[PATCH v6 2/5] MFD: RK808: Add new mfd driver for RK808
From: Chris Zhong
Date: Tue Aug 26 2014 - 10:15:23 EST
The RK808 chip is a power management IC for multimedia and handheld
devices. It contains the following components:
- Regulators
- RTC
- Clkout
The RK808 core driver is registered as a platform driver and provides
communication through I2C with the host device for the different
components.
Signed-off-by: Chris Zhong <zyw@xxxxxxxxxxxxxx>
Signed-off-by: Zhang Qing <zhangqing@xxxxxxxxxxxxxx>
---
Changes in v6:
Adviced by Lee Jones in v2
- rk808_i2c_client instead of g_rk808
- remove pdata form struct rk808
Changes in v5: None
Changes in v4:
Adviced by Lee Jones in v2
- modify the description in Kconfig
- remove some unnecessary header files
- remove dev from struct rk808
- use enum for define RK808_ID...
Changes in v3:
- fix compile err
Changes in v2:
Adviced by Mark Browm:
- use defines for register setting value
- remove rtc alarm disable in shutdown
- remove while(1) in shutdown
- remove read 0x2f in probe
drivers/mfd/Kconfig | 13 +++
drivers/mfd/Makefile | 1 +
drivers/mfd/rk808.c | 257 +++++++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/rk808.h | 202 +++++++++++++++++++++++++++++++++++
4 files changed, 473 insertions(+)
create mode 100644 drivers/mfd/rk808.c
create mode 100644 include/linux/mfd/rk808.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index de5abf2..2c7fdb2 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -582,6 +582,19 @@ config MFD_RC5T583
Additional drivers must be enabled in order to use the
different functionality of the device.
+config MFD_RK808
+ tristate "Rockchip RK808 Power Management chip"
+ depends on I2C
+ select MFD_CORE
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ help
+ If you say yes here you get support for the RK808
+ Power Management chips.
+ This driver provides common support for accessing the device
+ through I2C interface. The device supports multiple sub-devices
+ including interrupts, RTC, LDO & DCDC regulators, and onkey.
+
config MFD_SEC_CORE
bool "SAMSUNG Electronics PMIC Series Support"
depends on I2C=y
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index f001487..dbc28e7 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -160,6 +160,7 @@ obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o
obj-$(CONFIG_MFD_PALMAS) += palmas.o
obj-$(CONFIG_MFD_VIPERBOARD) += viperboard.o
obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o
+obj-$(CONFIG_MFD_RK808) += rk808.o
obj-$(CONFIG_MFD_SEC_CORE) += sec-core.o sec-irq.o
obj-$(CONFIG_MFD_SYSCON) += syscon.o
obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o
diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
new file mode 100644
index 0000000..f0d6518
--- /dev/null
+++ b/drivers/mfd/rk808.c
@@ -0,0 +1,257 @@
+/*
+ * MFD core driver for Rockchip RK808
+ *
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * Author: Chris Zhong <zyw@xxxxxxxxxxxxxx>
+ * Author: Zhang Qing <zhangqing@xxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/rk808.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+struct rk808_reg_data {
+ int addr;
+ int mask;
+ int value;
+};
+
+static const struct regmap_config rk808_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RK808_IO_POL_REG,
+};
+
+static struct resource rtc_resources[] = {
+ {
+ .start = RK808_IRQ_RTC_ALARM,
+ .end = RK808_IRQ_RTC_ALARM,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+static const struct mfd_cell rk808s[] = {
+ { .name = "rk808-clkout", },
+ { .name = "rk808-regulator", },
+ {
+ .name = "rk808-rtc",
+ .num_resources = ARRAY_SIZE(rtc_resources),
+ .resources = &rtc_resources[0],
+ },
+};
+
+static const struct rk808_reg_data pre_init_reg[] = {
+ { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_150MA },
+ { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_200MA },
+ { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
+ { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK, BUCK_ILMIN_200MA },
+ { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK, BUCK_ILMIN_200MA },
+ { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT |
+ VB_LO_SEL_3500MV },
+ { RK808_INT_STS_REG1, MASK_NONE, 0 },
+ { RK808_INT_STS_REG2, MASK_NONE, 0 },
+};
+
+static const struct regmap_irq rk808_irqs[] = {
+ /* INT_STS */
+ [RK808_IRQ_VOUT_LO] = {
+ .mask = RK808_IRQ_VOUT_LO_MSK,
+ .reg_offset = 0,
+ },
+ [RK808_IRQ_VB_LO] = {
+ .mask = RK808_IRQ_VB_LO_MSK,
+ .reg_offset = 0,
+ },
+ [RK808_IRQ_PWRON] = {
+ .mask = RK808_IRQ_PWRON_MSK,
+ .reg_offset = 0,
+ },
+ [RK808_IRQ_PWRON_LP] = {
+ .mask = RK808_IRQ_PWRON_LP_MSK,
+ .reg_offset = 0,
+ },
+ [RK808_IRQ_HOTDIE] = {
+ .mask = RK808_IRQ_HOTDIE_MSK,
+ .reg_offset = 0,
+ },
+ [RK808_IRQ_RTC_ALARM] = {
+ .mask = RK808_IRQ_RTC_ALARM_MSK,
+ .reg_offset = 0,
+ },
+ [RK808_IRQ_RTC_PERIOD] = {
+ .mask = RK808_IRQ_RTC_PERIOD_MSK,
+ .reg_offset = 0,
+ },
+
+ /* INT_STS2 */
+ [RK808_IRQ_PLUG_IN_INT] = {
+ .mask = RK808_IRQ_PLUG_IN_INT_MSK,
+ .reg_offset = 1,
+ },
+ [RK808_IRQ_PLUG_OUT_INT] = {
+ .mask = RK808_IRQ_PLUG_OUT_INT_MSK,
+ .reg_offset = 1,
+ },
+};
+
+static struct regmap_irq_chip rk808_irq_chip = {
+ .name = "rk808",
+ .irqs = rk808_irqs,
+ .num_irqs = ARRAY_SIZE(rk808_irqs),
+ .num_regs = 2,
+ .irq_reg_stride = 2,
+ .status_base = RK808_INT_STS_REG1,
+ .mask_base = RK808_INT_STS_MSK_REG1,
+ .ack_base = RK808_INT_STS_REG1,
+};
+
+static struct i2c_client *rk808_i2c_client;
+static void rk808_device_shutdown(void)
+{
+ int ret;
+ struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
+
+ if (!rk808) {
+ dev_warn(&rk808_i2c_client->dev,
+ "have no rk808, so do nothing here\n");
+ return;
+ }
+
+ ret = regmap_update_bits(rk808->regmap,
+ RK808_DEVCTRL_REG,
+ DEV_OFF_RST, DEV_OFF_RST);
+ if (ret)
+ dev_err(&rk808_i2c_client->dev, "power off error!\n");
+}
+
+static int rk808_pre_init(struct rk808 *rk808)
+{
+ int i;
+ int ret;
+ struct i2c_client *client = rk808->i2c;
+
+ for (i = 0; i < ARRAY_SIZE(pre_init_reg); i++) {
+ ret = regmap_update_bits(rk808->regmap, pre_init_reg[i].addr,
+ pre_init_reg[i].mask,
+ pre_init_reg[i].value);
+ if (ret) {
+ dev_err(&client->dev,
+ "0x%x write err\n", pre_init_reg[i].addr);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int rk808_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ int pm_off = 0;
+ struct rk808 *rk808;
+ struct device_node *np = client->dev.of_node;
+
+ pm_off = of_property_read_bool(np,
+ "rockchip,system-power-controller");
+
+ rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
+ if (!rk808)
+ return -ENOMEM;
+
+ rk808->i2c = client;
+ i2c_set_clientdata(client, rk808);
+
+ rk808->regmap = devm_regmap_init_i2c(client, &rk808_regmap_config);
+ if (IS_ERR(rk808->regmap)) {
+ dev_err(&client->dev, "regmap initialization failed\n");
+ return PTR_ERR(rk808->regmap);
+ }
+
+ ret = rk808_pre_init(rk808);
+ if (ret)
+ return ret;
+
+ if (!client->irq) {
+ dev_err(&client->dev, "No interrupt support, no core IRQ\n");
+ return -EINVAL;
+ }
+
+ ret = regmap_add_irq_chip(rk808->regmap, client->irq,
+ IRQF_ONESHOT, -1,
+ &rk808_irq_chip, &rk808->irq_data);
+ if (ret) {
+ dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
+ return ret;
+ }
+
+ ret = mfd_add_devices(&client->dev, -1,
+ rk808s, ARRAY_SIZE(rk808s),
+ NULL, 0, regmap_irq_get_domain(rk808->irq_data));
+ if (ret) {
+ dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
+ goto err_irq;
+ }
+
+ if (pm_off && !pm_power_off) {
+ rk808_i2c_client = client;
+ pm_power_off = rk808_device_shutdown;
+ }
+
+ return 0;
+
+err_irq:
+ regmap_del_irq_chip(client->irq, rk808->irq_data);
+ return ret;
+}
+
+static int rk808_remove(struct i2c_client *client)
+{
+ struct rk808 *rk808 = i2c_get_clientdata(client);
+
+ regmap_del_irq_chip(client->irq, rk808->irq_data);
+ mfd_remove_devices(&client->dev);
+ pm_power_off = NULL;
+ return 0;
+}
+
+static struct of_device_id rk808_of_match[] = {
+ { .compatible = "rockchip,rk808" },
+};
+MODULE_DEVICE_TABLE(of, rk808_of_match);
+
+static const struct i2c_device_id rk808_ids[] = {
+ { "rk808" },
+};
+
+MODULE_DEVICE_TABLE(i2c, rk808_ids);
+
+static struct i2c_driver rk808_i2c_driver = {
+ .driver = {
+ .name = "rk808",
+ .of_match_table = of_match_ptr(rk808_of_match),
+ },
+ .probe = rk808_probe,
+ .remove = rk808_remove,
+ .id_table = rk808_ids,
+};
+
+module_i2c_driver(rk808_i2c_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Chris Zhong <zyw@xxxxxxxxxxxxxx>");
+MODULE_AUTHOR("Zhang Qing <zhangqing@xxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("RK808 PMIC driver");
diff --git a/include/linux/mfd/rk808.h b/include/linux/mfd/rk808.h
new file mode 100644
index 0000000..7af1952
--- /dev/null
+++ b/include/linux/mfd/rk808.h
@@ -0,0 +1,202 @@
+/*
+ * rk808.h for Rockchip RK808
+ *
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * Author: Chris Zhong <zyw@xxxxxxxxxxxxxx>
+ * Author: Zhang Qing <zhangqing@xxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __LINUX_REGULATOR_rk808_H
+#define __LINUX_REGULATOR_rk808_H
+
+#include <linux/regulator/machine.h>
+#include <linux/regmap.h>
+
+/*
+ * rk808 Global Register Map.
+ */
+
+#define RK808_DCDC1 0 /* (0+RK808_START) */
+#define RK808_LDO1 4 /* (4+RK808_START) */
+#define RK808_NUM_REGULATORS 14
+
+enum rk808_reg {
+ RK808_ID_DCDC1,
+ RK808_ID_DCDC2,
+ RK808_ID_DCDC3,
+ RK808_ID_DCDC4,
+ RK808_ID_LDO1,
+ RK808_ID_LDO2,
+ RK808_ID_LDO3,
+ RK808_ID_LDO4,
+ RK808_ID_LDO5,
+ RK808_ID_LDO6,
+ RK808_ID_LDO7,
+ RK808_ID_LDO8,
+ RK808_ID_SWITCH1,
+ RK808_ID_SWITCH2,
+};
+
+#define RK808_SECONDS_REG 0x00
+#define RK808_MINUTES_REG 0x01
+#define RK808_HOURS_REG 0x02
+#define RK808_DAYS_REG 0x03
+#define RK808_MONTHS_REG 0x04
+#define RK808_YEARS_REG 0x05
+#define RK808_WEEKS_REG 0x06
+#define RK808_ALARM_SECONDS_REG 0x08
+#define RK808_ALARM_MINUTES_REG 0x09
+#define RK808_ALARM_HOURS_REG 0x0a
+#define RK808_ALARM_DAYS_REG 0x0b
+#define RK808_ALARM_MONTHS_REG 0x0c
+#define RK808_ALARM_YEARS_REG 0x0d
+#define RK808_RTC_CTRL_REG 0x10
+#define RK808_RTC_STATUS_REG 0x11
+#define RK808_RTC_INT_REG 0x12
+#define RK808_RTC_COMP_LSB_REG 0x13
+#define RK808_RTC_COMP_MSB_REG 0x14
+#define RK808_CLK32OUT_REG 0x20
+#define RK808_VB_MON_REG 0x21
+#define RK808_THERMAL_REG 0x22
+#define RK808_DCDC_EN_REG 0x23
+#define RK808_LDO_EN_REG 0x24
+#define RK808_SLEEP_SET_OFF_REG1 0x25
+#define RK808_SLEEP_SET_OFF_REG2 0x26
+#define RK808_DCDC_UV_STS_REG 0x27
+#define RK808_DCDC_UV_ACT_REG 0x28
+#define RK808_LDO_UV_STS_REG 0x29
+#define RK808_LDO_UV_ACT_REG 0x2a
+#define RK808_DCDC_PG_REG 0x2b
+#define RK808_LDO_PG_REG 0x2c
+#define RK808_VOUT_MON_TDB_REG 0x2d
+#define RK808_BUCK1_CONFIG_REG 0x2e
+#define RK808_BUCK1_ON_VSEL_REG 0x2f
+#define RK808_BUCK1_SLP_VSEL_REG 0x30
+#define RK808_BUCK1_DVS_VSEL_REG 0x31
+#define RK808_BUCK2_CONFIG_REG 0x32
+#define RK808_BUCK2_ON_VSEL_REG 0x33
+#define RK808_BUCK2_SLP_VSEL_REG 0x34
+#define RK808_BUCK2_DVS_VSEL_REG 0x35
+#define RK808_BUCK3_CONFIG_REG 0x36
+#define RK808_BUCK4_CONFIG_REG 0x37
+#define RK808_BUCK4_ON_VSEL_REG 0x38
+#define RK808_BUCK4_SLP_VSEL_REG 0x39
+#define RK808_BOOST_CONFIG_REG 0x3a
+#define RK808_LDO1_ON_VSEL_REG 0x3b
+#define RK808_LDO1_SLP_VSEL_REG 0x3c
+#define RK808_LDO2_ON_VSEL_REG 0x3d
+#define RK808_LDO2_SLP_VSEL_REG 0x3e
+#define RK808_LDO3_ON_VSEL_REG 0x3f
+#define RK808_LDO3_SLP_VSEL_REG 0x40
+#define RK808_LDO4_ON_VSEL_REG 0x41
+#define RK808_LDO4_SLP_VSEL_REG 0x42
+#define RK808_LDO5_ON_VSEL_REG 0x43
+#define RK808_LDO5_SLP_VSEL_REG 0x44
+#define RK808_LDO6_ON_VSEL_REG 0x45
+#define RK808_LDO6_SLP_VSEL_REG 0x46
+#define RK808_LDO7_ON_VSEL_REG 0x47
+#define RK808_LDO7_SLP_VSEL_REG 0x48
+#define RK808_LDO8_ON_VSEL_REG 0x49
+#define RK808_LDO8_SLP_VSEL_REG 0x4a
+#define RK808_DEVCTRL_REG 0x4b
+#define RK808_INT_STS_REG1 0x4c
+#define RK808_INT_STS_MSK_REG1 0x4d
+#define RK808_INT_STS_REG2 0x4e
+#define RK808_INT_STS_MSK_REG2 0x4f
+#define RK808_IO_POL_REG 0x50
+
+/* IRQ Definitions */
+#define RK808_IRQ_VOUT_LO 0
+#define RK808_IRQ_VB_LO 1
+#define RK808_IRQ_PWRON 2
+#define RK808_IRQ_PWRON_LP 3
+#define RK808_IRQ_HOTDIE 4
+#define RK808_IRQ_RTC_ALARM 5
+#define RK808_IRQ_RTC_PERIOD 6
+#define RK808_IRQ_PLUG_IN_INT 7
+#define RK808_IRQ_PLUG_OUT_INT 8
+#define RK808_NUM_IRQ 9
+
+#define RK808_IRQ_VOUT_LO_MSK BIT(0)
+#define RK808_IRQ_VB_LO_MSK BIT(1)
+#define RK808_IRQ_PWRON_MSK BIT(2)
+#define RK808_IRQ_PWRON_LP_MSK BIT(3)
+#define RK808_IRQ_HOTDIE_MSK BIT(4)
+#define RK808_IRQ_RTC_ALARM_MSK BIT(5)
+#define RK808_IRQ_RTC_PERIOD_MSK BIT(6)
+#define RK808_IRQ_PLUG_IN_INT_MSK BIT(0)
+#define RK808_IRQ_PLUG_OUT_INT_MSK BIT(1)
+
+#define RK808_VBAT_LOW_2V8 0x00
+#define RK808_VBAT_LOW_2V9 0x01
+#define RK808_VBAT_LOW_3V0 0x02
+#define RK808_VBAT_LOW_3V1 0x03
+#define RK808_VBAT_LOW_3V2 0x04
+#define RK808_VBAT_LOW_3V3 0x05
+#define RK808_VBAT_LOW_3V4 0x06
+#define RK808_VBAT_LOW_3V5 0x07
+#define VBAT_LOW_VOL_MASK (0x07 << 0)
+#define EN_VABT_LOW_SHUT_DOWN (0x00 << 4)
+#define EN_VBAT_LOW_IRQ (0x1 << 4)
+#define VBAT_LOW_ACT_MASK (0x1 << 4)
+
+#define BUCK_ILMIN_MASK (7 << 0)
+#define BOOST_ILMIN_MASK (7 << 0)
+#define BUCK1_RATE_MASK (3 << 3)
+#define BUCK2_RATE_MASK (3 << 3)
+#define MASK_ALL 0xff
+#define MASK_NONE 0
+
+#define SWITCH2_EN BIT(6)
+#define SWITCH1_EN BIT(5)
+#define DEV_OFF_RST BIT(3)
+
+#define VB_LO_ACT BIT(4)
+#define VB_LO_SEL_3500MV (7 << 0)
+
+#define VOUT_LO_INT BIT(0)
+#define CLK32KOUT2_EN BIT(0)
+
+enum {
+ BUCK_ILMIN_50MA,
+ BUCK_ILMIN_100MA,
+ BUCK_ILMIN_150MA,
+ BUCK_ILMIN_200MA,
+ BUCK_ILMIN_250MA,
+ BUCK_ILMIN_300MA,
+ BUCK_ILMIN_350MA,
+ BUCK_ILMIN_400MA,
+};
+
+enum {
+ BOOST_ILMIN_75MA,
+ BOOST_ILMIN_100MA,
+ BOOST_ILMIN_125MA,
+ BOOST_ILMIN_150MA,
+ BOOST_ILMIN_175MA,
+ BOOST_ILMIN_200MA,
+ BOOST_ILMIN_225MA,
+ BOOST_ILMIN_250MA,
+};
+
+struct rk808_board {
+ struct regulator_init_data *rk808_init_data[RK808_NUM_REGULATORS];
+ struct device_node *of_node[RK808_NUM_REGULATORS];
+};
+
+struct rk808 {
+ struct i2c_client *i2c;
+ struct regmap_irq_chip_data *irq_data;
+ struct regmap *regmap;
+};
+#endif /* __LINUX_REGULATOR_rk808_H */
--
1.7.9.5
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