Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > linux.kernel > #1182153

[PATCH] Input: wdt87xx_i2c - Change the sleep time to 2500ms after the sw reset

From HungNien Chen <hn.chen@weidahitech.com>
Newsgroups linux.kernel
Subject [PATCH] Input: wdt87xx_i2c - Change the sleep time to 2500ms after the sw reset
Date 2015-07-11 16:40 +0200
Message-ID <pL46C-4hQ-9@gated-at.bofh.it> (permalink)
Organization linux.* mail to news gateway

Show all headers | View raw


 The original value is 200ms, it includes the loading fw & boot up to
 the main function. After that, the main function will do algorithm
 initialized and touch calibrtion about 1.1 second. The touch
 calibration will change controller freq to scan the best working freq 
 and it has risk to make the i2c data error when doing fw update. 
 We extend the sleep to 2500ms after the sw reset to skip this period time.

Signed-off-by: HungNien Chen <hn.chen@weidahitech.com>
---
 drivers/input/touchscreen/wdt87xx_i2c.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/wdt87xx_i2c.c b/drivers/input/touchscreen/wdt87xx_i2c.c
index b97cb4f..cfd1487 100644
--- a/drivers/input/touchscreen/wdt87xx_i2c.c
+++ b/drivers/input/touchscreen/wdt87xx_i2c.c
@@ -157,6 +157,7 @@
 /* Controller requires minimum 300us between commands */
 #define WDT_COMMAND_DELAY_MS		2
 #define WDT_FLASH_WRITE_DELAY_MS	4
+#define	WDT_FW_RESET_TIME		2500
 
 struct wdt87xx_sys_param {
 	u16	fw_id;
@@ -413,7 +414,7 @@ static int wdt87xx_sw_reset(struct i2c_client *client)
 	}
 
 	/* Wait the device to be ready */
-	msleep(200);
+	msleep(WDT_FW_RESET_TIME);
 
 	return 0;
 }
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread


Thread

[PATCH] Input: wdt87xx_i2c - Change the sleep time to 2500ms after the sw reset HungNien Chen <hn.chen@weidahitech.com> - 2015-07-11 16:40 +0200
  RE: [PATCH] Input: wdt87xx_i2c - Change the sleep time to 2500ms after the sw reset "Hn Chen" <hn.chen@weidahitech.com> - 2015-07-13 13:50 +0200

csiph-web