The RK3399-Q7 ("Puma") SoM exposes UART0 as the Qseven UART (i.e. the serial line available via standardised pins on the edge connector and available on a RS232 connector).
To support boards (such as the RK3399-Q7) that require UART0 as a debug console, we match CONFIG_DEBUG_UART_BASE and add the appropriate iomux setup to the rk3399 SPL code.
As we are already touching this code, we also move the board-specific UART setup (i.e. iomux setup) into board_debug_uart_init(). This will be called from the debug UART init when CONFIG_DEBUG_UART_BOARD_INIT is set.
Signed-off-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com ---
Changes in v2: - Changed hex constant to lowercase
arch/arm/include/asm/arch-rockchip/grf_rk3399.h | 8 +++++++ arch/arm/mach-rockchip/rk3399-board-spl.c | 29 ++++++++++++++++++------- 2 files changed, 29 insertions(+), 8 deletions(-)
diff --git a/arch/arm/include/asm/arch-rockchip/grf_rk3399.h b/arch/arm/include/asm/arch-rockchip/grf_rk3399.h index 62d8496..4701cfb 100644 --- a/arch/arm/include/asm/arch-rockchip/grf_rk3399.h +++ b/arch/arm/include/asm/arch-rockchip/grf_rk3399.h @@ -333,6 +333,14 @@ enum { GRF_GPIO2B4_SEL_MASK = 3 << GRF_GPIO2B4_SEL_SHIFT, GRF_SPI2TPM_CSN0 = 1,
+ /* GRF_GPIO2C_IOMUX */ + GRF_GPIO2C0_SEL_SHIFT = 0, + GRF_GPIO2C0_SEL_MASK = 3 << GRF_GPIO2C0_SEL_SHIFT, + GRF_UART0BT_SIN = 1, + GRF_GPIO2C1_SEL_SHIFT = 2, + GRF_GPIO2C1_SEL_MASK = 3 << GRF_GPIO2C1_SEL_SHIFT, + GRF_UART0BT_SOUT = 1, + /* GRF_GPIO3A_IOMUX */ GRF_GPIO3A4_SEL_SHIFT = 8, GRF_GPIO3A4_SEL_MASK = 3 << GRF_GPIO3A4_SEL_SHIFT, diff --git a/arch/arm/mach-rockchip/rk3399-board-spl.c b/arch/arm/mach-rockchip/rk3399-board-spl.c index 7b4e0a1..c212143 100644 --- a/arch/arm/mach-rockchip/rk3399-board-spl.c +++ b/arch/arm/mach-rockchip/rk3399-board-spl.c @@ -57,19 +57,22 @@ void secure_timer_init(void) writel(TIMER_EN | TIMER_FMODE, TIMER_CHN10_BASE + TIMER_CONTROL_REG); }
-#define GRF_EMMCCORE_CON11 0xff77f02c -void board_init_f(ulong dummy) +void board_debug_uart_init(void) { - struct udevice *pinctrl; - struct udevice *dev; - int ret; - - /* Example code showing how to enable the debug UART on RK3288 */ #include <asm/arch/grf_rk3399.h> - /* Enable early UART2 channel C on the RK3399 */ #define GRF_BASE 0xff770000 struct rk3399_grf_regs * const grf = (void *)GRF_BASE;
+#if defined(CONFIG_DEBUG_UART_BASE) && (CONFIG_DEBUG_UART_BASE == 0xff180000) + /* Enable early UART0 on the RK3399 */ + rk_clrsetreg(&grf->gpio2c_iomux, + GRF_GPIO2C0_SEL_MASK, + GRF_UART0BT_SIN << GRF_GPIO2C0_SEL_SHIFT); + rk_clrsetreg(&grf->gpio2c_iomux, + GRF_GPIO2C1_SEL_MASK, + GRF_UART0BT_SOUT << GRF_GPIO2C1_SEL_SHIFT); +#else + /* Enable early UART2 channel C on the RK3399 */ rk_clrsetreg(&grf->gpio4c_iomux, GRF_GPIO4C3_SEL_MASK, GRF_UART2DGBC_SIN << GRF_GPIO4C3_SEL_SHIFT); @@ -80,6 +83,16 @@ void board_init_f(ulong dummy) rk_clrsetreg(&grf->soc_con7, GRF_UART_DBG_SEL_MASK, GRF_UART_DBG_SEL_C << GRF_UART_DBG_SEL_SHIFT); +#endif +} + +#define GRF_EMMCCORE_CON11 0xff77f02c +void board_init_f(ulong dummy) +{ + struct udevice *pinctrl; + struct udevice *dev; + int ret; + #define EARLY_UART #ifdef EARLY_UART /*