Merge remote-tracking branch 'regulator/topic/max8997' into regulator-next
This commit is contained in:
Mark Brown
commit
9e21867073
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@ -0,0 +1,146 @@
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* Maxim MAX8997 Voltage and Current Regulator
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The Maxim MAX8997 is a multi-function device which includes volatage and
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current regulators, rtc, charger controller and other sub-blocks. It is
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interfaced to the host controller using a i2c interface. Each sub-block is
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addressed by the host system using different i2c slave address. This document
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describes the bindings for 'pmic' sub-block of max8997.
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Required properties:
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- compatible: Should be "maxim,max8997-pmic".
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- reg: Specifies the i2c slave address of the pmic block. It should be 0x66.
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- max8997,pmic-buck1-dvs-voltage: A set of 8 voltage values in micro-volt (uV)
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units for buck1 when changing voltage using gpio dvs. Refer to [1] below
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for additional information.
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- max8997,pmic-buck2-dvs-voltage: A set of 8 voltage values in micro-volt (uV)
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units for buck2 when changing voltage using gpio dvs. Refer to [1] below
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for additional information.
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- max8997,pmic-buck5-dvs-voltage: A set of 8 voltage values in micro-volt (uV)
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units for buck5 when changing voltage using gpio dvs. Refer to [1] below
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for additional information.
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[1] If none of the 'max8997,pmic-buck[1/2/5]-uses-gpio-dvs' optional
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property is specified, the 'max8997,pmic-buck[1/2/5]-dvs-voltage'
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property should specify atleast one voltage level (which would be a
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safe operating voltage).
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If either of the 'max8997,pmic-buck[1/2/5]-uses-gpio-dvs' optional
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property is specified, then all the eigth voltage values for the
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'max8997,pmic-buck[1/2/5]-dvs-voltage' should be specified.
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Optional properties:
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- interrupt-parent: Specifies the phandle of the interrupt controller to which
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the interrupts from max8997 are delivered to.
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- interrupts: Interrupt specifiers for two interrupt sources.
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- First interrupt specifier is for 'irq1' interrupt.
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- Second interrupt specifier is for 'alert' interrupt.
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- max8997,pmic-buck1-uses-gpio-dvs: 'buck1' can be controlled by gpio dvs.
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- max8997,pmic-buck2-uses-gpio-dvs: 'buck2' can be controlled by gpio dvs.
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- max8997,pmic-buck5-uses-gpio-dvs: 'buck5' can be controlled by gpio dvs.
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Additional properties required if either of the optional properties are used:
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- max8997,pmic-ignore-gpiodvs-side-effect: When GPIO-DVS mode is used for
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multiple bucks, changing the voltage value of one of the bucks may affect
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that of another buck, which is the side effect of the change (set_voltage).
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Use this property to ignore such side effects and change the voltage.
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- max8997,pmic-buck125-default-dvs-idx: Default voltage setting selected from
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the possible 8 options selectable by the dvs gpios. The value of this
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property should be between 0 and 7. If not specified or if out of range, the
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default value of this property is set to 0.
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- max8997,pmic-buck125-dvs-gpios: GPIO specifiers for three host gpio's used
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for dvs. The format of the gpio specifier depends in the gpio controller.
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Regulators: The regulators of max8997 that have to be instantiated should be
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included in a sub-node named 'regulators'. Regulator nodes included in this
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sub-node should be of the format as listed below.
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regulator_name {
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standard regulator bindings here
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};
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The following are the names of the regulators that the max8997 pmic block
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supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
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as per the datasheet of max8997.
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- LDOn
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- valid values for n are 1 to 18 and 21
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- Example: LDO0, LD01, LDO2, LDO21
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- BUCKn
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- valid values for n are 1 to 7.
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- Example: BUCK1, BUCK2, BUCK3, BUCK7
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- ENVICHG: Battery Charging Current Monitor Output. This is a fixed
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voltage type regulator
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- ESAFEOUT1: (ldo19)
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- ESAFEOUT2: (ld020)
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- CHARGER_CV: main battery charger voltage control
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- CHARGER: main battery charger current control
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- CHARGER_TOPOFF: end of charge current threshold level
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The bindings inside the regulator nodes use the standard regulator bindings
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which are documented elsewhere.
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Example:
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max8997_pmic@66 {
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compatible = "maxim,max8997-pmic";
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interrupt-parent = <&wakeup_eint>;
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reg = <0x66>;
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interrupts = <4 0>, <3 0>;
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max8997,pmic-buck1-uses-gpio-dvs;
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max8997,pmic-buck2-uses-gpio-dvs;
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max8997,pmic-buck5-uses-gpio-dvs;
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max8997,pmic-ignore-gpiodvs-side-effect;
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max8997,pmic-buck125-default-dvs-idx = <0>;
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max8997,pmic-buck125-dvs-gpios = <&gpx0 0 1 0 0>, /* SET1 */
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<&gpx0 1 1 0 0>, /* SET2 */
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<&gpx0 2 1 0 0>; /* SET3 */
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max8997,pmic-buck1-dvs-voltage = <1350000>, <1300000>,
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<1250000>, <1200000>,
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<1150000>, <1100000>,
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<1000000>, <950000>;
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max8997,pmic-buck2-dvs-voltage = <1100000>, <1100000>,
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<1100000>, <1100000>,
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<1000000>, <1000000>,
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<1000000>, <1000000>;
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max8997,pmic-buck5-dvs-voltage = <1200000>, <1200000>,
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<1200000>, <1200000>,
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<1200000>, <1200000>,
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<1200000>, <1200000>;
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regulators {
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ldo1_reg: LDO1 {
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regulator-name = "VDD_ABB_3.3V";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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};
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ldo2_reg: LDO2 {
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regulator-name = "VDD_ALIVE_1.1V";
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regulator-min-microvolt = <1100000>;
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regulator-max-microvolt = <1100000>;
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regulator-always-on;
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};
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buck1_reg: BUCK1 {
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regulator-name = "VDD_ARM_1.2V";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1350000>;
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regulator-always-on;
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regulator-boot-on;
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};
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};
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};
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@ -21,8 +21,10 @@
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* This driver is based on max8998.c
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*/
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/of_irq.h>
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#include <linux/interrupt.h>
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#include <linux/pm_runtime.h>
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#include <linux/module.h>
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@ -47,6 +49,13 @@ static struct mfd_cell max8997_devs[] = {
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{ .name = "max8997-led", .id = 2 },
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};
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#ifdef CONFIG_OF
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static struct of_device_id __devinitdata max8997_pmic_dt_match[] = {
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{ .compatible = "maxim,max8997-pmic", .data = TYPE_MAX8997 },
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{},
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};
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#endif
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int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
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{
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struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
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@ -123,6 +132,58 @@ int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
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}
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EXPORT_SYMBOL_GPL(max8997_update_reg);
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#ifdef CONFIG_OF
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/*
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* Only the common platform data elements for max8997 are parsed here from the
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* device tree. Other sub-modules of max8997 such as pmic, rtc and others have
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* to parse their own platform data elements from device tree.
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*
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* The max8997 platform data structure is instantiated here and the drivers for
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* the sub-modules need not instantiate another instance while parsing their
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* platform data.
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*/
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static struct max8997_platform_data *max8997_i2c_parse_dt_pdata(
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struct device *dev)
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{
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struct max8997_platform_data *pd;
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pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
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if (!pd) {
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dev_err(dev, "could not allocate memory for pdata\n");
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return ERR_PTR(-ENOMEM);
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}
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pd->ono = irq_of_parse_and_map(dev->of_node, 1);
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/*
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* ToDo: the 'wakeup' member in the platform data is more of a linux
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* specfic information. Hence, there is no binding for that yet and
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* not parsed here.
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*/
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return pd;
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}
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#else
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static struct max8997_platform_data *max8997_i2c_parse_dt_pdata(
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struct device *dev)
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{
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return 0;
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}
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#endif
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static inline int max8997_i2c_get_driver_data(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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#ifdef CONFIG_OF
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if (i2c->dev.of_node) {
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const struct of_device_id *match;
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match = of_match_node(max8997_pmic_dt_match, i2c->dev.of_node);
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return (int)match->data;
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}
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#endif
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return (int)id->driver_data;
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}
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static int max8997_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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@ -137,12 +198,21 @@ static int max8997_i2c_probe(struct i2c_client *i2c,
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i2c_set_clientdata(i2c, max8997);
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max8997->dev = &i2c->dev;
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max8997->i2c = i2c;
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max8997->type = id->driver_data;
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max8997->type = max8997_i2c_get_driver_data(i2c, id);
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max8997->irq = i2c->irq;
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if (max8997->dev->of_node) {
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pdata = max8997_i2c_parse_dt_pdata(max8997->dev);
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if (IS_ERR(pdata)) {
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ret = PTR_ERR(pdata);
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goto err;
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}
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}
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if (!pdata)
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goto err;
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max8997->pdata = pdata;
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max8997->ono = pdata->ono;
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mutex_init(&max8997->iolock);
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@ -434,6 +504,7 @@ static struct i2c_driver max8997_i2c_driver = {
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.name = "max8997",
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.owner = THIS_MODULE,
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.pm = &max8997_pm,
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.of_match_table = of_match_ptr(max8997_pmic_dt_match),
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},
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.probe = max8997_i2c_probe,
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.remove = max8997_i2c_remove,
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|
|
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@ -24,6 +24,7 @@
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#include <linux/bug.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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@ -31,6 +32,7 @@
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#include <linux/regulator/machine.h>
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#include <linux/mfd/max8997.h>
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#include <linux/mfd/max8997-private.h>
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#include <linux/regulator/of_regulator.h>
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struct max8997_data {
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struct device *dev;
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@ -933,22 +935,163 @@ static struct regulator_desc regulators[] = {
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max8997_charger_fixedstate_ops),
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};
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#ifdef CONFIG_OF
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static int max8997_pmic_dt_parse_dvs_gpio(struct max8997_dev *iodev,
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struct max8997_platform_data *pdata,
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struct device_node *pmic_np)
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{
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int i, gpio;
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||||
|
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for (i = 0; i < 3; i++) {
|
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gpio = of_get_named_gpio(pmic_np,
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"max8997,pmic-buck125-dvs-gpios", i);
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if (!gpio_is_valid(gpio)) {
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dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
|
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return -EINVAL;
|
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}
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pdata->buck125_gpios[i] = gpio;
|
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}
|
||||
return 0;
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}
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|
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static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev,
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||||
struct max8997_platform_data *pdata)
|
||||
{
|
||||
struct device_node *pmic_np, *regulators_np, *reg_np;
|
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struct max8997_regulator_data *rdata;
|
||||
unsigned int i, dvs_voltage_nr = 1, ret;
|
||||
|
||||
pmic_np = iodev->dev->of_node;
|
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if (!pmic_np) {
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dev_err(iodev->dev, "could not find pmic sub-node\n");
|
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return -ENODEV;
|
||||
}
|
||||
|
||||
regulators_np = of_find_node_by_name(pmic_np, "regulators");
|
||||
if (!regulators_np) {
|
||||
dev_err(iodev->dev, "could not find regulators sub-node\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* count the number of regulators to be supported in pmic */
|
||||
pdata->num_regulators = 0;
|
||||
for_each_child_of_node(regulators_np, reg_np)
|
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pdata->num_regulators++;
|
||||
|
||||
rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
|
||||
pdata->num_regulators, GFP_KERNEL);
|
||||
if (!rdata) {
|
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dev_err(iodev->dev, "could not allocate memory for "
|
||||
"regulator data\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
pdata->regulators = rdata;
|
||||
for_each_child_of_node(regulators_np, reg_np) {
|
||||
for (i = 0; i < ARRAY_SIZE(regulators); i++)
|
||||
if (!of_node_cmp(reg_np->name, regulators[i].name))
|
||||
break;
|
||||
|
||||
if (i == ARRAY_SIZE(regulators)) {
|
||||
dev_warn(iodev->dev, "don't know how to configure "
|
||||
"regulator %s\n", reg_np->name);
|
||||
continue;
|
||||
}
|
||||
|
||||
rdata->id = i;
|
||||
rdata->initdata = of_get_regulator_init_data(
|
||||
iodev->dev, reg_np);
|
||||
rdata->reg_node = reg_np;
|
||||
rdata++;
|
||||
}
|
||||
|
||||
if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL))
|
||||
pdata->buck1_gpiodvs = true;
|
||||
|
||||
if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL))
|
||||
pdata->buck2_gpiodvs = true;
|
||||
|
||||
if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL))
|
||||
pdata->buck5_gpiodvs = true;
|
||||
|
||||
if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
|
||||
pdata->buck5_gpiodvs) {
|
||||
ret = max8997_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
|
||||
if (ret)
|
||||
return -EINVAL;
|
||||
|
||||
if (of_property_read_u32(pmic_np,
|
||||
"max8997,pmic-buck125-default-dvs-idx",
|
||||
&pdata->buck125_default_idx)) {
|
||||
pdata->buck125_default_idx = 0;
|
||||
} else {
|
||||
if (pdata->buck125_default_idx >= 8) {
|
||||
pdata->buck125_default_idx = 0;
|
||||
dev_info(iodev->dev, "invalid value for "
|
||||
"default dvs index, using 0 instead\n");
|
||||
}
|
||||
}
|
||||
|
||||
if (of_get_property(pmic_np,
|
||||
"max8997,pmic-ignore-gpiodvs-side-effect", NULL))
|
||||
pdata->ignore_gpiodvs_side_effect = true;
|
||||
|
||||
dvs_voltage_nr = 8;
|
||||
}
|
||||
|
||||
if (of_property_read_u32_array(pmic_np,
|
||||
"max8997,pmic-buck1-dvs-voltage",
|
||||
pdata->buck1_voltage, dvs_voltage_nr)) {
|
||||
dev_err(iodev->dev, "buck1 voltages not specified\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (of_property_read_u32_array(pmic_np,
|
||||
"max8997,pmic-buck2-dvs-voltage",
|
||||
pdata->buck2_voltage, dvs_voltage_nr)) {
|
||||
dev_err(iodev->dev, "buck2 voltages not specified\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (of_property_read_u32_array(pmic_np,
|
||||
"max8997,pmic-buck5-dvs-voltage",
|
||||
pdata->buck5_voltage, dvs_voltage_nr)) {
|
||||
dev_err(iodev->dev, "buck5 voltages not specified\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev,
|
||||
struct max8997_platform_data *pdata)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif /* CONFIG_OF */
|
||||
|
||||
static int max8997_pmic_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
|
||||
struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
|
||||
struct max8997_platform_data *pdata = iodev->pdata;
|
||||
struct regulator_config config = { };
|
||||
struct regulator_dev **rdev;
|
||||
struct max8997_data *max8997;
|
||||
struct i2c_client *i2c;
|
||||
int i, ret, size;
|
||||
int i, ret, size, nr_dvs;
|
||||
u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
|
||||
|
||||
if (!pdata) {
|
||||
if (IS_ERR_OR_NULL(pdata)) {
|
||||
dev_err(pdev->dev.parent, "No platform init data supplied.\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (iodev->dev->of_node) {
|
||||
ret = max8997_pmic_dt_parse_pdata(iodev, pdata);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data),
|
||||
GFP_KERNEL);
|
||||
if (!max8997)
|
||||
|
|
@ -973,7 +1116,10 @@ static int max8997_pmic_probe(struct platform_device *pdev)
|
|||
memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
|
||||
max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
|
||||
|
||||
for (i = 0; i < 8; i++) {
|
||||
nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
|
||||
pdata->buck5_gpiodvs) ? 8 : 1;
|
||||
|
||||
for (i = 0; i < nr_dvs; i++) {
|
||||
max8997->buck1_vol[i] = ret =
|
||||
max8997_get_voltage_proper_val(
|
||||
&buck1245_voltage_map_desc,
|
||||
|
|
@ -1019,6 +1165,19 @@ static int max8997_pmic_probe(struct platform_device *pdev)
|
|||
max_buck5, 0x3f);
|
||||
}
|
||||
|
||||
/* Initialize all the DVS related BUCK registers */
|
||||
for (i = 0; i < nr_dvs; i++) {
|
||||
max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
|
||||
max8997->buck1_vol[i],
|
||||
0x3f);
|
||||
max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
|
||||
max8997->buck2_vol[i],
|
||||
0x3f);
|
||||
max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
|
||||
max8997->buck5_vol[i],
|
||||
0x3f);
|
||||
}
|
||||
|
||||
/*
|
||||
* If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
|
||||
* If at least one of them cares, set gpios.
|
||||
|
|
@ -1068,19 +1227,6 @@ static int max8997_pmic_probe(struct platform_device *pdev)
|
|||
max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
|
||||
(1 << 1) : (0 << 1), 1 << 1);
|
||||
|
||||
/* Initialize all the DVS related BUCK registers */
|
||||
for (i = 0; i < 8; i++) {
|
||||
max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
|
||||
max8997->buck1_vol[i],
|
||||
0x3f);
|
||||
max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
|
||||
max8997->buck2_vol[i],
|
||||
0x3f);
|
||||
max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
|
||||
max8997->buck5_vol[i],
|
||||
0x3f);
|
||||
}
|
||||
|
||||
/* Misc Settings */
|
||||
max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
|
||||
max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
|
||||
|
|
@ -1101,6 +1247,7 @@ static int max8997_pmic_probe(struct platform_device *pdev)
|
|||
config.dev = max8997->dev;
|
||||
config.init_data = pdata->regulators[i].initdata;
|
||||
config.driver_data = max8997;
|
||||
config.of_node = pdata->regulators[i].reg_node;
|
||||
|
||||
rdev[i] = regulator_register(®ulators[id], &config);
|
||||
if (IS_ERR(rdev[i])) {
|
||||
|
|
|
|||
|
|
@ -316,6 +316,7 @@ enum max8997_irq {
|
|||
#define MAX8997_NUM_GPIO 12
|
||||
struct max8997_dev {
|
||||
struct device *dev;
|
||||
struct max8997_platform_data *pdata;
|
||||
struct i2c_client *i2c; /* 0xcc / PMIC, Battery Control, and FLASH */
|
||||
struct i2c_client *rtc; /* slave addr 0x0c */
|
||||
struct i2c_client *haptic; /* slave addr 0x90 */
|
||||
|
|
|
|||
|
|
@ -75,6 +75,7 @@ enum max8998_regulators {
|
|||
struct max8997_regulator_data {
|
||||
int id;
|
||||
struct regulator_init_data *initdata;
|
||||
struct device_node *reg_node;
|
||||
};
|
||||
|
||||
enum max8997_muic_usb_type {
|
||||
|
|
|
|||
Loading…
Reference in New Issue