drivers/mfd/hi655x-pmic.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Device driver for MFD hi655x PMIC
   4  *
   5  * Copyright (c) 2016 Hisilicon.
   6  *
   7  * Authors:
   8  * Chen Feng <puck.chen@hisilicon.com>
   9  * Fei  Wang <w.f@huawei.com>
  10  */
  11
  12 #include <linux/gpio.h>
  13 #include <linux/io.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/init.h>
  16 #include <linux/mfd/core.h>
  17 #include <linux/mfd/hi655x-pmic.h>
  18 #include <linux/module.h>
  19 #include <linux/of_gpio.h>
  20 #include <linux/of_platform.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/regmap.h>
  23
  24 static const struct regmap_irq hi655x_irqs[] = {
  25         { .reg_offset = 0, .mask = OTMP_D1R_INT_MASK },
  26         { .reg_offset = 0, .mask = VSYS_2P5_R_INT_MASK },
  27         { .reg_offset = 0, .mask = VSYS_UV_D3R_INT_MASK },
  28         { .reg_offset = 0, .mask = VSYS_6P0_D200UR_INT_MASK },
  29         { .reg_offset = 0, .mask = PWRON_D4SR_INT_MASK },
  30         { .reg_offset = 0, .mask = PWRON_D20F_INT_MASK },
  31         { .reg_offset = 0, .mask = PWRON_D20R_INT_MASK },
  32         { .reg_offset = 0, .mask = RESERVE_INT_MASK },
  33 };
  34
  35 static const struct regmap_irq_chip hi655x_irq_chip = {
  36         .name = "hi655x-pmic",
  37         .irqs = hi655x_irqs,
  38         .num_regs = 1,
  39         .num_irqs = ARRAY_SIZE(hi655x_irqs),
  40         .status_base = HI655X_IRQ_STAT_BASE,
  41         .ack_base = HI655X_IRQ_STAT_BASE,
  42         .mask_base = HI655X_IRQ_MASK_BASE,
  43 };
  44
  45 static struct regmap_config hi655x_regmap_config = {
  46         .reg_bits = 32,
  47         .reg_stride = HI655X_STRIDE,
  48         .val_bits = 8,
  49         .max_register = HI655X_BUS_ADDR(0x400) - HI655X_STRIDE,
  50 };
  51
  52 static struct resource pwrkey_resources[] = {
  53         {
  54                 .name   = "down",
  55                 .start  = PWRON_D20R_INT,
  56                 .end    = PWRON_D20R_INT,
  57                 .flags  = IORESOURCE_IRQ,
  58         }, {
  59                 .name   = "up",
  60                 .start  = PWRON_D20F_INT,
  61                 .end    = PWRON_D20F_INT,
  62                 .flags  = IORESOURCE_IRQ,
  63         }, {
  64                 .name   = "hold 4s",
  65                 .start  = PWRON_D4SR_INT,
  66                 .end    = PWRON_D4SR_INT,
  67                 .flags  = IORESOURCE_IRQ,
  68         },
  69 };
  70
  71 static const struct mfd_cell hi655x_pmic_devs[] = {
  72         {
  73                 .name           = "hi65xx-powerkey",
  74                 .num_resources  = ARRAY_SIZE(pwrkey_resources),
  75                 .resources      = &pwrkey_resources[0],
  76         },
  77         {       .name           = "hi655x-regulator",   },
  78         {       .name           = "hi655x-clk",         },
  79 };
  80
  81 static void hi655x_local_irq_clear(struct regmap *map)
  82 {
  83         int i;
  84
  85         regmap_write(map, HI655X_ANA_IRQM_BASE, HI655X_IRQ_CLR);
  86         for (i = 0; i < HI655X_IRQ_ARRAY; i++) {
  87                 regmap_write(map, HI655X_IRQ_STAT_BASE + i * HI655X_STRIDE,
  88                              HI655X_IRQ_CLR);
  89         }
  90 }
  91
  92 static int hi655x_pmic_probe(struct platform_device *pdev)
  93 {
  94         int ret;
  95         struct hi655x_pmic *pmic;
  96         struct device *dev = &pdev->dev;
  97         struct device_node *np = dev->of_node;
  98         void __iomem *base;
  99
 100         pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
 101         if (!pmic)
 102                 return -ENOMEM;
 103         pmic->dev = dev;
 104
 105         pmic->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 106         base = devm_ioremap_resource(dev, pmic->res);
 107         if (IS_ERR(base))
 108                 return PTR_ERR(base);
 109
 110         pmic->regmap = devm_regmap_init_mmio_clk(dev, NULL, base,
 111                                                  &hi655x_regmap_config);
 112         if (IS_ERR(pmic->regmap))
 113                 return PTR_ERR(pmic->regmap);
 114
 115         regmap_read(pmic->regmap, HI655X_BUS_ADDR(HI655X_VER_REG), &pmic->ver);
 116         if ((pmic->ver < PMU_VER_START) || (pmic->ver > PMU_VER_END)) {
 117                 dev_warn(dev, "PMU version %d unsupported\n", pmic->ver);
 118                 return -EINVAL;
 119         }
 120
 121         hi655x_local_irq_clear(pmic->regmap);
 122
 123         pmic->gpio = of_get_named_gpio(np, "pmic-gpios", 0);
 124         if (!gpio_is_valid(pmic->gpio)) {
 125                 dev_err(dev, "Failed to get the pmic-gpios\n");
 126                 return -ENODEV;
 127         }
 128
 129         ret = devm_gpio_request_one(dev, pmic->gpio, GPIOF_IN,
 130                                     "hi655x_pmic_irq");
 131         if (ret < 0) {
 132                 dev_err(dev, "Failed to request gpio %d  ret = %d\n",
 133                         pmic->gpio, ret);
 134                 return ret;
 135         }
 136
 137         ret = regmap_add_irq_chip(pmic->regmap, gpio_to_irq(pmic->gpio),
 138                                   IRQF_TRIGGER_LOW | IRQF_NO_SUSPEND, 0,
 139                                   &hi655x_irq_chip, &pmic->irq_data);
 140         if (ret) {
 141                 dev_err(dev, "Failed to obtain 'hi655x_pmic_irq' %d\n", ret);
 142                 return ret;
 143         }
 144
 145         platform_set_drvdata(pdev, pmic);
 146
 147         ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, hi655x_pmic_devs,
 148                               ARRAY_SIZE(hi655x_pmic_devs), NULL, 0,
 149                               regmap_irq_get_domain(pmic->irq_data));
 150         if (ret) {
 151                 dev_err(dev, "Failed to register device %d\n", ret);
 152                 regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data);
 153                 return ret;
 154         }
 155
 156         return 0;
 157 }
 158
 159 static int hi655x_pmic_remove(struct platform_device *pdev)
 160 {
 161         struct hi655x_pmic *pmic = platform_get_drvdata(pdev);
 162
 163         regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data);
 164         mfd_remove_devices(&pdev->dev);
 165         return 0;
 166 }
 167
 168 static const struct of_device_id hi655x_pmic_match[] = {
 169         { .compatible = "hisilicon,hi655x-pmic", },
 170         {},
 171 };
 172 MODULE_DEVICE_TABLE(of, hi655x_pmic_match);
 173
 174 static struct platform_driver hi655x_pmic_driver = {
 175         .driver = {
 176                 .name = "hi655x-pmic",
 177                 .of_match_table = of_match_ptr(hi655x_pmic_match),
 178         },
 179         .probe  = hi655x_pmic_probe,
 180         .remove = hi655x_pmic_remove,
 181 };
 182 module_platform_driver(hi655x_pmic_driver);
 183
 184 MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");
 185 MODULE_DESCRIPTION("Hisilicon hi655x PMIC driver");
 186 MODULE_LICENSE("GPL v2");