From: Steve Kipisz s-kipisz2@ti.com
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 --- arch/arm/cpu/armv7/am33xx/clock_am43xx.c | 3 +++ arch/arm/include/asm/arch-am33xx/cpu.h | 2 ++ 2 files changed, 5 insertions(+)
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 @@ void enable_basic_clocks(void)
/* 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 prm_device_inst { struct cm_dpll { unsigned int resv1; unsigned int clktimer2clk; /* offset 0x04 */ + unsigned int resv2[11]; + unsigned int clkselmacclk; /* offset 0x34 */ }; #endif /* CONFIG_AM43XX */