On 03/27/2013 03:01 AM, Mike Turquette wrote: > Quoting Prasanna Kumar (2013-03-25 22:20:51) >> From: Prasanna Kumar <prasanna.ps@xxxxxxxxxxx> >> >> According to Common Clock framework , modified the method of getting Huh ? Could you explain in detail what exactly in this patch is related to the Common Clock Framework ? I guess you mean the new clocks driver ? >> clock for MFC Block. >> >> Signed-off-by: Prasanna Kumar <prasanna.ps@xxxxxxxxxxx> >> --- >> drivers/media/platform/s5p-mfc/s5p_mfc_pm.c | 2 +- >> 1 files changed, 1 insertions(+), 1 deletions(-) >> >> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c b/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c >> index 6aa38a5..b8ac8f6 100644 >> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c >> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c >> @@ -50,7 +50,7 @@ int s5p_mfc_init_pm(struct s5p_mfc_dev *dev) >> goto err_p_ip_clk; >> } >> >> - pm->clock = clk_get(&dev->plat_dev->dev, dev->variant->mclk_name); >> + pm->clock = clk_get_parent(pm->clock_gate); > > Ok, I'll bite. Why make this change? Was there an issue using > clkdev/clk_get to get the clock you needed? Yes, this appears a pretty mysterious change to me... I wonder, have you altered anything at the clock tree definition to make it work ? What platforms has this change been tested on ? For Exynos4, I've changed the sclk_mfc clock definition, so it is possible to assign it to the MFC IP by listing it in the codec DT node clocks property. I suppose something similar is needed for Exynos5, if this is the platform you needed that change for. BTW, I think the mclk_name field should be removed from struct s5p_mfc_variant, an the driver should use fixed name for the second clock. Now there is "mfc", "sclk_mfc" used for Exynos4 and "mfc", "aclk_133" for Exynos5. Drivers are not really supposed to care about differences like this. Such differences could be easily handled in the device tree. The DT binding documentation just needs to specify the meaning of each clock name. [1] http://www.spinics.net/lists/arm-kernel/msg233521.html Regards, -- Sylwester Nawrocki Samsung Poland R&D Center -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
