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Input: pixcir_i2c_ts - use standard OF touchscreen parsing code
Let's switch to using standard touchscreen device properties parsing module instead of doing it by hand in the driver. Acked-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
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69b8c2a50c
commit
d48259a0d2
1 changed files with 44 additions and 51 deletions
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@ -24,9 +24,10 @@
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#include <linux/i2c.h>
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#include <linux/input.h>
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#include <linux/input/mt.h>
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#include <linux/input/touchscreen.h>
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#include <linux/gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/of.h>
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/*#include <linux/of.h>*/
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#include <linux/of_device.h>
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#include <linux/platform_data/pixcir_i2c_ts.h>
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@ -37,9 +38,9 @@ struct pixcir_i2c_ts_data {
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struct input_dev *input;
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struct gpio_desc *gpio_attb;
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struct gpio_desc *gpio_reset;
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const struct pixcir_ts_platform_data *pdata;
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bool running;
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const struct pixcir_i2c_chip_data *chip;
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int max_fingers; /* Max fingers supported in this instance */
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bool running;
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};
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struct pixcir_touch {
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@ -62,7 +63,7 @@ static void pixcir_ts_parse(struct pixcir_i2c_ts_data *tsdata,
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u8 touch;
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int ret, i;
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int readsize;
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const struct pixcir_i2c_chip_data *chip = &tsdata->pdata->chip;
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const struct pixcir_i2c_chip_data *chip = tsdata->chip;
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memset(report, 0, sizeof(struct pixcir_report_data));
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@ -115,13 +116,13 @@ static void pixcir_ts_report(struct pixcir_i2c_ts_data *ts,
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struct pixcir_touch *touch;
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int n, i, slot;
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struct device *dev = &ts->client->dev;
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const struct pixcir_i2c_chip_data *chip = &ts->pdata->chip;
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const struct pixcir_i2c_chip_data *chip = ts->chip;
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n = report->num_touches;
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if (n > PIXCIR_MAX_SLOTS)
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n = PIXCIR_MAX_SLOTS;
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if (!chip->has_hw_ids) {
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if (!ts->chip->has_hw_ids) {
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for (i = 0; i < n; i++) {
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touch = &report->touches[i];
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pos[i].x = touch->x;
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@ -423,77 +424,59 @@ static SIMPLE_DEV_PM_OPS(pixcir_dev_pm_ops,
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#ifdef CONFIG_OF
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static const struct of_device_id pixcir_of_match[];
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static struct pixcir_ts_platform_data *pixcir_parse_dt(struct device *dev)
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static int pixcir_parse_dt(struct device *dev,
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struct pixcir_i2c_ts_data *tsdata)
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{
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struct pixcir_ts_platform_data *pdata;
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struct device_node *np = dev->of_node;
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const struct of_device_id *match;
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match = of_match_device(of_match_ptr(pixcir_of_match), dev);
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if (!match)
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return ERR_PTR(-EINVAL);
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return -EINVAL;
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pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return ERR_PTR(-ENOMEM);
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tsdata->chip = (const struct pixcir_i2c_chip_data *)match->data;
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if (!tsdata->chip)
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return -EINVAL;
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pdata->chip = *(const struct pixcir_i2c_chip_data *)match->data;
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if (of_property_read_u32(np, "touchscreen-size-x", &pdata->x_max)) {
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dev_err(dev, "Failed to get touchscreen-size-x property\n");
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return ERR_PTR(-EINVAL);
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}
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pdata->x_max -= 1;
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if (of_property_read_u32(np, "touchscreen-size-y", &pdata->y_max)) {
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dev_err(dev, "Failed to get touchscreen-size-y property\n");
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return ERR_PTR(-EINVAL);
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}
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pdata->y_max -= 1;
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dev_dbg(dev, "%s: x %d, y %d\n", __func__,
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pdata->x_max + 1, pdata->y_max + 1);
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return pdata;
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return 0;
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}
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#else
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static struct pixcir_ts_platform_data *pixcir_parse_dt(struct device *dev)
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static int pixcir_parse_dt(struct device *dev,
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struct pixcir_i2c_ts_data *tsdata)
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{
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return ERR_PTR(-EINVAL);
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return -EINVAL;
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}
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#endif
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static int pixcir_i2c_ts_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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const struct i2c_device_id *id)
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{
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const struct pixcir_ts_platform_data *pdata =
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dev_get_platdata(&client->dev);
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struct device *dev = &client->dev;
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struct device_node *np = dev->of_node;
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struct pixcir_i2c_ts_data *tsdata;
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struct input_dev *input;
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int error;
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if (np && !pdata) {
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pdata = pixcir_parse_dt(dev);
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if (IS_ERR(pdata))
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return PTR_ERR(pdata);
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}
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tsdata = devm_kzalloc(dev, sizeof(*tsdata), GFP_KERNEL);
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if (!tsdata)
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return -ENOMEM;
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if (!pdata) {
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if (pdata) {
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tsdata->chip = &pdata->chip;
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} else if (dev->of_node) {
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error = pixcir_parse_dt(dev, tsdata);
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if (error)
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return error;
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} else {
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dev_err(&client->dev, "platform data not defined\n");
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return -EINVAL;
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}
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if (!pdata->chip.max_fingers) {
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dev_err(dev, "Invalid max_fingers in pdata\n");
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if (!tsdata->chip->max_fingers) {
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dev_err(dev, "Invalid max_fingers in chip data\n");
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return -EINVAL;
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}
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tsdata = devm_kzalloc(dev, sizeof(*tsdata), GFP_KERNEL);
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if (!tsdata)
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return -ENOMEM;
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input = devm_input_allocate_device(dev);
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if (!input) {
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dev_err(dev, "Failed to allocate input device\n");
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@ -502,7 +485,6 @@ static int pixcir_i2c_ts_probe(struct i2c_client *client,
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tsdata->client = client;
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tsdata->input = input;
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tsdata->pdata = pdata;
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input->name = client->name;
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input->id.bustype = BUS_I2C;
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@ -510,10 +492,21 @@ static int pixcir_i2c_ts_probe(struct i2c_client *client,
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input->close = pixcir_input_close;
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input->dev.parent = &client->dev;
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input_set_abs_params(input, ABS_MT_POSITION_X, 0, pdata->x_max, 0, 0);
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input_set_abs_params(input, ABS_MT_POSITION_Y, 0, pdata->y_max, 0, 0);
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if (pdata) {
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input_set_abs_params(input, ABS_MT_POSITION_X, 0, pdata->x_max, 0, 0);
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input_set_abs_params(input, ABS_MT_POSITION_Y, 0, pdata->y_max, 0, 0);
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} else {
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input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
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input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
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touchscreen_parse_properties(input, true);
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if (!input_abs_get_max(input, ABS_MT_POSITION_X) ||
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!input_abs_get_max(input, ABS_MT_POSITION_Y)) {
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dev_err(dev, "Touchscreen size is not specified\n");
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return -EINVAL;
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}
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}
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tsdata->max_fingers = tsdata->pdata->chip.max_fingers;
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tsdata->max_fingers = tsdata->chip->max_fingers;
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if (tsdata->max_fingers > PIXCIR_MAX_SLOTS) {
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tsdata->max_fingers = PIXCIR_MAX_SLOTS;
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dev_info(dev, "Limiting maximum fingers to %d\n",
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