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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-07-15 13:03:12 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-08-14 14:58:15 +1000
commit309257484cc1a592e8ac5fbdd8cd661be2b80bf8 (patch)
treedf500d08cef6def1e1a2f6ef51e6e91c563c2c08 /arch/powerpc/include/asm/udbg.h
parent3fafe9c202321a3edc47386d2071af89555c9f45 (diff)
downloadlinux-309257484cc1a592e8ac5fbdd8cd661be2b80bf8.tar.bz2
powerpc: Cleanup udbg_16550 and add support for LPC PIO-only UARTs
The udbg_16550 code, which we use for our early consoles and debug backends was fairly messy. Especially for the debug consoles, it would re-implement the "high level" getc/putc/poll functions for each access method. It also had code to configure the UART but only for the straight MMIO method. This changes it to instead abstract at the register accessor level, and have the various functions and configuration routines use these. The result is simpler and slightly smaller code, and free support for non-MMIO mapped PIO UARTs, which such as the ones that can be present on a POWER 8 LPC bus. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/udbg.h')
-rw-r--r--arch/powerpc/include/asm/udbg.h9
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/udbg.h b/arch/powerpc/include/asm/udbg.h
index dc590919f8eb..b51fba10e733 100644
--- a/arch/powerpc/include/asm/udbg.h
+++ b/arch/powerpc/include/asm/udbg.h
@@ -27,10 +27,11 @@ extern void udbg_printf(const char *fmt, ...)
__attribute__ ((format (printf, 1, 2)));
extern void udbg_progress(char *s, unsigned short hex);
-extern void udbg_init_uart(void __iomem *comport, unsigned int speed,
- unsigned int clock);
-extern unsigned int udbg_probe_uart_speed(void __iomem *comport,
- unsigned int clock);
+extern void udbg_uart_init_mmio(void __iomem *addr, unsigned int stride);
+extern void udbg_uart_init_pio(unsigned long port, unsigned int stride);
+
+extern void udbg_uart_setup(unsigned int speed, unsigned int clock);
+extern unsigned int udbg_probe_uart_speed(unsigned int clock);
struct device_node;
extern void udbg_scc_init(int force_scc);