On Wed, 03 Sep 2014, Chris Zhong wrote:
> 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>
>
> Acked-by: Lee Jones <lee.jones@xxxxxxxxxx>
> Tested-by: Heiko <heiko@xxxxxxxxx>
Applied, thanks.
> ---
>
> Changes in v8:
> Adviced by Lee Jones
> - add Author
> - remove if(np) and of_match_ptr() since depend on OF
> - coding style
>
> Changes in v7:
> Adviced by Lee Jones
> - coding style
> - remove rk808_pre_init function
> Adviced by Doug
> - add "&& OF" to the dependencies
> - add .init_ack_masked = true in rk808_irq_chip
>
> 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 | 245 +++++++++++++++++++++++++++++++++++++++++++++
> include/linux/mfd/rk808.h | 196 ++++++++++++++++++++++++++++++++++++
> 4 files changed, 455 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..4097793 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 && OF
> + 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..0324422
> --- /dev/null
> +++ b/drivers/mfd/rk808.c
> @@ -0,0 +1,245 @@
> +/*
> + * 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 },
> +};
> +
> +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,
> + .init_ack_masked = true,
> +};
> +
> +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_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct device_node *np = client->dev.of_node;
> + struct rk808 *rk808;
> + int pm_off = 0;
> + int ret;
> + int i;
> +
> + if (!client->irq) {
> + dev_err(&client->dev, "No interrupt support, no core IRQ\n");
> + return -EINVAL;
> + }
> +
> + rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
> + if (!rk808)
> + return -ENOMEM;
> +
> + 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);
> + }
> +
> + 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;
> + }
> + }
> +
> + 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;
> + }
> +
> + rk808->i2c = client;
> + i2c_set_clientdata(client, rk808);
> +
> + 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;
> + }
> +
> + pm_off = of_property_read_bool(np,
> + "rockchip,system-power-controller");
> + 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 = 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..fb09312
> --- /dev/null
> +++ b/include/linux/mfd/rk808.h
> @@ -0,0 +1,196 @@
> +/*
> + * 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 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 {
> + struct i2c_client *i2c;
> + struct regmap_irq_chip_data *irq_data;
> + struct regmap *regmap;
> +};
> +#endif /* __LINUX_REGULATOR_rk808_H */
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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