Forum Discussion
Altera_Forum
Honored Contributor
21 years agoUSB kernel config
Hi, We're using the Cypress SL811 host controller on our NIOS2 board. The kernel config option wasn't available until I edited the Kconfig file in the source tree (drivers/usb/host/Kcon...
Altera_Forum
Honored Contributor
21 years agoAh, gotcha.
Interesting word, "should". :-) I'm trying to add the appropriate lines to set up the resource to setup.c as follows:static struct resource sl811_resources = {
= {
.start = 0x48389D0,
.end = 0x48389D3,
.flags = IORESOURCE_MEM,
},
= {
.start = 0x48389D4,
.end = 0x48389D7,
.flags = IORESOURCE_MEM,
},
= {
.start = 7,
.end = 7,
.flags = IORESOURCE_IRQ,
}
};
static void sm3k_port_power(struct device *dev, int is_on) {
// see linux/usb_sl811.h
}
static void sm3k_hc_reset(struct device *dev) {
// see linux/usb_sl811.h
}
struct sl811_platform_data sm3k_sl811 = {
.potpg = 100,
.port_power = sm3k_port_power,
.reset = sm3k_hc_reset,
};
static struct platform_device sl811_device = {
.name = "sl811-hcd",
.id = -1,
.dev = {
.platform_data = &sm3k_sl811,
},
.num_resources = 3,
.resource = sl811_resources,
}; and then down in the setup_arch() function in arch/nios2nommu/kernel/setup.c (right before the printk("Done setup_arch\n"); I added platform_device_register(&sl811_device); But when the kernel boots, I get <div class='quotetop'>QUOTE </div> --- Quote Start --- <3>sl811-hcd: failed to claim resource 0[/b] --- Quote End ---