Input: max77693: Prepare for adding support for Maxim 77843

Prepare the driver for supporting two devices: Maxim 77693 and 77843:
1. Add table of device ids and store current device type for later
   usage.
2. Differentiate the haptic device configuration.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 34 insertions, 7 deletions

diff --git a/drivers/input/misc/max77693-haptic.c b/drivers/input/misc/max77693-haptic.c
index 8dc43c1ebf0e..4c0f67ab66d9 100644
--- a/drivers/input/misc/max77693-haptic.c
+++ b/drivers/input/misc/max77693-haptic.c
@@ -47,6 +47,8 @@ enum max77693_haptic_pwm_divisor {
 };
 
 struct max77693_haptic {
+        enum max77693_types dev_type;
+
         struct regmap *regmap_pmic;
         struct regmap *regmap_haptic;
         struct device *dev;
@@ -81,16 +83,23 @@ static int max77693_haptic_set_duty_cycle(struct max77693_haptic *haptic)
 static int max77693_haptic_configure(struct max77693_haptic *haptic,
                                      bool enable)
 {
-        unsigned int value;
+        unsigned int value, config_reg;
         int error;
 
-        value = ((haptic->type << MAX77693_CONFIG2_MODE) |
-                (enable << MAX77693_CONFIG2_MEN) |
-                (haptic->mode << MAX77693_CONFIG2_HTYP) |
-                MAX77693_HAPTIC_PWM_DIVISOR_128);
+        switch (haptic->dev_type) {
+        case TYPE_MAX77693:
+                value = ((haptic->type << MAX77693_CONFIG2_MODE) |
+                        (enable << MAX77693_CONFIG2_MEN) |
+                        (haptic->mode << MAX77693_CONFIG2_HTYP) |
+                        MAX77693_HAPTIC_PWM_DIVISOR_128);
+                config_reg = MAX77693_HAPTIC_REG_CONFIG2;
+                break;
+        default:
+                return -EINVAL;
+        }
 
         error = regmap_write(haptic->regmap_haptic,
-                             MAX77693_HAPTIC_REG_CONFIG2, value);
+                             config_reg, value);
         if (error) {
                 dev_err(haptic->dev,
                         "failed to update haptic config: %d\n", error);
@@ -254,12 +263,23 @@ static int max77693_haptic_probe(struct platform_device *pdev)
                 return -ENOMEM;
 
         haptic->regmap_pmic = max77693->regmap;
-        haptic->regmap_haptic = max77693->regmap_haptic;
         haptic->dev = &pdev->dev;
         haptic->type = MAX77693_HAPTIC_LRA;
         haptic->mode = MAX77693_HAPTIC_EXTERNAL_MODE;
         haptic->suspend_state = false;
 
+        /* Variant-specific init */
+        haptic->dev_type = platform_get_device_id(pdev)->driver_data;
+        switch (haptic->dev_type) {
+        case TYPE_MAX77693:
+                haptic->regmap_haptic = max77693->regmap_haptic;
+                break;
+        default:
+                dev_err(&pdev->dev, "unsupported device type: %u\n",
+                        haptic->dev_type);
+                return -EINVAL;
+        }
+
         INIT_WORK(&haptic->work, max77693_haptic_play_work);
 
         /* Get pwm and regulatot for haptic device */
@@ -337,12 +357,19 @@ static int __maybe_unused max77693_haptic_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(max77693_haptic_pm_ops,
                          max77693_haptic_suspend, max77693_haptic_resume);
 
+static const struct platform_device_id max77693_haptic_id[] = {
+        { "max77693-haptic", TYPE_MAX77693 },
+        {},
+};
+MODULE_DEVICE_TABLE(platform, max77693_haptic_id);
+
 static struct platform_driver max77693_haptic_driver = {
         .driver         = {
                 .name   = "max77693-haptic",
                 .pm     = &max77693_haptic_pm_ops,
         },
         .probe          = max77693_haptic_probe,
+        .id_table       = max77693_haptic_id,
 };
 module_platform_driver(max77693_haptic_driver);