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gpio: mxs: add name_to_gpio() function

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Override the default name_to_gpio() function with one that
accepts strings of the form bank:pin.  If a colon is present
in the provided name, it behaves like the default version.

This lets the "gpio" command work with sane names rather than
requiring the user to enter the bank/pin composite in decimal.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Måns Rullgård 2015-12-15 22:27:57 +00:00 • committed by Stefano Babic
parent fcbe8c5674
commit 88f91d1375
1 changed files with 15 additions and 0 deletions
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15
drivers/gpio/mxs_gpio.c
View file

@ -114,3 +114,18 @@ int gpio_free(unsigned gpio)
{
return 0;
}
int name_to_gpio(const char *name)
{
unsigned bank, pin;
char *end;
bank = simple_strtoul(name, &end, 10);
if (!*end || *end != ':')
return bank;
pin = simple_strtoul(end + 1, NULL, 10);
return (bank << MXS_PAD_BANK_SHIFT) | (pin << MXS_PAD_PIN_SHIFT);
}