[U-Boot] [PATCH 1/8] rockchip: rk3368: support UART2/4 in board_debug_uart_init()

[Andy Yan]

Kever Yang <kever.yang at rock-chips.com> 于2019年3月29日周五 下午10:54写道：

> evb-rk3368 is using UART2 and PX5 evb is using UART4
>
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> ---
>
>  arch/arm/mach-rockchip/rk3368/rk3368.c | 40 ++++++++++++++++++++++++++
>  1 file changed, 40 insertions(+)
>
>
Tested-by: Andy Yan <andy.yan at rock-chips.com>


> diff --git a/arch/arm/mach-rockchip/rk3368/rk3368.c
> b/arch/arm/mach-rockchip/rk3368/rk3368.c
> index 1ed06c5352..f06d27717d 100644
> --- 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
> --
> 2.20.1
>
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