--- /dev/null
+Hisilicon Hi655x Voltage regulators
+
+Note:
+The Hi655x regulator control is managed by Hi655x PMIC.
+So the node of this regulator must be child node of Hi655x
+PMIC node.
+
+The driver uses the regulator core framework, so please also
+take the bindings of regulator.txt for reference.
+
+The valid names for regulators are:
+
+LDO2_2V8 LDO7_SDIO LDO10_2V85 LDO13_1V8 LDO14_2V8
+LDO15_1V8 LDO17_2V5 LDO19_3V0 LDO21_1V8 LDO22_1V2
+
+Example:
+ pmic: pmic@f8000000 {
+ compatible = "hisilicon,hi655x-pmic";
+ ...
+ regulators {
+ ldo2: LDO2@a21 {
+ regulator-name = "LDO2_2V8";
+ regulator-min-microvolt = <2500000>;
+ regulator-max-microvolt = <3200000>;
+ regulator-enable-ramp-delay = <120>;
+ };
+ ...
+ }
+ }
- ti,dvs-gpio: GPIO specifier for external DVS pin control of LP872x devices.
- ti,dvs-vsel: DVS selector. 0 = SEL_V1, 1 = SEL_V2.
- ti,dvs-state: initial DVS pin state. 0 = DVS_LOW, 1 = DVS_HIGH.
+ - enable-gpios: GPIO specifier for EN pin control of LP872x devices.
Sub nodes for regulator_init_data
LP8720 has maximum 6 nodes. (child name: ldo1 ~ 5 and buck)
any consumer request.
- regulator-pull-down: Enable pull down resistor when the regulator is disabled.
- regulator-over-current-protection: Enable over current protection.
+- regulator-active-discharge: tristate, enable/disable active discharge of
+ regulators. The values are:
+ 0: Disable active discharge.
+ 1: Enable active discharge.
+ Absence of this property will leave configuration to default.
Deprecated properties:
- regulator-compatible: If a regulator chip contains multiple
21 general purpose LDOs, 3 dedicated LDOs, and 5 BUCKs. All
of them come with support to either ECO (idle) or sleep mode.
+config REGULATOR_HI655X
+ tristate "Hisilicon HI655X PMIC regulators support"
+ depends on ARCH_HISI || COMPILE_TEST
+ depends on MFD_HI655X_PMIC && OF
+ help
+ This driver provides support for the voltage regulators of the
+ Hisilicon Hi655x PMIC device.
+
config REGULATOR_ISL9305
tristate "Intersil ISL9305 regulator"
depends on I2C
obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o
obj-$(CONFIG_REGULATOR_GPIO) += gpio-regulator.o
obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o
+obj-$(CONFIG_REGULATOR_HI655X) += hi655x-regulator.o
obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
obj-$(CONFIG_REGULATOR_ISL9305) += isl9305.o
obj-$(CONFIG_REGULATOR_LM363X) += lm363x-regulator.o
}
}
+ if (rdev->constraints->active_discharge && ops->set_active_discharge) {
+ bool ad_state = (rdev->constraints->active_discharge ==
+ REGULATOR_ACTIVE_DISCHARGE_ENABLE) ? true : false;
+
+ ret = ops->set_active_discharge(rdev, ad_state);
+ if (ret < 0) {
+ rdev_err(rdev, "failed to set active discharge\n");
+ return ret;
+ }
+ }
+
print_constraints(rdev);
return 0;
}
return 0;
}
+static int fan53555_set_suspend_enable(struct regulator_dev *rdev)
+{
+ struct fan53555_device_info *di = rdev_get_drvdata(rdev);
+
+ return regmap_update_bits(di->regmap, di->sleep_reg,
+ VSEL_BUCK_EN, VSEL_BUCK_EN);
+}
+
+static int fan53555_set_suspend_disable(struct regulator_dev *rdev)
+{
+ struct fan53555_device_info *di = rdev_get_drvdata(rdev);
+
+ return regmap_update_bits(di->regmap, di->sleep_reg,
+ VSEL_BUCK_EN, 0);
+}
+
static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
struct fan53555_device_info *di = rdev_get_drvdata(rdev);
.set_mode = fan53555_set_mode,
.get_mode = fan53555_get_mode,
.set_ramp_delay = fan53555_set_ramp,
+ .set_suspend_enable = fan53555_set_suspend_enable,
+ .set_suspend_disable = fan53555_set_suspend_disable,
};
static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
drvdata->nr_gpios = config->nr_gpios;
ret = gpio_request_array(drvdata->gpios, drvdata->nr_gpios);
if (ret) {
- dev_err(&pdev->dev,
- "Could not obtain regulator setting GPIOs: %d\n", ret);
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev,
+ "Could not obtain regulator setting GPIOs: %d\n",
+ ret);
goto err_memstate;
}
}
return 0;
}
EXPORT_SYMBOL_GPL(regulator_get_bypass_regmap);
+
+/**
+ * regulator_set_active_discharge_regmap - Default set_active_discharge()
+ * using regmap
+ *
+ * @rdev: device to operate on.
+ * @enable: state to set, 0 to disable and 1 to enable.
+ */
+int regulator_set_active_discharge_regmap(struct regulator_dev *rdev,
+ bool enable)
+{
+ unsigned int val;
+
+ if (enable)
+ val = rdev->desc->active_discharge_on;
+ else
+ val = rdev->desc->active_discharge_off;
+
+ return regmap_update_bits(rdev->regmap,
+ rdev->desc->active_discharge_reg,
+ rdev->desc->active_discharge_mask, val);
+}
+EXPORT_SYMBOL_GPL(regulator_set_active_discharge_regmap);
--- /dev/null
+/*
+ * Device driver for regulators in Hi655x IC
+ *
+ * Copyright (c) 2016 Hisilicon.
+ *
+ * Authors:
+ * Chen Feng <puck.chen@hisilicon.com>
+ * Fei Wang <w.f@huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/hi655x-pmic.h>
+
+struct hi655x_regulator {
+ unsigned int disable_reg;
+ unsigned int status_reg;
+ unsigned int ctrl_regs;
+ unsigned int ctrl_mask;
+ struct regulator_desc rdesc;
+};
+
+/* LDO7 & LDO10 */
+static const unsigned int ldo7_voltages[] = {
+ 1800000, 1850000, 2850000, 2900000,
+ 3000000, 3100000, 3200000, 3300000,
+};
+
+static const unsigned int ldo19_voltages[] = {
+ 1800000, 1850000, 1900000, 1750000,
+ 2800000, 2850000, 2900000, 3000000,
+};
+
+static const unsigned int ldo22_voltages[] = {
+ 900000, 1000000, 1050000, 1100000,
+ 1150000, 1175000, 1185000, 1200000,
+};
+
+enum hi655x_regulator_id {
+ HI655X_LDO0,
+ HI655X_LDO1,
+ HI655X_LDO2,
+ HI655X_LDO3,
+ HI655X_LDO4,
+ HI655X_LDO5,
+ HI655X_LDO6,
+ HI655X_LDO7,
+ HI655X_LDO8,
+ HI655X_LDO9,
+ HI655X_LDO10,
+ HI655X_LDO11,
+ HI655X_LDO12,
+ HI655X_LDO13,
+ HI655X_LDO14,
+ HI655X_LDO15,
+ HI655X_LDO16,
+ HI655X_LDO17,
+ HI655X_LDO18,
+ HI655X_LDO19,
+ HI655X_LDO20,
+ HI655X_LDO21,
+ HI655X_LDO22,
+};
+
+static int hi655x_is_enabled(struct regulator_dev *rdev)
+{
+ unsigned int value = 0;
+
+ struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
+
+ regmap_read(rdev->regmap, regulator->status_reg, &value);
+ return (value & BIT(regulator->ctrl_mask));
+}
+
+static int hi655x_disable(struct regulator_dev *rdev)
+{
+ int ret = 0;
+
+ struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
+
+ ret = regmap_write(rdev->regmap, regulator->disable_reg,
+ BIT(regulator->ctrl_mask));
+ return ret;
+}
+
+static struct regulator_ops hi655x_regulator_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = hi655x_disable,
+ .is_enabled = hi655x_is_enabled,
+ .list_voltage = regulator_list_voltage_table,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+};
+
+static struct regulator_ops hi655x_ldo_linear_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = hi655x_disable,
+ .is_enabled = hi655x_is_enabled,
+ .list_voltage = regulator_list_voltage_linear,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+};
+
+#define HI655X_LDO(_ID, vreg, vmask, ereg, dreg, \
+ sreg, cmask, vtable) { \
+ .rdesc = { \
+ .name = #_ID, \
+ .of_match = of_match_ptr(#_ID), \
+ .ops = &hi655x_regulator_ops, \
+ .regulators_node = of_match_ptr("regulators"), \
+ .type = REGULATOR_VOLTAGE, \
+ .id = HI655X_##_ID, \
+ .owner = THIS_MODULE, \
+ .n_voltages = ARRAY_SIZE(vtable), \
+ .volt_table = vtable, \
+ .vsel_reg = HI655X_BUS_ADDR(vreg), \
+ .vsel_mask = vmask, \
+ .enable_reg = HI655X_BUS_ADDR(ereg), \
+ .enable_mask = BIT(cmask), \
+ }, \
+ .disable_reg = HI655X_BUS_ADDR(dreg), \
+ .status_reg = HI655X_BUS_ADDR(sreg), \
+ .ctrl_mask = cmask, \
+}
+
+#define HI655X_LDO_LINEAR(_ID, vreg, vmask, ereg, dreg, \
+ sreg, cmask, minv, nvolt, vstep) { \
+ .rdesc = { \
+ .name = #_ID, \
+ .of_match = of_match_ptr(#_ID), \
+ .ops = &hi655x_ldo_linear_ops, \
+ .regulators_node = of_match_ptr("regulators"), \
+ .type = REGULATOR_VOLTAGE, \
+ .id = HI655X_##_ID, \
+ .owner = THIS_MODULE, \
+ .min_uV = minv, \
+ .n_voltages = nvolt, \
+ .uV_step = vstep, \
+ .vsel_reg = HI655X_BUS_ADDR(vreg), \
+ .vsel_mask = vmask, \
+ .enable_reg = HI655X_BUS_ADDR(ereg), \
+ .enable_mask = BIT(cmask), \
+ }, \
+ .disable_reg = HI655X_BUS_ADDR(dreg), \
+ .status_reg = HI655X_BUS_ADDR(sreg), \
+ .ctrl_mask = cmask, \
+}
+
+static struct hi655x_regulator regulators[] = {
+ HI655X_LDO_LINEAR(LDO2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01,
+ 2500000, 8, 100000),
+ HI655X_LDO(LDO7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages),
+ HI655X_LDO(LDO10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages),
+ HI655X_LDO_LINEAR(LDO13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04,
+ 1600000, 8, 50000),
+ HI655X_LDO_LINEAR(LDO14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05,
+ 2500000, 8, 100000),
+ HI655X_LDO_LINEAR(LDO15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06,
+ 1600000, 8, 50000),
+ HI655X_LDO_LINEAR(LDO17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00,
+ 2500000, 8, 100000),
+ HI655X_LDO(LDO19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages),
+ HI655X_LDO_LINEAR(LDO21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04,
+ 1650000, 8, 50000),
+ HI655X_LDO(LDO22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages),
+};
+
+static int hi655x_regulator_probe(struct platform_device *pdev)
+{
+ unsigned int i;
+ struct hi655x_regulator *regulator;
+ struct hi655x_pmic *pmic;
+ struct regulator_config config = { };
+ struct regulator_dev *rdev;
+
+ pmic = dev_get_drvdata(pdev->dev.parent);
+ if (!pmic) {
+ dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
+ return -ENODEV;
+ }
+
+ regulator = devm_kzalloc(&pdev->dev, sizeof(*regulator), GFP_KERNEL);
+ if (!regulator)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, regulator);
+
+ config.dev = pdev->dev.parent;
+ config.regmap = pmic->regmap;
+ config.driver_data = regulator;
+ for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+ rdev = devm_regulator_register(&pdev->dev,
+ ®ulators[i].rdesc,
+ &config);
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev, "failed to register regulator %s\n",
+ regulator->rdesc.name);
+ return PTR_ERR(rdev);
+ }
+ }
+ return 0;
+}
+
+static struct platform_driver hi655x_regulator_driver = {
+ .driver = {
+ .name = "hi655x-regulator",
+ },
+ .probe = hi655x_regulator_probe,
+};
+module_platform_driver(hi655x_regulator_driver);
+
+MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");
+MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver");
+MODULE_LICENSE("GPL v2");
#include <linux/regmap.h>
#include <linux/err.h>
#include <linux/gpio.h>
+#include <linux/delay.h>
#include <linux/regulator/lp872x.h>
#include <linux/regulator/driver.h>
#include <linux/platform_device.h>
goto set_default_dvs_mode;
gpio = dvs->gpio;
- if (!gpio_is_valid(gpio)) {
- dev_warn(lp->dev, "invalid gpio: %d\n", gpio);
+ if (!gpio_is_valid(gpio))
goto set_default_dvs_mode;
- }
pinstate = dvs->init_state;
ret = devm_gpio_request_one(lp->dev, gpio, pinstate, "LP872X DVS");
default_dvs_mode[lp->chipid]);
}
+static int lp872x_hw_enable(struct lp872x *lp)
+{
+ int ret, gpio;
+
+ if (!lp->pdata)
+ return -EINVAL;
+
+ gpio = lp->pdata->enable_gpio;
+ if (!gpio_is_valid(gpio))
+ return 0;
+
+ /* Always set enable GPIO high. */
+ ret = devm_gpio_request_one(lp->dev, gpio, GPIOF_OUT_INIT_HIGH, "LP872X EN");
+ if (ret) {
+ dev_err(lp->dev, "gpio request err: %d\n", ret);
+ return ret;
+ }
+
+ /* Each chip has a different enable delay. */
+ if (lp->chipid == LP8720)
+ usleep_range(LP8720_ENABLE_DELAY, 1.5 * LP8720_ENABLE_DELAY);
+ else
+ usleep_range(LP8725_ENABLE_DELAY, 1.5 * LP8725_ENABLE_DELAY);
+
+ return 0;
+}
+
static int lp872x_config(struct lp872x *lp)
{
struct lp872x_platform_data *pdata = lp->pdata;
of_property_read_u8(np, "ti,dvs-state", &dvs_state);
pdata->dvs->init_state = dvs_state ? DVS_HIGH : DVS_LOW;
+ pdata->enable_gpio = of_get_named_gpio(np, "enable-gpios", 0);
+
if (of_get_child_count(np) == 0)
goto out;
lp->chipid = id->driver_data;
i2c_set_clientdata(cl, lp);
+ ret = lp872x_hw_enable(lp);
+ if (ret)
+ return ret;
+
ret = lp872x_config(lp);
if (ret)
return ret;
constraints->soft_start = of_property_read_bool(np,
"regulator-soft-start");
+ ret = of_property_read_u32(np, "regulator-active-discharge", &pval);
+ if (!ret) {
+ constraints->active_discharge =
+ (pval) ? REGULATOR_ACTIVE_DISCHARGE_ENABLE :
+ REGULATOR_ACTIVE_DISCHARGE_DISABLE;
+ }
if (!of_property_read_u32(np, "regulator-initial-mode", &pval)) {
if (desc && desc->of_map_mode) {
* @get_current_limit: Get the configured limit for a current-limited regulator.
* @set_input_current_limit: Configure an input limit.
*
+ * @set_active_discharge: Set active discharge enable/disable of regulators.
+ *
* @set_mode: Set the configured operating mode for the regulator.
* @get_mode: Get the configured operating mode for the regulator.
* @get_status: Return actual (not as-configured) status of regulator, as a
int (*set_input_current_limit) (struct regulator_dev *, int lim_uA);
int (*set_over_current_protection) (struct regulator_dev *);
+ int (*set_active_discharge) (struct regulator_dev *, bool enable);
/* enable/disable regulator */
int (*enable) (struct regulator_dev *);
* @bypass_mask: Mask for control when using regmap set_bypass
* @bypass_val_on: Enabling value for control when using regmap set_bypass
* @bypass_val_off: Disabling value for control when using regmap set_bypass
+ * @active_discharge_off: Enabling value for control when using regmap
+ * set_active_discharge
+ * @active_discharge_on: Disabling value for control when using regmap
+ * set_active_discharge
+ * @active_discharge_mask: Mask for control when using regmap
+ * set_active_discharge
+ * @active_discharge_reg: Register for control when using regmap
+ * set_active_discharge
*
* @enable_time: Time taken for initial enable of regulator (in uS).
* @off_on_delay: guard time (in uS), before re-enabling a regulator
unsigned int bypass_mask;
unsigned int bypass_val_on;
unsigned int bypass_val_off;
+ unsigned int active_discharge_on;
+ unsigned int active_discharge_off;
+ unsigned int active_discharge_mask;
+ unsigned int active_discharge_reg;
unsigned int enable_time;
int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable);
int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable);
+int regulator_set_active_discharge_regmap(struct regulator_dev *rdev,
+ bool enable);
void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);
#endif
#define LP872X_MAX_REGULATORS 9
+#define LP8720_ENABLE_DELAY 200
+#define LP8725_ENABLE_DELAY 30000
+
enum lp872x_regulator_id {
LP8720_ID_BASE,
LP8720_ID_LDO1 = LP8720_ID_BASE,
* @update_config : if LP872X_GENERAL_CFG register is updated, set true
* @regulator_data : platform regulator id and init data
* @dvs : dvs data for buck voltage control
+ * @enable_gpio : gpio pin number for enable control
*/
struct lp872x_platform_data {
u8 general_config;
bool update_config;
struct lp872x_regulator_data regulator_data[LP872X_MAX_REGULATORS];
struct lp872x_dvs *dvs;
+ int enable_gpio;
};
#endif
#define REGULATOR_CHANGE_DRMS 0x10
#define REGULATOR_CHANGE_BYPASS 0x20
+/* Regulator active discharge flags */
+enum regulator_active_discharge {
+ REGULATOR_ACTIVE_DISCHARGE_DEFAULT,
+ REGULATOR_ACTIVE_DISCHARGE_DISABLE,
+ REGULATOR_ACTIVE_DISCHARGE_ENABLE,
+};
+
/**
* struct regulator_state - regulator state during low power system states
*
* @initial_state: Suspend state to set by default.
* @initial_mode: Mode to set at startup.
* @ramp_delay: Time to settle down after voltage change (unit: uV/us)
+ * @active_discharge: Enable/disable active discharge. The enum
+ * regulator_active_discharge values are used for
+ * initialisation.
* @enable_time: Turn-on time of the rails (unit: microseconds)
*/
struct regulation_constraints {
unsigned int ramp_delay;
unsigned int enable_time;
+ unsigned int active_discharge;
+
/* constraint flags */
unsigned always_on:1; /* regulator never off when system is on */
unsigned boot_on:1; /* bootloader/firmware enabled regulator */
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