diff options
Diffstat (limited to 'arch/arm/mach-nomadik/cpu-8815.c')
| -rw-r--r-- | arch/arm/mach-nomadik/cpu-8815.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm/mach-nomadik/cpu-8815.c b/arch/arm/mach-nomadik/cpu-8815.c index 3a59459d6e9a..339496f15138 100644 --- a/arch/arm/mach-nomadik/cpu-8815.c +++ b/arch/arm/mach-nomadik/cpu-8815.c @@ -31,9 +31,11 @@ #include <linux/pinctrl/machine.h> #include <linux/platform_data/clocksource-nomadik-mtu.h> #include <linux/of_irq.h> +#include <linux/of_gpio.h> #include <linux/of_address.h> #include <linux/of_platform.h> #include <linux/mtd/fsmc.h> +#include <linux/gpio.h> #include <mach/hardware.h> #include <mach/irqs.h> @@ -263,6 +265,38 @@ static struct fsmc_nand_platform_data cpu8815_nand_data = { .nand_timings = &cpu8815_nand_timings, }; +/* + * The SMSC911x IRQ is connected to a GPIO pin, but the driver expects + * to simply request an IRQ passed as a resource. So the GPIO pin needs + * to be requested by this hog and set as input. + */ +static int __init cpu8815_eth_init(void) +{ + struct device_node *eth; + int gpio, irq, err; + + eth = of_find_node_by_path("/usb-s8815/ethernet-gpio"); + if (!eth) { + pr_info("could not find any ethernet GPIO\n"); + return 0; + } + gpio = of_get_gpio(eth, 0); + err = gpio_request(gpio, "eth_irq"); + if (err) { + pr_info("failed to request ethernet GPIO\n"); + return -ENODEV; + } + err = gpio_direction_input(gpio); + if (err) { + pr_info("failed to set ethernet GPIO as input\n"); + return -ENODEV; + } + irq = gpio_to_irq(gpio); + pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq); + return 0; +} +device_initcall(cpu8815_eth_init); + /* These are mostly to get the right device names for the clock lookups */ static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = { OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO0_BASE, |