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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2007-10-26 17:56:40 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-10-31 15:21:39 +0000 |
| commit | d8cb70d10a2d4e6b083b89044a68d860d0bf1eec (patch) | |
| tree | d84cbb7ce12f6a2514237ef29688f2c40fbd3707 | |
| parent | 5984a2fc7e7c9ab118e78ae9799e98fc4ade40f9 (diff) | |
| download | linux-d8cb70d10a2d4e6b083b89044a68d860d0bf1eec.tar.gz linux-d8cb70d10a2d4e6b083b89044a68d860d0bf1eec.tar.bz2 linux-d8cb70d10a2d4e6b083b89044a68d860d0bf1eec.zip | |
[ARM] Fix pxamci regression
Fix:
WARNING: at arch/arm/mach-pxa/clock.c:69 clk_disable()
[<c002d7c8>] (dump_stack+0x0/0x14) from [<c00334f4>] (clk_disable+0x34/0xa0)
[<c00334c0>] (clk_disable+0x0/0xa0) from [<c028a43c>] (pxamci_set_ios+0x74/0xf0)
[<c028a3c8>] (pxamci_set_ios+0x0/0xf0) from [<c0281548>] (mmc_power_off+0x90/0x9c)
[<c02814b8>] (mmc_power_off+0x0/0x9c) from [<c0281a30>] (mmc_start_host+0x18/0x28)
[<c0281a18>] (mmc_start_host+0x0/0x28) from [<c02825a0>] (mmc_add_host+0xe8/0x104)
[<c02824b8>] (mmc_add_host+0x0/0x104) from [<c028a7d0>] (pxamci_probe+0x24c/0x2f4)
[<c028a584>] (pxamci_probe+0x0/0x2f4) from [<c01e5948>] (platform_drv_probe+0x20/0x24)
...
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | drivers/mmc/host/pxamci.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c index a25ee71998a9..1654a3330340 100644 --- a/drivers/mmc/host/pxamci.c +++ b/drivers/mmc/host/pxamci.c @@ -39,6 +39,7 @@ #define DRIVER_NAME "pxa2xx-mci" #define NR_SG 1 +#define CLKRT_OFF (~0) struct pxamci_host { struct mmc_host *mmc; @@ -371,6 +372,9 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) unsigned long rate = host->clkrate; unsigned int clk = rate / ios->clock; + if (host->clkrt == CLKRT_OFF) + clk_enable(host->clk); + /* * clk might result in a lower divisor than we * desire. check for that condition and adjust @@ -379,14 +383,16 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (rate / clk > ios->clock) clk <<= 1; host->clkrt = fls(clk) - 1; - clk_enable(host->clk); /* * we write clkrt on the next command */ } else { pxamci_stop_clock(host); - clk_disable(host->clk); + if (host->clkrt != CLKRT_OFF) { + host->clkrt = CLKRT_OFF; + clk_disable(host->clk); + } } if (host->power_mode != ios->power_mode) { @@ -498,6 +504,7 @@ static int pxamci_probe(struct platform_device *pdev) host->mmc = mmc; host->dma = -1; host->pdata = pdev->dev.platform_data; + host->clkrt = CLKRT_OFF; host->clk = clk_get(&pdev->dev, "MMCCLK"); if (IS_ERR(host->clk)) { |