OMAP3EVM: Reset the smsc911x ethernet controller in board_init

With addition of hwmod support to gpio, the ethernet controller
goes undetected for OMAP35xEVM. So explicitly assert the reset signal to
ethernet controller smsc911x -

	- GPIO7 (>=RevG version of EVM's)
	- GPIO64 (<=RevD version of EVM's)

Tested this patch on RevG version of EVM with ES3.1 Si.

This patch is based on intial version from Charulatha V, reference
to original discussion -
http://www.mail-archive.com/linux-omap@vger.kernel.org/msg35784.html

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 38 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c
index ac50bf949447..b9f954e839d3 100644
--- a/arch/arm/mach-omap2/board-omap3evm.c
+++ b/arch/arm/mach-omap2/board-omap3evm.c
@@ -60,6 +60,13 @@
 #define OMAP3EVM_ETHR_ID_REV    0x50
 #define OMAP3EVM_ETHR_GPIO_IRQ  176
 #define OMAP3EVM_SMSC911X_CS    5
+/*
+ * Eth Reset signal
+ *      64 = Generation 1 (<=RevD)
+ *      7 = Generation 2 (>=RevE)
+ */
+#define OMAP3EVM_GEN1_ETHR_GPIO_RST     64
+#define OMAP3EVM_GEN2_ETHR_GPIO_RST     7
 
 static u8 omap3_evm_version;
 
@@ -126,10 +133,15 @@ static struct platform_device omap3evm_smsc911x_device = {
 
 static inline void __init omap3evm_init_smsc911x(void)
 {
-        int eth_cs;
+        int eth_cs, eth_rst;
         struct clk *l3ck;
         unsigned int rate;
 
+        if (get_omap3_evm_rev() == OMAP3EVM_BOARD_GEN_1)
+                eth_rst = OMAP3EVM_GEN1_ETHR_GPIO_RST;
+        else
+                eth_rst = OMAP3EVM_GEN2_ETHR_GPIO_RST;
+
         eth_cs = OMAP3EVM_SMSC911X_CS;
 
         l3ck = clk_get(NULL, "l3_ck");
@@ -138,6 +150,27 @@ static inline void __init omap3evm_init_smsc911x(void)
         else
                 rate = clk_get_rate(l3ck);
 
+        /* Configure ethernet controller reset gpio */
+        if (cpu_is_omap3430()) {
+                if (gpio_request(eth_rst, "SMSC911x gpio") < 0) {
+                        pr_err(KERN_ERR "Failed to request %d for smsc911x\n",
+                                        eth_rst);
+                        return;
+                }
+
+                if (gpio_direction_output(eth_rst, 1) < 0) {
+                        pr_err(KERN_ERR "Failed to set direction of %d for" \
+                                        " smsc911x\n", eth_rst);
+                        return;
+                }
+                /* reset pulse to ethernet controller*/
+                usleep_range(150, 220);
+                gpio_set_value(eth_rst, 0);
+                usleep_range(150, 220);
+                gpio_set_value(eth_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);
@@ -713,6 +746,10 @@ static struct omap_board_mux board_mux[] __initdata = {
                                 OMAP_PIN_OFF_WAKEUPENABLE),
         OMAP3_MUX(MCSPI1_CS1, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLUP |
                                 OMAP_PIN_OFF_INPUT_PULLUP | OMAP_PIN_OFF_OUTPUT_LOW),
+        OMAP3_MUX(SYS_BOOT5, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLUP |
+                                OMAP_PIN_OFF_NONE),
+        OMAP3_MUX(GPMC_WAIT2, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLUP |
+                                OMAP_PIN_OFF_NONE),
 #ifdef CONFIG_WL12XX_PLATFORM_DATA
         /* WLAN IRQ - GPIO 149 */
         OMAP3_MUX(UART1_RTS, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLUP),