507 lines
12 KiB
C
507 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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//
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// Copyright (c) 2012 Samsung Electronics Co., Ltd
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// http://www.samsung.com
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_irq.h>
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#include <linux/interrupt.h>
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#include <linux/pm_runtime.h>
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#include <linux/mutex.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/s2mpa01.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/mfd/samsung/s2mps14.h>
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#include <linux/mfd/samsung/s2mps15.h>
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#include <linux/mfd/samsung/s2mpu02.h>
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#include <linux/mfd/samsung/s5m8763.h>
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#include <linux/mfd/samsung/s5m8767.h>
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#include <linux/regmap.h>
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static const struct mfd_cell s5m8751_devs[] = {
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{ .name = "s5m8751-pmic", },
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{ .name = "s5m-charger", },
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{ .name = "s5m8751-codec", },
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};
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static const struct mfd_cell s5m8763_devs[] = {
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{ .name = "s5m8763-pmic", },
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{ .name = "s5m-rtc", },
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{ .name = "s5m-charger", },
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};
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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 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 of_device_id sec_dt_match[] = {
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{
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.compatible = "samsung,s5m8767-pmic",
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.data = (void *)S5M8767X,
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}, {
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.compatible = "samsung,s2mps11-pmic",
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.data = (void *)S2MPS11X,
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}, {
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.compatible = "samsung,s2mps13-pmic",
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.data = (void *)S2MPS13X,
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}, {
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.compatible = "samsung,s2mps14-pmic",
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.data = (void *)S2MPS14X,
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}, {
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.compatible = "samsung,s2mps15-pmic",
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.data = (void *)S2MPS15X,
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}, {
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.compatible = "samsung,s2mpa01-pmic",
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.data = (void *)S2MPA01,
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}, {
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.compatible = "samsung,s2mpu02-pmic",
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.data = (void *)S2MPU02,
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}, {
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/* Sentinel */
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},
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};
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MODULE_DEVICE_TABLE(of, sec_dt_match);
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static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case S2MPA01_REG_INT1M:
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case S2MPA01_REG_INT2M:
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case S2MPA01_REG_INT3M:
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return false;
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default:
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return true;
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}
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}
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static bool s2mps11_volatile(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case S2MPS11_REG_INT1M:
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case S2MPS11_REG_INT2M:
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case S2MPS11_REG_INT3M:
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return false;
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default:
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return true;
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}
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}
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static bool s2mpu02_volatile(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case S2MPU02_REG_INT1M:
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case S2MPU02_REG_INT2M:
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case S2MPU02_REG_INT3M:
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return false;
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default:
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return true;
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}
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}
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static bool s5m8763_volatile(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case S5M8763_REG_IRQM1:
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case S5M8763_REG_IRQM2:
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case S5M8763_REG_IRQM3:
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case S5M8763_REG_IRQM4:
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return false;
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default:
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return true;
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}
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}
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static const struct regmap_config sec_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static const struct regmap_config s2mpa01_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = S2MPA01_REG_LDO_OVCB4,
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.volatile_reg = s2mpa01_volatile,
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.cache_type = REGCACHE_FLAT,
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};
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static const struct regmap_config s2mps11_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = S2MPS11_REG_L38CTRL,
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.volatile_reg = s2mps11_volatile,
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.cache_type = REGCACHE_FLAT,
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};
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static const struct regmap_config s2mps13_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = S2MPS13_REG_LDODSCH5,
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.volatile_reg = s2mps11_volatile,
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.cache_type = REGCACHE_FLAT,
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};
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static const struct regmap_config s2mps14_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = S2MPS14_REG_LDODSCH3,
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.volatile_reg = s2mps11_volatile,
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.cache_type = REGCACHE_FLAT,
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};
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static const struct regmap_config s2mps15_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = S2MPS15_REG_LDODSCH4,
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.volatile_reg = s2mps11_volatile,
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.cache_type = REGCACHE_FLAT,
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};
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static const struct regmap_config s2mpu02_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = S2MPU02_REG_DVSDATA,
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.volatile_reg = s2mpu02_volatile,
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.cache_type = REGCACHE_FLAT,
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};
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static const struct regmap_config s5m8763_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = S5M8763_REG_LBCNFG2,
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.volatile_reg = s5m8763_volatile,
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.cache_type = REGCACHE_FLAT,
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};
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static const struct regmap_config s5m8767_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = S5M8767_REG_LDO28CTRL,
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.volatile_reg = s2mps11_volatile,
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.cache_type = REGCACHE_FLAT,
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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_i2c_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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static int sec_pmic_probe(struct i2c_client *i2c)
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{
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const struct regmap_config *regmap;
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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(&i2c->dev, sizeof(struct sec_pmic_dev),
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GFP_KERNEL);
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if (sec_pmic == NULL)
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return -ENOMEM;
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i2c_set_clientdata(i2c, sec_pmic);
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sec_pmic->dev = &i2c->dev;
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sec_pmic->i2c = i2c;
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sec_pmic->irq = i2c->irq;
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pdata = sec_pmic_i2c_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->device_type = (unsigned long)of_device_get_match_data(sec_pmic->dev);
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sec_pmic->pdata = pdata;
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switch (sec_pmic->device_type) {
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case S2MPA01:
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regmap = &s2mpa01_regmap_config;
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break;
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case S2MPS11X:
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regmap = &s2mps11_regmap_config;
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break;
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case S2MPS13X:
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regmap = &s2mps13_regmap_config;
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break;
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case S2MPS14X:
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regmap = &s2mps14_regmap_config;
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break;
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case S2MPS15X:
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regmap = &s2mps15_regmap_config;
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break;
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case S5M8763X:
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regmap = &s5m8763_regmap_config;
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break;
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case S5M8767X:
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regmap = &s5m8767_regmap_config;
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break;
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case S2MPU02:
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regmap = &s2mpu02_regmap_config;
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break;
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default:
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regmap = &sec_regmap_config;
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||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
|
||
|
|
if (IS_ERR(sec_pmic->regmap_pmic)) {
|
||
|
|
ret = PTR_ERR(sec_pmic->regmap_pmic);
|
||
|
|
dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
|
||
|
|
ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
sec_irq_init(sec_pmic);
|
||
|
|
|
||
|
|
pm_runtime_set_active(sec_pmic->dev);
|
||
|
|
|
||
|
|
switch (sec_pmic->device_type) {
|
||
|
|
case S5M8751X:
|
||
|
|
sec_devs = s5m8751_devs;
|
||
|
|
num_sec_devs = ARRAY_SIZE(s5m8751_devs);
|
||
|
|
break;
|
||
|
|
case S5M8763X:
|
||
|
|
sec_devs = s5m8763_devs;
|
||
|
|
num_sec_devs = ARRAY_SIZE(s5m8763_devs);
|
||
|
|
break;
|
||
|
|
case S5M8767X:
|
||
|
|
sec_devs = s5m8767_devs;
|
||
|
|
num_sec_devs = ARRAY_SIZE(s5m8767_devs);
|
||
|
|
break;
|
||
|
|
case S2MPA01:
|
||
|
|
sec_devs = s2mpa01_devs;
|
||
|
|
num_sec_devs = ARRAY_SIZE(s2mpa01_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;
|
||
|
|
default:
|
||
|
|
dev_err(&i2c->dev, "Unsupported device type (%lu)\n",
|
||
|
|
sec_pmic->device_type);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sec_pmic_shutdown(struct i2c_client *i2c)
|
||
|
|
{
|
||
|
|
struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
|
||
|
|
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 %lu for manual power off\n",
|
||
|
|
sec_pmic->device_type);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sec_pmic_suspend(struct device *dev)
|
||
|
|
{
|
||
|
|
struct i2c_client *i2c = to_i2c_client(dev);
|
||
|
|
struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
|
||
|
|
|
||
|
|
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 i2c_client *i2c = to_i2c_client(dev);
|
||
|
|
struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
|
||
|
|
|
||
|
|
if (device_may_wakeup(dev))
|
||
|
|
disable_irq_wake(sec_pmic->irq);
|
||
|
|
enable_irq(sec_pmic->irq);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DEFINE_SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops,
|
||
|
|
sec_pmic_suspend, sec_pmic_resume);
|
||
|
|
|
||
|
|
static struct i2c_driver sec_pmic_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "sec_pmic",
|
||
|
|
.pm = pm_sleep_ptr(&sec_pmic_pm_ops),
|
||
|
|
.of_match_table = sec_dt_match,
|
||
|
|
},
|
||
|
|
.probe_new = sec_pmic_probe,
|
||
|
|
.shutdown = sec_pmic_shutdown,
|
||
|
|
};
|
||
|
|
module_i2c_driver(sec_pmic_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
|
||
|
|
MODULE_DESCRIPTION("Core support for the S5M MFD");
|
||
|
|
MODULE_LICENSE("GPL");
|