rockchip: rk3368: support UART2/4 in board_debug_uart_init()

evb-rk3368 is using UART2 and PX5 evb is using UART4

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Tested-by: Andy Yan <andy.yan@rock-chips.com>

diff --git a/arch/arm/mach-rockchip/rk3368/rk3368.c b/arch/arm/mach-rockchip/rk3368/rk3368.c
index 1ed06c5..f06d277 100644 (file)
--- a/arch/arm/mach-rockchip/rk3368/rk3368.c
+++ b/arch/arm/mach-rockchip/rk3368/rk3368.c
@@ -124,6 +124,46 @@ void board_debug_uart_init(void)
                     GPIO2D0_MASK, GPIO2D0_UART0_SIN);
        rk_clrsetreg(&grf->gpio2d_iomux,
                     GPIO2D1_MASK, GPIO2D1_UART0_SOUT);
+#elif defined(CONFIG_DEBUG_UART_BASE) && (CONFIG_DEBUG_UART_BASE == 0xff1c0000)
+       struct rk3368_pmu_grf * const pmugrf __maybe_unused =
+               (struct rk3368_pmu_grf * const)0xff738000;
+
+       enum {
+               /* UART4 */
+               GPIO0D2_MASK            = GENMASK(5, 4),
+               GPIO0D2_GPIO            = 0,
+               GPIO0D2_UART4_SOUT      = (3 << 4),
+
+               GPIO0D3_MASK            = GENMASK(7, 6),
+               GPIO0D3_GPIO            = 0,
+               GPIO0D3_UART4_SIN       = (3 << 6),
+       };
+
+       /* Enable early UART4 on the PX5 */
+       rk_clrsetreg(&pmugrf->gpio0d_iomux,
+                    GPIO0D2_MASK | GPIO0D3_MASK,
+                    GPIO0D2_UART4_SOUT | GPIO0D3_UART4_SIN);
+#elif defined(CONFIG_DEBUG_UART_BASE) && (CONFIG_DEBUG_UART_BASE == 0xff690000)
+       struct rk3368_grf * const grf =
+               (struct rk3368_grf * const)0xff770000;
+
+       enum {
+               GPIO2A6_SHIFT           = 12,
+               GPIO2A6_MASK            = GENMASK(13, 12),
+               GPIO2A6_GPIO            = 0,
+               GPIO2A6_UART2_SIN       = (2 << GPIO2A6_SHIFT),
+
+               GPIO2A5_SHIFT           = 10,
+               GPIO2A5_MASK            = GENMASK(11, 10),
+               GPIO2A5_GPIO            = 0,
+               GPIO2A5_UART2_SOUT      = (2 << GPIO2A5_SHIFT),
+       };
+
+       /* Enable early UART2 on the RK3368 */
+       rk_clrsetreg(&grf->gpio2a_iomux,
+                    GPIO2A6_MASK, GPIO2A6_UART2_SIN);
+       rk_clrsetreg(&grf->gpio2a_iomux,
+                    GPIO2A5_MASK, GPIO2A5_UART2_SOUT);
 #endif
 }
 #endif