Hammer Uart2 Configuration

From eLinux.org
Revision as of 08:48, 14 May 2011 by Jsujjava (talk | contribs) (Change to Category TCT-Hammer)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

The default configuration for the GPH6 and GPH7 pins on the s3c2410 are as GPIO inputs. To configure these pins for usage as a second uart add the following commented section to the arch/arm/mach-s3c2410/mach-tct_hammer.c in the linux source tree, future versions of the Hammer kernel source will include this entry:

static void __init tct_hammer_init(void)

	s3c2410_gpio_cfgpin(S3C2410_GPF0, S3C2410_GPIO_OUTPUT);
	s3c2410_gpio_setpin(S3C2410_GPF0, 1);

	s3c2410_gpio_cfgpin(S3C2410_GPC12, S3C2410_GPIO_OUTPUT);
	s3c2410_gpio_setpin(S3C2410_GPC12, 1);

/* uncomment these to enable the second serial port */
	s3c2410_gpio_cfgpin(S3C2410_GPH6, S3C2410_GPH6_TXD2);
	s3c2410_gpio_pullup(S3C2410_GPH6, 1);
	s3c2410_gpio_cfgpin(S3C2410_GPH7, S3C2410_GPH7_RXD2);
	s3c2410_gpio_pullup(S3C2410_GPH7, 1);
#ifdef CONFIG_FB_S3C2410
	platform_add_devices(tct_hammer_devices, ARRAY_SIZE(tct_hammer_devices));

after recompiling the kernel and loading it onto the Hammer, the port will be accessable via /dev/ttySAC2.