[PATCH] ARM: imx6sl: config iomux-gpr1 to select clock for fec
Fugang Duan
B38611 at freescale.com
Thu Aug 22 06:56:31 EDT 2013
Config iomux-gpr1 to select clock source for fec system clock.
Clear gpr1[14], gpr1[18-17] bit to select the fec clock source
from internal anatop PLL.
Signed-off-by: Fugang Duan <B38611 at freescale.com>
---
arch/arm/mach-imx/mach-imx6sl.c | 20 ++++++++++++++++++++
1 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c
index 132db26..e0a8c12 100644
--- a/arch/arm/mach-imx/mach-imx6sl.c
+++ b/arch/arm/mach-imx/mach-imx6sl.c
@@ -11,17 +11,37 @@
#include <linux/irqchip.h>
#include <linux/of.h>
#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include "common.h"
+static void __init imx6sl_fec_init(void)
+{
+ struct regmap *gpr;
+
+ /* set FEC clock from internal PLL clock source */
+ gpr = syscon_regmap_lookup_by_compatible("fsl,imx6sl-iomuxc-gpr");
+ if (!IS_ERR(gpr)) {
+ regmap_update_bits(gpr, IOMUXC_GPR1,
+ IMX6SL_GPR1_FEC_CLOCK_MUX2_SEL_MASK, 0);
+ regmap_update_bits(gpr, IOMUXC_GPR1,
+ IMX6SL_GPR1_FEC_CLOCK_MUX1_SEL_MASK, 0);
+ } else
+ pr_err("failed to find fsl,imx6sl-iomux-gpr regmap\n");
+}
+
static void __init imx6sl_init_machine(void)
{
mxc_arch_reset_init_dt();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+
+ imx6sl_fec_init();
}
static void __init imx6sl_init_irq(void)
--
1.7.1
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