On Thursday 09 October 2008, Steven A. Falco wrote:
> This patch adds support for the GPIO functions of PPC40x and PPC44x
> SOCs.
Thanks. Tested successfully on 405EP board.
I only have one comment below left.
> Signed-off-by: Steve Falco <sfalco at harris.com>
> ---
>
> I looked more closely at the datasheet. Stefan is correct that the
> shadow registers are not needed for these processors, because they have
> separate registers for input and output.
>
> I've incorporated the other changes, with one exception. I want
> ppc4xx_gpio_get() to return 0 or 1 (rather than Anton's comment that any
> non-zero value is ok), because when you use the new "export feature" in
> sysfs, you see the raw value returned from ppc4xx_gpio_get(). So, without
> the !! in the return statement, you would see a strange value, like 32768
> instead of 1:
>
> # cd gpio208
> # cat value
> 32768
>
> So, I think it is worth sanitizing the return value here.
<snip>
> +static int __init ppc4xx_add_gpiochips(void)
> +{
> + struct device_node *np;
> +
> + for_each_compatible_node(np, NULL, "amcc,ppc4xx-gpio") {
Since the GPIO IP-core implementation is from IBM and not AMCC I suggest to
use a different compatible property:
for_each_compatible_node(np, NULL, "ibm,ppc4xx-gpio") {
Other than this:
Acked-by: Stefan Roese <[EMAIL PROTECTED]>
Best regards,
Stefan
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