diff options
| author | Shantanu Jain <shjain@codeaurora.org> | 2015-05-19 15:29:26 +0530 |
|---|---|---|
| committer | Abinaya P <abinayap@codeaurora.org> | 2016-08-03 11:50:18 +0530 |
| commit | 6cb6901ff00ff329fc9fb4afb5cf1c26ffa42001 (patch) | |
| tree | 9c2b4cbb5a293ba4be8d20feaab3b4492da70a63 /drivers/input | |
| parent | 4c2063bfb3e9378e0e5925ef4118342fa89bf019 (diff) | |
input: it7258_ts_i2c: add low reset and reset delay support
Add low reset gpio and delay reset support for ITE tech
driver.
ITE tech controller support low reset gpio configuration. This
property is parsed from the DT, and reset gpio is set to low.
Reset delay value is also parsed from DT which is required by the
ITE tech controller.
Change-Id: I314677747e8bbbcb273cd898376bbe03197c8c25
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/it7258_ts_i2c.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/drivers/input/touchscreen/it7258_ts_i2c.c b/drivers/input/touchscreen/it7258_ts_i2c.c index 2a161cdd75ea..85da1323b89e 100644 --- a/drivers/input/touchscreen/it7258_ts_i2c.c +++ b/drivers/input/touchscreen/it7258_ts_i2c.c @@ -130,6 +130,7 @@ #define PINCTRL_STATE_ACTIVE "pmx_ts_active" #define PINCTRL_STATE_SUSPEND "pmx_ts_suspend" #define PINCTRL_STATE_RELEASE "pmx_ts_release" +#define IT_I2C_WAIT 1000 struct FingerData { uint8_t xLo; @@ -163,6 +164,8 @@ struct IT7260_ts_platform_data { unsigned int disp_maxx; unsigned int disp_maxy; unsigned num_of_fingers; + unsigned int reset_delay; + bool low_reset; }; struct IT7260_ts_data { @@ -285,7 +288,7 @@ static bool IT7260_waitDeviceReady(bool forever, bool slowly) query = CMD_STATUS_BUSY; if (slowly) - mdelay(1000); + msleep(IT_I2C_WAIT); if (!forever) count--; @@ -1259,6 +1262,16 @@ static int IT7260_parse_dt(struct device *dev, snprintf(gl_ts->cfg_name, MAX_BUFFER_SIZE, "%s", (pdata->cfg_name != NULL) ? pdata->cfg_name : CFG_NAME); + rc = of_property_read_u32(np, "ite,reset-delay", &temp_val); + if (!rc) + pdata->reset_delay = temp_val; + else if (rc != -EINVAL) { + dev_err(dev, "Unable to read reset delay\n"); + return rc; + } + + pdata->low_reset = of_property_read_bool(np, "ite,low-reset"); + rc = IT7260_get_dt_coords(dev, "ite,display-coords", pdata); if (rc && (rc != -EINVAL)) return rc; @@ -1441,12 +1454,14 @@ static int IT7260_ts_probe(struct i2c_client *client, if (gpio_request(pdata->reset_gpio, "ite_reset_gpio")) { dev_err(&client->dev, "gpio_request failed for reset GPIO\n"); - return -EINVAL; - } - if (gpio_direction_output(pdata->reset_gpio, 0)) { - dev_err(&client->dev, - "gpio_direction_output for reset GPIO\n"); - return -EINVAL; + if (pdata->low_reset) { + if (gpio_direction_output(pdata->reset_gpio, 0)) + dev_err(&gl_ts->client->dev, + "gpio_direction_output for reset GPIO\n"); + } else { + if (gpio_direction_output(pdata->reset_gpio, 1)) + dev_err(&gl_ts->client->dev, + "gpio_direction_output for reset GPIO\n"); } dev_dbg(&gl_ts->client->dev, "Reset GPIO %d\n", pdata->reset_gpio); @@ -1533,9 +1548,9 @@ static int IT7260_ts_probe(struct i2c_client *client, #endif IT7260_i2cWriteNoReadyCheck(BUF_COMMAND, cmd_start, sizeof(cmd_start)); - mdelay(10); + msleep(pdata->reset_delay); IT7260_i2cReadNoReadyCheck(BUF_RESPONSE, rsp, sizeof(rsp)); - mdelay(10); + msleep(pdata->reset_delay); gl_ts->dir = debugfs_create_dir(DEBUGFS_DIR_NAME, NULL); if (gl_ts->dir == NULL || IS_ERR(gl_ts->dir)) { |