On Fri, 24 Aug 2018, Tony Xie wrote:
> The rk809 and rk817 are a Power Management IC (PMIC) for multimedia
> and handheld devices. It 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 and regulators functionality.
>
> Signed-off-by: Tony Xie <tony.xie@xxxxxxxxxxxxxx>
> ---
> drivers/mfd/Kconfig | 6 +-
> drivers/mfd/rk808.c | 218 +++++++++++++++++++++++++++++++++++++++++++++-
> include/linux/mfd/rk808.h | 172 ++++++++++++++++++++++++++++++++++++
> kernel/reboot.c | 1 +
> 4 files changed, 391 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index b860eb5..84f2f22 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -967,14 +967,14 @@ 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, RK809 and RK817,
> + RK808 and RK818 Power Management chips.
Any reason why you've taken these out of order?
> 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 216fbf6..62e2fe1 100644
> --- a/drivers/mfd/rk808.c
> +++ b/drivers/mfd/rk808.c
> @@ -62,6 +62,29 @@ 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.
> + * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
> + * bits are cleared in case when we shutoff anyway, but better safe.
> + */
> +
> + 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 +109,14 @@ static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
> .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 +125,13 @@ static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
> }
> };
>
> +static struct resource rk817_rtc_resources[] = {
> + {
> + .start = RK817_IRQ_RTC_ALARM,
> + .end = RK817_IRQ_RTC_ALARM,
> + .flags = IORESOURCE_IRQ,
> + }
> +};
> static struct resource rk805_key_resources[] = {
> {
> .start = RK805_IRQ_PWRON_FALL,
> @@ -107,6 +145,19 @@ static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
> }
> };
>
> +static struct resource rk817_pwrkey_resources[] = {
> + {
> + .start = RK817_IRQ_PWRON_RISE,
> + .end = RK817_IRQ_PWRON_RISE,
> + .flags = IORESOURCE_IRQ,
> + },
> + {
> + .start = RK817_IRQ_PWRON_FALL,
> + .end = RK817_IRQ_PWRON_FALL,
> + .flags = IORESOURCE_IRQ,
> + },
> +};
> +
> static const struct mfd_cell rk805s[] = {
> { .name = "rk808-clkout", },
> { .name = "rk808-regulator", },
> @@ -132,6 +183,21 @@ static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
> },
> };
>
> +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 +233,13 @@ static bool rk808_is_volatile_reg(struct device *dev, unsigned int 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 +405,39 @@ static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
> },
> };
>
> +#define REGMAP_IRQ_M(_id) \
> + [_id] = { \
> + .mask = BIT(((_id) % 8)), \
> + .reg_offset = ((_id) / 8), \
> + }
If this is helpful for you, it will be helpful for others.
Please submit this to the Regmap subsystem.
See: include/linux/regmap.h
> +static const struct regmap_irq rk817_irqs[RK817_IRQ_END] = {
> + REGMAP_IRQ_M(0),
> + REGMAP_IRQ_M(1),
> + REGMAP_IRQ_M(2),
> + REGMAP_IRQ_M(3),
> + REGMAP_IRQ_M(4),
> + REGMAP_IRQ_M(5),
> + REGMAP_IRQ_M(6),
> + REGMAP_IRQ_M(7),
> + REGMAP_IRQ_M(8),
> + REGMAP_IRQ_M(9),
> + REGMAP_IRQ_M(10),
> + REGMAP_IRQ_M(11),
> + REGMAP_IRQ_M(12),
> + REGMAP_IRQ_M(13),
> + REGMAP_IRQ_M(14),
> + REGMAP_IRQ_M(15),
> + REGMAP_IRQ_M(16),
> + REGMAP_IRQ_M(17),
> + REGMAP_IRQ_M(18),
> + REGMAP_IRQ_M(19),
> + REGMAP_IRQ_M(20),
> + REGMAP_IRQ_M(21),
> + REGMAP_IRQ_M(22),
> + REGMAP_IRQ_M(23)
> +};
> +
> static struct regmap_irq_chip rk805_irq_chip = {
> .name = "rk805",
> .irqs = rk805_irqs,
> @@ -355,6 +461,18 @@ static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
> .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 +541,39 @@ static void rk818_device_shutdown(void)
> dev_err(&rk808_i2c_client->dev, "power off error!\n");
> }
>
> +static void rk8xx_device_shutdown_prepare(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");
This isn't a good warning to an end user.
Where is "here"?
Please provide something a little more forthcoming/descriptive.
> + return;
> + }
> +
> + switch (rk808->variant) {
> + case RK809_ID:
> + case 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,
> + "switch pin func to power down error!\n");
Again, what does this mean to an end user? Probably very little.
> + }
> + break;
> + default:
> + break;
> + }
> +}
> +
> 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 +586,11 @@ 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 = RK808_ID_MSB, pmic_id_lsb = RK808_ID_LSB;
Please place these on separate lines.
> int ret;
> int i;
>
> @@ -449,15 +598,20 @@ 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;
> + }
Rather than pre-assign default values at declaration, I think it would
be cleaner to have an else here.
> /* 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 +649,16 @@ 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);
> + pm_power_off_prepare = rk8xx_device_shutdown_prepare;
> + break;
> default:
> dev_err(&client->dev, "Unsupported RK8XX ID %lu\n",
> rk808->variant);
> @@ -568,9 +732,56 @@ static int rk808_remove(struct i2c_client *client)
> return 0;
> }
>
> +static int rk8xx_suspend(struct device *dev)
> +{
> + int ret = 0;
> + struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
> +
> + 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)
> +{
> + int ret = 0;
> + struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
> +
> + 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;
> +}
> +
> +static const struct dev_pm_ops rk8xx_pm_ops = {
> + .suspend = rk8xx_suspend,
> + .resume = rk8xx_resume,
> +};
Looks like you want SIMPLE_DEV_PM_OPS() here.
> static const struct i2c_device_id rk808_ids[] = {
> { "rk805" },
> { "rk808" },
> + { "rk809" },
> + { "rk817" },
> { "rk818" },
> { },
> };
I don't think this table is required anymore.
Try removing it.
> @@ -580,6 +791,7 @@ static int rk808_remove(struct i2c_client *client)
> .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 d315659..b973b0a 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 + 0)
> +#define RK817_IRQ_PLUG_OUT (8 + 1)
> +#define RK817_IRQ_CHRG_TERM (8 + 2)
> +#define RK817_IRQ_CHRG_TIME (8 + 3)
> +#define RK817_IRQ_CHRG_TS (8 + 4)
> +#define RK817_IRQ_USB_OV (8 + 5)
> +#define RK817_IRQ_CHRG_IN_CLMP (8 + 6)
> +#define RK817_IRQ_BAT_DIS_ILIM (8 + 7)
> +#define RK817_IRQ_GATE_GPIO (16 + 0)
> +#define RK817_IRQ_TS_GPIO (16 + 1)
> +#define RK817_IRQ_CODEC_PD (16 + 2)
> +#define RK817_IRQ_CODEC_PO (16 + 3)
> +#define RK817_IRQ_CLASSD_MUTE_DONE (16 + 4)
> +#define RK817_IRQ_CLASSD_OCP (16 + 5)
> +#define RK817_IRQ_BAT_OVP (16 + 6)
> +#define RK817_IRQ_CHRG_BAT_HI (16 + 7)
> +#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,
> };
>
> diff --git a/kernel/reboot.c b/kernel/reboot.c
> index e4ced88..83810d7 100644
> --- a/kernel/reboot.c
> +++ b/kernel/reboot.c
> @@ -49,6 +49,7 @@
> */
>
> void (*pm_power_off_prepare)(void);
> +EXPORT_SYMBOL_GPL(pm_power_off_prepare);
Why do you need this where no other driver in the kernel does?
> /**
> * emergency_restart - reboot the system
--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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