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bbc-i2c: Fix BBC I2C envctrl on SunBlade 2000

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[ Upstream commit 5cdceab3d5 ]

Fix regression in bbc i2c temperature and fan control on some Sun systems
that causes the driver to refuse to load due to the bbc_i2c_bussel resource not
being present on the (second) i2c bus where the temperature sensors and fan
control are located. (The check for the number of resources was removed when
the driver was ported to a pure OF driver in mid 2008.)

Signed-off-by: Christopher Alexander Tobias Schulze <cat.schulze@alice-dsl.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christopher Alexander Tobias Schulze 2014-08-03 15:44:52 +02:00 committed by Greg Kroah-Hartman
parent d7bcdfe04e
commit 7554c49eda
2 changed files with 14 additions and 3 deletions
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6
drivers/sbus/char/bbc_envctrl.c
View file

@ -452,6 +452,9 @@ static void attach_one_temp(struct bbc_i2c_bus *bp, struct platform_device *op,
if (!tp)
return;
INIT_LIST_HEAD(&tp->bp_list);
INIT_LIST_HEAD(&tp->glob_list);
tp->client = bbc_i2c_attach(bp, op);
if (!tp->client) {
kfree(tp);
@ -497,6 +500,9 @@ static void attach_one_fan(struct bbc_i2c_bus *bp, struct platform_device *op,
if (!fp)
return;
INIT_LIST_HEAD(&fp->bp_list);
INIT_LIST_HEAD(&fp->glob_list);
fp->client = bbc_i2c_attach(bp, op);
if (!fp->client) {
kfree(fp);

5
drivers/sbus/char/bbc_i2c.c
View file

@ -301,13 +301,18 @@ static struct bbc_i2c_bus * __init attach_one_i2c(struct platform_device *op, in
if (!bp)
return NULL;
INIT_LIST_HEAD(&bp->temps);
INIT_LIST_HEAD(&bp->fans);
bp->i2c_control_regs = of_ioremap(&op->resource[0], 0, 0x2, "bbc_i2c_regs");
if (!bp->i2c_control_regs)
goto fail;
if (op->num_resources == 2) {
bp->i2c_bussel_reg = of_ioremap(&op->resource[1], 0, 0x1, "bbc_i2c_bussel");
if (!bp->i2c_bussel_reg)
goto fail;
}
bp->waiting = 0;
init_waitqueue_head(&bp->wq);