From 3f97d5fcf99cb87f590ffe1d9422b2a26a8ef3ed Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Fri, 26 Sep 2014 14:19:52 +0200 Subject: gpio: handle also nested irqchips in the chained handler set-up To unify how we connect cascaded IRQ chips to parent IRQs, if NULL us passed as handler to the gpiochip_set_chained_irqchip() function, assume the chips is nested rather than chained, and we still get the parent set up correctly by way of this function call. Alter the drivers for tc3589x and stmpe to use this to set up their chained handlers as a demonstration of the usage. Signed-off-by: Linus Walleij --- Documentation/gpio/driver.txt | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'Documentation/gpio') diff --git a/Documentation/gpio/driver.txt b/Documentation/gpio/driver.txt index 23b751a10d7b..31e0b5db55d8 100644 --- a/Documentation/gpio/driver.txt +++ b/Documentation/gpio/driver.txt @@ -124,7 +124,8 @@ symbol: * gpiochip_set_chained_irqchip(): sets up a chained irq handler for a gpio_chip from a parent IRQ and passes the struct gpio_chip* as handler data. (Notice handler data, since the irqchip data is likely used by the - parent irqchip!) This is for the chained type of chip. + parent irqchip!) This is for the chained type of chip. This is also used + to set up a nested irqchip if NULL is passed as handler. To use the helpers please keep the following in mind: -- cgit v1.2.3