diff options
| author | Vaibhav Hiremath <hvaibhav@ti.com> | 2011-01-24 19:25:55 +0000 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2011-02-17 14:15:57 -0800 |
| commit | 9bc64b89cd730a09b02c66af730229e0abc9e2bb (patch) | |
| tree | e5e41fc873d4f2c8953c88f2a8a47fbdd228f2d2 | |
| parent | 741927f753a41c644840589a382a1d3500f86206 (diff) | |
| download | blackbird-op-linux-9bc64b89cd730a09b02c66af730229e0abc9e2bb.tar.gz blackbird-op-linux-9bc64b89cd730a09b02c66af730229e0abc9e2bb.zip | |
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>
| -rw-r--r-- | arch/arm/mach-omap2/board-omap3evm.c | 39 |
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), |
