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| author | Maciej W. Rozycki <macro@linux-mips.org> | 2008-07-15 00:38:33 +0400 |
|---|---|---|
| committer | Jean Delvare <khali@mahadeva.delvare> | 2008-07-15 00:38:33 +0400 |
| commit | 392a0408fdc4c9069c32a9a02b0088eae76c4618 (patch) | |
| tree | afc609b4dfa91e8d3a230e8a7044c6d848f5a4d9 /arch/mips/sibyte | |
| parent | cf898dc5e9dfd1487b28ca0176b68722f05d4d48 (diff) | |
| download | linux-392a0408fdc4c9069c32a9a02b0088eae76c4618.tar.xz | |
i2c-sibyte: SWARM I2C board initialization
The standard rtc-m41t80.c driver cannot be used with the SWARM as it is,
because the board does not provide setup information for the I2C core.
As a result the bus and the address to probe for the M41T80 chip is not
known.
Here is a set of changes that fix the problem:
1. swarm-i2c.c -- SWARM I2C board setup, currently for the M41T80 chip on
the bus #1 only (there is a MAX6654 temperature sensor on the bus #0
which may be added in the future if we have a driver for that chip).
2. The i2c-sibyte.c BCM1250A SMBus controller driver now registers its
buses as numbered so that board setup is correctly applied.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'arch/mips/sibyte')
| -rw-r--r-- | arch/mips/sibyte/swarm/Makefile | 1 | ||||
| -rw-r--r-- | arch/mips/sibyte/swarm/swarm-i2c.c | 37 |
2 files changed, 38 insertions, 0 deletions
diff --git a/arch/mips/sibyte/swarm/Makefile b/arch/mips/sibyte/swarm/Makefile index 1775755a2619..255d692bfa18 100644 --- a/arch/mips/sibyte/swarm/Makefile +++ b/arch/mips/sibyte/swarm/Makefile @@ -1,3 +1,4 @@ obj-y := setup.o rtc_xicor1241.o rtc_m41t81.o +obj-$(CONFIG_I2C_BOARDINFO) += swarm-i2c.o obj-$(CONFIG_KGDB) += dbg_io.o diff --git a/arch/mips/sibyte/swarm/swarm-i2c.c b/arch/mips/sibyte/swarm/swarm-i2c.c new file mode 100644 index 000000000000..4282ac9d01d2 --- /dev/null +++ b/arch/mips/sibyte/swarm/swarm-i2c.c @@ -0,0 +1,37 @@ +/* + * arch/mips/sibyte/swarm/swarm-i2c.c + * + * Broadcom BCM91250A (SWARM), etc. I2C platform setup. + * + * Copyright (c) 2008 Maciej W. Rozycki + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/kernel.h> + + +static struct i2c_board_info swarm_i2c_info1[] __initdata = { + { + I2C_BOARD_INFO("m41t81", 0x68), + }, +}; + +static int __init swarm_i2c_init(void) +{ + int err; + + err = i2c_register_board_info(1, swarm_i2c_info1, + ARRAY_SIZE(swarm_i2c_info1)); + if (err < 0) + printk(KERN_ERR + "swarm-i2c: cannot register board I2C devices\n"); + return err; +} + +arch_initcall(swarm_i2c_init); |