From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/regulator/stw481x-vmmc.c | 104 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 drivers/regulator/stw481x-vmmc.c (limited to 'drivers/regulator/stw481x-vmmc.c') diff --git a/drivers/regulator/stw481x-vmmc.c b/drivers/regulator/stw481x-vmmc.c new file mode 100644 index 0000000000..3958d906bd --- /dev/null +++ b/drivers/regulator/stw481x-vmmc.c @@ -0,0 +1,104 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Regulator driver for STw4810/STw4811 VMMC regulator. + * + * Copyright (C) 2013 ST-Ericsson SA + * Written on behalf of Linaro for ST-Ericsson + * + * Author: Linus Walleij + */ + +#include +#include +#include +#include +#include +#include +#include + +static const unsigned int stw481x_vmmc_voltages[] = { + 1800000, + 1800000, + 2850000, + 3000000, + 1850000, + 2600000, + 2700000, + 3300000, +}; + +static const struct regulator_ops stw481x_vmmc_ops = { + .list_voltage = regulator_list_voltage_table, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, +}; + +static const struct regulator_desc vmmc_regulator = { + .name = "VMMC", + .id = 0, + .ops = &stw481x_vmmc_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .n_voltages = ARRAY_SIZE(stw481x_vmmc_voltages), + .volt_table = stw481x_vmmc_voltages, + .enable_time = 200, /* FIXME: look this up */ + .enable_reg = STW_CONF1, + .enable_mask = STW_CONF1_PDN_VMMC | STW_CONF1_MMC_LS_STATUS, + .enable_val = STW_CONF1_PDN_VMMC, + .vsel_reg = STW_CONF1, + .vsel_mask = STW_CONF1_VMMC_MASK, +}; + +static int stw481x_vmmc_regulator_probe(struct platform_device *pdev) +{ + struct stw481x *stw481x = dev_get_platdata(&pdev->dev); + struct regulator_config config = { }; + struct regulator_dev *rdev; + int ret; + + /* First disable the external VMMC if it's active */ + ret = regmap_update_bits(stw481x->map, STW_CONF2, + STW_CONF2_VMMC_EXT, 0); + if (ret) { + dev_err(&pdev->dev, "could not disable external VMMC\n"); + return ret; + } + + /* Register VMMC regulator */ + config.dev = &pdev->dev; + config.driver_data = stw481x; + config.regmap = stw481x->map; + config.of_node = pdev->dev.of_node; + config.init_data = of_get_regulator_init_data(&pdev->dev, + pdev->dev.of_node, + &vmmc_regulator); + + rdev = devm_regulator_register(&pdev->dev, &vmmc_regulator, &config); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, + "error initializing STw481x VMMC regulator\n"); + return PTR_ERR(rdev); + } + + dev_info(&pdev->dev, "initialized STw481x VMMC regulator\n"); + return 0; +} + +static const struct of_device_id stw481x_vmmc_match[] = { + { .compatible = "st,stw481x-vmmc", }, + {}, +}; + +static struct platform_driver stw481x_vmmc_regulator_driver = { + .driver = { + .name = "stw481x-vmmc-regulator", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + .of_match_table = stw481x_vmmc_match, + }, + .probe = stw481x_vmmc_regulator_probe, +}; + +module_platform_driver(stw481x_vmmc_regulator_driver); -- cgit v1.2.3