MIPS: boot: Fixes for compressed/uart-16550.c (d6a50784) · Commits · 戴 / test

Fix uart-16550.c for adding XLR/XLP support, changes are: * Make register read/write use volatile pointers * Support 32 bit IO read/write * Increase timeout in waiting for UART LSR Signed-off-by:

Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5416/ Signed-off-by:

Ralf Baechle <ralf@linux-mips.org>

arch/mips/boot/compressed/uart-16550.c

+7 −3

Original line number	Diff line number	Diff line
		@@ -23,23 +23,27 @@
		#define PORT(offset) (UART0_BASE + (4 * offset))
		#endif

		#ifndef IOTYPE
		#define IOTYPE char
		#endif

		#ifndef PORT
		#error please define the serial port address for your own machine
		#endif

		static inline unsigned int serial_in(int offset)
		{
		return ((char )PORT(offset));
		return ((volatile IOTYPE )PORT(offset)) & 0xFF;
		}

		static inline void serial_out(int offset, int value)
		{
		((char )PORT(offset)) = value;
		((volatile IOTYPE )PORT(offset)) = value & 0xFF;
		}

		void putc(char c)
		{
		int timeout = 1024;
		int timeout = 1000000;

		while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
		;

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