[PATCH] gpio: omap: fix debounce time calculation
grygorii.strashko at ti.com
Thu Nov 12 11:28:28 PST 2015
On 11/12/2015 08:09 PM, Felipe Balbi wrote:
> Grygorii Strashko <grygorii.strashko at ti.com> writes:
>> On 11/12/2015 07:50 PM, Felipe Balbi wrote:
>>> According to TRM, debounce is measured in periods of
>>> the functional clock of the GPIO IP. This means that
>> What TRM? link pls.
>> 18.104.22.168 GPIO_DEBOUNCINGTIME Register (offset = 154h) [reset = 0h]
>> The GPIO_DEBOUNCINGTIME register controls debouncing time (the value is
>> global for all ports). The debouncing cell is running with the
>> debouncing clock (32 kHz), this register represents the number of the
>> clock cycle(s) (31 s long) to be used.
>> Debouncing Value in 31 microsecond steps.
>> Debouncing Value = (DEBOUNCETIME + 1) * 31 microseconds.
> 8-bit values specifying the debouncing time. It is n-
> periods of the muxed clock, which can come from either
> a true 32k oscillator/pad of from the system clock. It
> depends on which boot mode is selected. For more
> information see Chapter 32, Initialization.
27.4.3 General-Purpose Interface Clock Configuration
This completely unclear. Sry, I think this patch can't be used as is,
first of all because of backward compatibility issues.
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