projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 3615a34e LW |
1 | /* |
| 2 | * Regulator driver for STw4810/STw4811 VMMC regulator. | |
| 3 | * | |
| 4 | * Copyright (C) 2013 ST-Ericsson SA | |
| 5 | * Written on behalf of Linaro for ST-Ericsson | |
| 6 | * | |
| 7 | * Author: Linus Walleij <linus.walleij@linaro.org> | |
| 8 | * | |
| 9 | * License terms: GNU General Public License (GPL) version 2 | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/err.h> | |
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/mfd/stw481x.h> | |
| 15 | #include <linux/module.h> | |
| 16 | #include <linux/platform_device.h> | |
| 17 | #include <linux/regulator/driver.h> | |
| 18 | #include <linux/regulator/of_regulator.h> | |
| 19 | ||
| 20 | static const unsigned int stw481x_vmmc_voltages[] = { | |
| 21 | 1800000, | |
| 22 | 1800000, | |
| 23 | 2850000, | |
| 24 | 3000000, | |
| 25 | 1850000, | |
| 26 | 2600000, | |
| 27 | 2700000, | |
| 28 | 3300000, | |
| 29 | }; | |
| 30 | ||
| 31 | static struct regulator_ops stw481x_vmmc_ops = { | |
| 32 | .list_voltage = regulator_list_voltage_table, | |
| 33 | .enable = regulator_enable_regmap, | |
| 34 | .disable = regulator_disable_regmap, | |
| 35 | .is_enabled = regulator_is_enabled_regmap, | |
| 36 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
| 37 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
| 38 | }; | |
| 39 | ||
| 40 | static struct regulator_desc vmmc_regulator = { | |
| 41 | .name = "VMMC", | |
| 42 | .id = 0, | |
| 43 | .ops = &stw481x_vmmc_ops, | |
| 44 | .type = REGULATOR_VOLTAGE, | |
| 45 | .owner = THIS_MODULE, | |
| 46 | .n_voltages = ARRAY_SIZE(stw481x_vmmc_voltages), | |
| 47 | .volt_table = stw481x_vmmc_voltages, | |
| 48 | .enable_time = 200, /* FIXME: look this up */ | |
| 49 | .enable_reg = STW_CONF1, | |
| 50 | .enable_mask = STW_CONF1_PDN_VMMC, | |
| 51 | .vsel_reg = STW_CONF1, | |
| 52 | .vsel_mask = STW_CONF1_VMMC_MASK, | |
| 53 | }; | |
| 54 | ||
| 55 | static int stw481x_vmmc_regulator_probe(struct platform_device *pdev) | |
| 56 | { | |
| 57 | struct stw481x *stw481x = dev_get_platdata(&pdev->dev); | |
| 58 | struct regulator_config config = { }; | |
| 59 | int ret; | |
| 60 | ||
| 61 | /* First disable the external VMMC if it's active */ | |
| 62 | ret = regmap_update_bits(stw481x->map, STW_CONF2, | |
| 63 | STW_CONF2_VMMC_EXT, 0); | |
| 64 | if (ret) { | |
| 65 | dev_err(&pdev->dev, "could not disable external VMMC\n"); | |
| 66 | return ret; | |
| 67 | } | |
| 68 | ||
| 69 | /* Register VMMC regulator */ | |
| 70 | config.dev = &pdev->dev; | |
| 71 | config.driver_data = stw481x; | |
| 72 | config.regmap = stw481x->map; | |
| 73 | config.of_node = pdev->dev.of_node; | |
| 74 | config.init_data = of_get_regulator_init_data(&pdev->dev, | |
| 75 | pdev->dev.of_node); | |
| 76 | ||
| 77 | stw481x->vmmc_regulator = regulator_register(&vmmc_regulator, &config); | |
| 78 | if (IS_ERR(stw481x->vmmc_regulator)) { | |
| 79 | dev_err(&pdev->dev, | |
| 80 | "error initializing STw481x VMMC regulator\n"); | |
| 81 | return PTR_ERR(stw481x->vmmc_regulator); | |
| 82 | } | |
| 83 | ||
| 84 | dev_info(&pdev->dev, "initialized STw481x VMMC regulator\n"); | |
| 85 | return 0; | |
| 86 | } | |
| 87 | ||
| 88 | static int stw481x_vmmc_regulator_remove(struct platform_device *pdev) | |
| 89 | { | |
| 90 | struct stw481x *stw481x = dev_get_platdata(&pdev->dev); | |
| 91 | ||
| 92 | regulator_unregister(stw481x->vmmc_regulator); | |
| 93 | return 0; | |
| 94 | } | |
| 95 | ||
| 96 | static const struct of_device_id stw481x_vmmc_match[] = { | |
| 97 | { .compatible = "st,stw481x-vmmc", }, | |
| 98 | {}, | |
| 99 | }; | |
| 100 | ||
| 101 | static struct platform_driver stw481x_vmmc_regulator_driver = { | |
| 102 | .driver = { | |
| 103 | .name = "stw481x-vmmc-regulator", | |
| 104 | .owner = THIS_MODULE, | |
| 105 | }, | |
| 106 | .probe = stw481x_vmmc_regulator_probe, | |
| 107 | .remove = stw481x_vmmc_regulator_remove, | |
| 108 | }; | |
| 109 | ||
| 110 | module_platform_driver(stw481x_vmmc_regulator_driver); |