mfd: stpmic1: Add STPMIC1 driver
STPMIC1 is a PMIC from STMicroelectronics. The STPMIC1 integrates 10
regulators, 3 power switches, a watchdog and an input for a power on key.
Signed-off-by: Pascal Paillet <p.paillet@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 8c5dfdc..0761cb8 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1871,6 +1871,22 @@
for PWM and IIO Timer. This driver allow to share the
registers between the others drivers.
+config MFD_STPMIC1
+ tristate "Support for STPMIC1 PMIC"
+ depends on (I2C=y && OF)
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ select MFD_CORE
+ help
+ Support for ST Microelectronics STPMIC1 PMIC. STPMIC1 has power on
+ key, watchdog and regulator functionalities which are supported via
+ the relevant subsystems. This driver provides core support for the
+ STPMIC1. In order to use the actual functionaltiy of the device other
+ drivers must be enabled.
+
+ To compile this driver as a module, choose M here: the
+ module will be called stpmic1.
+
menu "Multimedia Capabilities Port drivers"
depends on ARCH_SA1100
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 12980a4..a62fb01 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -233,6 +233,7 @@
obj-$(CONFIG_MFD_MT6397) += mt6397-core.o
obj-$(CONFIG_MFD_ALTERA_A10SR) += altera-a10sr.o
+obj-$(CONFIG_MFD_STPMIC1) += stpmic1.o
obj-$(CONFIG_MFD_SUN4I_GPADC) += sun4i-gpadc.o
obj-$(CONFIG_MFD_STM32_LPTIMER) += stm32-lptimer.o
diff --git a/drivers/mfd/stpmic1.c b/drivers/mfd/stpmic1.c
new file mode 100644
index 0000000..7dfbe89
--- /dev/null
+++ b/drivers/mfd/stpmic1.c
@@ -0,0 +1,213 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) STMicroelectronics 2018
+// Author: Pascal Paillet <p.paillet@st.com>
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/stpmic1.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/pm_wakeirq.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/mfd/st,stpmic1.h>
+
+#define STPMIC1_MAIN_IRQ 0
+
+static const struct regmap_range stpmic1_readable_ranges[] = {
+ regmap_reg_range(TURN_ON_SR, VERSION_SR),
+ regmap_reg_range(SWOFF_PWRCTRL_CR, LDO6_STDBY_CR),
+ regmap_reg_range(BST_SW_CR, BST_SW_CR),
+ regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4),
+ regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4),
+ regmap_reg_range(INT_MASK_R1, INT_MASK_R4),
+ regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4),
+ regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4),
+ regmap_reg_range(INT_SRC_R1, INT_SRC_R1),
+};
+
+static const struct regmap_range stpmic1_writeable_ranges[] = {
+ regmap_reg_range(SWOFF_PWRCTRL_CR, LDO6_STDBY_CR),
+ regmap_reg_range(BST_SW_CR, BST_SW_CR),
+ regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4),
+ regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4),
+ regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4),
+};
+
+static const struct regmap_range stpmic1_volatile_ranges[] = {
+ regmap_reg_range(TURN_ON_SR, VERSION_SR),
+ regmap_reg_range(WCHDG_CR, WCHDG_CR),
+ regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4),
+ regmap_reg_range(INT_SRC_R1, INT_SRC_R4),
+};
+
+static const struct regmap_access_table stpmic1_readable_table = {
+ .yes_ranges = stpmic1_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(stpmic1_readable_ranges),
+};
+
+static const struct regmap_access_table stpmic1_writeable_table = {
+ .yes_ranges = stpmic1_writeable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(stpmic1_writeable_ranges),
+};
+
+static const struct regmap_access_table stpmic1_volatile_table = {
+ .yes_ranges = stpmic1_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(stpmic1_volatile_ranges),
+};
+
+const struct regmap_config stpmic1_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .cache_type = REGCACHE_RBTREE,
+ .max_register = PMIC_MAX_REGISTER_ADDRESS,
+ .rd_table = &stpmic1_readable_table,
+ .wr_table = &stpmic1_writeable_table,
+ .volatile_table = &stpmic1_volatile_table,
+};
+
+static const struct regmap_irq stpmic1_irqs[] = {
+ REGMAP_IRQ_REG(IT_PONKEY_F, 0, 0x01),
+ REGMAP_IRQ_REG(IT_PONKEY_R, 0, 0x02),
+ REGMAP_IRQ_REG(IT_WAKEUP_F, 0, 0x04),
+ REGMAP_IRQ_REG(IT_WAKEUP_R, 0, 0x08),
+ REGMAP_IRQ_REG(IT_VBUS_OTG_F, 0, 0x10),
+ REGMAP_IRQ_REG(IT_VBUS_OTG_R, 0, 0x20),
+ REGMAP_IRQ_REG(IT_SWOUT_F, 0, 0x40),
+ REGMAP_IRQ_REG(IT_SWOUT_R, 0, 0x80),
+
+ REGMAP_IRQ_REG(IT_CURLIM_BUCK1, 1, 0x01),
+ REGMAP_IRQ_REG(IT_CURLIM_BUCK2, 1, 0x02),
+ REGMAP_IRQ_REG(IT_CURLIM_BUCK3, 1, 0x04),
+ REGMAP_IRQ_REG(IT_CURLIM_BUCK4, 1, 0x08),
+ REGMAP_IRQ_REG(IT_OCP_OTG, 1, 0x10),
+ REGMAP_IRQ_REG(IT_OCP_SWOUT, 1, 0x20),
+ REGMAP_IRQ_REG(IT_OCP_BOOST, 1, 0x40),
+ REGMAP_IRQ_REG(IT_OVP_BOOST, 1, 0x80),
+
+ REGMAP_IRQ_REG(IT_CURLIM_LDO1, 2, 0x01),
+ REGMAP_IRQ_REG(IT_CURLIM_LDO2, 2, 0x02),
+ REGMAP_IRQ_REG(IT_CURLIM_LDO3, 2, 0x04),
+ REGMAP_IRQ_REG(IT_CURLIM_LDO4, 2, 0x08),
+ REGMAP_IRQ_REG(IT_CURLIM_LDO5, 2, 0x10),
+ REGMAP_IRQ_REG(IT_CURLIM_LDO6, 2, 0x20),
+ REGMAP_IRQ_REG(IT_SHORT_SWOTG, 2, 0x40),
+ REGMAP_IRQ_REG(IT_SHORT_SWOUT, 2, 0x80),
+
+ REGMAP_IRQ_REG(IT_TWARN_F, 3, 0x01),
+ REGMAP_IRQ_REG(IT_TWARN_R, 3, 0x02),
+ REGMAP_IRQ_REG(IT_VINLOW_F, 3, 0x04),
+ REGMAP_IRQ_REG(IT_VINLOW_R, 3, 0x08),
+ REGMAP_IRQ_REG(IT_SWIN_F, 3, 0x40),
+ REGMAP_IRQ_REG(IT_SWIN_R, 3, 0x80),
+};
+
+static const struct regmap_irq_chip stpmic1_regmap_irq_chip = {
+ .name = "pmic_irq",
+ .status_base = INT_PENDING_R1,
+ .mask_base = INT_CLEAR_MASK_R1,
+ .unmask_base = INT_SET_MASK_R1,
+ .ack_base = INT_CLEAR_R1,
+ .num_regs = STPMIC1_PMIC_NUM_IRQ_REGS,
+ .irqs = stpmic1_irqs,
+ .num_irqs = ARRAY_SIZE(stpmic1_irqs),
+};
+
+static int stpmic1_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct stpmic1 *ddata;
+ struct device *dev = &i2c->dev;
+ int ret;
+ struct device_node *np = dev->of_node;
+ u32 reg;
+
+ ddata = devm_kzalloc(dev, sizeof(struct stpmic1), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, ddata);
+ ddata->dev = dev;
+
+ ddata->regmap = devm_regmap_init_i2c(i2c, &stpmic1_regmap_config);
+ if (IS_ERR(ddata->regmap))
+ return PTR_ERR(ddata->regmap);
+
+ ddata->irq = of_irq_get(np, STPMIC1_MAIN_IRQ);
+ if (ddata->irq < 0) {
+ dev_err(dev, "Failed to get main IRQ: %d\n", ddata->irq);
+ return ddata->irq;
+ }
+
+ ret = regmap_read(ddata->regmap, VERSION_SR, ®);
+ if (ret) {
+ dev_err(dev, "Unable to read PMIC version\n");
+ return ret;
+ }
+ dev_info(dev, "PMIC Chip Version: 0x%x\n", reg);
+
+ /* Initialize PMIC IRQ Chip & associated IRQ domains */
+ ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq,
+ IRQF_ONESHOT | IRQF_SHARED,
+ 0, &stpmic1_regmap_irq_chip,
+ &ddata->irq_data);
+ if (ret) {
+ dev_err(dev, "IRQ Chip registration failed: %d\n", ret);
+ return ret;
+ }
+
+ return devm_of_platform_populate(dev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int stpmic1_suspend(struct device *dev)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c);
+
+ disable_irq(pmic_dev->irq);
+
+ return 0;
+}
+
+static int stpmic1_resume(struct device *dev)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c);
+ int ret;
+
+ ret = regcache_sync(pmic_dev->regmap);
+ if (ret)
+ return ret;
+
+ enable_irq(pmic_dev->irq);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(stpmic1_pm, stpmic1_suspend, stpmic1_resume);
+
+static const struct of_device_id stpmic1_of_match[] = {
+ { .compatible = "st,stpmic1", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, stpmic1_of_match);
+
+static struct i2c_driver stpmic1_driver = {
+ .driver = {
+ .name = "stpmic1",
+ .of_match_table = of_match_ptr(stpmic1_of_match),
+ .pm = &stpmic1_pm,
+ },
+ .probe = stpmic1_probe,
+};
+
+module_i2c_driver(stpmic1_driver);
+
+MODULE_DESCRIPTION("STPMIC1 PMIC Driver");
+MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>");
+MODULE_LICENSE("GPL v2");
