Gabe Black (gabeblack@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3573 -gerrit commit 1b940726e0b8eff3d90e2c9a2e7724f0495cdfc3 Author: Gabe Black <gabeblack@chromium.org> Date: Sat Jun 29 23:20:14 2013 -0700 beaglebone: Enable the clocks and pins for the configured UART. Set up the pinmux to enable the pins and the clocks for whichever UART is currently configured. Change-Id: Iac13f16d9d84320555b99734ea83eafd0a2803fe Signed-off-by: Gabe Black <gabeblack@chromium.org> --- src/mainboard/ti/beaglebone/bootblock.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/src/mainboard/ti/beaglebone/bootblock.c b/src/mainboard/ti/beaglebone/bootblock.c index fbe73ea..6c7d132 100644 --- a/src/mainboard/ti/beaglebone/bootblock.c +++ b/src/mainboard/ti/beaglebone/bootblock.c @@ -21,10 +21,13 @@ #include <types.h> #include <uart.h> #include <console/console.h> +#include <cpu/ti/am335x/pinmux.h> void bootblock_mainboard_init(void); void bootblock_mainboard_init(void) { + void *uart_clock_ctrl = NULL; + /* Enable the GPIO module */ writel((0x2 << 0) | (1 << 18), (uint32_t *)(0x44e00000 + 0xac)); @@ -38,6 +41,29 @@ void bootblock_mainboard_init(void) clrbits_le32((uint32_t *)(0x4804c000 + 0x13c), 0xf << 21); setbits_le32((uint32_t *)(0x4804c000 + 0x13c), 0x5 << 21); + /* Set up the UART we're going to use */ + if (CONFIG_CONSOLE_SERIAL_UART0) { + am335x_pinmux_uart0(); + uart_clock_ctrl = (void *)(uintptr_t)(0x44e00400 + 0xb4); + } else if (CONFIG_CONSOLE_SERIAL_UART1) { + am335x_pinmux_uart1(); + uart_clock_ctrl = (void *)(uintptr_t)(0x44e00000 + 0x6c); + } else if (CONFIG_CONSOLE_SERIAL_UART2) { + am335x_pinmux_uart2(); + uart_clock_ctrl = (void *)(uintptr_t)(0x44e00000 + 0x70); + } else if (CONFIG_CONSOLE_SERIAL_UART3) { + am335x_pinmux_uart3(); + uart_clock_ctrl = (void *)(uintptr_t)(0x44e00000 + 0x74); + } else if (CONFIG_CONSOLE_SERIAL_UART4) { + am335x_pinmux_uart4(); + uart_clock_ctrl = (void *)(uintptr_t)(0x44e00000 + 0x78); + } else if (CONFIG_CONSOLE_SERIAL_UART5) { + am335x_pinmux_uart5(); + uart_clock_ctrl = (void *)(uintptr_t)(0x44e00000 + 0x38); + } + if (uart_clock_ctrl) + writel(0x2, uart_clock_ctrl); + /* Start monotonic timer */ //rtc_start();