/* * MFD core driver for Rockchip RK808 * * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd * * Author: Chris Zhong * Author: Zhang Qing * * 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 #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 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 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_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 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 const 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 "); MODULE_AUTHOR("Zhang Qing "); MODULE_DESCRIPTION("RK808 PMIC driver");