mfd: max77620: Support Maxim 77663

Add support for Maxim 77663 using the Max77620 driver. The hardware
is very similar to Max77663/20024, although there are couple minor
differences.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

2 files changed, 69 insertions, 1 deletions

diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
index d8ddd1a6f304..c2d88a5eca7a 100644
--- a/drivers/mfd/max77620.c
+++ b/drivers/mfd/max77620.c
@@ -111,6 +111,26 @@ static const struct mfd_cell max20024_children[] = {
         },
 };
 
+static const struct mfd_cell max77663_children[] = {
+        { .name = "max77620-pinctrl", },
+        { .name = "max77620-clock", },
+        { .name = "max77663-pmic", },
+        { .name = "max77620-watchdog", },
+        {
+                .name = "max77620-gpio",
+                .resources = gpio_resources,
+                .num_resources = ARRAY_SIZE(gpio_resources),
+        }, {
+                .name = "max77620-rtc",
+                .resources = rtc_resources,
+                .num_resources = ARRAY_SIZE(rtc_resources),
+        }, {
+                .name = "max77663-power",
+                .resources = power_resources,
+                .num_resources = ARRAY_SIZE(power_resources),
+        },
+};
+
 static const struct regmap_range max77620_readable_ranges[] = {
         regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
 };
@@ -171,6 +191,35 @@ static const struct regmap_config max20024_regmap_config = {
         .volatile_table = &max77620_volatile_table,
 };
 
+static const struct regmap_range max77663_readable_ranges[] = {
+        regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_CID5),
+};
+
+static const struct regmap_access_table max77663_readable_table = {
+        .yes_ranges = max77663_readable_ranges,
+        .n_yes_ranges = ARRAY_SIZE(max77663_readable_ranges),
+};
+
+static const struct regmap_range max77663_writable_ranges[] = {
+        regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_CID5),
+};
+
+static const struct regmap_access_table max77663_writable_table = {
+        .yes_ranges = max77663_writable_ranges,
+        .n_yes_ranges = ARRAY_SIZE(max77663_writable_ranges),
+};
+
+static const struct regmap_config max77663_regmap_config = {
+        .name = "power-slave",
+        .reg_bits = 8,
+        .val_bits = 8,
+        .max_register = MAX77620_REG_CID5 + 1,
+        .cache_type = REGCACHE_RBTREE,
+        .rd_table = &max77663_readable_table,
+        .wr_table = &max77663_writable_table,
+        .volatile_table = &max77620_volatile_table,
+};
+
 /*
  * MAX77620 and MAX20024 has the following steps of the interrupt handling
  * for TOP interrupts:
@@ -240,6 +289,9 @@ static int max77620_get_fps_period_reg_value(struct max77620_chip *chip,
         case MAX77620:
                 fps_min_period = MAX77620_FPS_PERIOD_MIN_US;
                 break;
+        case MAX77663:
+                fps_min_period = MAX20024_FPS_PERIOD_MIN_US;
+                break;
         default:
                 return -EINVAL;
         }
@@ -274,6 +326,9 @@ static int max77620_config_fps(struct max77620_chip *chip,
         case MAX77620:
                 fps_max_period = MAX77620_FPS_PERIOD_MAX_US;
                 break;
+        case MAX77663:
+                fps_max_period = MAX20024_FPS_PERIOD_MAX_US;
+                break;
         default:
                 return -EINVAL;
         }
@@ -375,6 +430,9 @@ static int max77620_initialise_fps(struct max77620_chip *chip)
         }
 
 skip_fps:
+        if (chip->chip_id == MAX77663)
+                return 0;
+
         /* Enable wake on EN0 pin */
         ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
                                  MAX77620_ONOFFCNFG2_WK_EN0,
@@ -453,6 +511,11 @@ static int max77620_probe(struct i2c_client *client,
                 n_mfd_cells = ARRAY_SIZE(max20024_children);
                 rmap_config = &max20024_regmap_config;
                 break;
+        case MAX77663:
+                mfd_cells = max77663_children;
+                n_mfd_cells = ARRAY_SIZE(max77663_children);
+                rmap_config = &max77663_regmap_config;
+                break;
         default:
                 dev_err(chip->dev, "ChipID is invalid %d\n", chip->chip_id);
                 return -EINVAL;
@@ -546,6 +609,9 @@ static int max77620_i2c_suspend(struct device *dev)
                 return ret;
         }
 
+        if (chip->chip_id == MAX77663)
+                goto out;
+
         /* Disable WK_EN0 */
         ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
                                  MAX77620_ONOFFCNFG2_WK_EN0, 0);
@@ -581,7 +647,7 @@ static int max77620_i2c_resume(struct device *dev)
          * For MAX20024: No need to configure WKEN0 on resume as
          * it is configured on Init.
          */
-        if (chip->chip_id == MAX20024)
+        if (chip->chip_id == MAX20024 || chip->chip_id == MAX77663)
                 goto out;
 
         /* Enable WK_EN0 */
@@ -603,6 +669,7 @@ out:
 static const struct i2c_device_id max77620_id[] = {
         {"max77620", MAX77620},
         {"max20024", MAX20024},
+        {"max77663", MAX77663},
         {},
 };
 
diff --git a/include/linux/mfd/max77620.h b/include/linux/mfd/max77620.h
index b4fd5a7c2aaa..82407fe85ca2 100644
--- a/include/linux/mfd/max77620.h
+++ b/include/linux/mfd/max77620.h
@@ -324,6 +324,7 @@ enum max77620_fps_src {
 enum max77620_chip_id {
         MAX77620,
         MAX20024,
+        MAX77663,
 };
 
 struct max77620_chip {