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Commit 5079df99 authored May 21, 2007 by Mike Frysinger Committed by Linus Torvalds May 21, 2007

Blackfin arch: document why we have to touch the UART peripheral in our boot up code



Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent ef9256d2

arch/blackfin/mach-bf533/head.S

+2 −1

Original line number	Diff line number	Diff line
		@@ -173,7 +173,8 @@ ENTRY(__stext)
		STI R2;
		#endif

		/* Initialise UART */
		/* Initialise UART - when booting from u-boot, the UART is not disabled
		* so if we dont initalize here, our serial console gets hosed */
		p0.h = hi(UART_LCR);
		p0.l = lo(UART_LCR);
		r0 = 0x0(Z);

arch/blackfin/mach-bf537/head.S

+2 −1

Original line number	Diff line number	Diff line
		@@ -181,7 +181,8 @@ ENTRY(__stext)
		SSYNC;
		#endif

		/Initialise UART/
		/* Initialise UART - when booting from u-boot, the UART is not disabled
		* so if we dont initalize here, our serial console gets hosed */
		p0.h = hi(UART_LCR);
		p0.l = lo(UART_LCR);
		r0 = 0x0(Z);

arch/blackfin/mach-bf561/head.S

+2 −1

Original line number	Diff line number	Diff line
		@@ -127,7 +127,8 @@ ENTRY(__stext)
		STI R2;
		#endif

		/* Initialise UART*/
		/* Initialise UART - when booting from u-boot, the UART is not disabled
		* so if we dont initalize here, our serial console gets hosed */
		p0.h = hi(UART_LCR);
		p0.l = lo(UART_LCR);
		r0 = 0x0(Z);