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ARM: imx: imx31: Introduce and use UART_BASE_ADDR(n)
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>
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@ -598,6 +598,18 @@ struct esdc_regs {
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#define UART4_BASE 0x43FB0000
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#define UART5_BASE 0x43FB4000
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#define UART_BASE_ADDR(n) ( \
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!!sizeof(struct { \
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static_assert((n) >= 1 && (n) <= 5); \
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int pad; \
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}) * ( \
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(n) == 1 ? UART1_BASE : \
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(n) == 2 ? UART2_BASE : \
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(n) == 3 ? UART3_BASE : \
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(n) == 4 ? UART4_BASE : \
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UART5_BASE_ADDR) \
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)
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#define I2C1_BASE_ADDR 0x43f80000
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#define I2C1_CLK_OFFSET 26
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#define I2C2_BASE_ADDR 0x43F98000
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