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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sh/boards/renesas/rts7751r2d/led.c | |
download | blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/sh/boards/renesas/rts7751r2d/led.c')
-rw-r--r-- | arch/sh/boards/renesas/rts7751r2d/led.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/sh/boards/renesas/rts7751r2d/led.c b/arch/sh/boards/renesas/rts7751r2d/led.c new file mode 100644 index 000000000000..9993259a894f --- /dev/null +++ b/arch/sh/boards/renesas/rts7751r2d/led.c @@ -0,0 +1,67 @@ +/* + * linux/arch/sh/kernel/led_rts7751r2d.c + * + * Copyright (C) Atom Create Engineering Co., Ltd. + * + * May be copied or modified under the terms of GNU General Public + * License. See linux/COPYING for more information. + * + * This file contains Renesas Technology Sales RTS7751R2D specific LED code. + */ + +#include <linux/config.h> +#include <asm/io.h> +#include <asm/rts7751r2d/rts7751r2d.h> + +extern unsigned int debug_counter; + +#ifdef CONFIG_HEARTBEAT + +#include <linux/sched.h> + +/* Cycle the LED's in the clasic Knightriger/Sun pattern */ +void heartbeat_rts7751r2d(void) +{ + static unsigned int cnt = 0, period = 0; + volatile unsigned short *p = (volatile unsigned short *)PA_OUTPORT; + static unsigned bit = 0, up = 1; + + cnt += 1; + if (cnt < period) + return; + + cnt = 0; + + /* Go through the points (roughly!): + * f(0)=10, f(1)=16, f(2)=20, f(5)=35, f(int)->110 + */ + period = 110 - ((300 << FSHIFT)/((avenrun[0]/5) + (3<<FSHIFT))); + + *p = 1 << bit; + if (up) + if (bit == 7) { + bit--; + up = 0; + } else + bit++; + else if (bit == 0) + up = 1; + else + bit--; +} +#endif /* CONFIG_HEARTBEAT */ + +void rts7751r2d_led(unsigned short value) +{ + ctrl_outw(value, PA_OUTPORT); +} + +void debug_led_disp(void) +{ + unsigned short value; + + value = (unsigned short)debug_counter++; + rts7751r2d_led(value); + if (value == 0xff) + debug_counter = 0; +} |