drivers/mfd/stpmic1.c

   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>
  10 #include <linux/of.h>
  11 #include <linux/of_irq.h>
  12 #include <linux/of_platform.h>
  13 #include <linux/pm_wakeirq.h>
  14 #include <linux/regmap.h>
  15
  16 #include <dt-bindings/mfd/st,stpmic1.h>
  17
  18 #define STPMIC1_MAIN_IRQ 0
  19
  20 static const struct regmap_range stpmic1_readable_ranges[] = {
  21         regmap_reg_range(TURN_ON_SR, VERSION_SR),
  22         regmap_reg_range(SWOFF_PWRCTRL_CR, LDO6_STDBY_CR),
  23         regmap_reg_range(BST_SW_CR, BST_SW_CR),
  24         regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4),
  25         regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4),
  26         regmap_reg_range(INT_MASK_R1, INT_MASK_R4),
  27         regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4),
  28         regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4),
  29         regmap_reg_range(INT_SRC_R1, INT_SRC_R1),
  30 };
  31
  32 static const struct regmap_range stpmic1_writeable_ranges[] = {
  33         regmap_reg_range(SWOFF_PWRCTRL_CR, LDO6_STDBY_CR),
  34         regmap_reg_range(BST_SW_CR, BST_SW_CR),
  35         regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4),
  36         regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4),
  37         regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4),
  38 };
  39
  40 static const struct regmap_range stpmic1_volatile_ranges[] = {
  41         regmap_reg_range(TURN_ON_SR, VERSION_SR),
  42         regmap_reg_range(WCHDG_CR, WCHDG_CR),
  43         regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4),
  44         regmap_reg_range(INT_SRC_R1, INT_SRC_R4),
  45 };
  46
  47 static const struct regmap_access_table stpmic1_readable_table = {
  48         .yes_ranges = stpmic1_readable_ranges,
  49         .n_yes_ranges = ARRAY_SIZE(stpmic1_readable_ranges),
  50 };
  51
  52 static const struct regmap_access_table stpmic1_writeable_table = {
  53         .yes_ranges = stpmic1_writeable_ranges,
  54         .n_yes_ranges = ARRAY_SIZE(stpmic1_writeable_ranges),
  55 };
  56
  57 static const struct regmap_access_table stpmic1_volatile_table = {
  58         .yes_ranges = stpmic1_volatile_ranges,
  59         .n_yes_ranges = ARRAY_SIZE(stpmic1_volatile_ranges),
  60 };
  61
  62 static const struct regmap_config stpmic1_regmap_config = {
  63         .reg_bits = 8,
  64         .val_bits = 8,
  65         .cache_type = REGCACHE_RBTREE,
  66         .max_register = PMIC_MAX_REGISTER_ADDRESS,
  67         .rd_table = &stpmic1_readable_table,
  68         .wr_table = &stpmic1_writeable_table,
  69         .volatile_table = &stpmic1_volatile_table,
  70 };
  71
  72 static const struct regmap_irq stpmic1_irqs[] = {
  73         REGMAP_IRQ_REG(IT_PONKEY_F, 0, 0x01),
  74         REGMAP_IRQ_REG(IT_PONKEY_R, 0, 0x02),
  75         REGMAP_IRQ_REG(IT_WAKEUP_F, 0, 0x04),
  76         REGMAP_IRQ_REG(IT_WAKEUP_R, 0, 0x08),
  77         REGMAP_IRQ_REG(IT_VBUS_OTG_F, 0, 0x10),
  78         REGMAP_IRQ_REG(IT_VBUS_OTG_R, 0, 0x20),
  79         REGMAP_IRQ_REG(IT_SWOUT_F, 0, 0x40),
  80         REGMAP_IRQ_REG(IT_SWOUT_R, 0, 0x80),
  81
  82         REGMAP_IRQ_REG(IT_CURLIM_BUCK1, 1, 0x01),
  83         REGMAP_IRQ_REG(IT_CURLIM_BUCK2, 1, 0x02),
  84         REGMAP_IRQ_REG(IT_CURLIM_BUCK3, 1, 0x04),
  85         REGMAP_IRQ_REG(IT_CURLIM_BUCK4, 1, 0x08),
  86         REGMAP_IRQ_REG(IT_OCP_OTG, 1, 0x10),
  87         REGMAP_IRQ_REG(IT_OCP_SWOUT, 1, 0x20),
  88         REGMAP_IRQ_REG(IT_OCP_BOOST, 1, 0x40),
  89         REGMAP_IRQ_REG(IT_OVP_BOOST, 1, 0x80),
  90
  91         REGMAP_IRQ_REG(IT_CURLIM_LDO1, 2, 0x01),
  92         REGMAP_IRQ_REG(IT_CURLIM_LDO2, 2, 0x02),
  93         REGMAP_IRQ_REG(IT_CURLIM_LDO3, 2, 0x04),
  94         REGMAP_IRQ_REG(IT_CURLIM_LDO4, 2, 0x08),
  95         REGMAP_IRQ_REG(IT_CURLIM_LDO5, 2, 0x10),
  96         REGMAP_IRQ_REG(IT_CURLIM_LDO6, 2, 0x20),
  97         REGMAP_IRQ_REG(IT_SHORT_SWOTG, 2, 0x40),
  98         REGMAP_IRQ_REG(IT_SHORT_SWOUT, 2, 0x80),
  99
 100         REGMAP_IRQ_REG(IT_TWARN_F, 3, 0x01),
 101         REGMAP_IRQ_REG(IT_TWARN_R, 3, 0x02),
 102         REGMAP_IRQ_REG(IT_VINLOW_F, 3, 0x04),
 103         REGMAP_IRQ_REG(IT_VINLOW_R, 3, 0x08),
 104         REGMAP_IRQ_REG(IT_SWIN_F, 3, 0x40),
 105         REGMAP_IRQ_REG(IT_SWIN_R, 3, 0x80),
 106 };
 107
 108 static const struct regmap_irq_chip stpmic1_regmap_irq_chip = {
 109         .name = "pmic_irq",
 110         .status_base = INT_PENDING_R1,
 111         .mask_base = INT_CLEAR_MASK_R1,
 112         .unmask_base = INT_SET_MASK_R1,
 113         .ack_base = INT_CLEAR_R1,
 114         .num_regs = STPMIC1_PMIC_NUM_IRQ_REGS,
 115         .irqs = stpmic1_irqs,
 116         .num_irqs = ARRAY_SIZE(stpmic1_irqs),
 117 };
 118
 119 static int stpmic1_probe(struct i2c_client *i2c,
 120                          const struct i2c_device_id *id)
 121 {
 122         struct stpmic1 *ddata;
 123         struct device *dev = &i2c->dev;
 124         int ret;
 125         struct device_node *np = dev->of_node;
 126         u32 reg;
 127
 128         ddata = devm_kzalloc(dev, sizeof(struct stpmic1), GFP_KERNEL);
 129         if (!ddata)
 130                 return -ENOMEM;
 131
 132         i2c_set_clientdata(i2c, ddata);
 133         ddata->dev = dev;
 134
 135         ddata->regmap = devm_regmap_init_i2c(i2c, &stpmic1_regmap_config);
 136         if (IS_ERR(ddata->regmap))
 137                 return PTR_ERR(ddata->regmap);
 138
 139         ddata->irq = of_irq_get(np, STPMIC1_MAIN_IRQ);
 140         if (ddata->irq < 0) {
 141                 dev_err(dev, "Failed to get main IRQ: %d\n", ddata->irq);
 142                 return ddata->irq;
 143         }
 144
 145         ret = regmap_read(ddata->regmap, VERSION_SR, &reg);
 146         if (ret) {
 147                 dev_err(dev, "Unable to read PMIC version\n");
 148                 return ret;
 149         }
 150         dev_info(dev, "PMIC Chip Version: 0x%x\n", reg);
 151
 152         /* Initialize PMIC IRQ Chip & associated IRQ domains */
 153         ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq,
 154                                        IRQF_ONESHOT | IRQF_SHARED,
 155                                        0, &stpmic1_regmap_irq_chip,
 156                                        &ddata->irq_data);
 157         if (ret) {
 158                 dev_err(dev, "IRQ Chip registration failed: %d\n", ret);
 159                 return ret;
 160         }
 161
 162         return devm_of_platform_populate(dev);
 163 }
 164
 165 #ifdef CONFIG_PM_SLEEP
 166 static int stpmic1_suspend(struct device *dev)
 167 {
 168         struct i2c_client *i2c = to_i2c_client(dev);
 169         struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c);
 170
 171         disable_irq(pmic_dev->irq);
 172
 173         return 0;
 174 }
 175
 176 static int stpmic1_resume(struct device *dev)
 177 {
 178         struct i2c_client *i2c = to_i2c_client(dev);
 179         struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c);
 180         int ret;
 181
 182         ret = regcache_sync(pmic_dev->regmap);
 183         if (ret)
 184                 return ret;
 185
 186         enable_irq(pmic_dev->irq);
 187
 188         return 0;
 189 }
 190 #endif
 191
 192 static SIMPLE_DEV_PM_OPS(stpmic1_pm, stpmic1_suspend, stpmic1_resume);
 193
 194 static const struct of_device_id stpmic1_of_match[] = {
 195         { .compatible = "st,stpmic1", },
 196         {},
 197 };
 198 MODULE_DEVICE_TABLE(of, stpmic1_of_match);
 199
 200 static struct i2c_driver stpmic1_driver = {
 201         .driver = {
 202                 .name = "stpmic1",
 203                 .of_match_table = of_match_ptr(stpmic1_of_match),
 204                 .pm = &stpmic1_pm,
 205         },
 206         .probe = stpmic1_probe,
 207 };
 208
 209 module_i2c_driver(stpmic1_driver);
 210
 211 MODULE_DESCRIPTION("STPMIC1 PMIC Driver");
 212 MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>");
 213 MODULE_LICENSE("GPL v2");