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authorDaniel Drake <dsd@laptop.org>2013-06-17 19:30:36 +0400
committerWolfram Sang <wsa@the-dreams.de>2013-06-18 20:11:32 +0400
commit7a10f4732972b48f75a547a42f9cdfef340124a6 (patch)
tree9e8953c887e06377a50d18ab7cd74bc084cd1280 /drivers/i2c/busses/i2c-pxa.c
parent661f6c1cd926c6c973e03c6b5151d161f3a666ed (diff)
downloadlinux-7a10f4732972b48f75a547a42f9cdfef340124a6.tar.xz
i2c-pxa: prepare clock before use
On OLPC XO-1.75 (MMP2), a WARN_ON() was occurring during boot since the clock being enabled by i2c-pxa had not been prepared. Use clk_prepare_enable() to ensure that the prepare operation has taken place, and use clk_disable_unprepare() in the matching shutdown paths. Signed-off-by: Daniel Drake <dsd@laptop.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/busses/i2c-pxa.c')
-rw-r--r--drivers/i2c/busses/i2c-pxa.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index ea6d45d1dcd6..fbafed29fb81 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -1160,7 +1160,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
i2c->adap.class = plat->class;
}
- clk_enable(i2c->clk);
+ clk_prepare_enable(i2c->clk);
if (i2c->use_pio) {
i2c->adap.algo = &i2c_pxa_pio_algorithm;
@@ -1202,7 +1202,7 @@ eadapt:
if (!i2c->use_pio)
free_irq(irq, i2c);
ereqirq:
- clk_disable(i2c->clk);
+ clk_disable_unprepare(i2c->clk);
iounmap(i2c->reg_base);
eremap:
clk_put(i2c->clk);
@@ -1221,7 +1221,7 @@ static int i2c_pxa_remove(struct platform_device *dev)
if (!i2c->use_pio)
free_irq(i2c->irq, i2c);
- clk_disable(i2c->clk);
+ clk_disable_unprepare(i2c->clk);
clk_put(i2c->clk);
iounmap(i2c->reg_base);