diff options
Diffstat (limited to 'arch/arm/mach-rockchip/rk322x/rk322x.c')
| -rw-r--r-- | arch/arm/mach-rockchip/rk322x/rk322x.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/arm/mach-rockchip/rk322x/rk322x.c b/arch/arm/mach-rockchip/rk322x/rk322x.c new file mode 100644 index 0000000000..e5250bc784 --- /dev/null +++ b/arch/arm/mach-rockchip/rk322x/rk322x.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2019 Rockchip Electronics Co., Ltd + */ +#include <asm/io.h> +#include <asm/arch-rockchip/grf_rk322x.h> +#include <asm/arch-rockchip/hardware.h> + +#ifdef CONFIG_DEBUG_UART_BOARD_INIT +void board_debug_uart_init(void) +{ +#define GRF_BASE 0x11000000 + static struct rk322x_grf * const grf = (void *)GRF_BASE; + enum { + GPIO1B2_SHIFT = 4, + GPIO1B2_MASK = 3 << GPIO1B2_SHIFT, + GPIO1B2_GPIO = 0, + GPIO1B2_UART1_SIN, + GPIO1B2_UART21_SIN, + + GPIO1B1_SHIFT = 2, + GPIO1B1_MASK = 3 << GPIO1B1_SHIFT, + GPIO1B1_GPIO = 0, + GPIO1B1_UART1_SOUT, + GPIO1B1_UART21_SOUT, + }; + enum { + CON_IOMUX_UART2SEL_SHIFT = 8, + CON_IOMUX_UART2SEL_MASK = 1 << CON_IOMUX_UART2SEL_SHIFT, + CON_IOMUX_UART2SEL_2 = 0, + CON_IOMUX_UART2SEL_21, + }; + + /* Enable early UART2 channel 1 on the RK322x */ + rk_clrsetreg(&grf->gpio1b_iomux, + GPIO1B1_MASK | GPIO1B2_MASK, + GPIO1B2_UART21_SIN << GPIO1B2_SHIFT | + GPIO1B1_UART21_SOUT << GPIO1B1_SHIFT); + /* Set channel C as UART2 input */ + rk_clrsetreg(&grf->con_iomux, + CON_IOMUX_UART2SEL_MASK, + CON_IOMUX_UART2SEL_21 << CON_IOMUX_UART2SEL_SHIFT); +} +#endif |