@@ -150,6 +150,17 @@ int of_gpio_simple_xlate(struct of_gpio_chip
*of_gc, struct device_node *np,
}
EXPORT_SYMBOL(of_gpio_simple_xlate);
+static int of_mm_gpio_to_irq(struct gpio_chip *gc, unsigned int gpio)
+{
+ struct of_mm_gpio_chip *mm_gc;
+ struct of_gpio_chip *of_gc;
+
+ of_gc = container_of(gc, struct of_gpio_chip, gc);
+ mm_gc = container_of(of_gc, struct of_mm_gpio_chip, of_gc);
+ return mm_gc->irq;
+
+}
+
/**
* of_mm_gpiochip_add - Add memory mapped GPIO chip (bank)
* @np: device node of the GPIO chip
@@ -188,6 +199,9 @@ int of_mm_gpiochip_add(struct device_node *np,
gc->base = -1;
+ mm_gc->irq = irq_of_parse_and_map(np, 0);
+ gc->to_irq = of_mm_gpio_to_irq;
+
if (!of_gc->xlate)
of_gc->xlate = of_gpio_simple_xlate;
@@ -54,6 +54,7 @@ struct of_mm_gpio_chip {
struct of_gpio_chip of_gc;
void (*save_regs)(struct of_mm_gpio_chip *mm_gc);
void __iomem *regs;
+ int irq;
};
static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc)
Hello, I have an SPI device that sends an IRQ to the CPU (MPC5200) via GPIO (GPT6): gpt6: timer@660 { // General Purpose Timer GPT6 in GPIO mode for SMC4000IO sample irq. compatible = "fsl,mpc5200b-gpt-gpio","fsl,mpc5200-gpt-gpio"; cell-index = <6>; reg = <0x660 0x10>; interrupts = <1 15 0>; interrupt-parent = <&mpc5200_pic>; gpio-controller; #gpio-cells = <2>; }; spi@f00 { #address-cells = <1>; #size-cells = <0>; compatible = "fsl,mpc5200b-spi","fsl,mpc5200-spi"; reg = <0xf00 0x20>; interrupts = <2 13 0 2 14 0>; interrupt-parent = <&mpc5200_pic>; gpios = <&gpt4 0 0>; io-controller@0 { compatible = "microkey,smc4000io"; linux,modalias = "of_smc4000io"; spi-max-frequency = <1000000>; spi-cpha; reg = <0>; // gpios: first is IRQ to cpu gpios = <&gpt6 0 0>; word-delay-us = <0>; }; }; I've got it working for a mm_gpio, but it's probably not the right approach, I have the following questions to get to the right solution: - Should gpiolib's gpio_to_irq function indeed return the IRQ that was specified at the GPIO by the DTS (interrupts = <1 15 0>)? The effect is that if the IRQ is not specified in the DTS the gpio_to_irq returns NO_IRQ. (On the MPC5200 the IRQ is fixed for GPT6, so instead the cell-index could also be used to return a gpio's IRQ) - If a GPIO controller supports several GPIOs but one IRQ, is it defined what gpio_to_irq should return? - Is it okay for gpio_to_irq to return NO_IRQ? (returned by irq_of_parse_and_map) if irq is not defined? Henk.