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Subject[PATCH v8 1/5] mfd: rk808: Add RK817 and RK809 support
Date
From: Tony Xie <tony.xie@rock-chips.com>

The RK809 and RK817 are a Power Management IC (PMIC) for multimedia
and handheld devices. They contains the following components:
- Regulators
- RTC
- Clocking

Both RK809 and RK817 chips are using a similar register map,
so we can reuse the RTC and Clocking functionality.
Most of regulators have a some implementation also.

Signed-off-by: Tony Xie <tony.xie@rock-chips.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
drivers/mfd/Kconfig | 6 +-
drivers/mfd/rk808.c | 192 +++++++++++++++++++++++++++++++++++++-
include/linux/mfd/rk808.h | 172 ++++++++++++++++++++++++++++++++++
3 files changed, 364 insertions(+), 6 deletions(-)

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index d5a8e064965f..27d43faf65b0 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1006,14 +1006,14 @@ config MFD_RC5T583
different functionality of the device.

config MFD_RK808
- tristate "Rockchip RK805/RK808/RK818 Power Management Chip"
+ tristate "Rockchip RK805/RK808/RK809/RK817/RK818 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 RK805, RK808 and RK818
- Power Management chips.
+ If you say yes here you get support for the RK805, RK808, RK809,
+ RK817 and RK818 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.
diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
index 94377782d208..6ee1c461a3bb 100644
--- a/drivers/mfd/rk808.c
+++ b/drivers/mfd/rk808.c
@@ -27,6 +27,7 @@
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
+#include <linux/syscore_ops.h>

struct rk808_reg_data {
int addr;
@@ -62,6 +63,27 @@ static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
return false;
}

+static bool rk817_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ /*
+ * Notes:
+ * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
+ * we don't use that feature. It's better to cache.
+ */
+
+ switch (reg) {
+ case RK817_SECONDS_REG ... RK817_WEEKS_REG:
+ case RK817_RTC_STATUS_REG:
+ case RK817_INT_STS_REG0:
+ case RK817_INT_STS_REG1:
+ case RK817_INT_STS_REG2:
+ case RK817_SYS_STS:
+ return true;
+ }
+
+ return true;
+}
+
static const struct regmap_config rk818_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
@@ -86,6 +108,14 @@ static const struct regmap_config rk808_regmap_config = {
.volatile_reg = rk808_is_volatile_reg,
};

+static const struct regmap_config rk817_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RK817_GPIO_INT_CFG,
+ .cache_type = REGCACHE_NONE,
+ .volatile_reg = rk817_is_volatile_reg,
+};
+
static struct resource rtc_resources[] = {
{
.start = RK808_IRQ_RTC_ALARM,
@@ -94,6 +124,10 @@ static struct resource rtc_resources[] = {
}
};

+static struct resource rk817_rtc_resources[] = {
+ DEFINE_RES_IRQ(RK817_IRQ_RTC_ALARM),
+};
+
static struct resource rk805_key_resources[] = {
{
.start = RK805_IRQ_PWRON_FALL,
@@ -107,6 +141,11 @@ static struct resource rk805_key_resources[] = {
}
};

+static struct resource rk817_pwrkey_resources[] = {
+ DEFINE_RES_IRQ(RK817_IRQ_PWRON_RISE),
+ DEFINE_RES_IRQ(RK817_IRQ_PWRON_FALL),
+};
+
static const struct mfd_cell rk805s[] = {
{ .name = "rk808-clkout", },
{ .name = "rk808-regulator", },
@@ -132,6 +171,21 @@ static const struct mfd_cell rk808s[] = {
},
};

+static const struct mfd_cell rk817s[] = {
+ { .name = "rk808-clkout",},
+ { .name = "rk808-regulator",},
+ {
+ .name = "rk8xx-pwrkey",
+ .num_resources = ARRAY_SIZE(rk817_pwrkey_resources),
+ .resources = &rk817_pwrkey_resources[0],
+ },
+ {
+ .name = "rk808-rtc",
+ .num_resources = ARRAY_SIZE(rk817_rtc_resources),
+ .resources = &rk817_rtc_resources[0],
+ },
+};
+
static const struct mfd_cell rk818s[] = {
{ .name = "rk808-clkout", },
{ .name = "rk808-regulator", },
@@ -167,6 +221,13 @@ static const struct rk808_reg_data rk808_pre_init_reg[] = {
VB_LO_SEL_3500MV },
};

+static const struct rk808_reg_data rk817_pre_init_reg[] = {
+ {RK817_RTC_CTRL_REG, RTC_STOP, RTC_STOP},
+ {RK817_GPIO_INT_CFG, RK817_INT_POL_MSK, RK817_INT_POL_H},
+ {RK817_SYS_CFG(1), RK817_HOTDIE_TEMP_MSK | RK817_TSD_TEMP_MSK,
+ RK817_HOTDIE_105 | RK817_TSD_140},
+};
+
static const struct rk808_reg_data rk818_pre_init_reg[] = {
/* improve efficiency */
{ RK818_BUCK2_CONFIG_REG, BUCK2_RATE_MASK, BUCK_ILMIN_250MA },
@@ -332,6 +393,33 @@ static const struct regmap_irq rk818_irqs[] = {
},
};

+static const struct regmap_irq rk817_irqs[RK817_IRQ_END] = {
+ REGMAP_IRQ_REG_LINE(0, 8),
+ REGMAP_IRQ_REG_LINE(1, 8),
+ REGMAP_IRQ_REG_LINE(2, 8),
+ REGMAP_IRQ_REG_LINE(3, 8),
+ REGMAP_IRQ_REG_LINE(4, 8),
+ REGMAP_IRQ_REG_LINE(5, 8),
+ REGMAP_IRQ_REG_LINE(6, 8),
+ REGMAP_IRQ_REG_LINE(7, 8),
+ REGMAP_IRQ_REG_LINE(8, 8),
+ REGMAP_IRQ_REG_LINE(9, 8),
+ REGMAP_IRQ_REG_LINE(10, 8),
+ REGMAP_IRQ_REG_LINE(11, 8),
+ REGMAP_IRQ_REG_LINE(12, 8),
+ REGMAP_IRQ_REG_LINE(13, 8),
+ REGMAP_IRQ_REG_LINE(14, 8),
+ REGMAP_IRQ_REG_LINE(15, 8),
+ REGMAP_IRQ_REG_LINE(16, 8),
+ REGMAP_IRQ_REG_LINE(17, 8),
+ REGMAP_IRQ_REG_LINE(18, 8),
+ REGMAP_IRQ_REG_LINE(19, 8),
+ REGMAP_IRQ_REG_LINE(20, 8),
+ REGMAP_IRQ_REG_LINE(21, 8),
+ REGMAP_IRQ_REG_LINE(22, 8),
+ REGMAP_IRQ_REG_LINE(23, 8)
+};
+
static struct regmap_irq_chip rk805_irq_chip = {
.name = "rk805",
.irqs = rk805_irqs,
@@ -355,6 +443,18 @@ static const struct regmap_irq_chip rk808_irq_chip = {
.init_ack_masked = true,
};

+static struct regmap_irq_chip rk817_irq_chip = {
+ .name = "rk817",
+ .irqs = rk817_irqs,
+ .num_irqs = ARRAY_SIZE(rk817_irqs),
+ .num_regs = 3,
+ .irq_reg_stride = 2,
+ .status_base = RK817_INT_STS_REG0,
+ .mask_base = RK817_INT_STS_MSK_REG0,
+ .ack_base = RK817_INT_STS_REG0,
+ .init_ack_masked = true,
+};
+
static const struct regmap_irq_chip rk818_irq_chip = {
.name = "rk818",
.irqs = rk818_irqs,
@@ -423,9 +523,33 @@ static void rk818_device_shutdown(void)
dev_err(&rk808_i2c_client->dev, "power off error!\n");
}

+static void rk8xx_syscore_shutdown(void)
+{
+ struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
+ int ret;
+
+ if (system_state == SYSTEM_POWER_OFF &&
+ (rk808->variant == RK809_ID || rk808->variant == RK817_ID)) {
+ ret = regmap_update_bits(rk808->regmap,
+ RK817_SYS_CFG(3),
+ RK817_SLPPIN_FUNC_MSK,
+ SLPPIN_DN_FUN);
+ if (ret) {
+ dev_warn(&rk808_i2c_client->dev,
+ "Cannot switch to power down function\n");
+ }
+ }
+}
+
+static struct syscore_ops rk808_syscore_ops = {
+ .shutdown = rk8xx_syscore_shutdown,
+};
+
static const struct of_device_id rk808_of_match[] = {
{ .compatible = "rockchip,rk805" },
{ .compatible = "rockchip,rk808" },
+ { .compatible = "rockchip,rk809" },
+ { .compatible = "rockchip,rk817" },
{ .compatible = "rockchip,rk818" },
{ },
};
@@ -438,10 +562,11 @@ static int rk808_probe(struct i2c_client *client,
struct rk808 *rk808;
const struct rk808_reg_data *pre_init_reg;
const struct mfd_cell *cells;
- void (*pm_pwroff_fn)(void);
+ void (*pm_pwroff_fn)(void) = NULL;
int nr_pre_init_regs;
int nr_cells;
int pm_off = 0, msb, lsb;
+ unsigned char pmic_id_msb, pmic_id_lsb;
int ret;
int i;

@@ -449,15 +574,24 @@ static int rk808_probe(struct i2c_client *client,
if (!rk808)
return -ENOMEM;

+ if (of_device_is_compatible(np, "rockchip,rk817") ||
+ of_device_is_compatible(np, "rockchip,rk809")) {
+ pmic_id_msb = RK817_ID_MSB;
+ pmic_id_lsb = RK817_ID_LSB;
+ } else {
+ pmic_id_msb = RK808_ID_MSB;
+ pmic_id_lsb = RK808_ID_LSB;
+ }
+
/* Read chip variant */
- msb = i2c_smbus_read_byte_data(client, RK808_ID_MSB);
+ msb = i2c_smbus_read_byte_data(client, pmic_id_msb);
if (msb < 0) {
dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
RK808_ID_MSB);
return msb;
}

- lsb = i2c_smbus_read_byte_data(client, RK808_ID_LSB);
+ lsb = i2c_smbus_read_byte_data(client, pmic_id_lsb);
if (lsb < 0) {
dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
RK808_ID_LSB);
@@ -495,6 +629,16 @@ static int rk808_probe(struct i2c_client *client,
nr_cells = ARRAY_SIZE(rk818s);
pm_pwroff_fn = rk818_device_shutdown;
break;
+ case RK809_ID:
+ case RK817_ID:
+ rk808->regmap_cfg = &rk817_regmap_config;
+ rk808->regmap_irq_chip = &rk817_irq_chip;
+ pre_init_reg = rk817_pre_init_reg;
+ nr_pre_init_regs = ARRAY_SIZE(rk817_pre_init_reg);
+ cells = rk817s;
+ nr_cells = ARRAY_SIZE(rk817s);
+ register_syscore_ops(&rk808_syscore_ops);
+ break;
default:
dev_err(&client->dev, "Unsupported RK8XX ID %lu\n",
rk808->variant);
@@ -568,10 +712,52 @@ static int rk808_remove(struct i2c_client *client)
return 0;
}

+static int rk8xx_suspend(struct device *dev)
+{
+ struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
+ int ret = 0;
+
+ switch (rk808->variant) {
+ case RK809_ID:
+ case RK817_ID:
+ ret = regmap_update_bits(rk808->regmap,
+ RK817_SYS_CFG(3),
+ RK817_SLPPIN_FUNC_MSK,
+ SLPPIN_SLP_FUN);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static int rk8xx_resume(struct device *dev)
+{
+ struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
+ int ret = 0;
+
+ switch (rk808->variant) {
+ case RK809_ID:
+ case RK817_ID:
+ ret = regmap_update_bits(rk808->regmap,
+ RK817_SYS_CFG(3),
+ RK817_SLPPIN_FUNC_MSK,
+ SLPPIN_NULL_FUN);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+SIMPLE_DEV_PM_OPS(rk8xx_pm_ops, rk8xx_suspend, rk8xx_resume);
+
static struct i2c_driver rk808_i2c_driver = {
.driver = {
.name = "rk808",
.of_match_table = rk808_of_match,
+ .pm = &rk8xx_pm_ops,
},
.probe = rk808_probe,
.remove = rk808_remove,
diff --git a/include/linux/mfd/rk808.h b/include/linux/mfd/rk808.h
index d3156594674c..0fd9eedf3c20 100644
--- a/include/linux/mfd/rk808.h
+++ b/include/linux/mfd/rk808.h
@@ -382,6 +382,7 @@ enum rk805_reg {
#define SWITCH1_EN BIT(5)
#define DEV_OFF_RST BIT(3)
#define DEV_OFF BIT(0)
+#define RTC_STOP BIT(0)

#define VB_LO_ACT BIT(4)
#define VB_LO_SEL_3500MV (7 << 0)
@@ -396,6 +397,175 @@ enum rk805_reg {
#define SLEEP_FUN (0x1 << 2)
#define RK8XX_ID_MSK 0xfff0
#define FPWM_MODE BIT(7)
+enum rk817_reg_id {
+ RK817_ID_DCDC1 = 0,
+ RK817_ID_DCDC2,
+ RK817_ID_DCDC3,
+ RK817_ID_DCDC4,
+ RK817_ID_LDO1,
+ RK817_ID_LDO2,
+ RK817_ID_LDO3,
+ RK817_ID_LDO4,
+ RK817_ID_LDO5,
+ RK817_ID_LDO6,
+ RK817_ID_LDO7,
+ RK817_ID_LDO8,
+ RK817_ID_LDO9,
+ RK817_ID_BOOST,
+ RK817_ID_BOOST_OTG_SW,
+ RK817_NUM_REGULATORS
+};
+
+enum rk809_reg_id {
+ RK809_ID_DCDC5 = RK817_ID_BOOST,
+ RK809_ID_SW1,
+ RK809_ID_SW2,
+ RK809_NUM_REGULATORS
+};
+
+#define RK817_SECONDS_REG 0x00
+#define RK817_MINUTES_REG 0x01
+#define RK817_HOURS_REG 0x02
+#define RK817_DAYS_REG 0x03
+#define RK817_MONTHS_REG 0x04
+#define RK817_YEARS_REG 0x05
+#define RK817_WEEKS_REG 0x06
+#define RK817_ALARM_SECONDS_REG 0x07
+#define RK817_ALARM_MINUTES_REG 0x08
+#define RK817_ALARM_HOURS_REG 0x09
+#define RK817_ALARM_DAYS_REG 0x0a
+#define RK817_ALARM_MONTHS_REG 0x0b
+#define RK817_ALARM_YEARS_REG 0x0c
+#define RK817_RTC_CTRL_REG 0xd
+#define RK817_RTC_STATUS_REG 0xe
+#define RK817_RTC_INT_REG 0xf
+#define RK817_RTC_COMP_LSB_REG 0x10
+#define RK817_RTC_COMP_MSB_REG 0x11
+
+#define RK817_POWER_EN_REG(i) (0xb1 + (i))
+#define RK817_POWER_SLP_EN_REG(i) (0xb5 + (i))
+
+#define RK817_POWER_CONFIG (0xb9)
+
+#define RK817_BUCK_CONFIG_REG(i) (0xba + (i) * 3)
+
+#define RK817_BUCK1_ON_VSEL_REG 0xBB
+#define RK817_BUCK1_SLP_VSEL_REG 0xBC
+
+#define RK817_BUCK2_CONFIG_REG 0xBD
+#define RK817_BUCK2_ON_VSEL_REG 0xBE
+#define RK817_BUCK2_SLP_VSEL_REG 0xBF
+
+#define RK817_BUCK3_CONFIG_REG 0xC0
+#define RK817_BUCK3_ON_VSEL_REG 0xC1
+#define RK817_BUCK3_SLP_VSEL_REG 0xC2
+
+#define RK817_BUCK4_CONFIG_REG 0xC3
+#define RK817_BUCK4_ON_VSEL_REG 0xC4
+#define RK817_BUCK4_SLP_VSEL_REG 0xC5
+
+#define RK817_LDO_ON_VSEL_REG(idx) (0xcc + (idx) * 2)
+#define RK817_BOOST_OTG_CFG (0xde)
+
+#define RK817_ID_MSB 0xed
+#define RK817_ID_LSB 0xee
+
+#define RK817_SYS_STS 0xf0
+#define RK817_SYS_CFG(i) (0xf1 + (i))
+
+#define RK817_ON_SOURCE_REG 0xf5
+#define RK817_OFF_SOURCE_REG 0xf6
+
+/* INTERRUPT REGISTER */
+#define RK817_INT_STS_REG0 0xf8
+#define RK817_INT_STS_MSK_REG0 0xf9
+#define RK817_INT_STS_REG1 0xfa
+#define RK817_INT_STS_MSK_REG1 0xfb
+#define RK817_INT_STS_REG2 0xfc
+#define RK817_INT_STS_MSK_REG2 0xfd
+#define RK817_GPIO_INT_CFG 0xfe
+
+/* IRQ Definitions */
+#define RK817_IRQ_PWRON_FALL 0
+#define RK817_IRQ_PWRON_RISE 1
+#define RK817_IRQ_PWRON 2
+#define RK817_IRQ_PWMON_LP 3
+#define RK817_IRQ_HOTDIE 4
+#define RK817_IRQ_RTC_ALARM 5
+#define RK817_IRQ_RTC_PERIOD 6
+#define RK817_IRQ_VB_LO 7
+#define RK817_IRQ_PLUG_IN 8
+#define RK817_IRQ_PLUG_OUT 9
+#define RK817_IRQ_CHRG_TERM 10
+#define RK817_IRQ_CHRG_TIME 11
+#define RK817_IRQ_CHRG_TS 12
+#define RK817_IRQ_USB_OV 13
+#define RK817_IRQ_CHRG_IN_CLMP 14
+#define RK817_IRQ_BAT_DIS_ILIM 15
+#define RK817_IRQ_GATE_GPIO 16
+#define RK817_IRQ_TS_GPIO 17
+#define RK817_IRQ_CODEC_PD 18
+#define RK817_IRQ_CODEC_PO 19
+#define RK817_IRQ_CLASSD_MUTE_DONE 20
+#define RK817_IRQ_CLASSD_OCP 21
+#define RK817_IRQ_BAT_OVP 22
+#define RK817_IRQ_CHRG_BAT_HI 23
+#define RK817_IRQ_END (RK817_IRQ_CHRG_BAT_HI + 1)
+
+/*
+ * rtc_ctrl 0xd
+ * same as 808, except bit4
+ */
+#define RK817_RTC_CTRL_RSV4 BIT(4)
+
+/* power config 0xb9 */
+#define RK817_BUCK3_FB_RES_MSK BIT(6)
+#define RK817_BUCK3_FB_RES_INTER BIT(6)
+#define RK817_BUCK3_FB_RES_EXT 0
+
+/* buck config 0xba */
+#define RK817_RAMP_RATE_OFFSET 6
+#define RK817_RAMP_RATE_MASK (0x3 << RK817_RAMP_RATE_OFFSET)
+#define RK817_RAMP_RATE_3MV_PER_US (0x0 << RK817_RAMP_RATE_OFFSET)
+#define RK817_RAMP_RATE_6_3MV_PER_US (0x1 << RK817_RAMP_RATE_OFFSET)
+#define RK817_RAMP_RATE_12_5MV_PER_US (0x2 << RK817_RAMP_RATE_OFFSET)
+#define RK817_RAMP_RATE_25MV_PER_US (0x3 << RK817_RAMP_RATE_OFFSET)
+
+/* sys_cfg1 0xf2 */
+#define RK817_HOTDIE_TEMP_MSK (0x3 << 4)
+#define RK817_HOTDIE_85 (0x0 << 4)
+#define RK817_HOTDIE_95 (0x1 << 4)
+#define RK817_HOTDIE_105 (0x2 << 4)
+#define RK817_HOTDIE_115 (0x3 << 4)
+
+#define RK817_TSD_TEMP_MSK BIT(6)
+#define RK817_TSD_140 0
+#define RK817_TSD_160 BIT(6)
+
+#define RK817_CLK32KOUT2_EN BIT(7)
+
+/* sys_cfg3 0xf4 */
+#define RK817_SLPPIN_FUNC_MSK (0x3 << 3)
+#define SLPPIN_NULL_FUN (0x0 << 3)
+#define SLPPIN_SLP_FUN (0x1 << 3)
+#define SLPPIN_DN_FUN (0x2 << 3)
+#define SLPPIN_RST_FUN (0x3 << 3)
+
+#define RK817_RST_FUNC_MSK (0x3 << 6)
+#define RK817_RST_FUNC_SFT (6)
+#define RK817_RST_FUNC_CNT (3)
+#define RK817_RST_FUNC_DEV (0) /* reset the dev */
+#define RK817_RST_FUNC_REG (0x1 << 6) /* reset the reg only */
+
+#define RK817_SLPPOL_MSK BIT(5)
+#define RK817_SLPPOL_H BIT(5)
+#define RK817_SLPPOL_L (0)
+
+/* gpio&int 0xfe */
+#define RK817_INT_POL_MSK BIT(1)
+#define RK817_INT_POL_H BIT(1)
+#define RK817_INT_POL_L 0
+#define RK809_BUCK5_CONFIG(i) (RK817_BOOST_OTG_CFG + (i) * 1)

enum {
BUCK_ILMIN_50MA,
@@ -443,6 +613,8 @@ enum {
enum {
RK805_ID = 0x8050,
RK808_ID = 0x0000,
+ RK809_ID = 0x8090,
+ RK817_ID = 0x8170,
RK818_ID = 0x8181,
};

--
2.20.1
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