diff options
author | Dario Binacchi | 2023-04-22 16:11:17 +0200 |
---|---|---|
committer | Stefano Babic | 2023-05-02 10:57:32 +0200 |
commit | 41d7a7da80ec7461cf57828db2c7ad5b29bbba33 (patch) | |
tree | 074e11122fd8da60445545e05f69fbd9e4c5fda4 /arch | |
parent | 3bc6257e8048bccec95b369fd3c946ac5d8ee9ea (diff) |
imx6: clock: improve calculations to get the PLL video rate
During some tests to check the pixel clock rate in the transition from
U-Boot to the Linux kernel, I noticed that with the same configuration
of the registers the debug messages reported different rates.
The same Linux kernel calculations are now used to get the PLL video
rate.
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mach-imx/mx6/clock.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/mx6/clock.c b/arch/arm/mach-imx/mx6/clock.c index cb9d629be40..17d8dcd5c84 100644 --- a/arch/arm/mach-imx/mx6/clock.c +++ b/arch/arm/mach-imx/mx6/clock.c @@ -213,6 +213,7 @@ int enable_spi_clk(unsigned char enable, unsigned spi_num) static u32 decode_pll(enum pll_clocks pll, u32 infreq) { u32 div, test_div, pll_num, pll_denom; + u64 temp64; switch (pll) { case PLL_SYS: @@ -272,7 +273,10 @@ static u32 decode_pll(enum pll_clocks pll, u32 infreq) } test_div = 1 << (2 - test_div); - return infreq * (div + pll_num / pll_denom) / test_div; + temp64 = (u64)infreq; + temp64 *= pll_num; + do_div(temp64, pll_denom); + return infreq * div + (unsigned long)temp64; default: return 0; } |