diff options
Diffstat (limited to 'drivers/mfd/sec-common.c')
| -rw-r--r-- | drivers/mfd/sec-common.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/drivers/mfd/sec-common.c b/drivers/mfd/sec-common.c new file mode 100644 index 000000000000..42d55e70e34c --- /dev/null +++ b/drivers/mfd/sec-common.c @@ -0,0 +1,301 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2012 Samsung Electronics Co., Ltd + * http://www.samsung.com + * Copyright 2025 Linaro Ltd. + * + * Samsung SxM core driver + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/export.h> +#include <linux/interrupt.h> +#include <linux/mfd/core.h> +#include <linux/mfd/samsung/core.h> +#include <linux/mfd/samsung/irq.h> +#include <linux/mfd/samsung/s2mps11.h> +#include <linux/mfd/samsung/s2mps13.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include "sec-core.h" + +static const struct mfd_cell s5m8767_devs[] = { + MFD_CELL_NAME("s5m8767-pmic"), + MFD_CELL_NAME("s5m-rtc"), + MFD_CELL_OF("s5m8767-clk", NULL, NULL, 0, 0, "samsung,s5m8767-clk"), +}; + +static const struct mfd_cell s2dos05_devs[] = { + MFD_CELL_NAME("s2dos05-regulator"), +}; + +static const struct mfd_cell s2mpg10_devs[] = { + MFD_CELL_NAME("s2mpg10-meter"), + MFD_CELL_NAME("s2mpg10-regulator"), + MFD_CELL_NAME("s2mpg10-rtc"), + MFD_CELL_OF("s2mpg10-clk", NULL, NULL, 0, 0, "samsung,s2mpg10-clk"), + MFD_CELL_OF("s2mpg10-gpio", NULL, NULL, 0, 0, "samsung,s2mpg10-gpio"), +}; + +static const struct mfd_cell s2mps11_devs[] = { + MFD_CELL_NAME("s2mps11-regulator"), + MFD_CELL_NAME("s2mps14-rtc"), + MFD_CELL_OF("s2mps11-clk", NULL, NULL, 0, 0, "samsung,s2mps11-clk"), +}; + +static const struct mfd_cell s2mps13_devs[] = { + MFD_CELL_NAME("s2mps13-regulator"), + MFD_CELL_NAME("s2mps13-rtc"), + MFD_CELL_OF("s2mps13-clk", NULL, NULL, 0, 0, "samsung,s2mps13-clk"), +}; + +static const struct mfd_cell s2mps14_devs[] = { + MFD_CELL_NAME("s2mps14-regulator"), + MFD_CELL_NAME("s2mps14-rtc"), + MFD_CELL_OF("s2mps14-clk", NULL, NULL, 0, 0, "samsung,s2mps14-clk"), +}; + +static const struct mfd_cell s2mps15_devs[] = { + MFD_CELL_NAME("s2mps15-regulator"), + MFD_CELL_NAME("s2mps15-rtc"), + MFD_CELL_OF("s2mps13-clk", NULL, NULL, 0, 0, "samsung,s2mps13-clk"), +}; + +static const struct mfd_cell s2mpa01_devs[] = { + MFD_CELL_NAME("s2mpa01-pmic"), + MFD_CELL_NAME("s2mps14-rtc"), +}; + +static const struct mfd_cell s2mpu02_devs[] = { + MFD_CELL_NAME("s2mpu02-regulator"), +}; + +static const struct mfd_cell s2mpu05_devs[] = { + MFD_CELL_NAME("s2mpu05-regulator"), + MFD_CELL_NAME("s2mps15-rtc"), +}; + +static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic) +{ + unsigned int val; + + /* For s2mpg1x, the revision is in a different regmap */ + if (sec_pmic->device_type == S2MPG10) + return; + + /* For each device type, the REG_ID is always the first register */ + if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val)) + dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val); +} + +static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic) +{ + int err; + + if (sec_pmic->device_type != S2MPS13X) + return; + + if (sec_pmic->pdata->disable_wrstbi) { + /* + * If WRSTBI pin is pulled down this feature must be disabled + * because each Suspend to RAM will trigger buck voltage reset + * to default values. + */ + err = regmap_update_bits(sec_pmic->regmap_pmic, + S2MPS13_REG_WRSTBI, + S2MPS13_REG_WRSTBI_MASK, 0x0); + if (err) + dev_warn(sec_pmic->dev, + "Cannot initialize WRSTBI config: %d\n", + err); + } +} + +/* + * Only the common platform data elements for s5m8767 are parsed here from the + * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and + * others have to parse their own platform data elements from device tree. + * + * The s5m8767 platform data structure is instantiated here and the drivers for + * the sub-modules need not instantiate another instance while parsing their + * platform data. + */ +static struct sec_platform_data * +sec_pmic_parse_dt_pdata(struct device *dev) +{ + struct sec_platform_data *pd; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) + return ERR_PTR(-ENOMEM); + + pd->manual_poweroff = of_property_read_bool(dev->of_node, + "samsung,s2mps11-acokb-ground"); + pd->disable_wrstbi = of_property_read_bool(dev->of_node, + "samsung,s2mps11-wrstbi-ground"); + return pd; +} + +int sec_pmic_probe(struct device *dev, int device_type, unsigned int irq, + struct regmap *regmap, struct i2c_client *client) +{ + struct sec_platform_data *pdata; + const struct mfd_cell *sec_devs; + struct sec_pmic_dev *sec_pmic; + int ret, num_sec_devs; + + sec_pmic = devm_kzalloc(dev, sizeof(*sec_pmic), GFP_KERNEL); + if (!sec_pmic) + return -ENOMEM; + + dev_set_drvdata(dev, sec_pmic); + sec_pmic->dev = dev; + sec_pmic->device_type = device_type; + sec_pmic->i2c = client; + sec_pmic->irq = irq; + sec_pmic->regmap_pmic = regmap; + + pdata = sec_pmic_parse_dt_pdata(sec_pmic->dev); + if (IS_ERR(pdata)) { + ret = PTR_ERR(pdata); + return ret; + } + + sec_pmic->pdata = pdata; + + ret = sec_irq_init(sec_pmic); + if (ret) + return ret; + + pm_runtime_set_active(sec_pmic->dev); + + switch (sec_pmic->device_type) { + case S5M8767X: + sec_devs = s5m8767_devs; + num_sec_devs = ARRAY_SIZE(s5m8767_devs); + break; + case S2DOS05: + sec_devs = s2dos05_devs; + num_sec_devs = ARRAY_SIZE(s2dos05_devs); + break; + case S2MPA01: + sec_devs = s2mpa01_devs; + num_sec_devs = ARRAY_SIZE(s2mpa01_devs); + break; + case S2MPG10: + sec_devs = s2mpg10_devs; + num_sec_devs = ARRAY_SIZE(s2mpg10_devs); + break; + case S2MPS11X: + sec_devs = s2mps11_devs; + num_sec_devs = ARRAY_SIZE(s2mps11_devs); + break; + case S2MPS13X: + sec_devs = s2mps13_devs; + num_sec_devs = ARRAY_SIZE(s2mps13_devs); + break; + case S2MPS14X: + sec_devs = s2mps14_devs; + num_sec_devs = ARRAY_SIZE(s2mps14_devs); + break; + case S2MPS15X: + sec_devs = s2mps15_devs; + num_sec_devs = ARRAY_SIZE(s2mps15_devs); + break; + case S2MPU02: + sec_devs = s2mpu02_devs; + num_sec_devs = ARRAY_SIZE(s2mpu02_devs); + break; + case S2MPU05: + sec_devs = s2mpu05_devs; + num_sec_devs = ARRAY_SIZE(s2mpu05_devs); + break; + default: + return dev_err_probe(sec_pmic->dev, -EINVAL, + "Unsupported device type %d\n", + sec_pmic->device_type); + } + ret = devm_mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs, + NULL, 0, NULL); + if (ret) + return ret; + + sec_pmic_configure(sec_pmic); + sec_pmic_dump_rev(sec_pmic); + + return ret; +} +EXPORT_SYMBOL_GPL(sec_pmic_probe); + +void sec_pmic_shutdown(struct device *dev) +{ + struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev); + unsigned int reg, mask; + + if (!sec_pmic->pdata->manual_poweroff) + return; + + switch (sec_pmic->device_type) { + case S2MPS11X: + reg = S2MPS11_REG_CTRL1; + mask = S2MPS11_CTRL1_PWRHOLD_MASK; + break; + default: + /* + * Currently only one board with S2MPS11 needs this, so just + * ignore the rest. + */ + dev_warn(sec_pmic->dev, + "Unsupported device %d for manual power off\n", + sec_pmic->device_type); + return; + } + + regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0); +} +EXPORT_SYMBOL_GPL(sec_pmic_shutdown); + +static int sec_pmic_suspend(struct device *dev) +{ + struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(sec_pmic->irq); + /* + * PMIC IRQ must be disabled during suspend for RTC alarm + * to work properly. + * When device is woken up from suspend, an + * interrupt occurs before resuming I2C bus controller. + * The interrupt is handled by regmap_irq_thread which tries + * to read RTC registers. This read fails (I2C is still + * suspended) and RTC Alarm interrupt is disabled. + */ + disable_irq(sec_pmic->irq); + + return 0; +} + +static int sec_pmic_resume(struct device *dev) +{ + struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(sec_pmic->irq); + enable_irq(sec_pmic->irq); + + return 0; +} + +DEFINE_SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume); +EXPORT_SYMBOL_GPL(sec_pmic_pm_ops); + +MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); +MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>"); +MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); +MODULE_AUTHOR("André Draszik <andre.draszik@linaro.org>"); +MODULE_DESCRIPTION("Core driver for the Samsung S5M"); +MODULE_LICENSE("GPL"); |