From a62407256bbcba8e3f62695a87534050ceec0e6f Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Sat, 10 Sep 2011 12:29:43 +0200 Subject: [PATCH] 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 Cc: Sascha Hauer Cc: Dong Aisheng-B29396 Signed-off-by: Shawn Guo --- arch/arm/mach-mxs/clock-mx28.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/mach-mxs/clock-mx28.c b/arch/arm/mach-mxs/clock-mx28.c index f71d012..54d82a4 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--) \ -- 2.7.4