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ARM: imx: imx27: Introduce and use UART_BASE_ADDR(n)

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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>
This commit is contained in:
Marek Vasut 2022-04-24 23:44:04 +02:00 committed by Stefano Babic
parent 52b6b480db
commit be23774ed1
2 changed files with 19 additions and 7 deletions
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24
arch/arm/include/asm/arch-mx27/imx-regs.h
View File

@ -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)

2
include/configs/imx27lite-common.h
View File

@ -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