diff options
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/se/7300/led.c |
Linux-2.6.12-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/se/7300/led.c')
-rw-r--r-- | arch/sh/boards/se/7300/led.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/sh/boards/se/7300/led.c b/arch/sh/boards/se/7300/led.c new file mode 100644 index 00000000000..02c7f846c84 --- /dev/null +++ b/arch/sh/boards/se/7300/led.c @@ -0,0 +1,69 @@ +/* + * linux/arch/sh/boards/se/7300/led.c + * + * Derived from linux/arch/sh/boards/se/770x/led.c + * + * Copyright (C) 2000 Stuart Menefy <stuart.menefy@st.com> + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + * This file contains Solution Engine specific LED code. + */ + +#include <linux/config.h> +#include <linux/sched.h> +#include <asm/mach/se7300.h> + +static void +mach_led(int position, int value) +{ + volatile unsigned short *p = (volatile unsigned short *) PA_LED; + + if (value) { + *p |= (1 << 8); + } else { + *p &= ~(1 << 8); + } +} + + +/* Cycle the LED's in the clasic Knightrider/Sun pattern */ +void +heartbeat_7300se(void) +{ + static unsigned int cnt = 0, period = 0; + volatile unsigned short *p = (volatile unsigned short *) PA_LED; + 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(inf)->110 + */ + period = 110 - ((300 << FSHIFT) / ((avenrun[0] / 5) + (3 << FSHIFT))); + + if (up) { + if (bit == 7) { + bit--; + up = 0; + } else { + bit++; + } + } else { + if (bit == 0) { + bit++; + up = 1; + } else { + bit--; + } + } + *p = 1 << (bit + 8); + +} + |