package/boot/uboot-sunxi/patches/091-sun6i-sync-PLL1-multdiv-with-Boot1.patch

   1 From a58eb20fb80f478038243e9e0f30f6984725e265 Mon Sep 17 00:00:00 2001
   2 From: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
   3 Date: Tue, 6 Jan 2015 15:47:18 +0100
   4 Subject: sun6i: Sync PLL1 multipliers/dividers with Boot1
   5
   6 This change syncs up the multipliers and dividers used to initialize
   7 PLL1 (i.e. the fast clock driving the ARM cores) with the values used
   8 in Allwinner's Boot1 on sun6i.
   9
  10 More specifically, the following settings are now used:
  11  * up to 768MHz:  mul=2, div=2 (was: mul=1, div=1)
  12  * up to 1152MHz: mul=3, div=2 (unchanged)
  13  * above 1152MHz: mul=4, div=2 (was: mul=2, div=1)
  14
  15 diff --git a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
  16 index cfb32b4..2986539 100644
  17 --- a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
  18 +++ b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
  19 @@ -102,11 +102,12 @@ void clock_set_pll1(unsigned int clk)
  20         struct sunxi_ccm_reg * const ccm =
  21                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  22         const int p = 0;
  23 -       int k = 1;
  24 -       int m = 1;
  25 +       int k = 2;
  26 +       int m = 2;
  27
  28         if (clk > 1152000000) {
  29 -               k = 2;
  30 +               k = 4;
  31 +               m = 2;
  32         } else if (clk > 768000000) {
  33                 k = 3;
  34                 m = 2;
  35 --
  36 cgit v0.10.2
  37