Chris Zhong | f69a7cf | 2014-09-03 21:51:44 +0800 | [diff] [blame] | 1 | /* |
| 2 | * MFD core driver for Rockchip RK808 |
| 3 | * |
| 4 | * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd |
| 5 | * |
| 6 | * Author: Chris Zhong <zyw@rock-chips.com> |
| 7 | * Author: Zhang Qing <zhangqing@rock-chips.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms and conditions of the GNU General Public License, |
| 11 | * version 2, as published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 16 | * more details. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/i2c.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/mfd/rk808.h> |
| 22 | #include <linux/mfd/core.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/regmap.h> |
| 25 | |
| 26 | struct rk808_reg_data { |
| 27 | int addr; |
| 28 | int mask; |
| 29 | int value; |
| 30 | }; |
| 31 | |
Doug Anderson | 2adb3b8 | 2014-09-09 16:06:04 -0700 | [diff] [blame] | 32 | static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg) |
| 33 | { |
| 34 | /* |
| 35 | * Notes: |
| 36 | * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but |
| 37 | * we don't use that feature. It's better to cache. |
| 38 | * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since |
| 39 | * bits are cleared in case when we shutoff anyway, but better safe. |
| 40 | */ |
| 41 | |
| 42 | switch (reg) { |
| 43 | case RK808_SECONDS_REG ... RK808_WEEKS_REG: |
| 44 | case RK808_RTC_STATUS_REG: |
| 45 | case RK808_VB_MON_REG: |
| 46 | case RK808_THERMAL_REG: |
| 47 | case RK808_DCDC_UV_STS_REG: |
| 48 | case RK808_LDO_UV_STS_REG: |
| 49 | case RK808_DCDC_PG_REG: |
| 50 | case RK808_LDO_PG_REG: |
| 51 | case RK808_DEVCTRL_REG: |
| 52 | case RK808_INT_STS_REG1: |
| 53 | case RK808_INT_STS_REG2: |
| 54 | return true; |
| 55 | } |
| 56 | |
| 57 | return false; |
| 58 | } |
| 59 | |
Chris Zhong | f69a7cf | 2014-09-03 21:51:44 +0800 | [diff] [blame] | 60 | static const struct regmap_config rk808_regmap_config = { |
| 61 | .reg_bits = 8, |
| 62 | .val_bits = 8, |
| 63 | .max_register = RK808_IO_POL_REG, |
Doug Anderson | 2adb3b8 | 2014-09-09 16:06:04 -0700 | [diff] [blame] | 64 | .cache_type = REGCACHE_RBTREE, |
| 65 | .volatile_reg = rk808_is_volatile_reg, |
Chris Zhong | f69a7cf | 2014-09-03 21:51:44 +0800 | [diff] [blame] | 66 | }; |
| 67 | |
| 68 | static struct resource rtc_resources[] = { |
| 69 | { |
| 70 | .start = RK808_IRQ_RTC_ALARM, |
| 71 | .end = RK808_IRQ_RTC_ALARM, |
| 72 | .flags = IORESOURCE_IRQ, |
| 73 | } |
| 74 | }; |
| 75 | |
| 76 | static const struct mfd_cell rk808s[] = { |
| 77 | { .name = "rk808-clkout", }, |
| 78 | { .name = "rk808-regulator", }, |
| 79 | { |
| 80 | .name = "rk808-rtc", |
| 81 | .num_resources = ARRAY_SIZE(rtc_resources), |
| 82 | .resources = &rtc_resources[0], |
| 83 | }, |
| 84 | }; |
| 85 | |
| 86 | static const struct rk808_reg_data pre_init_reg[] = { |
| 87 | { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_150MA }, |
| 88 | { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_200MA }, |
| 89 | { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA }, |
| 90 | { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK, BUCK_ILMIN_200MA }, |
| 91 | { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK, BUCK_ILMIN_200MA }, |
Chris Zhong | e19f742 | 2015-02-28 18:09:06 +0800 | [diff] [blame] | 92 | { RK808_DCDC_UV_ACT_REG, BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE}, |
Chris Zhong | f69a7cf | 2014-09-03 21:51:44 +0800 | [diff] [blame] | 93 | { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT | |
| 94 | VB_LO_SEL_3500MV }, |
| 95 | }; |
| 96 | |
| 97 | static const struct regmap_irq rk808_irqs[] = { |
| 98 | /* INT_STS */ |
| 99 | [RK808_IRQ_VOUT_LO] = { |
| 100 | .mask = RK808_IRQ_VOUT_LO_MSK, |
| 101 | .reg_offset = 0, |
| 102 | }, |
| 103 | [RK808_IRQ_VB_LO] = { |
| 104 | .mask = RK808_IRQ_VB_LO_MSK, |
| 105 | .reg_offset = 0, |
| 106 | }, |
| 107 | [RK808_IRQ_PWRON] = { |
| 108 | .mask = RK808_IRQ_PWRON_MSK, |
| 109 | .reg_offset = 0, |
| 110 | }, |
| 111 | [RK808_IRQ_PWRON_LP] = { |
| 112 | .mask = RK808_IRQ_PWRON_LP_MSK, |
| 113 | .reg_offset = 0, |
| 114 | }, |
| 115 | [RK808_IRQ_HOTDIE] = { |
| 116 | .mask = RK808_IRQ_HOTDIE_MSK, |
| 117 | .reg_offset = 0, |
| 118 | }, |
| 119 | [RK808_IRQ_RTC_ALARM] = { |
| 120 | .mask = RK808_IRQ_RTC_ALARM_MSK, |
| 121 | .reg_offset = 0, |
| 122 | }, |
| 123 | [RK808_IRQ_RTC_PERIOD] = { |
| 124 | .mask = RK808_IRQ_RTC_PERIOD_MSK, |
| 125 | .reg_offset = 0, |
| 126 | }, |
| 127 | |
| 128 | /* INT_STS2 */ |
| 129 | [RK808_IRQ_PLUG_IN_INT] = { |
| 130 | .mask = RK808_IRQ_PLUG_IN_INT_MSK, |
| 131 | .reg_offset = 1, |
| 132 | }, |
| 133 | [RK808_IRQ_PLUG_OUT_INT] = { |
| 134 | .mask = RK808_IRQ_PLUG_OUT_INT_MSK, |
| 135 | .reg_offset = 1, |
| 136 | }, |
| 137 | }; |
| 138 | |
| 139 | static struct regmap_irq_chip rk808_irq_chip = { |
| 140 | .name = "rk808", |
| 141 | .irqs = rk808_irqs, |
| 142 | .num_irqs = ARRAY_SIZE(rk808_irqs), |
| 143 | .num_regs = 2, |
| 144 | .irq_reg_stride = 2, |
| 145 | .status_base = RK808_INT_STS_REG1, |
| 146 | .mask_base = RK808_INT_STS_MSK_REG1, |
| 147 | .ack_base = RK808_INT_STS_REG1, |
| 148 | .init_ack_masked = true, |
| 149 | }; |
| 150 | |
| 151 | static struct i2c_client *rk808_i2c_client; |
| 152 | static void rk808_device_shutdown(void) |
| 153 | { |
| 154 | int ret; |
| 155 | struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client); |
| 156 | |
| 157 | if (!rk808) { |
| 158 | dev_warn(&rk808_i2c_client->dev, |
| 159 | "have no rk808, so do nothing here\n"); |
| 160 | return; |
| 161 | } |
| 162 | |
| 163 | ret = regmap_update_bits(rk808->regmap, |
| 164 | RK808_DEVCTRL_REG, |
| 165 | DEV_OFF_RST, DEV_OFF_RST); |
| 166 | if (ret) |
| 167 | dev_err(&rk808_i2c_client->dev, "power off error!\n"); |
| 168 | } |
| 169 | |
| 170 | static int rk808_probe(struct i2c_client *client, |
| 171 | const struct i2c_device_id *id) |
| 172 | { |
| 173 | struct device_node *np = client->dev.of_node; |
| 174 | struct rk808 *rk808; |
| 175 | int pm_off = 0; |
| 176 | int ret; |
| 177 | int i; |
| 178 | |
| 179 | if (!client->irq) { |
| 180 | dev_err(&client->dev, "No interrupt support, no core IRQ\n"); |
| 181 | return -EINVAL; |
| 182 | } |
| 183 | |
| 184 | rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL); |
| 185 | if (!rk808) |
| 186 | return -ENOMEM; |
| 187 | |
| 188 | rk808->regmap = devm_regmap_init_i2c(client, &rk808_regmap_config); |
| 189 | if (IS_ERR(rk808->regmap)) { |
| 190 | dev_err(&client->dev, "regmap initialization failed\n"); |
| 191 | return PTR_ERR(rk808->regmap); |
| 192 | } |
| 193 | |
| 194 | for (i = 0; i < ARRAY_SIZE(pre_init_reg); i++) { |
| 195 | ret = regmap_update_bits(rk808->regmap, pre_init_reg[i].addr, |
| 196 | pre_init_reg[i].mask, |
| 197 | pre_init_reg[i].value); |
| 198 | if (ret) { |
| 199 | dev_err(&client->dev, |
| 200 | "0x%x write err\n", pre_init_reg[i].addr); |
| 201 | return ret; |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | ret = regmap_add_irq_chip(rk808->regmap, client->irq, |
| 206 | IRQF_ONESHOT, -1, |
| 207 | &rk808_irq_chip, &rk808->irq_data); |
| 208 | if (ret) { |
| 209 | dev_err(&client->dev, "Failed to add irq_chip %d\n", ret); |
| 210 | return ret; |
| 211 | } |
| 212 | |
| 213 | rk808->i2c = client; |
| 214 | i2c_set_clientdata(client, rk808); |
| 215 | |
Laxman Dewangan | d562316 | 2016-04-08 00:13:06 +0530 | [diff] [blame] | 216 | ret = devm_mfd_add_devices(&client->dev, -1, |
| 217 | rk808s, ARRAY_SIZE(rk808s), NULL, 0, |
| 218 | regmap_irq_get_domain(rk808->irq_data)); |
Chris Zhong | f69a7cf | 2014-09-03 21:51:44 +0800 | [diff] [blame] | 219 | if (ret) { |
| 220 | dev_err(&client->dev, "failed to add MFD devices %d\n", ret); |
| 221 | goto err_irq; |
| 222 | } |
| 223 | |
| 224 | pm_off = of_property_read_bool(np, |
| 225 | "rockchip,system-power-controller"); |
| 226 | if (pm_off && !pm_power_off) { |
| 227 | rk808_i2c_client = client; |
| 228 | pm_power_off = rk808_device_shutdown; |
| 229 | } |
| 230 | |
| 231 | return 0; |
| 232 | |
| 233 | err_irq: |
| 234 | regmap_del_irq_chip(client->irq, rk808->irq_data); |
| 235 | return ret; |
| 236 | } |
| 237 | |
| 238 | static int rk808_remove(struct i2c_client *client) |
| 239 | { |
| 240 | struct rk808 *rk808 = i2c_get_clientdata(client); |
| 241 | |
| 242 | regmap_del_irq_chip(client->irq, rk808->irq_data); |
Chris Zhong | f69a7cf | 2014-09-03 21:51:44 +0800 | [diff] [blame] | 243 | pm_power_off = NULL; |
| 244 | |
| 245 | return 0; |
| 246 | } |
| 247 | |
Fabian Frederick | 908725d | 2015-03-16 20:21:36 +0100 | [diff] [blame] | 248 | static const struct of_device_id rk808_of_match[] = { |
Chris Zhong | f69a7cf | 2014-09-03 21:51:44 +0800 | [diff] [blame] | 249 | { .compatible = "rockchip,rk808" }, |
| 250 | { }, |
| 251 | }; |
| 252 | MODULE_DEVICE_TABLE(of, rk808_of_match); |
| 253 | |
| 254 | static const struct i2c_device_id rk808_ids[] = { |
| 255 | { "rk808" }, |
| 256 | { }, |
| 257 | }; |
| 258 | MODULE_DEVICE_TABLE(i2c, rk808_ids); |
| 259 | |
| 260 | static struct i2c_driver rk808_i2c_driver = { |
| 261 | .driver = { |
| 262 | .name = "rk808", |
| 263 | .of_match_table = rk808_of_match, |
| 264 | }, |
| 265 | .probe = rk808_probe, |
| 266 | .remove = rk808_remove, |
| 267 | .id_table = rk808_ids, |
| 268 | }; |
| 269 | |
| 270 | module_i2c_driver(rk808_i2c_driver); |
| 271 | |
| 272 | MODULE_LICENSE("GPL"); |
| 273 | MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); |
| 274 | MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>"); |
| 275 | MODULE_DESCRIPTION("RK808 PMIC driver"); |