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680ef57915
As a preparation for adding support for Samsung's S2MPG10, which is connected via SPEEDY / ACPM rather than I2C, split out (move) all I2C-specific driver code into its own kernel module, sec-i2c, and make the existing sec-core module be just the transport-agnostic core driver kernel module. At the same time, update all defconfigs that reference the old kconfig symbol name. While at it, also update file header comments and module description(s) to drop references to 'mfd', and update comments to be C-style, not C++. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: André Draszik <andre.draszik@linaro.org> Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-8-d66d5f39b6bf@linaro.org Signed-off-by: Lee Jones <lee@kernel.org>
296 lines
7.1 KiB
C
296 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2012 Samsung Electronics Co., Ltd
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* http://www.samsung.com
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* Copyright 2025 Linaro Ltd.
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*
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* Samsung SxM core driver
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/export.h>
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#include <linux/interrupt.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/samsung/core.h>
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#include <linux/mfd/samsung/irq.h>
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#include <linux/mfd/samsung/s2mps11.h>
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#include <linux/mfd/samsung/s2mps13.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include "sec-core.h"
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static const struct mfd_cell s5m8767_devs[] = {
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{ .name = "s5m8767-pmic", },
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{ .name = "s5m-rtc", },
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{
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.name = "s5m8767-clk",
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.of_compatible = "samsung,s5m8767-clk",
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},
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};
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static const struct mfd_cell s2dos05_devs[] = {
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{ .name = "s2dos05-regulator", },
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};
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static const struct mfd_cell s2mps11_devs[] = {
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{ .name = "s2mps11-regulator", },
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{ .name = "s2mps14-rtc", },
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{
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.name = "s2mps11-clk",
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.of_compatible = "samsung,s2mps11-clk",
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},
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};
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static const struct mfd_cell s2mps13_devs[] = {
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{ .name = "s2mps13-regulator", },
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{ .name = "s2mps13-rtc", },
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{
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.name = "s2mps13-clk",
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.of_compatible = "samsung,s2mps13-clk",
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},
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};
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static const struct mfd_cell s2mps14_devs[] = {
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{ .name = "s2mps14-regulator", },
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{ .name = "s2mps14-rtc", },
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{
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.name = "s2mps14-clk",
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.of_compatible = "samsung,s2mps14-clk",
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},
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};
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static const struct mfd_cell s2mps15_devs[] = {
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{ .name = "s2mps15-regulator", },
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{ .name = "s2mps15-rtc", },
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{
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.name = "s2mps13-clk",
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.of_compatible = "samsung,s2mps13-clk",
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},
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};
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static const struct mfd_cell s2mpa01_devs[] = {
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{ .name = "s2mpa01-pmic", },
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{ .name = "s2mps14-rtc", },
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};
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static const struct mfd_cell s2mpu02_devs[] = {
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{ .name = "s2mpu02-regulator", },
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};
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static const struct mfd_cell s2mpu05_devs[] = {
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{ .name = "s2mpu05-regulator", },
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{ .name = "s2mps15-rtc", },
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};
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static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic)
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{
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unsigned int val;
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/* For each device type, the REG_ID is always the first register */
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if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val))
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dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val);
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}
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static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic)
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{
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int err;
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if (sec_pmic->device_type != S2MPS13X)
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return;
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if (sec_pmic->pdata->disable_wrstbi) {
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/*
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* If WRSTBI pin is pulled down this feature must be disabled
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* because each Suspend to RAM will trigger buck voltage reset
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* to default values.
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*/
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err = regmap_update_bits(sec_pmic->regmap_pmic,
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S2MPS13_REG_WRSTBI,
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S2MPS13_REG_WRSTBI_MASK, 0x0);
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if (err)
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dev_warn(sec_pmic->dev,
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"Cannot initialize WRSTBI config: %d\n",
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err);
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}
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}
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/*
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* Only the common platform data elements for s5m8767 are parsed here from the
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* device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
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* others have to parse their own platform data elements from device tree.
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*
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* The s5m8767 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 sec_platform_data *
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sec_pmic_parse_dt_pdata(struct device *dev)
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{
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struct sec_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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return ERR_PTR(-ENOMEM);
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pd->manual_poweroff = of_property_read_bool(dev->of_node,
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"samsung,s2mps11-acokb-ground");
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pd->disable_wrstbi = of_property_read_bool(dev->of_node,
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"samsung,s2mps11-wrstbi-ground");
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return pd;
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}
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int sec_pmic_probe(struct device *dev, unsigned long device_type,
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unsigned int irq, struct regmap *regmap,
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struct i2c_client *client)
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{
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struct sec_platform_data *pdata;
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const struct mfd_cell *sec_devs;
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struct sec_pmic_dev *sec_pmic;
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int ret, num_sec_devs;
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sec_pmic = devm_kzalloc(dev, sizeof(struct sec_pmic_dev), GFP_KERNEL);
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if (sec_pmic == NULL)
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return -ENOMEM;
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dev_set_drvdata(dev, sec_pmic);
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sec_pmic->dev = dev;
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sec_pmic->device_type = device_type;
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sec_pmic->i2c = client;
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sec_pmic->irq = irq;
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sec_pmic->regmap_pmic = regmap;
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pdata = sec_pmic_parse_dt_pdata(sec_pmic->dev);
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if (IS_ERR(pdata)) {
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ret = PTR_ERR(pdata);
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return ret;
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}
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sec_pmic->pdata = pdata;
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sec_irq_init(sec_pmic);
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pm_runtime_set_active(sec_pmic->dev);
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switch (sec_pmic->device_type) {
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case S5M8767X:
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sec_devs = s5m8767_devs;
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num_sec_devs = ARRAY_SIZE(s5m8767_devs);
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break;
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case S2DOS05:
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sec_devs = s2dos05_devs;
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num_sec_devs = ARRAY_SIZE(s2dos05_devs);
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break;
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case S2MPA01:
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sec_devs = s2mpa01_devs;
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num_sec_devs = ARRAY_SIZE(s2mpa01_devs);
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break;
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case S2MPS11X:
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sec_devs = s2mps11_devs;
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num_sec_devs = ARRAY_SIZE(s2mps11_devs);
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break;
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case S2MPS13X:
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sec_devs = s2mps13_devs;
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num_sec_devs = ARRAY_SIZE(s2mps13_devs);
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break;
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case S2MPS14X:
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sec_devs = s2mps14_devs;
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num_sec_devs = ARRAY_SIZE(s2mps14_devs);
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break;
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case S2MPS15X:
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sec_devs = s2mps15_devs;
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num_sec_devs = ARRAY_SIZE(s2mps15_devs);
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break;
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case S2MPU02:
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sec_devs = s2mpu02_devs;
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num_sec_devs = ARRAY_SIZE(s2mpu02_devs);
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break;
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case S2MPU05:
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sec_devs = s2mpu05_devs;
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num_sec_devs = ARRAY_SIZE(s2mpu05_devs);
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break;
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default:
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dev_err(sec_pmic->dev, "Unsupported device type %lu\n",
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sec_pmic->device_type);
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return -EINVAL;
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}
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ret = devm_mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs,
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NULL, 0, NULL);
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if (ret)
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return ret;
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sec_pmic_configure(sec_pmic);
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sec_pmic_dump_rev(sec_pmic);
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return ret;
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}
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EXPORT_SYMBOL_GPL(sec_pmic_probe);
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void sec_pmic_shutdown(struct device *dev)
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{
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struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev);
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unsigned int reg, mask;
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if (!sec_pmic->pdata->manual_poweroff)
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return;
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switch (sec_pmic->device_type) {
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case S2MPS11X:
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reg = S2MPS11_REG_CTRL1;
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mask = S2MPS11_CTRL1_PWRHOLD_MASK;
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break;
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default:
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/*
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* Currently only one board with S2MPS11 needs this, so just
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* ignore the rest.
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*/
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dev_warn(sec_pmic->dev,
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"Unsupported device %lu for manual power off\n",
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sec_pmic->device_type);
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return;
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}
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regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);
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}
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EXPORT_SYMBOL_GPL(sec_pmic_shutdown);
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static int sec_pmic_suspend(struct device *dev)
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{
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struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev);
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if (device_may_wakeup(dev))
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enable_irq_wake(sec_pmic->irq);
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/*
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* PMIC IRQ must be disabled during suspend for RTC alarm
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* to work properly.
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* When device is woken up from suspend, an
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* interrupt occurs before resuming I2C bus controller.
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* The interrupt is handled by regmap_irq_thread which tries
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* to read RTC registers. This read fails (I2C is still
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* suspended) and RTC Alarm interrupt is disabled.
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*/
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disable_irq(sec_pmic->irq);
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return 0;
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}
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static int sec_pmic_resume(struct device *dev)
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{
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struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev);
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if (device_may_wakeup(dev))
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disable_irq_wake(sec_pmic->irq);
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enable_irq(sec_pmic->irq);
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return 0;
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}
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DEFINE_SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
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EXPORT_SYMBOL_GPL(sec_pmic_pm_ops);
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MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
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MODULE_DESCRIPTION("Core driver for the Samsung S5M");
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MODULE_LICENSE("GPL");
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