// SPDX-License-Identifier: GPL-2.0-only /* * MFD core driver for Rockchip RK808/RK818 * * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd * * Author: Chris Zhong * Author: Zhang Qing * * Copyright (C) 2016 PHYTEC Messtechnik GmbH * * Author: Wadim Egorov */ #include #include #include #include #include #include #include #include struct rk808_reg_data { int addr; int mask; int value; }; static bool rk808_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 RK808_SECONDS_REG ... RK808_WEEKS_REG: case RK808_RTC_STATUS_REG: case RK808_VB_MON_REG: case RK808_THERMAL_REG: case RK808_DCDC_UV_STS_REG: case RK808_LDO_UV_STS_REG: case RK808_DCDC_PG_REG: case RK808_LDO_PG_REG: case RK808_DEVCTRL_REG: case RK808_INT_STS_REG1: case RK808_INT_STS_REG2: return true; } 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, .max_register = RK818_USB_CTRL_REG, .cache_type = REGCACHE_RBTREE, .volatile_reg = rk808_is_volatile_reg, }; static const struct regmap_config rk805_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = RK805_OFF_SOURCE_REG, .cache_type = REGCACHE_RBTREE, .volatile_reg = rk808_is_volatile_reg, }; static const struct regmap_config rk808_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = RK808_IO_POL_REG, .cache_type = REGCACHE_RBTREE, .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[] = { DEFINE_RES_IRQ(RK808_IRQ_RTC_ALARM), }; static struct resource rk817_rtc_resources[] = { DEFINE_RES_IRQ(RK817_IRQ_RTC_ALARM), }; static struct resource rk805_key_resources[] = { DEFINE_RES_IRQ(RK805_IRQ_PWRON_RISE), DEFINE_RES_IRQ(RK805_IRQ_PWRON_FALL), }; 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", }, { .name = "rk805-pinctrl", }, { .name = "rk808-rtc", .num_resources = ARRAY_SIZE(rtc_resources), .resources = &rtc_resources[0], }, { .name = "rk805-pwrkey", .num_resources = ARRAY_SIZE(rk805_key_resources), .resources = &rk805_key_resources[0], }, }; static const struct mfd_cell rk808s[] = { { .name = "rk808-clkout", }, { .name = "rk808-regulator", }, { .name = "rk808-rtc", .num_resources = ARRAY_SIZE(rtc_resources), .resources = rtc_resources, }, }; static const struct mfd_cell rk817s[] = { { .name = "rk808-clkout",}, { .name = "rk808-regulator",}, { .name = "rk805-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", }, { .name = "rk808-rtc", .num_resources = ARRAY_SIZE(rtc_resources), .resources = rtc_resources, }, }; static const struct rk808_reg_data rk805_pre_init_reg[] = { {RK805_BUCK1_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK, RK805_BUCK1_2_ILMAX_4000MA}, {RK805_BUCK2_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK, RK805_BUCK1_2_ILMAX_4000MA}, {RK805_BUCK3_CONFIG_REG, RK805_BUCK3_4_ILMAX_MASK, RK805_BUCK3_ILMAX_3000MA}, {RK805_BUCK4_CONFIG_REG, RK805_BUCK3_4_ILMAX_MASK, RK805_BUCK4_ILMAX_3500MA}, {RK805_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_400MA}, {RK805_GPIO_IO_POL_REG, SLP_SD_MSK, SLEEP_FUN}, {RK805_THERMAL_REG, TEMP_HOTDIE_MSK, TEMP115C}, }; static const struct rk808_reg_data rk808_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_DCDC_UV_ACT_REG, BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE}, { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT | 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_L}, {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 }, { RK818_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_250MA }, { RK818_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA }, { RK818_USB_CTRL_REG, RK818_USB_ILIM_SEL_MASK, RK818_USB_ILMIN_2000MA }, /* close charger when usb lower then 3.4V */ { RK818_USB_CTRL_REG, RK818_USB_CHG_SD_VSEL_MASK, (0x7 << 4) }, /* no action when vref */ { RK818_H5V_EN_REG, BIT(1), RK818_REF_RDY_CTRL }, /* enable HDMI 5V */ { RK818_H5V_EN_REG, BIT(0), RK818_H5V_EN }, { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT | VB_LO_SEL_3500MV }, }; static const struct regmap_irq rk805_irqs[] = { [RK805_IRQ_PWRON_RISE] = { .mask = RK805_IRQ_PWRON_RISE_MSK, .reg_offset = 0, }, [RK805_IRQ_VB_LOW] = { .mask = RK805_IRQ_VB_LOW_MSK, .reg_offset = 0, }, [RK805_IRQ_PWRON] = { .mask = RK805_IRQ_PWRON_MSK, .reg_offset = 0, }, [RK805_IRQ_PWRON_LP] = { .mask = RK805_IRQ_PWRON_LP_MSK, .reg_offset = 0, }, [RK805_IRQ_HOTDIE] = { .mask = RK805_IRQ_HOTDIE_MSK, .reg_offset = 0, }, [RK805_IRQ_RTC_ALARM] = { .mask = RK805_IRQ_RTC_ALARM_MSK, .reg_offset = 0, }, [RK805_IRQ_RTC_PERIOD] = { .mask = RK805_IRQ_RTC_PERIOD_MSK, .reg_offset = 0, }, [RK805_IRQ_PWRON_FALL] = { .mask = RK805_IRQ_PWRON_FALL_MSK, .reg_offset = 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 const struct regmap_irq rk818_irqs[] = { /* INT_STS */ [RK818_IRQ_VOUT_LO] = { .mask = RK818_IRQ_VOUT_LO_MSK, .reg_offset = 0, }, [RK818_IRQ_VB_LO] = { .mask = RK818_IRQ_VB_LO_MSK, .reg_offset = 0, }, [RK818_IRQ_PWRON] = { .mask = RK818_IRQ_PWRON_MSK, .reg_offset = 0, }, [RK818_IRQ_PWRON_LP] = { .mask = RK818_IRQ_PWRON_LP_MSK, .reg_offset = 0, }, [RK818_IRQ_HOTDIE] = { .mask = RK818_IRQ_HOTDIE_MSK, .reg_offset = 0, }, [RK818_IRQ_RTC_ALARM] = { .mask = RK818_IRQ_RTC_ALARM_MSK, .reg_offset = 0, }, [RK818_IRQ_RTC_PERIOD] = { .mask = RK818_IRQ_RTC_PERIOD_MSK, .reg_offset = 0, }, [RK818_IRQ_USB_OV] = { .mask = RK818_IRQ_USB_OV_MSK, .reg_offset = 0, }, /* INT_STS2 */ [RK818_IRQ_PLUG_IN] = { .mask = RK818_IRQ_PLUG_IN_MSK, .reg_offset = 1, }, [RK818_IRQ_PLUG_OUT] = { .mask = RK818_IRQ_PLUG_OUT_MSK, .reg_offset = 1, }, [RK818_IRQ_CHG_OK] = { .mask = RK818_IRQ_CHG_OK_MSK, .reg_offset = 1, }, [RK818_IRQ_CHG_TE] = { .mask = RK818_IRQ_CHG_TE_MSK, .reg_offset = 1, }, [RK818_IRQ_CHG_TS1] = { .mask = RK818_IRQ_CHG_TS1_MSK, .reg_offset = 1, }, [RK818_IRQ_TS2] = { .mask = RK818_IRQ_TS2_MSK, .reg_offset = 1, }, [RK818_IRQ_CHG_CVTLIM] = { .mask = RK818_IRQ_CHG_CVTLIM_MSK, .reg_offset = 1, }, [RK818_IRQ_DISCHG_ILIM] = { .mask = RK818_IRQ_DISCHG_ILIM_MSK, .reg_offset = 1, }, }; 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, .num_irqs = ARRAY_SIZE(rk805_irqs), .num_regs = 1, .status_base = RK805_INT_STS_REG, .mask_base = RK805_INT_STS_MSK_REG, .ack_base = RK805_INT_STS_REG, .init_ack_masked = true, }; static const 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 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, .num_irqs = ARRAY_SIZE(rk818_irqs), .num_regs = 2, .irq_reg_stride = 2, .status_base = RK818_INT_STS_REG1, .mask_base = RK818_INT_STS_MSK_REG1, .ack_base = RK818_INT_STS_REG1, .init_ack_masked = true, }; static struct i2c_client *rk808_i2c_client; static void rk805_device_shutdown(void) { int ret; struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client); if (!rk808) return; ret = regmap_update_bits(rk808->regmap, RK805_DEV_CTRL_REG, DEV_OFF, DEV_OFF); if (ret) dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n"); } static void rk805_device_shutdown_prepare(void) { int ret; struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client); if (!rk808) return; ret = regmap_update_bits(rk808->regmap, RK805_GPIO_IO_POL_REG, SLP_SD_MSK, SHUTDOWN_FUN); if (ret) dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n"); } static void rk808_device_shutdown(void) { int ret; struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client); if (!rk808) return; ret = regmap_update_bits(rk808->regmap, RK808_DEVCTRL_REG, DEV_OFF_RST, DEV_OFF_RST); if (ret) dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n"); } static void rk818_device_shutdown(void) { int ret; struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client); if (!rk808) return; ret = regmap_update_bits(rk808->regmap, RK818_DEVCTRL_REG, DEV_OFF, DEV_OFF); if (ret) dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\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" }, { }, }; MODULE_DEVICE_TABLE(of, rk808_of_match); 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; const struct rk808_reg_data *pre_init_reg; const struct mfd_cell *cells; 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; rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL); 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, 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, pmic_id_lsb); if (lsb < 0) { dev_err(&client->dev, "failed to read the chip id at 0x%x\n", RK808_ID_LSB); return lsb; } rk808->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK; dev_info(&client->dev, "chip id: 0x%x\n", (unsigned int)rk808->variant); switch (rk808->variant) { case RK805_ID: rk808->regmap_cfg = &rk805_regmap_config; rk808->regmap_irq_chip = &rk805_irq_chip; pre_init_reg = rk805_pre_init_reg; nr_pre_init_regs = ARRAY_SIZE(rk805_pre_init_reg); cells = rk805s; nr_cells = ARRAY_SIZE(rk805s); rk808->pm_pwroff_fn = rk805_device_shutdown; rk808->pm_pwroff_prep_fn = rk805_device_shutdown_prepare; break; case RK808_ID: rk808->regmap_cfg = &rk808_regmap_config; rk808->regmap_irq_chip = &rk808_irq_chip; pre_init_reg = rk808_pre_init_reg; nr_pre_init_regs = ARRAY_SIZE(rk808_pre_init_reg); cells = rk808s; nr_cells = ARRAY_SIZE(rk808s); rk808->pm_pwroff_fn = rk808_device_shutdown; break; case RK818_ID: rk808->regmap_cfg = &rk818_regmap_config; rk808->regmap_irq_chip = &rk818_irq_chip; pre_init_reg = rk818_pre_init_reg; nr_pre_init_regs = ARRAY_SIZE(rk818_pre_init_reg); cells = rk818s; nr_cells = ARRAY_SIZE(rk818s); rk808->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); return -EINVAL; } rk808->i2c = client; i2c_set_clientdata(client, rk808); rk808->regmap = devm_regmap_init_i2c(client, rk808->regmap_cfg); if (IS_ERR(rk808->regmap)) { dev_err(&client->dev, "regmap initialization failed\n"); return PTR_ERR(rk808->regmap); } 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->regmap_irq_chip, &rk808->irq_data); if (ret) { dev_err(&client->dev, "Failed to add irq_chip %d\n", ret); return ret; } for (i = 0; i < nr_pre_init_regs; 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 = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_NONE, cells, nr_cells, 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->pm_pwroff_fn; } if (pm_off && !pm_power_off_prepare) { if (!rk808_i2c_client) rk808_i2c_client = client; pm_power_off_prepare = rk808->pm_pwroff_prep_fn; } 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); /** * pm_power_off may points to a function from another module. * Check if the pointer is set by us and only then overwrite it. */ if (rk808->pm_pwroff_fn && pm_power_off == rk808->pm_pwroff_fn) pm_power_off = NULL; /** * As above, check if the pointer is set by us before overwrite. */ if (rk808->pm_pwroff_prep_fn && pm_power_off_prepare == rk808->pm_pwroff_prep_fn) pm_power_off_prepare = NULL; return 0; } static int __maybe_unused 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 __maybe_unused 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; } static 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, }; module_i2c_driver(rk808_i2c_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Chris Zhong "); MODULE_AUTHOR("Zhang Qing "); MODULE_AUTHOR("Wadim Egorov "); MODULE_DESCRIPTION("RK808/RK818 PMIC driver");