clock_am43xx:Set the MAC clock to /5 for OPP100
When EMAC is in the boot order, the boot ROM sets OPP50 and the
MAC clock is set to /2. SPL needs to change it to /5 for Ethernet
to generate the correct txclk. This patch sets it correctly.
Signed-off-by: Steve Kipisz <s-kipisz2@ti.com>
diff --git a/arch/arm/cpu/armv7/am33xx/clock_am43xx.c b/arch/arm/cpu/armv7/am33xx/clock_am43xx.c
index 31188c8..529a119 100644
--- a/arch/arm/cpu/armv7/am33xx/clock_am43xx.c
+++ b/arch/arm/cpu/armv7/am33xx/clock_am43xx.c
@@ -118,4 +118,7 @@
/* Select the Master osc clk as Timer2 clock source */
writel(0x1, &cmdpll->clktimer2clk);
+
+ /* For OPP100 the mac clock should be /5. */
+ writel(0x4, &cmdpll->clkselmacclk);
}
diff --git a/arch/arm/include/asm/arch-am33xx/cpu.h b/arch/arm/include/asm/arch-am33xx/cpu.h
index b94b56c..523d22e 100644
--- a/arch/arm/include/asm/arch-am33xx/cpu.h
+++ b/arch/arm/include/asm/arch-am33xx/cpu.h
@@ -400,6 +400,8 @@
struct cm_dpll {
unsigned int resv1;
unsigned int clktimer2clk; /* offset 0x04 */
+ unsigned int resv2[11];
+ unsigned int clkselmacclk; /* offset 0x34 */
};
#endif /* CONFIG_AM43XX */