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EXYNOS4210: Configure GPIO for uart

Browse Source 
This patch configures the gpio values for UART
on Origen and SMDKV310 using pinmux

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Rajeshwari Shinde 2013-07-04 12:29:16 +05:30 committed by Minkyu Kang
parent 6e50e5ca02
commit 198a40b9f6
5 changed files with 134 additions and 0 deletions
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40
arch/arm/cpu/armv7/exynos/pinmux.c
View File

@ -408,9 +408,49 @@ static int exynos4_mmc_config(int peripheral, int flags)
return 0;
}
static void exynos4_uart_config(int peripheral)
{
struct exynos4_gpio_part1 *gpio1 =
(struct exynos4_gpio_part1 *)samsung_get_base_gpio_part1();
struct s5p_gpio_bank *bank;
int i, start, count;
switch (peripheral) {
case PERIPH_ID_UART0:
bank = &gpio1->a0;
start = 0;
count = 4;
break;
case PERIPH_ID_UART1:
bank = &gpio1->a0;
start = 4;
count = 4;
break;
case PERIPH_ID_UART2:
bank = &gpio1->a1;
start = 0;
count = 4;
break;
case PERIPH_ID_UART3:
bank = &gpio1->a1;
start = 4;
count = 2;
break;
}
for (i = start; i < start + count; i++) {
s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE);
s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2));
}
}
static int exynos4_pinmux_config(int peripheral, int flags)
{
switch (peripheral) {
case PERIPH_ID_UART0:
case PERIPH_ID_UART1:
case PERIPH_ID_UART2:
case PERIPH_ID_UART3:
exynos4_uart_config(peripheral);
break;
case PERIPH_ID_I2C0:
case PERIPH_ID_I2C1:
case PERIPH_ID_I2C2:

46
board/samsung/origen/origen.c
View File

@ -25,6 +25,8 @@
#include <asm/arch/cpu.h>
#include <asm/arch/gpio.h>
#include <asm/arch/mmc.h>
#include <asm/arch/periph.h>
#include <asm/arch/pinmux.h>
DECLARE_GLOBAL_DATA_PTR;
struct exynos4_gpio_part1 *gpio1;
@ -39,6 +41,50 @@ int board_init(void)
return 0;
}
static int board_uart_init(void)
{
int err;
err = exynos_pinmux_config(PERIPH_ID_UART0, PINMUX_FLAG_NONE);
if (err) {
debug("UART0 not configured\n");
return err;
}
err = exynos_pinmux_config(PERIPH_ID_UART1, PINMUX_FLAG_NONE);
if (err) {
debug("UART1 not configured\n");
return err;
}
err = exynos_pinmux_config(PERIPH_ID_UART2, PINMUX_FLAG_NONE);
if (err) {
debug("UART2 not configured\n");
return err;
}
err = exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE);
if (err) {
debug("UART3 not configured\n");
return err;
}
return 0;
}
#ifdef CONFIG_BOARD_EARLY_INIT_F
int board_early_init_f(void)
{
int err;
err = board_uart_init();
if (err) {
debug("UART init failed\n");
return err;
}
return err;
}
#endif
int dram_init(void)
{
gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE)

46
board/samsung/smdkv310/smdkv310.c
View File

@ -26,6 +26,8 @@
#include <asm/arch/cpu.h>
#include <asm/arch/gpio.h>
#include <asm/arch/mmc.h>
#include <asm/arch/periph.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/sromc.h>
DECLARE_GLOBAL_DATA_PTR;
@ -137,3 +139,47 @@ int board_mmc_init(bd_t *bis)
return err;
}
#endif
static int board_uart_init(void)
{
int err;
err = exynos_pinmux_config(PERIPH_ID_UART0, PINMUX_FLAG_NONE);
if (err) {
debug("UART0 not configured\n");
return err;
}
err = exynos_pinmux_config(PERIPH_ID_UART1, PINMUX_FLAG_NONE);
if (err) {
debug("UART1 not configured\n");
return err;
}
err = exynos_pinmux_config(PERIPH_ID_UART2, PINMUX_FLAG_NONE);
if (err) {
debug("UART2 not configured\n");
return err;
}
err = exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE);
if (err) {
debug("UART3 not configured\n");
return err;
}
return 0;
}
#ifdef CONFIG_BOARD_EARLY_INIT_F
int board_early_init_f(void)
{
int err;
err = board_uart_init();
if (err) {
debug("UART init failed\n");
return err;
}
return err;
}
#endif

1
include/configs/origen.h
View File

@ -36,6 +36,7 @@
#define CONFIG_ARCH_CPU_INIT
#define CONFIG_DISPLAY_CPUINFO
#define CONFIG_DISPLAY_BOARDINFO
#define CONFIG_BOARD_EARLY_INIT_F
/* Keep L2 Cache Disabled */
#define CONFIG_L2_OFF 1

1
include/configs/smdkv310.h
View File

@ -36,6 +36,7 @@
#define CONFIG_ARCH_CPU_INIT
#define CONFIG_DISPLAY_CPUINFO
#define CONFIG_DISPLAY_BOARDINFO
#define CONFIG_BOARD_EARLY_INIT_F
/* Mach Type */
#define CONFIG_MACH_TYPE MACH_TYPE_SMDKV310