diff options
| author | Yuxi <b36102@freescale.com> | 2011-10-24 14:22:16 +0800 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2012-01-09 21:02:10 +0800 |
| commit | 1586360a2ddcbd82470cae919cb5e72b57176d12 (patch) | |
| tree | e9a3779e27b3d512461eb2c9e3010c405b46bd75 /drivers | |
| parent | 3035f11504b3e2eb2d285a056cf65e4e54abcd3e (diff) | |
ENGR00160626 fix system hang when ipu clk get rate
Enable ipu clk when try get rate
Signed-off-by: Yuxi Sun <b36102@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mxc/ipu3/ipu_disp.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mxc/ipu3/ipu_disp.c b/drivers/mxc/ipu3/ipu_disp.c index 9094fc64f109..9f3381071246 100644 --- a/drivers/mxc/ipu3/ipu_disp.c +++ b/drivers/mxc/ipu3/ipu_disp.c @@ -59,7 +59,12 @@ static inline struct ipu_soc *pixelclk2ipu(struct clk *clk) static unsigned long _ipu_pixel_clk_get_rate(struct clk *clk) { struct ipu_soc *ipu = pixelclk2ipu(clk); - u32 div = ipu_di_read(ipu, clk->id, DI_BS_CLKGEN0); + u32 div; + + _ipu_get(ipu); + div = ipu_di_read(ipu, clk->id, DI_BS_CLKGEN0); + _ipu_put(ipu); + if (div == 0) return 0; return (clk_get_rate(clk->parent) * 16) / div; |