Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Copyright (C) STMicroelectronics 2018 |
| 3 | // Author: Pascal Paillet <p.paillet@st.com> |
| 4 | |
| 5 | #include <linux/i2c.h> |
| 6 | #include <linux/interrupt.h> |
| 7 | #include <linux/mfd/core.h> |
| 8 | #include <linux/mfd/stpmic1.h> |
| 9 | #include <linux/module.h> |
Sean Nyekjaer | 6e9df38 | 2023-06-02 08:24:26 +0200 | [diff] [blame] | 10 | #include <linux/reboot.h> |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 11 | #include <linux/of.h> |
| 12 | #include <linux/of_irq.h> |
| 13 | #include <linux/of_platform.h> |
| 14 | #include <linux/pm_wakeirq.h> |
| 15 | #include <linux/regmap.h> |
| 16 | |
| 17 | #include <dt-bindings/mfd/st,stpmic1.h> |
| 18 | |
| 19 | #define STPMIC1_MAIN_IRQ 0 |
| 20 | |
| 21 | static const struct regmap_range stpmic1_readable_ranges[] = { |
| 22 | regmap_reg_range(TURN_ON_SR, VERSION_SR), |
Sean Nyekjaer | 48b4371 | 2023-06-02 08:24:25 +0200 | [diff] [blame] | 23 | regmap_reg_range(MAIN_CR, LDO6_STDBY_CR), |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 24 | regmap_reg_range(BST_SW_CR, BST_SW_CR), |
| 25 | regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4), |
| 26 | regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4), |
| 27 | regmap_reg_range(INT_MASK_R1, INT_MASK_R4), |
| 28 | regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4), |
| 29 | regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4), |
| 30 | regmap_reg_range(INT_SRC_R1, INT_SRC_R1), |
| 31 | }; |
| 32 | |
| 33 | static const struct regmap_range stpmic1_writeable_ranges[] = { |
Sean Nyekjaer | 48b4371 | 2023-06-02 08:24:25 +0200 | [diff] [blame] | 34 | regmap_reg_range(MAIN_CR, LDO6_STDBY_CR), |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 35 | regmap_reg_range(BST_SW_CR, BST_SW_CR), |
| 36 | regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4), |
| 37 | regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4), |
| 38 | regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4), |
| 39 | }; |
| 40 | |
| 41 | static const struct regmap_range stpmic1_volatile_ranges[] = { |
| 42 | regmap_reg_range(TURN_ON_SR, VERSION_SR), |
| 43 | regmap_reg_range(WCHDG_CR, WCHDG_CR), |
| 44 | regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4), |
| 45 | regmap_reg_range(INT_SRC_R1, INT_SRC_R4), |
| 46 | }; |
| 47 | |
| 48 | static const struct regmap_access_table stpmic1_readable_table = { |
| 49 | .yes_ranges = stpmic1_readable_ranges, |
| 50 | .n_yes_ranges = ARRAY_SIZE(stpmic1_readable_ranges), |
| 51 | }; |
| 52 | |
| 53 | static const struct regmap_access_table stpmic1_writeable_table = { |
| 54 | .yes_ranges = stpmic1_writeable_ranges, |
| 55 | .n_yes_ranges = ARRAY_SIZE(stpmic1_writeable_ranges), |
| 56 | }; |
| 57 | |
| 58 | static const struct regmap_access_table stpmic1_volatile_table = { |
| 59 | .yes_ranges = stpmic1_volatile_ranges, |
| 60 | .n_yes_ranges = ARRAY_SIZE(stpmic1_volatile_ranges), |
| 61 | }; |
| 62 | |
YueHaibing | 0c09e71 | 2020-04-10 19:55:14 +0800 | [diff] [blame] | 63 | static const struct regmap_config stpmic1_regmap_config = { |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 64 | .reg_bits = 8, |
| 65 | .val_bits = 8, |
Bo Liu | 12edc9a | 2024-02-06 02:13:13 -0500 | [diff] [blame] | 66 | .cache_type = REGCACHE_MAPLE, |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 67 | .max_register = PMIC_MAX_REGISTER_ADDRESS, |
| 68 | .rd_table = &stpmic1_readable_table, |
| 69 | .wr_table = &stpmic1_writeable_table, |
| 70 | .volatile_table = &stpmic1_volatile_table, |
| 71 | }; |
| 72 | |
| 73 | static const struct regmap_irq stpmic1_irqs[] = { |
| 74 | REGMAP_IRQ_REG(IT_PONKEY_F, 0, 0x01), |
| 75 | REGMAP_IRQ_REG(IT_PONKEY_R, 0, 0x02), |
| 76 | REGMAP_IRQ_REG(IT_WAKEUP_F, 0, 0x04), |
| 77 | REGMAP_IRQ_REG(IT_WAKEUP_R, 0, 0x08), |
| 78 | REGMAP_IRQ_REG(IT_VBUS_OTG_F, 0, 0x10), |
| 79 | REGMAP_IRQ_REG(IT_VBUS_OTG_R, 0, 0x20), |
| 80 | REGMAP_IRQ_REG(IT_SWOUT_F, 0, 0x40), |
| 81 | REGMAP_IRQ_REG(IT_SWOUT_R, 0, 0x80), |
| 82 | |
| 83 | REGMAP_IRQ_REG(IT_CURLIM_BUCK1, 1, 0x01), |
| 84 | REGMAP_IRQ_REG(IT_CURLIM_BUCK2, 1, 0x02), |
| 85 | REGMAP_IRQ_REG(IT_CURLIM_BUCK3, 1, 0x04), |
| 86 | REGMAP_IRQ_REG(IT_CURLIM_BUCK4, 1, 0x08), |
| 87 | REGMAP_IRQ_REG(IT_OCP_OTG, 1, 0x10), |
| 88 | REGMAP_IRQ_REG(IT_OCP_SWOUT, 1, 0x20), |
| 89 | REGMAP_IRQ_REG(IT_OCP_BOOST, 1, 0x40), |
| 90 | REGMAP_IRQ_REG(IT_OVP_BOOST, 1, 0x80), |
| 91 | |
| 92 | REGMAP_IRQ_REG(IT_CURLIM_LDO1, 2, 0x01), |
| 93 | REGMAP_IRQ_REG(IT_CURLIM_LDO2, 2, 0x02), |
| 94 | REGMAP_IRQ_REG(IT_CURLIM_LDO3, 2, 0x04), |
| 95 | REGMAP_IRQ_REG(IT_CURLIM_LDO4, 2, 0x08), |
| 96 | REGMAP_IRQ_REG(IT_CURLIM_LDO5, 2, 0x10), |
| 97 | REGMAP_IRQ_REG(IT_CURLIM_LDO6, 2, 0x20), |
| 98 | REGMAP_IRQ_REG(IT_SHORT_SWOTG, 2, 0x40), |
| 99 | REGMAP_IRQ_REG(IT_SHORT_SWOUT, 2, 0x80), |
| 100 | |
| 101 | REGMAP_IRQ_REG(IT_TWARN_F, 3, 0x01), |
| 102 | REGMAP_IRQ_REG(IT_TWARN_R, 3, 0x02), |
| 103 | REGMAP_IRQ_REG(IT_VINLOW_F, 3, 0x04), |
| 104 | REGMAP_IRQ_REG(IT_VINLOW_R, 3, 0x08), |
| 105 | REGMAP_IRQ_REG(IT_SWIN_F, 3, 0x40), |
| 106 | REGMAP_IRQ_REG(IT_SWIN_R, 3, 0x80), |
| 107 | }; |
| 108 | |
| 109 | static const struct regmap_irq_chip stpmic1_regmap_irq_chip = { |
| 110 | .name = "pmic_irq", |
| 111 | .status_base = INT_PENDING_R1, |
Aidan MacDonald | c79e387 | 2022-11-12 15:18:32 +0000 | [diff] [blame] | 112 | .mask_base = INT_SET_MASK_R1, |
| 113 | .unmask_base = INT_CLEAR_MASK_R1, |
| 114 | .mask_unmask_non_inverted = true, |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 115 | .ack_base = INT_CLEAR_R1, |
| 116 | .num_regs = STPMIC1_PMIC_NUM_IRQ_REGS, |
| 117 | .irqs = stpmic1_irqs, |
| 118 | .num_irqs = ARRAY_SIZE(stpmic1_irqs), |
| 119 | }; |
| 120 | |
Sean Nyekjaer | 6e9df38 | 2023-06-02 08:24:26 +0200 | [diff] [blame] | 121 | static int stpmic1_power_off(struct sys_off_data *data) |
| 122 | { |
| 123 | struct stpmic1 *ddata = data->cb_data; |
| 124 | |
| 125 | regmap_update_bits(ddata->regmap, MAIN_CR, |
| 126 | SOFTWARE_SWITCH_OFF, SOFTWARE_SWITCH_OFF); |
| 127 | |
| 128 | return NOTIFY_DONE; |
| 129 | } |
| 130 | |
Uwe Kleine-König | 39cabdc | 2022-11-18 23:43:16 +0100 | [diff] [blame] | 131 | static int stpmic1_probe(struct i2c_client *i2c) |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 132 | { |
| 133 | struct stpmic1 *ddata; |
| 134 | struct device *dev = &i2c->dev; |
| 135 | int ret; |
| 136 | struct device_node *np = dev->of_node; |
| 137 | u32 reg; |
| 138 | |
| 139 | ddata = devm_kzalloc(dev, sizeof(struct stpmic1), GFP_KERNEL); |
| 140 | if (!ddata) |
| 141 | return -ENOMEM; |
| 142 | |
| 143 | i2c_set_clientdata(i2c, ddata); |
| 144 | ddata->dev = dev; |
| 145 | |
| 146 | ddata->regmap = devm_regmap_init_i2c(i2c, &stpmic1_regmap_config); |
| 147 | if (IS_ERR(ddata->regmap)) |
| 148 | return PTR_ERR(ddata->regmap); |
| 149 | |
| 150 | ddata->irq = of_irq_get(np, STPMIC1_MAIN_IRQ); |
| 151 | if (ddata->irq < 0) { |
| 152 | dev_err(dev, "Failed to get main IRQ: %d\n", ddata->irq); |
| 153 | return ddata->irq; |
| 154 | } |
| 155 | |
| 156 | ret = regmap_read(ddata->regmap, VERSION_SR, ®); |
| 157 | if (ret) { |
| 158 | dev_err(dev, "Unable to read PMIC version\n"); |
| 159 | return ret; |
| 160 | } |
| 161 | dev_info(dev, "PMIC Chip Version: 0x%x\n", reg); |
| 162 | |
| 163 | /* Initialize PMIC IRQ Chip & associated IRQ domains */ |
| 164 | ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq, |
| 165 | IRQF_ONESHOT | IRQF_SHARED, |
| 166 | 0, &stpmic1_regmap_irq_chip, |
| 167 | &ddata->irq_data); |
| 168 | if (ret) { |
| 169 | dev_err(dev, "IRQ Chip registration failed: %d\n", ret); |
| 170 | return ret; |
| 171 | } |
| 172 | |
Sean Nyekjaer | 6e9df38 | 2023-06-02 08:24:26 +0200 | [diff] [blame] | 173 | ret = devm_register_sys_off_handler(ddata->dev, |
| 174 | SYS_OFF_MODE_POWER_OFF, |
| 175 | SYS_OFF_PRIO_DEFAULT, |
| 176 | stpmic1_power_off, |
| 177 | ddata); |
| 178 | if (ret) { |
| 179 | dev_err(ddata->dev, "failed to register sys-off handler: %d\n", ret); |
| 180 | return ret; |
| 181 | } |
| 182 | |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 183 | return devm_of_platform_populate(dev); |
| 184 | } |
| 185 | |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 186 | static int stpmic1_suspend(struct device *dev) |
| 187 | { |
| 188 | struct i2c_client *i2c = to_i2c_client(dev); |
| 189 | struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c); |
| 190 | |
| 191 | disable_irq(pmic_dev->irq); |
| 192 | |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | static int stpmic1_resume(struct device *dev) |
| 197 | { |
| 198 | struct i2c_client *i2c = to_i2c_client(dev); |
| 199 | struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c); |
| 200 | int ret; |
| 201 | |
| 202 | ret = regcache_sync(pmic_dev->regmap); |
| 203 | if (ret) |
| 204 | return ret; |
| 205 | |
| 206 | enable_irq(pmic_dev->irq); |
| 207 | |
| 208 | return 0; |
| 209 | } |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 210 | |
Paul Cercueil | e4b9a17 | 2022-10-23 10:48:32 +0100 | [diff] [blame] | 211 | static DEFINE_SIMPLE_DEV_PM_OPS(stpmic1_pm, stpmic1_suspend, stpmic1_resume); |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 212 | |
| 213 | static const struct of_device_id stpmic1_of_match[] = { |
| 214 | { .compatible = "st,stpmic1", }, |
| 215 | {}, |
| 216 | }; |
| 217 | MODULE_DEVICE_TABLE(of, stpmic1_of_match); |
| 218 | |
| 219 | static struct i2c_driver stpmic1_driver = { |
| 220 | .driver = { |
| 221 | .name = "stpmic1", |
Zhu Wang | 9425f72 | 2023-08-08 21:00:20 +0800 | [diff] [blame] | 222 | .of_match_table = stpmic1_of_match, |
Paul Cercueil | e4b9a17 | 2022-10-23 10:48:32 +0100 | [diff] [blame] | 223 | .pm = pm_sleep_ptr(&stpmic1_pm), |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 224 | }, |
Uwe Kleine-König | 9816d85 | 2023-05-15 20:27:52 +0200 | [diff] [blame] | 225 | .probe = stpmic1_probe, |
Pascal PAILLET-LME | 51908d2 | 2019-01-14 10:05:16 +0000 | [diff] [blame] | 226 | }; |
| 227 | |
| 228 | module_i2c_driver(stpmic1_driver); |
| 229 | |
| 230 | MODULE_DESCRIPTION("STPMIC1 PMIC Driver"); |
| 231 | MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>"); |
| 232 | MODULE_LICENSE("GPL v2"); |