[PATCH 07/14] Input: samsung-keypad - use per-chip parameters

Dmitry Torokhov
2024-08-19T04:58:34Z

Instead of doing conditional logic based on the chip type, define
per-chip parameter structure, and reference it in the match data
(either of_device_id or platform_device_id).

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
drivers/input/keyboard/samsung-keypad.c | 61 +++++++++++++++----------
1 file changed, 37 insertions(+), 24 deletions(-)

diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c
index 71f5b85b02bd..ccc1186e43b6 100644
--- a/drivers/input/keyboard/samsung-keypad.c
+++ b/drivers/input/keyboard/samsung-keypad.c
@@ -44,8 +44,7 @@
#define S5PV210_KEYIFSTSCLR_R_INT_OFFSET 16

/* SAMSUNG_KEYIFCOL */
-#define SAMSUNG_KEYIFCOL_MASK (0xff << 0)
-#define S5PV210_KEYIFCOLEN_MASK (0xff << 8)
+#define SAMSUNG_KEYIFCOL_MASK 0xff

/* SAMSUNG_KEYIFROW */
#define SAMSUNG_KEYIFROW_MASK (0xff << 0)
@@ -54,12 +53,12 @@
/* SAMSUNG_KEYIFFC */
#define SAMSUNG_KEYIFFC_MASK (0x3ff << 0)

-enum samsung_keypad_type {
- KEYPAD_TYPE_SAMSUNG,
- KEYPAD_TYPE_S5PV210,
+struct samsung_chip_info {
+ unsigned int column_shift;
};

struct samsung_keypad {
+ const struct samsung_chip_info *chip;
struct input_dev *input_dev;
struct platform_device *pdev;
struct clk *clk;
@@ -68,7 +67,6 @@ struct samsung_keypad {
bool stopped;
bool wake_enabled;
int irq;
- enum samsung_keypad_type type;
unsigned int row_shift;
unsigned int rows;
unsigned int cols;
@@ -83,13 +81,8 @@ static void samsung_keypad_scan(struct samsung_keypad *keypad,
unsigned int val;

for (col = 0; col < keypad->cols; col++) {
- if (keypad->type == KEYPAD_TYPE_S5PV210) {
- val = S5PV210_KEYIFCOLEN_MASK;
- val &= ~(1 << col) << 8;
- } else {
- val = SAMSUNG_KEYIFCOL_MASK;
- val &= ~(1 << col);
- }
+ val = SAMSUNG_KEYIFCOL_MASK & ~(1 << col);
+ val <<= keypad->chip->column_shift;

writel(val, keypad->base + SAMSUNG_KEYIFCOL);
mdelay(1);
@@ -321,6 +314,7 @@ static int samsung_keypad_probe(struct platform_device *pdev)
{
const struct samsung_keypad_platdata *pdata;
const struct matrix_keymap_data *keymap_data;
+ const struct platform_device_id *id;
struct samsung_keypad *keypad;
struct resource *res;
struct input_dev *input_dev;
@@ -385,11 +379,17 @@ static int samsung_keypad_probe(struct platform_device *pdev)
keypad->stopped = true;
init_waitqueue_head(&keypad->wait);

- if (pdev->dev.of_node)
- keypad->type = of_device_is_compatible(pdev->dev.of_node,
- "samsung,s5pv210-keypad");
- else
- keypad->type = platform_get_device_id(pdev)->driver_data;
+ keypad->chip = device_get_match_data(&pdev->dev);
+ if (!keypad->chip) {
+ id = platform_get_device_id(pdev);
+ if (id)
+ keypad->chip = (const void *)id->driver_data;
+ }
+
+ if (!keypad->chip) {
+ dev_err(&pdev->dev, "Unable to determine chip type");
+ return -EINVAL;
+ }

input_dev->name = pdev->name;
input_dev->id.bustype = BUS_HOST;
@@ -551,11 +551,24 @@ static const struct dev_pm_ops samsung_keypad_pm_ops = {
samsung_keypad_runtime_resume, NULL)
};

+static const struct samsung_chip_info samsung_s3c6410_chip_info = {
+ .column_shift = 0,
+};
+
+static const struct samsung_chip_info samsung_s5pv210_chip_info = {
+ .column_shift = 8,
+};
+
#ifdef CONFIG_OF
static const struct of_device_id samsung_keypad_dt_match[] = {
- { .compatible = "samsung,s3c6410-keypad" },
- { .compatible = "samsung,s5pv210-keypad" },
- {},
+ {
+ .compatible = "samsung,s3c6410-keypad",
+ .data = &samsung_s3c6410_chip_info,
+ }, {
+ .compatible = "samsung,s5pv210-keypad",
+ .data = &samsung_s5pv210_chip_info,
+ },
+ { }
};
MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match);
#endif
@@ -563,12 +576,12 @@ MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match);
static const struct platform_device_id samsung_keypad_driver_ids[] = {
{
.name = "samsung-keypad",
- .driver_data = KEYPAD_TYPE_SAMSUNG,
+ .driver_data = (kernel_ulong_t)&samsung_s3c6410_chip_info,
}, {
.name = "s5pv210-keypad",
- .driver_data = KEYPAD_TYPE_S5PV210,
+ .driver_data = (kernel_ulong_t)&samsung_s5pv210_chip_info,
},
- { },
+ { }
};
MODULE_DEVICE_TABLE(platform, samsung_keypad_driver_ids);

--
2.46.0.184.g6999bdac58-goog