mirror of
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Merge remote-tracking branch 'regulator/topic/pwm' into regulator-drivers
Conflicts: drivers/regulator/Kconfig
This commit is contained in:
Mark Brown
commit
d1c3f7ca15
@ -0,0 +1,27 @@
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pwm regulator bindings
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Required properties:
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- compatible: Should be "pwm-regulator"
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- pwms: OF device-tree PWM specification (see PWM binding pwm.txt)
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- voltage-table: voltage and duty table, include 2 members in each set of
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brackets, first one is voltage(unit: uv), the next is duty(unit: percent)
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Any property defined as part of the core regulator binding defined in
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regulator.txt can also be used.
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Example:
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pwm_regulator {
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compatible = "pwm-regulator;
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pwms = <&pwm1 0 8448 0>;
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voltage-table = <1114000 0>,
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<1095000 10>,
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<1076000 20>,
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<1056000 30>,
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<1036000 40>,
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<1016000 50>;
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regulator-min-microvolt = <1016000>;
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regulator-max-microvolt = <1114000>;
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regulator-name = "vdd_logic";
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};
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@ -449,6 +449,13 @@ config REGULATOR_PFUZE100
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Say y here to support the regulators found on the Freescale
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PFUZE100/PFUZE200 PMIC.
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config REGULATOR_PWM
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tristate "PWM voltage regulator"
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depends on PWM
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help
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This driver supports PWM controlled voltage regulators. PWM
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duty cycle can increase or decrease the voltage.
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config REGULATOR_QCOM_RPM
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tristate "Qualcomm RPM regulator driver"
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depends on MFD_QCOM_RPM
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@ -495,12 +502,6 @@ config REGULATOR_S5M8767
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via I2C bus. S5M8767A have 9 Bucks and 28 LDOs output and
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supports DVS mode with 8bits of output voltage control.
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config REGULATOR_ST_PWM
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tristate "STMicroelectronics PWM voltage regulator"
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depends on ARCH_STI
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help
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This driver supports ST's PWM controlled voltage regulators.
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config REGULATOR_TI_ABB
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tristate "TI Adaptive Body Bias on-chip LDO"
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depends on ARCH_OMAP
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@ -58,6 +58,7 @@ obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o
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obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o
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obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o
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obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o
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obj-$(CONFIG_REGULATOR_PWM) += pwm-regulator.o
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obj-$(CONFIG_REGULATOR_TPS51632) += tps51632-regulator.o
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obj-$(CONFIG_REGULATOR_PBIAS) += pbias-regulator.o
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obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
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@ -66,7 +67,6 @@ obj-$(CONFIG_REGULATOR_RC5T583) += rc5t583-regulator.o
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obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
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obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
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obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
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obj-$(CONFIG_REGULATOR_ST_PWM) += st-pwm.o
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obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o
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obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o
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obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
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197
drivers/regulator/pwm-regulator.c
Normal file
197
drivers/regulator/pwm-regulator.c
Normal file
@ -0,0 +1,197 @@
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/*
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* Regulator driver for PWM Regulators
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*
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* Copyright (C) 2014 - STMicroelectronics Inc.
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*
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* Author: Lee Jones <lee.jones@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/pwm.h>
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struct pwm_regulator_data {
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struct regulator_desc desc;
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struct pwm_voltages *duty_cycle_table;
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struct pwm_device *pwm;
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bool enabled;
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int state;
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};
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struct pwm_voltages {
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unsigned int uV;
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unsigned int dutycycle;
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};
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static int pwm_regulator_get_voltage_sel(struct regulator_dev *dev)
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{
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struct pwm_regulator_data *drvdata = rdev_get_drvdata(dev);
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return drvdata->state;
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}
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static int pwm_regulator_set_voltage_sel(struct regulator_dev *dev,
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unsigned selector)
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{
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struct pwm_regulator_data *drvdata = rdev_get_drvdata(dev);
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unsigned int pwm_reg_period;
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int dutycycle;
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int ret;
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pwm_reg_period = pwm_get_period(drvdata->pwm);
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dutycycle = (pwm_reg_period *
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drvdata->duty_cycle_table[selector].dutycycle) / 100;
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ret = pwm_config(drvdata->pwm, dutycycle, pwm_reg_period);
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if (ret) {
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dev_err(&dev->dev, "Failed to configure PWM\n");
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return ret;
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}
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drvdata->state = selector;
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if (!drvdata->enabled) {
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ret = pwm_enable(drvdata->pwm);
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if (ret) {
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dev_err(&dev->dev, "Failed to enable PWM\n");
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return ret;
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}
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drvdata->enabled = true;
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}
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return 0;
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}
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static int pwm_regulator_list_voltage(struct regulator_dev *dev,
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unsigned selector)
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{
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struct pwm_regulator_data *drvdata = rdev_get_drvdata(dev);
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if (selector >= drvdata->desc.n_voltages)
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return -EINVAL;
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return drvdata->duty_cycle_table[selector].uV;
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}
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static struct regulator_ops pwm_regulator_voltage_ops = {
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.set_voltage_sel = pwm_regulator_set_voltage_sel,
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.get_voltage_sel = pwm_regulator_get_voltage_sel,
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.list_voltage = pwm_regulator_list_voltage,
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.map_voltage = regulator_map_voltage_iterate,
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};
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static const struct regulator_desc pwm_regulator_desc = {
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.name = "pwm-regulator",
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.ops = &pwm_regulator_voltage_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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.supply_name = "pwm",
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};
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static int pwm_regulator_probe(struct platform_device *pdev)
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{
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struct pwm_regulator_data *drvdata;
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struct property *prop;
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struct regulator_dev *regulator;
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struct regulator_config config = { };
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struct device_node *np = pdev->dev.of_node;
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int length, ret;
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if (!np) {
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dev_err(&pdev->dev, "Device Tree node missing\n");
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return -EINVAL;
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}
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drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
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if (!drvdata)
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return -ENOMEM;
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memcpy(&drvdata->desc, &pwm_regulator_desc, sizeof(pwm_regulator_desc));
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/* determine the number of voltage-table */
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prop = of_find_property(np, "voltage-table", &length);
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if (!prop) {
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dev_err(&pdev->dev, "No voltage-table\n");
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return -EINVAL;
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}
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if ((length < sizeof(*drvdata->duty_cycle_table)) ||
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(length % sizeof(*drvdata->duty_cycle_table))) {
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dev_err(&pdev->dev, "voltage-table length(%d) is invalid\n",
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length);
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return -EINVAL;
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}
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drvdata->desc.n_voltages = length / sizeof(*drvdata->duty_cycle_table);
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drvdata->duty_cycle_table = devm_kzalloc(&pdev->dev,
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length, GFP_KERNEL);
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if (!drvdata->duty_cycle_table)
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return -ENOMEM;
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/* read voltage table from DT property */
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ret = of_property_read_u32_array(np, "voltage-table",
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(u32 *)drvdata->duty_cycle_table,
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length / sizeof(u32));
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if (ret < 0) {
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dev_err(&pdev->dev, "read voltage-table failed\n");
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return ret;
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}
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config.init_data = of_get_regulator_init_data(&pdev->dev, np);
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if (!config.init_data)
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return -ENOMEM;
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config.of_node = np;
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config.dev = &pdev->dev;
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config.driver_data = drvdata;
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drvdata->pwm = devm_pwm_get(&pdev->dev, NULL);
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if (IS_ERR(drvdata->pwm)) {
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dev_err(&pdev->dev, "Failed to get PWM\n");
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return PTR_ERR(drvdata->pwm);
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}
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regulator = devm_regulator_register(&pdev->dev,
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&drvdata->desc, &config);
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if (IS_ERR(regulator)) {
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dev_err(&pdev->dev, "Failed to register regulator %s\n",
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drvdata->desc.name);
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return PTR_ERR(regulator);
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}
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return 0;
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}
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static const struct of_device_id pwm_of_match[] = {
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{ .compatible = "pwm-regulator" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, pwm_of_match);
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static struct platform_driver pwm_regulator_driver = {
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.driver = {
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.name = "pwm-regulator",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(pwm_of_match),
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},
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.probe = pwm_regulator_probe,
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};
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module_platform_driver(pwm_regulator_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Lee Jones <lee.jones@linaro.org>");
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MODULE_DESCRIPTION("PWM Regulator Driver");
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MODULE_ALIAS("platform:pwm-regulator");
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@ -1,190 +0,0 @@
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/*
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* Regulator driver for ST's PWM Regulators
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*
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* Copyright (C) 2014 - STMicroelectronics Inc.
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*
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* Author: Lee Jones <lee.jones@linaro.org>
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*
|
||||
* 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.
|
||||
*/
|
||||
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#include <linux/module.h>
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#include <linux/init.h>
|
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#include <linux/err.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/pwm.h>
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#define ST_PWM_REG_PERIOD 8448
|
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struct st_pwm_regulator_pdata {
|
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const struct regulator_desc *desc;
|
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struct st_pwm_voltages *duty_cycle_table;
|
||||
};
|
||||
|
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struct st_pwm_regulator_data {
|
||||
const struct st_pwm_regulator_pdata *pdata;
|
||||
struct pwm_device *pwm;
|
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bool enabled;
|
||||
int state;
|
||||
};
|
||||
|
||||
struct st_pwm_voltages {
|
||||
unsigned int uV;
|
||||
unsigned int dutycycle;
|
||||
};
|
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|
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static int st_pwm_regulator_get_voltage_sel(struct regulator_dev *dev)
|
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{
|
||||
struct st_pwm_regulator_data *drvdata = rdev_get_drvdata(dev);
|
||||
|
||||
return drvdata->state;
|
||||
}
|
||||
|
||||
static int st_pwm_regulator_set_voltage_sel(struct regulator_dev *dev,
|
||||
unsigned selector)
|
||||
{
|
||||
struct st_pwm_regulator_data *drvdata = rdev_get_drvdata(dev);
|
||||
int dutycycle;
|
||||
int ret;
|
||||
|
||||
dutycycle = (ST_PWM_REG_PERIOD / 100) *
|
||||
drvdata->pdata->duty_cycle_table[selector].dutycycle;
|
||||
|
||||
ret = pwm_config(drvdata->pwm, dutycycle, ST_PWM_REG_PERIOD);
|
||||
if (ret) {
|
||||
dev_err(&dev->dev, "Failed to configure PWM\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
drvdata->state = selector;
|
||||
|
||||
if (!drvdata->enabled) {
|
||||
ret = pwm_enable(drvdata->pwm);
|
||||
if (ret) {
|
||||
dev_err(&dev->dev, "Failed to enable PWM\n");
|
||||
return ret;
|
||||
}
|
||||
drvdata->enabled = true;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int st_pwm_regulator_list_voltage(struct regulator_dev *dev,
|
||||
unsigned selector)
|
||||
{
|
||||
struct st_pwm_regulator_data *drvdata = rdev_get_drvdata(dev);
|
||||
|
||||
if (selector >= dev->desc->n_voltages)
|
||||
return -EINVAL;
|
||||
|
||||
return drvdata->pdata->duty_cycle_table[selector].uV;
|
||||
}
|
||||
|
||||
static struct regulator_ops st_pwm_regulator_voltage_ops = {
|
||||
.set_voltage_sel = st_pwm_regulator_set_voltage_sel,
|
||||
.get_voltage_sel = st_pwm_regulator_get_voltage_sel,
|
||||
.list_voltage = st_pwm_regulator_list_voltage,
|
||||
.map_voltage = regulator_map_voltage_iterate,
|
||||
};
|
||||
|
||||
static struct st_pwm_voltages b2105_duty_cycle_table[] = {
|
||||
{ .uV = 1114000, .dutycycle = 0, },
|
||||
{ .uV = 1095000, .dutycycle = 10, },
|
||||
{ .uV = 1076000, .dutycycle = 20, },
|
||||
{ .uV = 1056000, .dutycycle = 30, },
|
||||
{ .uV = 1036000, .dutycycle = 40, },
|
||||
{ .uV = 1016000, .dutycycle = 50, },
|
||||
/* WARNING: Values above 50% duty-cycle cause boot failures. */
|
||||
};
|
||||
|
||||
static const struct regulator_desc b2105_desc = {
|
||||
.name = "b2105-pwm-regulator",
|
||||
.ops = &st_pwm_regulator_voltage_ops,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
.n_voltages = ARRAY_SIZE(b2105_duty_cycle_table),
|
||||
.supply_name = "pwm",
|
||||
};
|
||||
|
||||
static const struct st_pwm_regulator_pdata b2105_info = {
|
||||
.desc = &b2105_desc,
|
||||
.duty_cycle_table = b2105_duty_cycle_table,
|
||||
};
|
||||
|
||||
static const struct of_device_id st_pwm_of_match[] = {
|
||||
{ .compatible = "st,b2105-pwm-regulator", .data = &b2105_info, },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, st_pwm_of_match);
|
||||
|
||||
static int st_pwm_regulator_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct st_pwm_regulator_data *drvdata;
|
||||
struct regulator_dev *regulator;
|
||||
struct regulator_config config = { };
|
||||
struct device_node *np = pdev->dev.of_node;
|
||||
const struct of_device_id *of_match;
|
||||
|
||||
if (!np) {
|
||||
dev_err(&pdev->dev, "Device Tree node missing\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
|
||||
if (!drvdata)
|
||||
return -ENOMEM;
|
||||
|
||||
of_match = of_match_device(st_pwm_of_match, &pdev->dev);
|
||||
if (!of_match) {
|
||||
dev_err(&pdev->dev, "failed to match of device\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
drvdata->pdata = of_match->data;
|
||||
|
||||
config.init_data = of_get_regulator_init_data(&pdev->dev, np);
|
||||
if (!config.init_data)
|
||||
return -ENOMEM;
|
||||
|
||||
config.of_node = np;
|
||||
config.dev = &pdev->dev;
|
||||
config.driver_data = drvdata;
|
||||
|
||||
drvdata->pwm = devm_pwm_get(&pdev->dev, NULL);
|
||||
if (IS_ERR(drvdata->pwm)) {
|
||||
dev_err(&pdev->dev, "Failed to get PWM\n");
|
||||
return PTR_ERR(drvdata->pwm);
|
||||
}
|
||||
|
||||
regulator = devm_regulator_register(&pdev->dev,
|
||||
drvdata->pdata->desc, &config);
|
||||
if (IS_ERR(regulator)) {
|
||||
dev_err(&pdev->dev, "Failed to register regulator %s\n",
|
||||
drvdata->pdata->desc->name);
|
||||
return PTR_ERR(regulator);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver st_pwm_regulator_driver = {
|
||||
.driver = {
|
||||
.name = "st-pwm-regulator",
|
||||
.owner = THIS_MODULE,
|
||||
.of_match_table = of_match_ptr(st_pwm_of_match),
|
||||
},
|
||||
.probe = st_pwm_regulator_probe,
|
||||
};
|
||||
|
||||
module_platform_driver(st_pwm_regulator_driver);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Lee Jones <lee.jones@linaro.org>");
|
||||
MODULE_DESCRIPTION("ST PWM Regulator Driver");
|
||||
MODULE_ALIAS("platform:st_pwm-regulator");
|
||||
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