Commit 060f3ebf authored by Michal Simek's avatar Michal Simek Committed by Linus Walleij

gpio: zynq: Setup chip->base based on alias ID

In past Xilinx gpio-zynq driver was setting up gpio chip->base as 0
which was chagned to autodetection when driver was upstreamed. Older
systems, which were using this old version, setup SW stack which expects
zynq gpio base as 0 and right now there is no way how to set this up.

The patch is adding an option to setup chip->base based on aliases which
is something what some other drivers are doing too.
It means when gpio0 alias is setup then chip->base is 0. When gpio alias
is not setup gpiochip_find_base() set it up properly which is current
behavior.
Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent da069d5d
...@@ -827,7 +827,7 @@ static int zynq_gpio_probe(struct platform_device *pdev) ...@@ -827,7 +827,7 @@ static int zynq_gpio_probe(struct platform_device *pdev)
chip->free = zynq_gpio_free; chip->free = zynq_gpio_free;
chip->direction_input = zynq_gpio_dir_in; chip->direction_input = zynq_gpio_dir_in;
chip->direction_output = zynq_gpio_dir_out; chip->direction_output = zynq_gpio_dir_out;
chip->base = -1; chip->base = of_alias_get_id(pdev->dev.of_node, "gpio");
chip->ngpio = gpio->p_data->ngpio; chip->ngpio = gpio->p_data->ngpio;
/* Retrieve GPIO clock */ /* Retrieve GPIO clock */
......
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