This properly configures the mux to enable the right UART depending on
the setting of CONFIG_SERIALX.
This also fixes things so that we don't configure balls XUCTSN_1 and
XURTSN_1 as UART1 configuration (RTS/CTS), since they aren't
connected.
Signed-off-by: Doug Anderson <diand...@chromium.org>
---
board/samsung/smdk5250/smdk5250.c | 49 +++++++++++++++++++++++++++++++++++-
1 files changed, 47 insertions(+), 2 deletions(-)
diff --git a/board/samsung/smdk5250/smdk5250.c
b/board/samsung/smdk5250/smdk5250.c
index 928c08f..61b8634 100644
--- a/board/samsung/smdk5250/smdk5250.c
+++ b/board/samsung/smdk5250/smdk5250.c
@@ -224,11 +224,56 @@ static void board_uart_init(void)
(struct exynos5_gpio_part1 *) samsung_get_base_gpio_part1();
int i;
- /* UART1 GPIOs (part1) : GPA0CON[7:4] 0x2222 */
- for (i = 4; i < 8; i++) {
+#if defined(CONFIG_SERIAL0)
+ /*
+ * UART0 GPIOs : GPA0CON[3:0] 0x2222
+ * Must set CFG17 switches to select UART0 to use.
+ */
+ for (i = 0; i <= 3; i++) {
s5p_gpio_set_pull(&gpio1->a0, i, GPIO_PULL_NONE);
s5p_gpio_cfg_pin(&gpio1->a0, i, GPIO_FUNC(0x2));
}
+#elif defined(CONFIG_SERIAL1)
+ /*
+ * UART1 GPIOs : GPA0CON[5:4] 0x22
+ * Must set CFG17 switches to select UART1 to use.
+ *
+ * This only sets RXD/TXD, as RTS/CTS need a resister soldered down
+ * in order to use them (so that those pins can be used for I2C).
+ */
+ for (i = 4; i <= 5; i++) {
+ s5p_gpio_set_pull(&gpio1->a0, i, GPIO_PULL_NONE);
+ s5p_gpio_cfg_pin(&gpio1->a0, i, GPIO_FUNC(0x2));
+ }
+#elif defined(CONFIG_SERIAL2)
+ /*
+ * UART2 GPIOs : GPA1CON[1:0] 0x22
+ * Must set CFG17 switches to select UART2 to use.
+ *
+ * This only sets RXD/TXD, as RTS/CTS need a resister soldered down
+ * in order to use them (so that those pins can be used for I2C).
+ */
+ for (i = 0; i <= 1; i++) {
+ s5p_gpio_set_pull(&gpio1->a1, i, GPIO_PULL_NONE);
+ s5p_gpio_cfg_pin(&gpio1->a1, i, GPIO_FUNC(0x2));
+ }
+#elif defined(CONFIG_SERIAL3)
+ /*
+ * UART3 GPIOs : GPA1CON[5:4] 0x22
+ * Must set CFG16 switches to select UART3 to use.
+ */
+ for (i = 4; i <= 5; i++) {
+ s5p_gpio_set_pull(&gpio1->a1, i, GPIO_PULL_NONE);
+ s5p_gpio_cfg_pin(&gpio1->a1, i, GPIO_FUNC(0x2));
+ }
+#elif defined(CONFIG_SERIAL4)
+ /*
+ * There's no mux for UART4--it's internal only
+ */
+#error "Can't set console to serial 4--it's not exposed"
+#else
+#error "Unknown serial config"
+#endif
}
#ifdef CONFIG_BOARD_EARLY_INIT_F
--
1.7.7.3
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