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