Eric Lee / smarc-ti-linux-kernel

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Commit 3b7cc1146fc8275185929202d5b2ff3372a9ff25

Authored by Lothar Waßmann
Committed by Sekhar Nori
1 parent 4d69a651ca
Exists in ti-linux-3.14.y and in 2 other branches processor-sdk-linux-01.00.00, smarc-ti-linux-3.14.y

Input: edt-ft5x06 - adjust delays to conform datasheet 

[ Upstream commit c0808467494318029f71185b42b61f1ae153afdc ]

The FT5x06 datasheet specifies a minimum reset width of 5ms and a
delay between deassertion of reset and start of reporting of 300ms.
Adjust the delays to conform to the datasheet.

With the original delays I sometimes experienced communication
timeouts when initializing the controller.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Acked-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

Showing 1 changed file with 3 additions and 3 deletions Side-by-side Diff

drivers/input/touchscreen/edt-ft5x06.c
Diff comments   View file @ 3b7cc11
... ... @@ -635,7 +635,7 @@
635 635 return error;
636 636 }
637 637  
638   - mdelay(5);
  638 + msleep(5);
639 639 gpio_set_value(tsdata->wake_pin, 1);
640 640 }
641 641 if (gpio_is_valid(tsdata->reset_pin)) {
642 642  
... ... @@ -650,9 +650,9 @@
650 650 return error;
651 651 }
652 652  
653   - mdelay(50);
  653 + msleep(5);
654 654 gpio_set_value(tsdata->reset_pin, 1);
655   - mdelay(100);
  655 + msleep(300);
656 656 }
657 657  
658 658 return 0;