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| author | Wolfram Sang <w.sang@pengutronix.de> | 2011-09-10 12:29:43 +0200 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2012-01-27 11:50:14 +0800 |
| commit | a62407256bbcba8e3f62695a87534050ceec0e6f (patch) | |
| tree | ecd2c62f50c6a3f752ff7cfb9f5bae3a382e9e2a /arch/arm/mach-mxs/clock-mx28.c | |
| parent | bfc0b9c8a9d546eb53a3491c893fad72d96540cb (diff) | |
| download | linux-a62407256bbcba8e3f62695a87534050ceec0e6f.tar.gz linux-a62407256bbcba8e3f62695a87534050ceec0e6f.tar.bz2 linux-a62407256bbcba8e3f62695a87534050ceec0e6f.zip | |
ARM: mx28: check for gated clocks when setting saif divider
Like with all other clocks, the divider for the SAIF devices should not
be altered when the clock is gated. Bail out when this is the case like
the other clocks do.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Dong Aisheng-B29396 <B29396@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Diffstat (limited to 'arch/arm/mach-mxs/clock-mx28.c')
| -rw-r--r-- | arch/arm/mach-mxs/clock-mx28.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mach-mxs/clock-mx28.c b/arch/arm/mach-mxs/clock-mx28.c index f71d01282dcd..54d82a4b4cf0 100644 --- a/arch/arm/mach-mxs/clock-mx28.c +++ b/arch/arm/mach-mxs/clock-mx28.c @@ -477,6 +477,10 @@ static int name##_set_rate(struct clk *clk, unsigned long rate) \ reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_##rs); \ reg &= ~BM_CLKCTRL_##rs##_DIV; \ reg |= div << BP_CLKCTRL_##rs##_DIV; \ + if (reg & (1 << clk->enable_shift)) { \ + pr_err("%s: clock is gated\n", __func__); \ + return -EINVAL; \ + } \ __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_##rs); \ \ for (i = 10000; i; i--) \ |