mirror of https://gitee.com/openkylin/linux.git
regulator: max8925: support dt for regulator
Signed-off-by: Qing Xu <qingx@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Qing Xu
Mark Brown
parent
3d70f8c617
commit
45b6f8e8fc
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@ -0,0 +1,29 @@
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Max8925 Voltage regulators
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max8925 regulator device register is still handled by mfd_add_devices, not by
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of_xxx, so, it is not necessary to add compatible name. Also, those reg
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offset and id info is stored in mfd_cell(see max8925-core.c), as a result
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there is not private properties in dts.
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node's name should match with the definition in max8925_regulator_matches
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(see max8925-regulator.c)
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Optional properties:
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- Any optional property defined in bindings/regulator/regulator.txt
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Example:
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regulators {
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SDV1 {
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regulator-min-microvolt = <637500>;
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regulator-max-microvolt = <1425000>;
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regulator-boot-on;
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regulator-always-on;
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};
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...
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...
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}
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@ -17,6 +17,8 @@
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/mfd/max8925.h>
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#include <linux/of.h>
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#include <linux/regulator/of_regulator.h>
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#define SD1_DVM_VMIN 850000
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#define SD1_DVM_VMAX 1000000
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@ -187,6 +189,34 @@ static struct regulator_ops max8925_regulator_ldo_ops = {
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.enable_reg = MAX8925_LDOCTL##_id, \
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}
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#ifdef CONFIG_OF
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static struct of_regulator_match max8925_regulator_matches[] = {
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{ .name = "SDV1",},
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{ .name = "SDV2",},
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{ .name = "SDV3",},
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{ .name = "LDO1",},
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{ .name = "LDO2",},
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{ .name = "LDO3",},
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{ .name = "LDO4",},
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{ .name = "LDO5",},
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{ .name = "LDO6",},
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{ .name = "LDO7",},
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{ .name = "LDO8",},
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{ .name = "LDO9",},
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{ .name = "LDO10",},
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{ .name = "LDO11",},
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{ .name = "LDO12",},
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{ .name = "LDO13",},
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{ .name = "LDO14",},
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{ .name = "LDO15",},
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{ .name = "LDO16",},
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{ .name = "LDO17",},
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{ .name = "LDO18",},
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{ .name = "LDO19",},
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{ .name = "LDO20",},
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};
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#endif
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static struct max8925_regulator_info max8925_regulator_info[] = {
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MAX8925_SDV(1, 637.5, 1425, 12.5),
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MAX8925_SDV(2, 650, 2225, 25),
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@ -214,6 +244,36 @@ static struct max8925_regulator_info max8925_regulator_info[] = {
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MAX8925_LDO(20, 750, 3900, 50),
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};
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#ifdef CONFIG_OF
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static int max8925_regulator_dt_init(struct platform_device *pdev,
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struct max8925_regulator_info *info,
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struct regulator_config *config,
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int ridx)
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{
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struct device_node *nproot, *np;
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int rcount;
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nproot = pdev->dev.parent->of_node;
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if (!nproot)
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return -ENODEV;
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np = of_find_node_by_name(nproot, "regulators");
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if (!np) {
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dev_err(&pdev->dev, "failed to find regulators node\n");
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return -ENODEV;
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}
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rcount = of_regulator_match(&pdev->dev, np,
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&max8925_regulator_matches[ridx], 1);
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if (rcount < 0)
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return -ENODEV;
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config->init_data = max8925_regulator_matches[ridx].init_data;
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config->of_node = max8925_regulator_matches[ridx].of_node;
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return 0;
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}
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#else
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#define max8925_regulator_dt_init(w, x, y, z) (-1)
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#endif
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static int __devinit max8925_regulator_probe(struct platform_device *pdev)
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{
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struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
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@ -222,7 +282,7 @@ static int __devinit max8925_regulator_probe(struct platform_device *pdev)
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struct max8925_regulator_info *ri;
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struct resource *res;
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struct regulator_dev *rdev;
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int i;
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int i, regulator_idx;
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res = platform_get_resource(pdev, IORESOURCE_REG, 0);
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if (!res) {
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@ -231,9 +291,12 @@ static int __devinit max8925_regulator_probe(struct platform_device *pdev)
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}
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for (i = 0; i < ARRAY_SIZE(max8925_regulator_info); i++) {
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ri = &max8925_regulator_info[i];
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if (ri->vol_reg == res->start)
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if (ri->vol_reg == res->start) {
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regulator_idx = i;
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break;
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}
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}
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if (i == ARRAY_SIZE(max8925_regulator_info)) {
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dev_err(&pdev->dev, "Failed to find regulator %llu\n",
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(unsigned long long)res->start);
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@ -243,9 +306,12 @@ static int __devinit max8925_regulator_probe(struct platform_device *pdev)
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ri->chip = chip;
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config.dev = &pdev->dev;
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config.init_data = pdata;
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config.driver_data = ri;
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if (max8925_regulator_dt_init(pdev, ri, &config, regulator_idx))
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if (pdata)
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config.init_data = pdata;
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rdev = regulator_register(&ri->desc, &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "failed to register regulator %s\n",
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