Introduce helper macro UART_BASE_ADDR(n), which returns Nth UART base address. Convert all board configurations to this new macro. This is the first step toward switching CONFIG_MXC_UART_BASE to Kconfig. This is a clean up, no functional change.
The new macro contains compile-time test to verify N is in suitable range. The test works such that it multiplies constant N by constant double-negation of size of a non-empty structure, i.e. it multiplies constant N by constant 1 in each successful compilation case.
The non-empty structure may contain C11 _Static_assert(), make use of this and place the kernel variant of static assert in there, so that it performs the compile-time check for N in the correct range. Note that it is not possible to directly use static_assert in compound statements, hence this convoluted construct.
Signed-off-by: Marek Vasut marex@denx.de Cc: Fabio Estevam festevam@denx.de Cc: Peng Fan peng.fan@nxp.com Cc: Stefano Babic sbabic@denx.de --- arch/arm/include/asm/arch-mx27/imx-regs.h | 24 +++++++++++++++++------ include/configs/imx27lite-common.h | 2 +- 2 files changed, 19 insertions(+), 7 deletions(-)
diff --git a/arch/arm/include/asm/arch-mx27/imx-regs.h b/arch/arm/include/asm/arch-mx27/imx-regs.h index d39f6b03508..77794d7d03d 100644 --- a/arch/arm/include/asm/arch-mx27/imx-regs.h +++ b/arch/arm/include/asm/arch-mx27/imx-regs.h @@ -179,16 +179,16 @@ struct fuse_bank0_regs { #define IMX_TIM2_BASE (0x04000 + IMX_IO_BASE) #define IMX_TIM3_BASE (0x05000 + IMX_IO_BASE) #define IMX_RTC_BASE (0x07000 + IMX_IO_BASE) -#define UART1_BASE (0x0a000 + IMX_IO_BASE) -#define UART2_BASE (0x0b000 + IMX_IO_BASE) -#define UART3_BASE (0x0c000 + IMX_IO_BASE) -#define UART4_BASE (0x0d000 + IMX_IO_BASE) +#define UART1_BASE_ADDR (0x0a000 + IMX_IO_BASE) +#define UART2_BASE_ADDR (0x0b000 + IMX_IO_BASE) +#define UART3_BASE_ADDR (0x0c000 + IMX_IO_BASE) +#define UART4_BASE_ADDR (0x0d000 + IMX_IO_BASE) #define I2C1_BASE_ADDR (0x12000 + IMX_IO_BASE) #define IMX_GPIO_BASE (0x15000 + IMX_IO_BASE) #define IMX_TIM4_BASE (0x19000 + IMX_IO_BASE) #define IMX_TIM5_BASE (0x1a000 + IMX_IO_BASE) -#define IMX_UART5_BASE (0x1b000 + IMX_IO_BASE) -#define IMX_UART6_BASE (0x1c000 + IMX_IO_BASE) +#define UART5_BASE_ADDR (0x1b000 + IMX_IO_BASE) +#define UART6_BASE_ADDR (0x1c000 + IMX_IO_BASE) #define I2C2_BASE_ADDR (0x1D000 + IMX_IO_BASE) #define IMX_TIM6_BASE (0x1f000 + IMX_IO_BASE) #define IMX_AIPI2_BASE (0x20000 + IMX_IO_BASE) @@ -204,6 +204,18 @@ struct fuse_bank0_regs {
#define NFC_BASE_ADDR IMX_NFC_BASE
+#define UART_BASE_ADDR(n) ( \ + !!sizeof(struct { \ + static_assert((n) >= 1 && (n) <= 6); \ + int pad; \ + }) * ( \ + (n) == 1 ? UART1_BASE_ADDR : \ + (n) == 2 ? UART2_BASE_ADDR : \ + (n) == 3 ? UART3_BASE_ADDR : \ + (n) == 4 ? UART4_BASE_ADDR : \ + (n) == 5 ? UART5_BASE_ADDR : \ + UART6_BASE_ADDR) \ + )
/* FMCR System Control bit definition*/ #define UART4_RXD_CTL (1 << 25) diff --git a/include/configs/imx27lite-common.h b/include/configs/imx27lite-common.h index bb53a33a542..6790053bb8d 100644 --- a/include/configs/imx27lite-common.h +++ b/include/configs/imx27lite-common.h @@ -70,7 +70,7 @@ /* * Serial Driver info */ -#define CONFIG_MXC_UART_BASE UART1_BASE +#define CONFIG_MXC_UART_BASE UART_BASE_ADDR(1)
/* * Flash & Environment