On Tue, Oct 06, 2015 at 09:42:15AM +0100, Mike Rapoport wrote:
> The getChipClock function is used only to get MXCLK frequency, which
> makes most of getPllValue function unused and thus. The detection of
> MXCLK frequency may be implemented directly in getChipClock rendering
> getPllValue and calcPLL unused.
>
> Signed-off-by: Mike Rapoport <mike.rapop...@gmail.com>
> ---
You have also missed saving the values in pPLL->inputFreq and
pPLL->clockType = clockType. Both have been used later.
Is it ok to remove the PLL calculation of all the different type of
display devices? Currently only PANEL_PLL_CTRL is being used for
calculation and ofcourse we also donot keep in kernel that we donot use.
Maybe we can do some thing like:
diff --git a/drivers/staging/sm750fb/ddk750_chip.c
b/drivers/staging/sm750fb/ddk750_chip.c
index ad2f1c0..4b60894 100644
--- a/drivers/staging/sm750fb/ddk750_chip.c
+++ b/drivers/staging/sm750fb/ddk750_chip.c
@@ -39,11 +39,17 @@ static unsigned int getChipClock(void)
{
unsigned int pll_reg;
unsigned int M, N, OD, POD;
+ clock_type_t clk_type = PANEL_PLL_CTRL;
+ /*
+ * Different register location based on display device type:
+ * MXCLK_PLL_CTRL, PANEL_PLL_CTRL, CRT_PLL_CTRL, VGA_PLL0_CTRL,
+ * VGA_PLL1_CTRL
+ */
if (getChipType() == SM750LE)
return MHz(130);
- pll_reg = PEEK32(MXCLK_PLL_CTRL);
+ pll_reg = PEEK32(clk_type);
M = FIELD_GET(pll_reg, PANEL_PLL_CTRL, M);
N = FIELD_GET(pll_reg, PANEL_PLL_CTRL, N);
OD = FIELD_GET(pll_reg, PANEL_PLL_CTRL, OD);
---
This is on top of your patch. So now we have the different possible
values in the comments, so whenever, if anyone is working on a different
device atleast they will not have to search and find out what the other
values can be.
regards
sudip
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