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![Uwe Kleine-König](/assets/img/avatar_default.png)
The gpiod functions include variants for managed gpiod resources. Use it to simplify the remove function. As the driver handles a device node without a specification of dvs gpios just fine, additionally use the variant of gpiod_get exactly for this use case. This makes error checking more strict. As a third benefit this patch makes the driver use the flags parameter of gpiod_get* which will not be optional any more after 4.2 and so prevents a build failure when the respective gpiod commit is merged. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org>
627 lines
18 KiB
C
627 lines
18 KiB
C
/*
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* Regulator driver for Rockchip RK808
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*
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* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
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*
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* Author: Chris Zhong <zyw@rock-chips.com>
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* Author: Zhang Qing <zhangqing@rock-chips.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/mfd/rk808.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/gpio/consumer.h>
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/* Field Definitions */
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#define RK808_BUCK_VSEL_MASK 0x3f
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#define RK808_BUCK4_VSEL_MASK 0xf
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#define RK808_LDO_VSEL_MASK 0x1f
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/* Ramp rate definitions for buck1 / buck2 only */
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#define RK808_RAMP_RATE_OFFSET 3
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#define RK808_RAMP_RATE_MASK (3 << RK808_RAMP_RATE_OFFSET)
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#define RK808_RAMP_RATE_2MV_PER_US (0 << RK808_RAMP_RATE_OFFSET)
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#define RK808_RAMP_RATE_4MV_PER_US (1 << RK808_RAMP_RATE_OFFSET)
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#define RK808_RAMP_RATE_6MV_PER_US (2 << RK808_RAMP_RATE_OFFSET)
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#define RK808_RAMP_RATE_10MV_PER_US (3 << RK808_RAMP_RATE_OFFSET)
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#define RK808_DVS2_POL BIT(2)
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#define RK808_DVS1_POL BIT(1)
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/* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */
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#define RK808_SLP_REG_OFFSET 1
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/* Offset from XXX_ON_VSEL to XXX_DVS_VSEL */
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#define RK808_DVS_REG_OFFSET 2
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/* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */
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#define RK808_SLP_SET_OFF_REG_OFFSET 2
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/* max steps for increase voltage of Buck1/2, equal 100mv*/
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#define MAX_STEPS_ONE_TIME 8
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struct rk808_regulator_data {
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struct gpio_desc *dvs_gpio[2];
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};
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static const int rk808_buck_config_regs[] = {
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RK808_BUCK1_CONFIG_REG,
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RK808_BUCK2_CONFIG_REG,
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RK808_BUCK3_CONFIG_REG,
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RK808_BUCK4_CONFIG_REG,
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};
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static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500),
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};
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static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
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};
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static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
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};
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static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
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REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
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};
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static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
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};
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static int rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev *rdev)
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{
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struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
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int id = rdev->desc->id - RK808_ID_DCDC1;
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struct gpio_desc *gpio = pdata->dvs_gpio[id];
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unsigned int val;
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int ret;
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if (!gpio || gpiod_get_value(gpio) == 0)
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return regulator_get_voltage_sel_regmap(rdev);
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ret = regmap_read(rdev->regmap,
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rdev->desc->vsel_reg + RK808_DVS_REG_OFFSET,
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&val);
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if (ret != 0)
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return ret;
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val &= rdev->desc->vsel_mask;
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val >>= ffs(rdev->desc->vsel_mask) - 1;
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return val;
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}
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static int rk808_buck1_2_i2c_set_voltage_sel(struct regulator_dev *rdev,
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unsigned sel)
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{
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int ret, delta_sel;
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unsigned int old_sel, tmp, val, mask = rdev->desc->vsel_mask;
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ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
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if (ret != 0)
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return ret;
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tmp = val & ~mask;
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old_sel = val & mask;
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old_sel >>= ffs(mask) - 1;
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delta_sel = sel - old_sel;
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/*
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* If directly modify the register to change the voltage, we will face
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* the risk of overshoot. Put it into a multi-step, can effectively
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* avoid this problem, a step is 100mv here.
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*/
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while (delta_sel > MAX_STEPS_ONE_TIME) {
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old_sel += MAX_STEPS_ONE_TIME;
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val = old_sel << (ffs(mask) - 1);
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val |= tmp;
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/*
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* i2c is 400kHz (2.5us per bit) and we must transmit _at least_
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* 3 bytes (24 bits) plus start and stop so 26 bits. So we've
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* got more than 65 us between each voltage change and thus
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* won't ramp faster than ~1500 uV / us.
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*/
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ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
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delta_sel = sel - old_sel;
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}
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sel <<= ffs(mask) - 1;
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val = tmp | sel;
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ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
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/*
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* When we change the voltage register directly, the ramp rate is about
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* 100000uv/us, wait 1us to make sure the target voltage to be stable,
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* so we needn't wait extra time after that.
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*/
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udelay(1);
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return ret;
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}
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static int rk808_buck1_2_set_voltage_sel(struct regulator_dev *rdev,
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unsigned sel)
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{
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struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
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int id = rdev->desc->id - RK808_ID_DCDC1;
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struct gpio_desc *gpio = pdata->dvs_gpio[id];
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unsigned int reg = rdev->desc->vsel_reg;
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unsigned old_sel;
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int ret, gpio_level;
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if (!gpio)
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return rk808_buck1_2_i2c_set_voltage_sel(rdev, sel);
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gpio_level = gpiod_get_value(gpio);
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if (gpio_level == 0) {
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reg += RK808_DVS_REG_OFFSET;
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ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &old_sel);
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} else {
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ret = regmap_read(rdev->regmap,
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reg + RK808_DVS_REG_OFFSET,
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&old_sel);
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}
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if (ret != 0)
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return ret;
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sel <<= ffs(rdev->desc->vsel_mask) - 1;
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sel |= old_sel & ~rdev->desc->vsel_mask;
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ret = regmap_write(rdev->regmap, reg, sel);
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if (ret)
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return ret;
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gpiod_set_value(gpio, !gpio_level);
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return ret;
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}
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static int rk808_buck1_2_set_voltage_time_sel(struct regulator_dev *rdev,
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unsigned int old_selector,
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unsigned int new_selector)
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{
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struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
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int id = rdev->desc->id - RK808_ID_DCDC1;
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struct gpio_desc *gpio = pdata->dvs_gpio[id];
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/* if there is no dvs1/2 pin, we don't need wait extra time here. */
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if (!gpio)
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return 0;
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return regulator_set_voltage_time_sel(rdev, old_selector, new_selector);
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}
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static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
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{
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unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
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unsigned int reg = rk808_buck_config_regs[rdev->desc->id -
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RK808_ID_DCDC1];
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switch (ramp_delay) {
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case 1 ... 2000:
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ramp_value = RK808_RAMP_RATE_2MV_PER_US;
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break;
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case 2001 ... 4000:
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ramp_value = RK808_RAMP_RATE_4MV_PER_US;
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break;
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case 4001 ... 6000:
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ramp_value = RK808_RAMP_RATE_6MV_PER_US;
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break;
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case 6001 ... 10000:
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break;
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default:
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pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
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rdev->desc->name, ramp_delay);
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}
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return regmap_update_bits(rdev->regmap, reg,
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RK808_RAMP_RATE_MASK, ramp_value);
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}
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static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
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{
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unsigned int reg;
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int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
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if (sel < 0)
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return -EINVAL;
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reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
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return regmap_update_bits(rdev->regmap, reg,
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rdev->desc->vsel_mask,
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sel);
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}
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static int rk808_set_suspend_enable(struct regulator_dev *rdev)
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{
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unsigned int reg;
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reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
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return regmap_update_bits(rdev->regmap, reg,
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rdev->desc->enable_mask,
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0);
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}
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static int rk808_set_suspend_disable(struct regulator_dev *rdev)
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{
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unsigned int reg;
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reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
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return regmap_update_bits(rdev->regmap, reg,
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rdev->desc->enable_mask,
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rdev->desc->enable_mask);
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}
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static struct regulator_ops rk808_buck1_2_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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.get_voltage_sel = rk808_buck1_2_get_voltage_sel_regmap,
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.set_voltage_sel = rk808_buck1_2_set_voltage_sel,
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.set_voltage_time_sel = rk808_buck1_2_set_voltage_time_sel,
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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_ramp_delay = rk808_set_ramp_delay,
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.set_suspend_voltage = rk808_set_suspend_voltage,
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.set_suspend_enable = rk808_set_suspend_enable,
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.set_suspend_disable = rk808_set_suspend_disable,
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};
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static struct regulator_ops rk808_reg_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_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_suspend_voltage = rk808_set_suspend_voltage,
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.set_suspend_enable = rk808_set_suspend_enable,
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.set_suspend_disable = rk808_set_suspend_disable,
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};
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static struct regulator_ops rk808_switch_ops = {
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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_suspend_enable = rk808_set_suspend_enable,
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.set_suspend_disable = rk808_set_suspend_disable,
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};
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static const struct regulator_desc rk808_reg[] = {
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{
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.name = "DCDC_REG1",
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.supply_name = "vcc1",
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.id = RK808_ID_DCDC1,
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.ops = &rk808_buck1_2_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 64,
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.linear_ranges = rk808_buck_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
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.vsel_reg = RK808_BUCK1_ON_VSEL_REG,
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.vsel_mask = RK808_BUCK_VSEL_MASK,
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.enable_reg = RK808_DCDC_EN_REG,
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.enable_mask = BIT(0),
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.owner = THIS_MODULE,
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}, {
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.name = "DCDC_REG2",
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.supply_name = "vcc2",
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.id = RK808_ID_DCDC2,
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.ops = &rk808_buck1_2_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 64,
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.linear_ranges = rk808_buck_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
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.vsel_reg = RK808_BUCK2_ON_VSEL_REG,
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.vsel_mask = RK808_BUCK_VSEL_MASK,
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.enable_reg = RK808_DCDC_EN_REG,
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.enable_mask = BIT(1),
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.owner = THIS_MODULE,
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}, {
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.name = "DCDC_REG3",
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.supply_name = "vcc3",
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.id = RK808_ID_DCDC3,
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.ops = &rk808_switch_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 1,
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.enable_reg = RK808_DCDC_EN_REG,
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.enable_mask = BIT(2),
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.owner = THIS_MODULE,
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}, {
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.name = "DCDC_REG4",
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.supply_name = "vcc4",
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.id = RK808_ID_DCDC4,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 16,
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.linear_ranges = rk808_buck4_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
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.vsel_reg = RK808_BUCK4_ON_VSEL_REG,
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.vsel_mask = RK808_BUCK4_VSEL_MASK,
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.enable_reg = RK808_DCDC_EN_REG,
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.enable_mask = BIT(3),
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG1",
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.supply_name = "vcc6",
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.id = RK808_ID_LDO1,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 17,
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.linear_ranges = rk808_ldo_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
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.vsel_reg = RK808_LDO1_ON_VSEL_REG,
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.vsel_mask = RK808_LDO_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(0),
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.enable_time = 400,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG2",
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.supply_name = "vcc6",
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.id = RK808_ID_LDO2,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 17,
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.linear_ranges = rk808_ldo_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
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.vsel_reg = RK808_LDO2_ON_VSEL_REG,
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.vsel_mask = RK808_LDO_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(1),
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.enable_time = 400,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG3",
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.supply_name = "vcc7",
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.id = RK808_ID_LDO3,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 16,
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.linear_ranges = rk808_ldo3_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
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.vsel_reg = RK808_LDO3_ON_VSEL_REG,
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.vsel_mask = RK808_BUCK4_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(2),
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.enable_time = 400,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG4",
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.supply_name = "vcc9",
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.id = RK808_ID_LDO4,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 17,
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.linear_ranges = rk808_ldo_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
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.vsel_reg = RK808_LDO4_ON_VSEL_REG,
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.vsel_mask = RK808_LDO_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(3),
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.enable_time = 400,
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG5",
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.supply_name = "vcc9",
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.id = RK808_ID_LDO5,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 17,
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.linear_ranges = rk808_ldo_voltage_ranges,
|
|
.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
|
|
.vsel_reg = RK808_LDO5_ON_VSEL_REG,
|
|
.vsel_mask = RK808_LDO_VSEL_MASK,
|
|
.enable_reg = RK808_LDO_EN_REG,
|
|
.enable_mask = BIT(4),
|
|
.enable_time = 400,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO_REG6",
|
|
.supply_name = "vcc10",
|
|
.id = RK808_ID_LDO6,
|
|
.ops = &rk808_reg_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.n_voltages = 18,
|
|
.linear_ranges = rk808_ldo6_voltage_ranges,
|
|
.n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
|
|
.vsel_reg = RK808_LDO6_ON_VSEL_REG,
|
|
.vsel_mask = RK808_LDO_VSEL_MASK,
|
|
.enable_reg = RK808_LDO_EN_REG,
|
|
.enable_mask = BIT(5),
|
|
.enable_time = 400,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO_REG7",
|
|
.supply_name = "vcc7",
|
|
.id = RK808_ID_LDO7,
|
|
.ops = &rk808_reg_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.n_voltages = 18,
|
|
.linear_ranges = rk808_ldo6_voltage_ranges,
|
|
.n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
|
|
.vsel_reg = RK808_LDO7_ON_VSEL_REG,
|
|
.vsel_mask = RK808_LDO_VSEL_MASK,
|
|
.enable_reg = RK808_LDO_EN_REG,
|
|
.enable_mask = BIT(6),
|
|
.enable_time = 400,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "LDO_REG8",
|
|
.supply_name = "vcc11",
|
|
.id = RK808_ID_LDO8,
|
|
.ops = &rk808_reg_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.n_voltages = 17,
|
|
.linear_ranges = rk808_ldo_voltage_ranges,
|
|
.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
|
|
.vsel_reg = RK808_LDO8_ON_VSEL_REG,
|
|
.vsel_mask = RK808_LDO_VSEL_MASK,
|
|
.enable_reg = RK808_LDO_EN_REG,
|
|
.enable_mask = BIT(7),
|
|
.enable_time = 400,
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "SWITCH_REG1",
|
|
.supply_name = "vcc8",
|
|
.id = RK808_ID_SWITCH1,
|
|
.ops = &rk808_switch_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.enable_reg = RK808_DCDC_EN_REG,
|
|
.enable_mask = BIT(5),
|
|
.owner = THIS_MODULE,
|
|
}, {
|
|
.name = "SWITCH_REG2",
|
|
.supply_name = "vcc12",
|
|
.id = RK808_ID_SWITCH2,
|
|
.ops = &rk808_switch_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.enable_reg = RK808_DCDC_EN_REG,
|
|
.enable_mask = BIT(6),
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static struct of_regulator_match rk808_reg_matches[] = {
|
|
[RK808_ID_DCDC1] = { .name = "DCDC_REG1" },
|
|
[RK808_ID_DCDC2] = { .name = "DCDC_REG2" },
|
|
[RK808_ID_DCDC3] = { .name = "DCDC_REG3" },
|
|
[RK808_ID_DCDC4] = { .name = "DCDC_REG4" },
|
|
[RK808_ID_LDO1] = { .name = "LDO_REG1" },
|
|
[RK808_ID_LDO2] = { .name = "LDO_REG2" },
|
|
[RK808_ID_LDO3] = { .name = "LDO_REG3" },
|
|
[RK808_ID_LDO4] = { .name = "LDO_REG4" },
|
|
[RK808_ID_LDO5] = { .name = "LDO_REG5" },
|
|
[RK808_ID_LDO6] = { .name = "LDO_REG6" },
|
|
[RK808_ID_LDO7] = { .name = "LDO_REG7" },
|
|
[RK808_ID_LDO8] = { .name = "LDO_REG8" },
|
|
[RK808_ID_SWITCH1] = { .name = "SWITCH_REG1" },
|
|
[RK808_ID_SWITCH2] = { .name = "SWITCH_REG2" },
|
|
};
|
|
|
|
static int rk808_regulator_dt_parse_pdata(struct device *dev,
|
|
struct device *client_dev,
|
|
struct regmap *map,
|
|
struct rk808_regulator_data *pdata)
|
|
{
|
|
struct device_node *np;
|
|
int tmp, ret, i;
|
|
|
|
np = of_get_child_by_name(client_dev->of_node, "regulators");
|
|
if (!np)
|
|
return -ENXIO;
|
|
|
|
ret = of_regulator_match(dev, np, rk808_reg_matches,
|
|
RK808_NUM_REGULATORS);
|
|
if (ret < 0)
|
|
goto dt_parse_end;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) {
|
|
pdata->dvs_gpio[i] =
|
|
devm_gpiod_get_index_optional(client_dev, "dvs", i,
|
|
GPIOD_OUT_LOW);
|
|
if (IS_ERR(pdata->dvs_gpio[i])) {
|
|
ret = PTR_ERR(pdata->dvs_gpio[i]);
|
|
dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret);
|
|
goto dt_parse_end;
|
|
}
|
|
|
|
if (!pdata->dvs_gpio[i]) {
|
|
dev_warn(dev, "there is no dvs%d gpio\n", i);
|
|
continue;
|
|
}
|
|
|
|
tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL;
|
|
ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp,
|
|
gpiod_is_active_low(pdata->dvs_gpio[i]) ?
|
|
0 : tmp);
|
|
}
|
|
|
|
dt_parse_end:
|
|
of_node_put(np);
|
|
return ret;
|
|
}
|
|
|
|
static int rk808_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
|
|
struct i2c_client *client = rk808->i2c;
|
|
struct regulator_config config = {};
|
|
struct regulator_dev *rk808_rdev;
|
|
struct rk808_regulator_data *pdata;
|
|
int ret, i;
|
|
|
|
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata)
|
|
return -ENOMEM;
|
|
|
|
ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev,
|
|
rk808->regmap, pdata);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
platform_set_drvdata(pdev, pdata);
|
|
|
|
/* Instantiate the regulators */
|
|
for (i = 0; i < RK808_NUM_REGULATORS; i++) {
|
|
if (!rk808_reg_matches[i].init_data ||
|
|
!rk808_reg_matches[i].of_node)
|
|
continue;
|
|
|
|
config.dev = &client->dev;
|
|
config.driver_data = pdata;
|
|
config.regmap = rk808->regmap;
|
|
config.of_node = rk808_reg_matches[i].of_node;
|
|
config.init_data = rk808_reg_matches[i].init_data;
|
|
|
|
rk808_rdev = devm_regulator_register(&pdev->dev,
|
|
&rk808_reg[i], &config);
|
|
if (IS_ERR(rk808_rdev)) {
|
|
dev_err(&client->dev,
|
|
"failed to register %d regulator\n", i);
|
|
return PTR_ERR(rk808_rdev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver rk808_regulator_driver = {
|
|
.probe = rk808_regulator_probe,
|
|
.driver = {
|
|
.name = "rk808-regulator",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(rk808_regulator_driver);
|
|
|
|
MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
|
|
MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
|
|
MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:rk808-regulator");
|