[PATCH v7 1/8] Input: wm97xx: split out touchscreen registering

Robert Jarzmik
2017-09-13T19:37:16Z

wm97xx-core does several things in it initialization :
- touchscreen input device setup
- battery device creation

As the wm97xx is actually a multi-function device handling an audio
codec, a touchscreen, a gpio block and an ADC, reshape the probing to
isolate what is truly input/touchscreen specific from the remaining
part.

This is only code shuffling, there is no functional change.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
Since v1:
- took into account Charles's comment
---
drivers/input/touchscreen/wm97xx-core.c | 196 +++++++++++++++++++-------------
1 file changed, 115 insertions(+), 81 deletions(-)

diff --git a/drivers/input/touchscreen/wm97xx-core.c b/drivers/input/touchscreen/wm97xx-core.c
index c9d1c91e1887..39869ffdc4fa 100644
--- a/drivers/input/touchscreen/wm97xx-core.c
+++ b/drivers/input/touchscreen/wm97xx-core.c
@@ -581,27 +581,85 @@ static void wm97xx_ts_input_close(struct input_dev *idev)
wm->codec->acc_enable(wm, 0);
}

-static int wm97xx_probe(struct device *dev)
+static int wm97xx_register_touch(struct wm97xx *wm)
{
- struct wm97xx *wm;
- struct wm97xx_pdata *pdata = dev_get_platdata(dev);
- int ret = 0, id = 0;
+ struct wm97xx_pdata *pdata = dev_get_platdata(wm->dev);
+ int ret;

- wm = kzalloc(sizeof(struct wm97xx), GFP_KERNEL);
- if (!wm)
+ wm->input_dev = devm_input_allocate_device(wm->dev);
+ if (wm->input_dev == NULL)
return -ENOMEM;
- mutex_init(&wm->codec_mutex);

- wm->dev = dev;
- dev_set_drvdata(dev, wm);
- wm->ac97 = to_ac97_t(dev);
+ /* set up touch configuration */
+ wm->input_dev->name = "wm97xx touchscreen";
+ wm->input_dev->phys = "wm97xx";
+ wm->input_dev->open = wm97xx_ts_input_open;
+ wm->input_dev->close = wm97xx_ts_input_close;
+
+ __set_bit(EV_ABS, wm->input_dev->evbit);
+ __set_bit(EV_KEY, wm->input_dev->evbit);
+ __set_bit(BTN_TOUCH, wm->input_dev->keybit);
+
+ input_set_abs_params(wm->input_dev, ABS_X, abs_x[0], abs_x[1],
+ abs_x[2], 0);
+ input_set_abs_params(wm->input_dev, ABS_Y, abs_y[0], abs_y[1],
+ abs_y[2], 0);
+ input_set_abs_params(wm->input_dev, ABS_PRESSURE, abs_p[0], abs_p[1],
+ abs_p[2], 0);
+
+ input_set_drvdata(wm->input_dev, wm);
+ wm->input_dev->dev.parent = wm->dev;
+
+ ret = input_register_device(wm->input_dev);
+ if (ret)
+ return ret;
+
+ /*
+ * register our extended touch device (for machine specific
+ * extensions)
+ */
+ wm->touch_dev = platform_device_alloc("wm97xx-touch", -1);
+ if (!wm->touch_dev) {
+ ret = -ENOMEM;
+ goto touch_err;
+ }
+ platform_set_drvdata(wm->touch_dev, wm);
+ wm->touch_dev->dev.parent = wm->dev;
+ wm->touch_dev->dev.platform_data = pdata;
+ ret = platform_device_add(wm->touch_dev);
+ if (ret < 0)
+ goto touch_reg_err;
+
+ return 0;
+touch_reg_err:
+ platform_device_put(wm->touch_dev);
+touch_err:
+ input_unregister_device(wm->input_dev);
+ wm->input_dev = NULL;
+
+ return ret;
+}
+
+static void wm97xx_unregister_touch(struct wm97xx *wm)
+{
+ platform_device_unregister(wm->touch_dev);
+ input_unregister_device(wm->input_dev);
+ wm->input_dev = NULL;
+}
+
+static int _wm97xx_probe(struct wm97xx *wm)
+{
+ int id = 0;
+
+ mutex_init(&wm->codec_mutex);
+ dev_set_drvdata(wm->dev, wm);

/* check that we have a supported codec */
id = wm97xx_reg_read(wm, AC97_VENDOR_ID1);
if (id != WM97XX_ID1) {
- dev_err(dev, "Device with vendor %04x is not a wm97xx\n", id);
- ret = -ENODEV;
- goto alloc_err;
+ dev_err(wm->dev,
+ "Device with vendor %04x is not a wm97xx\n", id);
+ return -ENODEV;
}

wm->id = wm97xx_reg_read(wm, AC97_VENDOR_ID2);
@@ -629,8 +687,7 @@ static int wm97xx_probe(struct device *dev)
default:
dev_err(wm->dev, "Support for wm97%02x not compiled in.\n",
wm->id & 0xff);
- ret = -ENODEV;
- goto alloc_err;
+ return -ENODEV;
}

/* set up physical characteristics */
@@ -644,79 +701,58 @@ static int wm97xx_probe(struct device *dev)
wm->gpio[4] = wm97xx_reg_read(wm, AC97_GPIO_STATUS);
wm->gpio[5] = wm97xx_reg_read(wm, AC97_MISC_AFE);

- wm->input_dev = input_allocate_device();
- if (wm->input_dev == NULL) {
- ret = -ENOMEM;
- goto alloc_err;
- }
-
- /* set up touch configuration */
- wm->input_dev->name = "wm97xx touchscreen";
- wm->input_dev->phys = "wm97xx";
- wm->input_dev->open = wm97xx_ts_input_open;
- wm->input_dev->close = wm97xx_ts_input_close;
-
- __set_bit(EV_ABS, wm->input_dev->evbit);
- __set_bit(EV_KEY, wm->input_dev->evbit);
- __set_bit(BTN_TOUCH, wm->input_dev->keybit);
-
- input_set_abs_params(wm->input_dev, ABS_X, abs_x[0], abs_x[1],
- abs_x[2], 0);
- input_set_abs_params(wm->input_dev, ABS_Y, abs_y[0], abs_y[1],
- abs_y[2], 0);
- input_set_abs_params(wm->input_dev, ABS_PRESSURE, abs_p[0], abs_p[1],
- abs_p[2], 0);
+ return wm97xx_register_touch(wm);
+}

- input_set_drvdata(wm->input_dev, wm);
- wm->input_dev->dev.parent = dev;
+static void wm97xx_remove_battery(struct wm97xx *wm)
+{
+ platform_device_unregister(wm->battery_dev);
+}

- ret = input_register_device(wm->input_dev);
- if (ret < 0)
- goto dev_alloc_err;
+static int wm97xx_add_battery(struct wm97xx *wm,
+ struct wm97xx_batt_pdata *pdata)
+{
+ int ret;

- /* register our battery device */
wm->battery_dev = platform_device_alloc("wm97xx-battery", -1);
- if (!wm->battery_dev) {
- ret = -ENOMEM;
- goto batt_err;
- }
+ if (!wm->battery_dev)
+ return -ENOMEM;
+
platform_set_drvdata(wm->battery_dev, wm);
- wm->battery_dev->dev.parent = dev;
- wm->battery_dev->dev.platform_data = pdata ? pdata->batt_pdata : NULL;
+ wm->battery_dev->dev.parent = wm->dev;
+ wm->battery_dev->dev.platform_data = pdata;
ret = platform_device_add(wm->battery_dev);
- if (ret < 0)
- goto batt_reg_err;
+ if (ret)
+ platform_device_put(wm->battery_dev);

- /* register our extended touch device (for machine specific
- * extensions) */
- wm->touch_dev = platform_device_alloc("wm97xx-touch", -1);
- if (!wm->touch_dev) {
- ret = -ENOMEM;
- goto touch_err;
- }
- platform_set_drvdata(wm->touch_dev, wm);
- wm->touch_dev->dev.parent = dev;
- wm->touch_dev->dev.platform_data = pdata;
- ret = platform_device_add(wm->touch_dev);
+ return ret;
+}
+
+static int wm97xx_probe(struct device *dev)
+{
+ struct wm97xx *wm;
+ int ret;
+ struct wm97xx_pdata *pdata = dev_get_platdata(dev);
+
+ wm = devm_kzalloc(dev, sizeof(struct wm97xx), GFP_KERNEL);
+ if (!wm)
+ return -ENOMEM;
+
+ wm->dev = dev;
+ wm->ac97 = to_ac97_t(dev);
+
+ ret = _wm97xx_probe(wm);
+ if (ret)
+ return ret;
+
+ ret = wm97xx_add_battery(wm, pdata ? pdata->batt_pdata : NULL);
if (ret < 0)
- goto touch_reg_err;
+ goto batt_err;

return ret;

- touch_reg_err:
- platform_device_put(wm->touch_dev);
- touch_err:
- platform_device_del(wm->battery_dev);
- batt_reg_err:
- platform_device_put(wm->battery_dev);
- batt_err:
- input_unregister_device(wm->input_dev);
- wm->input_dev = NULL;
- dev_alloc_err:
- input_free_device(wm->input_dev);
- alloc_err:
- kfree(wm);
-
+batt_err:
+ wm97xx_unregister_touch(wm);
return ret;
}

@@ -724,10 +760,8 @@ static int wm97xx_remove(struct device *dev)
{
struct wm97xx *wm = dev_get_drvdata(dev);

- platform_device_unregister(wm->battery_dev);
- platform_device_unregister(wm->touch_dev);
- input_unregister_device(wm->input_dev);
- kfree(wm);
+ wm97xx_remove_battery(wm);
+ wm97xx_unregister_touch(wm);

return 0;
}
--
2.11.0