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>
diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c
index ac50bf9..b9f954e 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 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 @@
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 @@
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),
