Do reset of Ethernet controller smsc911x using OMAP gpio7
while initializing the Ethernet controller.
Signed-off-by: Charulatha V <charu@xxxxxx>
---
arch/arm/mach-omap2/board-omap3evm.c | 16 ++++++++++++++++
1 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c
index f76d9c0..54a7e20 100644
--- a/arch/arm/mach-omap2/board-omap3evm.c
+++ b/arch/arm/mach-omap2/board-omap3evm.c
@@ -55,6 +55,7 @@
#define OMAP3EVM_ETHR_SIZE 1024
#define OMAP3EVM_ETHR_ID_REV 0x50
#define OMAP3EVM_ETHR_GPIO_IRQ 176
+#define OMAP3EVM_ETHR_GPIO_RST 7
#define OMAP3EVM_SMSC911X_CS 5
static u8 omap3_evm_version;
@@ -134,6 +135,20 @@ static inline void __init omap3evm_init_smsc911x(void)
else
rate = clk_get_rate(l3ck);
+ /* Configure ethernet controller reset gpio */
+ if (gpio_request(OMAP3EVM_ETHR_GPIO_RST, "SMSC911x gpio") < 0) {
+ pr_err(KERN_ERR "Failed to request GPIO8 for smsc911x gpio\n");
+ return;
+ }
+
+ gpio_direction_output(OMAP3EVM_ETHR_GPIO_RST, 1);
+
+ /* reset pulse to ethernet controller*/
+ gpio_set_value(OMAP3EVM_ETHR_GPIO_RST, 0);
+ usleep_range(150, 220);
+ gpio_set_value(OMAP3EVM_ETHR_GPIO_RST, 1);
+ usleep_range(1, 2);
+
if (gpio_request(OMAP3EVM_ETHR_GPIO_IRQ, "SMSC911x irq") < 0) {
printk(KERN_ERR "Failed to request GPIO%d for smsc911x IRQ\n",
OMAP3EVM_ETHR_GPIO_IRQ);
--
1.7.0.4
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