imx9: clock: config arm alt root to 500mhz

Config the A55 alt root clock to 500MHz(LD mode frequency)
by default. Normally, this clock root is only used as an
intermediate clock soure for A55 core/dsu when change the
ARM PLL frequency.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

diff --git a/arch/arm/mach-imx/imx9/clock.c b/arch/arm/mach-imx/imx9/clock.c
index 3faab0685f7ecd3a8ea8d6e666816cf76ad2fdc6..957f80fce2e8a4fc0143fe8dd487538c2bbdfa51 100644 (file)
--- a/arch/arm/mach-imx/imx9/clock.c
+++ b/arch/arm/mach-imx/imx9/clock.c
@@ -727,6 +727,12 @@ struct imx_clk_setting imx_clk_settings[] = {
 };
 #else
 struct imx_clk_setting imx_clk_settings[] = {
+       /*
+        * Set A55 clk to 500M. This clock root is normally used as intermediate
+        * clock source for A55 core/DSU when doing ARM PLL reconfig. set it to
+        * 500MHz(LD mode frequency) should be ok.
+        */
+       {ARM_A55_CLK_ROOT, SYS_PLL_PFD0, 2},
        /* Set A55 periphal to 333M */
        {ARM_A55_PERIPH_CLK_ROOT, SYS_PLL_PFD0, 3},
        /* Set A55 mtr bus to 133M */