| Message ID | 20161124102529.20212-4-stephen.boyd@linaro.org |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index ecad3f0e3b77..3117397c4c41 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -71,8 +71,9 @@ struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np, struct gpio_desc *desc; int ret; - ret = of_parse_phandle_with_args(np, propname, "#gpio-cells", index, - &gpiospec); + ret = of_parse_phandle_with_args_map(np, propname, "#gpio-cells", + "gpio-map", "gpio-map-mask", + index, &gpiospec); if (ret) { pr_debug("%s: can't parse '%s' property of node '%s[%d]'\n", __func__, propname, np->full_name, index);
Platforms like 96boards have a standardized connector/expansion slot that exposes signals like GPIOs to expansion boards in an SoC agnostic way. We'd like the DT overlays for the expansion boards to be written once without knowledge of the SoC on the other side of the connector. This avoids the unscalable combinatorial explosion of a different DT overlay for each expansion board and SoC pair. Now that we have nexus support in the OF core let's change the function call here that parses the phandle lists of gpios to use the nexus variant. This allows us to remap phandles and their arguments through any number of nexus nodes and end up with the actual gpio provider being used. Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Mark Brown <broonie@kernel.org> Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> --- TODO: Document gpio-map and gpio-map-mask in GPIO devicetree binding drivers/gpio/gpiolib-of.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) -- 2.10.0.297.gf6727b0 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html