpmu1_output_range *output_range)
+{
+ const struct stpmu1_range *range;
+ int i;
+
+ for (i = 0, range = output_range->ranges;
+ i < output_range->nbranges; i++, range++) {
+ if (sel >= range->min_sel && sel <= range->max_sel)
+ return range->min_uv +
+ (sel - range->min_sel) * range->step;
+ }
+
+ return -EINVAL;
+}
+
+static int stpmu1_output_find_sel(
+ int uv,
+ const struct stpmu1_output_range *output_range)
+{
+ const struct stpmu1_range *range;
+ int i;
+
+ for (i = 0, range = output_range->ranges;
+ i < output_range->nbranges; i++, range++) {
+ if (uv == range->min_uv && !range->step)
+ return range->min_sel;
+
+ if (uv >= range->min_uv &&
+ uv <= range->min_uv +
+ (range->max_sel - range->min_sel) * range->step)
+ return range->min_sel +
+ (uv - range->min_uv) / range->step;
+ }
+
+ return -EINVAL;
+}
+
+/*
+ * BUCK regulators
+ */
+
+static const struct stpmu1_range buck1_ranges[] = {
+ STPMU1_RANGE(600000, 0, 30, 25000),
+ STPMU1_RANGE(1350000, 31, 63, 0),
+};
+
+static const struct stpmu1_range buck2_ranges[] = {
+ STPMU1_RANGE(1000000, 0, 17, 0),
+ STPMU1_RANGE(1050000, 18, 19, 0),
+ STPMU1_RANGE(1100000, 20, 21, 0),
+ STPMU1_RANGE(1150000, 22, 23, 0),
+ STPMU1_RANGE(1200000, 24, 25, 0),
+ STPMU1_RANGE(1250000, 26, 27, 0),
+ STPMU1_RANGE(1300000, 28, 29, 0),
+ STPMU1_RANGE(1350000, 30, 31, 0),
+ STPMU1_RANGE(1400000, 32, 33, 0),
+ STPMU1_RANGE(1450000, 34, 35, 0),
+ STPMU1_RANGE(1500000, 36, 63, 0),
+};
+
+static const struct stpmu1_range buck3_ranges[] = {
+ STPMU1_RANGE(1000000, 0, 19, 0),
+ STPMU1_RANGE(1100000, 20, 23, 0),
+ STPMU1_RANGE(1200000, 24, 27, 0),
+ STPMU1_RANGE(1300000, 28, 31, 0),
+ STPMU1_RANGE(1400000, 32, 35, 0),
+ STPMU1_RANGE(1500000, 36, 55, 100000),
+ STPMU1_RANGE(3400000, 56, 63, 0),
+};
+
+static const struct stpmu1_range buck4_ranges[] = {
+ STPMU1_RANGE(600000, 0, 27, 25000),
+ STPMU1_RANGE(1300000, 28, 29, 0),
+ STPMU1_RANGE(1350000, 30, 31, 0),
+ STPMU1_RANGE(1400000, 32, 33, 0),
+ STPMU1_RANGE(1450000, 34, 35, 0),
+ STPMU1_RANGE(1500000, 36, 60, 100000),
+ STPMU1_RANGE(3900000, 61, 63, 0),
+};
+
+/* BUCK: 1,2,3,4 - voltage ranges */
+static const struct stpmu1_output_range buck_voltage_range[] = {
+ STPMU1_OUTPUT_RANGE(buck1_ranges, ARRAY_SIZE(buck1_ranges)),
+ STPMU1_OUTPUT_RANGE(buck2_ranges, ARRAY_SIZE(buck2_ranges)),
+ STPMU1_OUTPUT_RANGE(buck3_ranges, ARRAY_SIZE(buck3_ranges)),
+ STPMU1_OUTPUT_RANGE(buck4_ranges, ARRAY_SIZE(buck4_ranges)),
+};
+
+/* BUCK modes */
+static const struct dm_regulator_mode buck_modes[] = {
+ STPMU1_MODE(STPMU1_BUCK_MODE_HP, STPMU1_BUCK_MODE_HP, "HP"),
+ STPMU1_MODE(STPMU1_BUCK_MODE_LP, STPMU1_BUCK_MODE_LP, "LP"),
+};
+
+static int stpmu1_buck_get_uv(struct udevice *dev, int buck)
+{
+ int sel;
+
+ sel = pmic_reg_read(dev, STPMU1_BUCKX_CTRL_REG(buck));
+ if (sel < 0)
+ return sel;
+
+ sel &= STPMU1_BUCK_OUTPUT_MASK;
+ sel >>= STPMU1_BUCK_OUTPUT_SHIFT;
+
+ return stpmu1_output_find_uv(sel, &buck_voltage_range[buck]);
+}
+
+static int stpmu1_buck_get_value(struct udevice *dev)
+{
+ return stpmu1_buck_get_uv(dev->parent, dev->driver_data - 1);
+}
+
+static int stpmu1_buck_set_value(struct udevice *dev, int uv)
+{
+ int sel, buck = dev->driver_data - 1;
+
+ sel = stpmu1_output_find_sel(uv, &buck_voltage_range[buck]);
+ if (sel < 0)
+ return sel;
+
+ return pmic_clrsetbits(dev->parent,
+ STPMU1_BUCKX_CTRL_REG(buck),
+ STPMU1_BUCK_OUTPUT_MASK,
+ sel << STPMU1_BUCK_OUTPUT_SHIFT);
+}
+
+static int stpmu1_buck_get_enable(struct udevice *dev)
+{
+ int ret;
+
+ ret = pmic_reg_read(dev->parent,
+ STPMU1_BUCKX_CTRL_REG(dev->driver_data - 1));
+ if (ret < 0)
+ return false;
+
+ return ret & STPMU1_BUCK_EN ? true : false;
+}
+
+static int stpmu1_buck_set_enable(struct udevice *dev, bool enable)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+ int ret, uv;
+
+ /* if regulator is already in the wanted state, nothing to do */
+ if (stpmu1_buck_get_enable(dev) == enable)
+ return 0;
+
+ if (enable) {
+ uc_pdata = dev_get_uclass_platdata(dev);
+ uv = stpmu1_buck_get_value(dev);
+ if ((uv < uc_pdata->min_uV) || (uv > uc_pdata->max_uV))
+ stpmu1_buck_set_value(dev, uc_pdata->min_uV);
+ }
+
+ ret = pmic_clrsetbits(dev->parent,
+ STPMU1_BUCKX_CTRL_REG(dev->driver_data - 1),
+ STPMU1_BUCK_EN, enable ? STPMU1_BUCK_EN : 0);
+ if (enable)
+ mdelay(STPMU1_DEFAULT_START_UP_DELAY_MS);
+
+ return ret;
+}
+
+static int stpmu1_buck_get_mode(struct udevice *dev)
+{
+ int ret;
+
+ ret = pmic_reg_read(dev->parent,
+ STPMU1_BUCKX_CTRL_REG(dev->driver_data - 1));
+ if (ret < 0)
+ return ret;
+
+ return ret & STPMU1_BUCK_MODE ? STPMU1_BUCK_MODE_LP :
+ STPMU1_BUCK_MODE_HP;
+}
+
+static int stpmu1_buck_set_mode(struct udevice *dev, int mode)
+{
+ return pmic_clrsetbits(dev->parent,
+ STPMU1_BUCKX_CTRL_REG(dev->driver_data - 1),
+ STPMU1_BUCK_MODE,
+ mode ? STPMU1_BUCK_MODE : 0);
+}
+
+static int stpmu1_buck_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ if (!dev->driver_data || dev->driver_data > STPMU1_MAX_BUCK)
+ return -EINVAL;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+
+ uc_pdata->type = REGULATOR_TYPE_BUCK;
+ uc_pdata->mode = (struct dm_regulator_mode *)buck_modes;
+ uc_pdata->mode_count = ARRAY_SIZE(buck_modes);
+
+ return 0;
+}
+
+static const struct dm_regulator_ops stpmu1_buck_ops = {
+ .get_value = stpmu1_buck_get_value,
+ .set_value = stpmu1_buck_set_value,
+ .get_enable = stpmu1_buck_get_enable,
+ .set_enable = stpmu1_buck_set_enable,
+ .get_mode = stpmu1_buck_get_mode,
+ .set_mode = stpmu1_buck_set_mode,
+};
+
+U_BOOT_DRIVER(stpmu1_buck) = {
+ .name = "stpmu1_buck",
+ .id = UCLASS_REGULATOR,
+ .ops = &stpmu1_buck_ops,
+ .probe = stpmu1_buck_probe,
+};
+
+/*
+ * LDO regulators
+ */
+
+static const struct stpmu1_range ldo12_ranges[] = {
+ STPMU1_RANGE(1700000, 0, 7, 0),
+ STPMU1_RANGE(1700000, 8, 24, 100000),
+ STPMU1_RANGE(3300000, 25, 31, 0),
+};
+
+static const struct stpmu1_range ldo3_ranges[] = {
+ STPMU1_RANGE(1700000, 0, 7, 0),
+ STPMU1_RANGE(1700000, 8, 24, 100000),
+ STPMU1_RANGE(3300000, 25, 30, 0),
+ /* Sel 31 is special case when LDO3 is in mode sync_source (BUCK2/2) */
+};
+
+static const struct stpmu1_range ldo5_ranges[] = {
+ STPMU1_RANGE(1700000, 0, 7, 0),
+ STPMU1_RANGE(1700000, 8, 30, 100000),
+ STPMU1_RANGE(3900000, 31, 31, 0),
+};
+
+static const struct stpmu1_range ldo6_ranges[] = {
+ STPMU1_RANGE(900000, 0, 24, 100000),
+ STPMU1_RANGE(3300000, 25, 31, 0),
+};
+
+/* LDO: 1,2,3,4,5,6 - voltage ranges */
+static const struct stpmu1_output_range ldo_voltage_range[] = {
+ STPMU1_OUTPUT_RANGE(ldo12_ranges, ARRAY_SIZE(ldo12_ranges)),
+ STPMU1_OUTPUT_RANGE(ldo12_ranges, ARRAY_SIZE(ldo12_ranges)),
+ STPMU1_OUTPUT_RANGE(ldo3_ranges, ARRAY_SIZE(ldo3_ranges)),
+ STPMU1_OUTPUT_RANGE(NULL, 0),
+ STPMU1_OUTPUT_RANGE(ldo5_ranges, ARRAY_SIZE(ldo5_ranges)),
+ STPMU1_OUTPUT_RANGE(ldo6_ranges, ARRAY_SIZE(ldo6_ranges)),
+};
+
+/* LDO modes */
+static const struct dm_regulator_mode ldo_modes[] = {
+ STPMU1_MODE(STPMU1_LDO_MODE_NORMAL,
+ STPMU1_LDO_MODE_NORMAL, "NORMAL"),
+ STPMU1_MODE(STPMU1_LDO_MODE_BYPASS,
+ STPMU1_LDO_MODE_BYPASS, "BYPASS"),
+ STPMU1_MODE(STPMU1_LDO_MODE_SINK_SOURCE,
+ STPMU1_LDO_MODE_SINK_SOURCE, "SINK SOURCE"),
+};
+
+static int stpmu1_ldo_get_value(struct udevice *dev)
+{
+ int sel, ldo = dev->driver_data - 1;
+
+ sel = pmic_reg_read(dev->parent, STPMU1_LDOX_CTRL_REG(ldo));
+ if (sel < 0)
+ return sel;
+
+ /* ldo4 => 3,3V */
+ if (ldo == STPMU1_LDO4)
+ return STPMU1_LDO4_UV;
+
+ sel &= STPMU1_LDO12356_OUTPUT_MASK;
+ sel >>= STPMU1_LDO12356_OUTPUT_SHIFT;
+
+ /* ldo3, sel = 31 => BUCK2/2 */
+ if (ldo == STPMU1_LDO3 && sel == STPMU1_LDO3_DDR_SEL)
+ return stpmu1_buck_get_uv(dev->parent, STPMU1_BUCK2) / 2;
+
+ return stpmu1_output_find_uv(sel, &ldo_voltage_range[ldo]);
+}
+
+static int stpmu1_ldo_set_value(struct udevice *dev, int uv)
+{
+ int sel, ldo = dev->driver_data - 1;
+
+ /* ldo4 => not possible */
+ if (ldo == STPMU1_LDO4)
+ return -EINVAL;
+
+ sel = stpmu1_output_find_sel(uv, &ldo_voltage_range[ldo]);
+ if (sel < 0)
+ return sel;
+
+ return pmic_clrsetbits(dev->parent,
+ STPMU1_LDOX_CTRL_REG(ldo),
+ STPMU1_LDO12356_OUTPUT_MASK,
+ sel << STPMU1_LDO12356_OUTPUT_SHIFT);
+}
+
+static int stpmu1_ldo_get_enable(struct udevice *dev)
+{
+ int ret;
+
+ ret = pmic_reg_read(dev->parent,
+ STPMU1_LDOX_CTRL_REG(dev->driver_data - 1));
+ if (ret < 0)
+ return false;
+
+ return ret & STPMU1_LDO_EN ? true : false;
+}
+
+static int stpmu1_ldo_set_enable(struct udevice *dev, bool enable)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+ int ret, uv;
+
+ /* if regulator is already in the wanted state, nothing to do */
+ if (stpmu1_ldo_get_enable(dev) == enable)
+ return 0;
+
+ if (enable) {
+ uc_pdata = dev_get_uclass_platdata(dev);
+ uv = stpmu1_ldo_get_value(dev);
+ if ((uv < uc_pdata->min_uV) || (uv > uc_pdata->max_uV))
+ stpmu1_ldo_set_value(dev, uc_pdata->min_uV);
+ }
+
+ ret = pmic_clrsetbits(dev->parent,
+ STPMU1_LDOX_CTRL_REG(dev->driver_data - 1),
+ STPMU1_LDO_EN, enable ? STPMU1_LDO_EN : 0);
+ if (enable)
+ mdelay(STPMU1_DEFAULT_START_UP_DELAY_MS);
+
+ return ret;
+}
+
+static int stpmu1_ldo_get_mode(struct udevice *dev)
+{
+ int ret, ldo = dev->driver_data - 1;
+
+ if (ldo != STPMU1_LDO3)
+ return -EINVAL;
+
+ ret = pmic_reg_read(dev->parent, STPMU1_LDOX_CTRL_REG(ldo));
+ if (ret < 0)
+ return ret;
+
+ if (ret & STPMU1_LDO3_MODE)
+ return STPMU1_LDO_MODE_BYPASS;
+
+ ret &= STPMU1_LDO12356_OUTPUT_MASK;
+ ret >>= STPMU1_LDO12356_OUTPUT_SHIFT;
+
+ return ret == STPMU1_LDO3_DDR_SEL ? STPMU1_LDO_MODE_SINK_SOURCE :
+ STPMU1_LDO_MODE_NORMAL;
+}
+
+static int stpmu1_ldo_set_mode(struct udevice *dev, int mode)
+{
+ int ret, ldo = dev->driver_data - 1;
+
+ if (ldo != STPMU1_LDO3)
+ return -EINVAL;
+
+ ret = pmic_reg_read(dev->parent, STPMU1_LDOX_CTRL_REG(ldo));
+ if (ret < 0)
+ return ret;
+
+ switch (mode) {
+ case STPMU1_LDO_MODE_SINK_SOURCE:
+ ret &= ~STPMU1_LDO12356_OUTPUT_MASK;
+ ret |= STPMU1_LDO3_DDR_SEL << STPMU1_LDO12356_OUTPUT_SHIFT;
+ case STPMU1_LDO_MODE_NORMAL:
+ ret &= ~STPMU1_LDO3_MODE;
+ break;
+ case STPMU1_LDO_MODE_BYPASS:
+ ret |= STPMU1_LDO3_MODE;
+ break;
+ }
+
+ return pmic_reg_write(dev->parent, STPMU1_LDOX_CTRL_REG(ldo), ret);
+}
+
+static int stpmu1_ldo_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ if (!dev->driver_data || dev->driver_data > STPMU1_MAX_LDO)
+ return -EINVAL;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+
+ uc_pdata->type = REGULATOR_TYPE_LDO;
+ if (dev->driver_data - 1 == STPMU1_LDO3) {
+ uc_pdata->mode = (struct dm_regulator_mode *)ldo_modes;
+ uc_pdata->mode_count = ARRAY_SIZE(ldo_modes);
+ } else {
+ uc_pdata->mode_count = 0;
+ }
+
+ return 0;
+}
+
+static const struct dm_regulator_ops stpmu1_ldo_ops = {
+ .get_value = stpmu1_ldo_get_value,
+ .set_value = stpmu1_ldo_set_value,
+ .get_enable = stpmu1_ldo_get_enable,
+ .set_enable = stpmu1_ldo_set_enable,
+ .get_mode = stpmu1_ldo_get_mode,
+ .set_mode = stpmu1_ldo_set_mode,
+};
+
+U_BOOT_DRIVER(stpmu1_ldo) = {
+ .name = "stpmu1_ldo",
+ .id = UCLASS_REGULATOR,
+ .ops = &stpmu1_ldo_ops,
+ .probe = stpmu1_ldo_probe,
+};
+
+/*
+ * VREF DDR regulator
+ */
+
+static int stpmu1_vref_ddr_get_value(struct udevice *dev)
+{
+ /* BUCK2/2 */
+ return stpmu1_buck_get_uv(dev->parent, STPMU1_BUCK2) / 2;
+}
+
+static int stpmu1_vref_ddr_get_enable(struct udevice *dev)
+{
+ int ret;
+
+ ret = pmic_reg_read(dev->parent, STPMU1_VREF_CTRL_REG);
+ if (ret < 0)
+ return false;
+
+ return ret & STPMU1_VREF_EN ? true : false;
+}
+
+static int stpmu1_vref_ddr_set_enable(struct udevice *dev, bool enable)
+{
+ int ret;
+
+ /* if regulator is already in the wanted state, nothing to do */
+ if (stpmu1_vref_ddr_get_enable(dev) == enable)
+ return 0;
+
+ ret = pmic_clrsetbits(dev->parent, STPMU1_VREF_CTRL_REG,
+ STPMU1_VREF_EN, enable ? STPMU1_VREF_EN : 0);
+ if (enable)
+ mdelay(STPMU1_DEFAULT_START_UP_DELAY_MS);
+
+ return ret;
+}
+
+static int stpmu1_vref_ddr_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+
+ uc_pdata->type = REGULATOR_TYPE_FIXED;
+ uc_pdata->mode_count = 0;
+
+ return 0;
+}
+
+static const struct dm_regulator_ops stpmu1_vref_ddr_ops = {
+ .get_value = stpmu1_vref_ddr_get_value,
+ .get_enable = stpmu1_vref_ddr_get_enable,
+ .set_enable = stpmu1_vref_ddr_set_enable,
+};
+
+U_BOOT_DRIVER(stpmu1_vref_ddr) = {
+ .name = "stpmu1_vref_ddr",
+ .id = UCLASS_REGULATOR,
+ .ops = &stpmu1_vref_ddr_ops,
+ .probe = stpmu1_vref_ddr_probe,
+};
+
+/*
+ * BOOST regulator
+ */
+
+static int stpmu1_boost_get_enable(struct udevice *dev)
+{
+ int ret;
+
+ ret = pmic_reg_read(dev->parent, STPMU1_USB_CTRL_REG);
+ if (ret < 0)
+ return false;
+
+ return ret & STPMU1_USB_BOOST_EN ? true : false;
+}
+
+static int stpmu1_boost_set_enable(struct udevice *dev, bool enable)
+{
+ int ret;
+
+ ret = pmic_reg_read(dev->parent, STPMU1_USB_CTRL_REG);
+ if (ret < 0)
+ return ret;
+
+ if (!enable && ret & STPMU1_USB_PWR_SW_EN)
+ return -EINVAL;
+
+ /* if regulator is already in the wanted state, nothing to do */
+ if (!!(ret & STPMU1_USB_BOOST_EN) == enable)
+ return 0;
+
+ ret = pmic_clrsetbits(dev->parent, STPMU1_USB_CTRL_REG,
+ STPMU1_USB_BOOST_EN,
+ enable ? STPMU1_USB_BOOST_EN : 0);
+ if (enable)
+ mdelay(STPMU1_USB_BOOST_START_UP_DELAY_MS);
+
+ return ret;
+}
+
+static int stpmu1_boost_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+
+ uc_pdata->type = REGULATOR_TYPE_FIXED;
+ uc_pdata->mode_count = 0;
+
+ return 0;
+}
+
+static const struct dm_regulator_ops stpmu1_boost_ops = {
+ .get_enable = stpmu1_boost_get_enable,
+ .set_enable = stpmu1_boost_set_enable,
+};
+
+U_BOOT_DRIVER(stpmu1_boost) = {
+ .name = "stpmu1_boost",
+ .id = UCLASS_REGULATOR,
+ .ops = &stpmu1_boost_ops,
+ .probe = stpmu1_boost_probe,
+};
+
+/*
+ * USB power switch
+ */
+
+static int stpmu1_pwr_sw_get_enable(struct udevice *dev)
+{
+ uint mask = 1 << dev->driver_data;
+ int ret;
+
+ ret = pmic_reg_read(dev->parent, STPMU1_USB_CTRL_REG);
+ if (ret < 0)
+ return false;
+
+ return ret & mask ? true : false;
+}
+
+static int stpmu1_pwr_sw_set_enable(struct udevice *dev, bool enable)
+{
+ uint mask = 1 << dev->driver_data;
+ int ret;
+
+ ret = pmic_reg_read(dev->parent, STPMU1_USB_CTRL_REG);
+ if (ret < 0)
+ return ret;
+
+ /* if regulator is already in the wanted state, nothing to do */
+ if (!!(ret & mask) == enable)
+ return 0;
+
+ /* Boost management */
+ if (enable && !(ret & STPMU1_USB_BOOST_EN)) {
+ pmic_clrsetbits(dev->parent, STPMU1_USB_CTRL_REG,
+ STPMU1_USB_BOOST_EN, STPMU1_USB_BOOST_EN);
+ mdelay(STPMU1_USB_BOOST_START_UP_DELAY_MS);
+ } else if (!enable && ret & STPMU1_USB_BOOST_EN &&
+ (ret & STPMU1_USB_PWR_SW_EN) != STPMU1_USB_PWR_SW_EN) {
+ pmic_clrsetbits(dev->parent, STPMU1_USB_CTRL_REG,
+ STPMU1_USB_BOOST_EN, 0);
+ }
+
+ ret = pmic_clrsetbits(dev->parent, STPMU1_USB_CTRL_REG,
+ mask, enable ? mask : 0);
+ if (enable)
+ mdelay(STPMU1_DEFAULT_START_UP_DELAY_MS);
+
+ return ret;
+}
+
+static int stpmu1_pwr_sw_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ if (!dev->driver_data || dev->driver_data > STPMU1_MAX_PWR_SW)
+ return -EINVAL;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+
+ uc_pdata->type = REGULATOR_TYPE_FIXED;
+ uc_pdata->mode_count = 0;
+
+ return 0;
+}
+
+static const struct dm_regulator_ops stpmu1_pwr_sw_ops = {
+ .get_enable = stpmu1_pwr_sw_get_enable,
+ .set_enable = stpmu1_pwr_sw_set_enable,
+};
+
+U_BOOT_DRIVER(stpmu1_pwr_sw) = {
+ .name = "stpmu1_pwr_sw",
+ .id = UCLASS_REGULATOR,
+ .ops = &stpmu1_pwr_sw_ops,
+ .probe = stpmu1_pwr_sw_probe,
+};
--
1.9.1
More information about the U-Boot
mailing list