[PATCH v4 15/27] regulator: add s2dos05 regulator support

Dzmitry Sankouski
2024-09-13T15:08:55Z

S2dos05 has 1 buck and 4 LDO regulators, used for powering
panel/touchscreen.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>

---
Changes in v4:
- remove excessive linux/module.h import
- use generic regulator helpers
- use of_match
- use devm_* for mem allocations
- use // style comment
- drop all junk Samsung code
- adjust to depend on sec-core
---
MAINTAINERS | 1 +
drivers/regulator/Kconfig | 8 ++
drivers/regulator/Makefile | 1 +
drivers/regulator/s2dos05-regulator.c | 176 ++++++++++++++++++++++++++++++++++
include/linux/regulator/s2dos05.h | 73 ++++++++++++++
5 files changed, 259 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 444cc855a01e..25dcce07180a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20476,6 +20476,7 @@ F: Documentation/devicetree/bindings/regulator/samsung,s2m*.yaml
F: Documentation/devicetree/bindings/regulator/samsung,s5m*.yaml
F: drivers/clk/clk-s2mps11.c
F: drivers/mfd/sec*.c
+F: drivers/regulator/s2dos*.c
F: drivers/regulator/s2m*.c
F: drivers/regulator/s5m*.c
F: drivers/rtc/rtc-s5m.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 4b411a09c1a6..63085d73cf74 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -1322,6 +1322,14 @@ config REGULATOR_RTQ2208
and two ldos. It features wide output voltage range from 0.4V to 2.05V
and the capability to configure the corresponding power stages.

+config REGULATOR_S2DOS05
+ tristate "SLSI S2DOS05 regulator"
+ depends on MFD_SEC_CORE || COMPILE_TEST
+ help
+ This driver provides support for the voltage regulators of the S2DOS05.
+ The S2DOS05 is a companion power management IC for the smart phones.
+ The S2DOS05 has 4 LDOs and 1 BUCK outputs.
+
config REGULATOR_S2MPA01
tristate "Samsung S2MPA01 voltage regulator"
depends on MFD_SEC_CORE || COMPILE_TEST
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index a61fa42b13c4..d26e0db7c825 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -154,6 +154,7 @@ obj-$(CONFIG_REGULATOR_RTMV20) += rtmv20-regulator.o
obj-$(CONFIG_REGULATOR_RTQ2134) += rtq2134-regulator.o
obj-$(CONFIG_REGULATOR_RTQ6752) += rtq6752-regulator.o
obj-$(CONFIG_REGULATOR_RTQ2208) += rtq2208-regulator.o
+obj-$(CONFIG_REGULATOR_S2DOS05) += s2dos05-regulator.o
obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
diff --git a/drivers/regulator/s2dos05-regulator.c b/drivers/regulator/s2dos05-regulator.c
new file mode 100644
index 000000000000..1325c8311b08
--- /dev/null
+++ b/drivers/regulator/s2dos05-regulator.c
@@ -0,0 +1,176 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// s2dos05.c - Regulator driver for the Samsung s2dos05
+//
+// Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.com>
+
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/samsung/core.h>
+#include <linux/regulator/s2dos05.h>
+#include <linux/i2c.h>
+
+struct s2dos05_data {
+ struct regmap *regmap;
+ struct device *dev;
+};
+
+static const struct regulator_ops s2dos05_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_active_discharge = regulator_set_active_discharge_regmap,
+};
+
+#define _BUCK(macro) S2DOS05_BUCK##macro
+#define _buck_ops(num) s2dos05_ops##num
+
+#define _LDO(macro) S2DOS05_LDO##macro
+#define _REG(ctrl) S2DOS05_REG##ctrl
+#define _ldo_ops(num) s2dos05_ops##num
+#define _MASK(macro) S2DOS05_ENABLE_MASK##macro
+#define _TIME(macro) S2DOS05_ENABLE_TIME##macro
+
+#define BUCK_DESC(_name, _id, _ops, m, s, v, e, em, t, a) { \
+ .name = _name, \
+ .id = _id, \
+ .ops = _ops, \
+ .of_match = of_match_ptr(_name), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = m, \
+ .uV_step = s, \
+ .n_voltages = S2DOS05_BUCK_N_VOLTAGES, \
+ .vsel_reg = v, \
+ .vsel_mask = S2DOS05_BUCK_VSEL_MASK, \
+ .enable_reg = e, \
+ .enable_mask = em, \
+ .enable_time = t, \
+ .active_discharge_off = 0, \
+ .active_discharge_on = S2DOS05_BUCK_FD_MASK, \
+ .active_discharge_reg = a, \
+ .active_discharge_mask = S2DOS05_BUCK_FD_MASK \
+}
+
+#define LDO_DESC(_name, _id, _ops, m, s, v, e, em, t, a) { \
+ .name = _name, \
+ .id = _id, \
+ .ops = _ops, \
+ .of_match = of_match_ptr(_name), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = m, \
+ .uV_step = s, \
+ .n_voltages = S2DOS05_LDO_N_VOLTAGES, \
+ .vsel_reg = v, \
+ .vsel_mask = S2DOS05_LDO_VSEL_MASK, \
+ .enable_reg = e, \
+ .enable_mask = em, \
+ .enable_time = t, \
+ .active_discharge_off = 0, \
+ .active_discharge_on = S2DOS05_LDO_FD_MASK, \
+ .active_discharge_reg = a, \
+ .active_discharge_mask = S2DOS05_LDO_FD_MASK \
+}
+
+static struct regulator_desc regulators[S2DOS05_REGULATOR_MAX] = {
+ // name, id, ops, min_uv, uV_step, vsel_reg, enable_reg
+ LDO_DESC("ldo1", _LDO(1), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP1), _REG(_LDO1_CFG),
+ _REG(_EN), _MASK(_L1), _TIME(_LDO), _REG(_LDO1_CFG)),
+ LDO_DESC("ldo2", _LDO(2), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP1), _REG(_LDO2_CFG),
+ _REG(_EN), _MASK(_L2), _TIME(_LDO), _REG(_LDO2_CFG)),
+ LDO_DESC("ldo3", _LDO(3), &_ldo_ops(), _LDO(_MIN2),
+ _LDO(_STEP1), _REG(_LDO3_CFG),
+ _REG(_EN), _MASK(_L3), _TIME(_LDO), _REG(_LDO3_CFG)),
+ LDO_DESC("ldo4", _LDO(4), &_ldo_ops(), _LDO(_MIN2),
+ _LDO(_STEP1), _REG(_LDO4_CFG),
+ _REG(_EN), _MASK(_L4), _TIME(_LDO), _REG(_LDO4_CFG)),
+ BUCK_DESC("buck1", _BUCK(1), &_buck_ops(), _BUCK(_MIN1),
+ _BUCK(_STEP1), _REG(_BUCK_VOUT),
+ _REG(_EN), _MASK(_B1), _TIME(_BUCK), _REG(_BUCK_CFG)),
+};
+
+static int s2dos05_pmic_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct of_regulator_match *rdata = NULL;
+ struct s2dos05_data *s2dos05;
+ struct regulator_config config = { };
+ unsigned int rdev_num = ARRAY_SIZE(regulators);
+ int i, ret;
+
+ s2dos05 = devm_kzalloc(dev, sizeof(struct s2dos05_data),
+ GFP_KERNEL);
+ if (!s2dos05)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, s2dos05);
+
+ rdata = devm_kcalloc(dev, rdev_num, sizeof(*rdata), GFP_KERNEL);
+ if (!rdata)
+ return -ENOMEM;
+
+ for (i = 0; i < rdev_num; i++)
+ rdata[i].name = regulators[i].name;
+
+ s2dos05->regmap = iodev->regmap_pmic;
+ s2dos05->dev = dev;
+ if (!dev->of_node)
+ dev->of_node = dev->parent->of_node;
+
+ for (i = 0; i < rdev_num; i++) {
+ struct regulator_dev *regulator;
+
+ config.init_data = rdata[i].init_data;
+ config.of_node = rdata[i].of_node;
+ config.dev = dev;
+ config.driver_data = s2dos05;
+ regulator = devm_regulator_register(&pdev->dev,
+ &regulators[i], &config);
+ if (IS_ERR(regulator)) {
+ ret = PTR_ERR(regulator);
+ dev_err(&pdev->dev, "regulator init failed for %d\n",
+ i);
+ }
+ }
+
+ return ret;
+}
+
+static const struct platform_device_id s2dos05_pmic_id[] = {
+ { "s2dos05-regulator" },
+ { },
+};
+MODULE_DEVICE_TABLE(platform, s2dos05_pmic_id);
+
+static struct platform_driver s2dos05_platform_driver = {
+ .driver = {
+ .name = "s2dos05",
+ },
+ .probe = s2dos05_pmic_probe,
+ .id_table = s2dos05_pmic_id,
+};
+module_platform_driver(s2dos05_platform_driver);
+
+MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>");
+MODULE_DESCRIPTION("SAMSUNG s2dos05 Regulator Driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/regulator/s2dos05.h b/include/linux/regulator/s2dos05.h
new file mode 100644
index 000000000000..2e89fcbce769
--- /dev/null
+++ b/include/linux/regulator/s2dos05.h
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+// s2dos05.h
+//
+// Copyright (c) 2016 Samsung Electronics Co., Ltd
+// http://www.samsung.com
+// Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.com>
+
+#ifndef __LINUX_S2DOS05_H
+#define __LINUX_S2DOS05_H
+
+// S2DOS05 registers
+// Slave Addr : 0xC0
+enum S2DOS05_reg {
+ S2DOS05_REG_DEV_ID,
+ S2DOS05_REG_TOPSYS_STAT,
+ S2DOS05_REG_STAT,
+ S2DOS05_REG_EN,
+ S2DOS05_REG_LDO1_CFG,
+ S2DOS05_REG_LDO2_CFG,
+ S2DOS05_REG_LDO3_CFG,
+ S2DOS05_REG_LDO4_CFG,
+ S2DOS05_REG_BUCK_CFG,
+ S2DOS05_REG_BUCK_VOUT,
+ S2DOS05_REG_IRQ_MASK = 0x0D,
+ S2DOS05_REG_SSD_TSD = 0x0E,
+ S2DOS05_REG_OCL = 0x10,
+ S2DOS05_REG_IRQ = 0x11
+};
+
+// S2DOS05 regulator ids
+enum S2DOS05_regulators {
+ S2DOS05_LDO1,
+ S2DOS05_LDO2,
+ S2DOS05_LDO3,
+ S2DOS05_LDO4,
+ S2DOS05_BUCK1,
+ S2DOS05_REG_MAX,
+};
+
+#define S2DOS05_IRQ_PWRMT_MASK BIT(5)
+#define S2DOS05_IRQ_TSD_MASK BIT(4)
+#define S2DOS05_IRQ_SSD_MASK BIT(3)
+#define S2DOS05_IRQ_SCP_MASK BIT(2)
+#define S2DOS05_IRQ_UVLO_MASK BIT(1)
+#define S2DOS05_IRQ_OCD_MASK BIT(0)
+
+#define S2DOS05_BUCK_MIN1 506250
+#define S2DOS05_LDO_MIN1 1500000
+#define S2DOS05_LDO_MIN2 2700000
+#define S2DOS05_BUCK_STEP1 6250
+#define S2DOS05_LDO_STEP1 25000
+#define S2DOS05_LDO_VSEL_MASK 0x7F
+#define S2DOS05_LDO_FD_MASK 0x80
+#define S2DOS05_BUCK_VSEL_MASK 0xFF
+#define S2DOS05_BUCK_FD_MASK 0x08
+
+#define S2DOS05_ENABLE_MASK_L1 BIT(0)
+#define S2DOS05_ENABLE_MASK_L2 BIT(1)
+#define S2DOS05_ENABLE_MASK_L3 BIT(2)
+#define S2DOS05_ENABLE_MASK_L4 BIT(3)
+#define S2DOS05_ENABLE_MASK_B1 BIT(4)
+
+#define S2DOS05_RAMP_DELAY 12000
+
+#define S2DOS05_ENABLE_TIME_LDO 50
+#define S2DOS05_ENABLE_TIME_BUCK 350
+
+#define S2DOS05_LDO_N_VOLTAGES (S2DOS05_LDO_VSEL_MASK + 1)
+#define S2DOS05_BUCK_N_VOLTAGES (S2DOS05_BUCK_VSEL_MASK + 1)
+
+#define S2DOS05_REGULATOR_MAX (S2DOS05_REG_MAX)
+
+#endif // __LINUX_S2DOS05_H

--
2.39.2