From bba379d498b4ed408e79f7aec6dc23a3572c37e7 Mon Sep 17 00:00:00 2001
From: Steve Kipisz <s-kipisz2@ti.com>
Date: Wed, 11 Feb 2015 18:54:28 -0500
Subject: [PATCH] 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>
---
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 31188c85bcc..529a1195140 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 b94b56cba73..523d22eb87d 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 */
--
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