> -----Original Message----- > From: Kevin Hilman [mailto:khilman@xxxxxxxxxxxxxxxxxxx] > Sent: Monday, September 27, 2010 8:26 PM > To: Varadarajan, Charulatha > Cc: linux-omap@xxxxxxxxxxxxxxx; Premi, Sanjeev; tony@xxxxxxxxxxx > Subject: Re: [PATCH RFC:] FIX: OMAP3EVM: Ethernet controller > smsc911x reset > > "Varadarajan, Charulatha" <charu@xxxxxx> writes: > > > Sanjeev, > > > > With GPIO hwmod series, OMAP3EVM board is not up with DHCP > + nfs root. > > This issue was reported by Kevin. > > > > The root cause of this issue is that during OMAP3EVM board init, the > > Ethernet controller (smsc911x) is not reset and it relies > on the uboot > > configurations for it's operations. The reset GPIO pin used for this > > purpose is not even reserved. > > > > After gpio hmwod series are merged, this patch is required > to make the > > EVM board working. Also omap3evm_init_smsc911x() needs to be fixed > > including CS settings and other required settings for > Ethernet controller. > > > > Links to related discussions: > > http://www.spinics.net/lists/linux-omap/msg37234.html > > http://www.spinics.net/lists/linux-omap/msg36698.html > > http://www.spinics.net/lists/linux-omap/msg36799.html > > > > The below patch is tested on OMAP3 EVM board (ES3.1). > > Also note that the patch below didn't work on my EVM (ES2.1), > making me > assume that it uses a different GPIO for older boards. I am waiting for right person to review the patches; he was on travel this weekend. Hope to get his time tomorrow... > Kevin > > > > > > >> -----Original Message----- > >> From: Varadarajan, Charulatha > >> Sent: Saturday, September 25, 2010 5:07 PM > >> To: linux-omap@xxxxxxxxxxxxxxx > >> Cc: khilman@xxxxxxxxxxxxxxxxxxx; tony@xxxxxxxxxxx; Premi, Sanjeev; > >> Varadarajan, Charulatha > >> Subject: [PATCH RFC:] FIX: OMAP3EVM: Ethernet controller > smsc911x reset > >> > >> 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 > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
