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217c445c40
Add myself as module author, so people know whom to complain to about after the recent updates. Signed-off-by: André Draszik <andre.draszik@linaro.org> Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-23-d66d5f39b6bf@linaro.org Signed-off-by: Lee Jones <lee@kernel.org>
301 lines
7.8 KiB
C
301 lines
7.8 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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MFD_CELL_NAME("s5m8767-pmic"),
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MFD_CELL_NAME("s5m-rtc"),
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MFD_CELL_OF("s5m8767-clk", NULL, NULL, 0, 0, "samsung,s5m8767-clk"),
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};
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static const struct mfd_cell s2dos05_devs[] = {
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MFD_CELL_NAME("s2dos05-regulator"),
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};
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static const struct mfd_cell s2mpg10_devs[] = {
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MFD_CELL_NAME("s2mpg10-meter"),
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MFD_CELL_NAME("s2mpg10-regulator"),
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MFD_CELL_NAME("s2mpg10-rtc"),
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MFD_CELL_OF("s2mpg10-clk", NULL, NULL, 0, 0, "samsung,s2mpg10-clk"),
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MFD_CELL_OF("s2mpg10-gpio", NULL, NULL, 0, 0, "samsung,s2mpg10-gpio"),
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};
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static const struct mfd_cell s2mps11_devs[] = {
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MFD_CELL_NAME("s2mps11-regulator"),
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MFD_CELL_NAME("s2mps14-rtc"),
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MFD_CELL_OF("s2mps11-clk", NULL, NULL, 0, 0, "samsung,s2mps11-clk"),
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};
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static const struct mfd_cell s2mps13_devs[] = {
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MFD_CELL_NAME("s2mps13-regulator"),
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MFD_CELL_NAME("s2mps13-rtc"),
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MFD_CELL_OF("s2mps13-clk", NULL, NULL, 0, 0, "samsung,s2mps13-clk"),
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};
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static const struct mfd_cell s2mps14_devs[] = {
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MFD_CELL_NAME("s2mps14-regulator"),
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MFD_CELL_NAME("s2mps14-rtc"),
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MFD_CELL_OF("s2mps14-clk", NULL, NULL, 0, 0, "samsung,s2mps14-clk"),
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};
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static const struct mfd_cell s2mps15_devs[] = {
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MFD_CELL_NAME("s2mps15-regulator"),
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MFD_CELL_NAME("s2mps15-rtc"),
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MFD_CELL_OF("s2mps13-clk", NULL, NULL, 0, 0, "samsung,s2mps13-clk"),
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};
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static const struct mfd_cell s2mpa01_devs[] = {
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MFD_CELL_NAME("s2mpa01-pmic"),
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MFD_CELL_NAME("s2mps14-rtc"),
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};
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static const struct mfd_cell s2mpu02_devs[] = {
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MFD_CELL_NAME("s2mpu02-regulator"),
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};
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static const struct mfd_cell s2mpu05_devs[] = {
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MFD_CELL_NAME("s2mpu05-regulator"),
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MFD_CELL_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 s2mpg1x, the revision is in a different regmap */
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if (sec_pmic->device_type == S2MPG10)
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return;
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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, int device_type, unsigned int irq,
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struct regmap *regmap, 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(*sec_pmic), GFP_KERNEL);
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if (!sec_pmic)
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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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ret = sec_irq_init(sec_pmic);
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if (ret)
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return ret;
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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 S2MPG10:
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sec_devs = s2mpg10_devs;
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num_sec_devs = ARRAY_SIZE(s2mpg10_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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return dev_err_probe(sec_pmic->dev, -EINVAL,
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"Unsupported device type %d\n",
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sec_pmic->device_type);
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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 %d 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("Chanwoo Choi <cw00.choi@samsung.com>");
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MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
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MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
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MODULE_AUTHOR("André Draszik <andre.draszik@linaro.org>");
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MODULE_DESCRIPTION("Core driver for the Samsung S5M");
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MODULE_LICENSE("GPL");
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