> -----Original Message-----
> From: linux-omap-ow...@vger.kernel.org [mailto:linux-omap-
> ow...@vger.kernel.org] On Behalf Of Kevin Hilman
> Sent: Monday, September 27, 2010 8:26 PM
> To: Varadarajan, Charulatha
> Cc: linux-omap@vger.kernel.org; Premi, Sanjeev; t...@atomide.com
> Subject: Re: [PATCH RFC:] FIX: OMAP3EVM: Ethernet controller smsc911x
> reset
>
> "Varadarajan, Charulatha" <ch...@ti.com> 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.
>
[Hiremath, Vaibhav] I have also tried it on my REV-G version of EVM (Silicon
ES3.1) and it is not working for me.
Trying to debug further.
Thanks,
Vaibhav
> Kevin
>
> >
> >
> >> -----Original Message-----
> >> From: Varadarajan, Charulatha
> >> Sent: Saturday, September 25, 2010 5:07 PM
> >> To: linux-omap@vger.kernel.org
> >> Cc: khil...@deeprootsystems.com; t...@atomide.com; 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 <ch...@ti.com>
> >> ---
> >> 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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