[U-Boot] [PATCH] mx51evk: Provide a proper reset for the Ethernet PHY
Provide a proper reset for the Ethernet PHY (LAN8700) on the MX51EVK. Signed-off-by: Fabio Estevam --- board/freescale/mx51evk/mx51evk.c |4 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/board/freescale/mx51evk/mx51evk.c b/board/freescale/mx51evk/mx51evk.c index 75d642b..70cce55 100644 --- a/board/freescale/mx51evk/mx51evk.c +++ b/board/freescale/mx51evk/mx51evk.c @@ -261,6 +261,10 @@ static void power_init(void) /* Reset the ethernet controller over GPIO */ writel(0x1, IOMUXC_BASE_ADDR + 0x0AC); + udelay(200); + reg = readl(GPIO2_BASE_ADDR + 0x0); + reg |= 0x4000; /* Set reset line to high*/ + writel(reg, GPIO2_BASE_ADDR + 0x0); /* Enable VGEN3, VCAM, VAUDIO, VVIDEO, VSD regulators */ val = VGEN3EN | VGEN3CONFIG | VCAMEN | VCAMCONFIG | -- 1.6.0.4 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] [PATCH] mx51evk: Provide a proper reset for the Ethernet PHY
Fabio Estevam wrote: > Provide a proper reset for the Ethernet PHY (LAN8700) on the MX51EVK. > Hi Fabio, > Signed-off-by: Fabio Estevam > --- > board/freescale/mx51evk/mx51evk.c |4 > 1 files changed, 4 insertions(+), 0 deletions(-) > > diff --git a/board/freescale/mx51evk/mx51evk.c > b/board/freescale/mx51evk/mx51evk.c > index 75d642b..70cce55 100644 > --- a/board/freescale/mx51evk/mx51evk.c > +++ b/board/freescale/mx51evk/mx51evk.c > @@ -261,6 +261,10 @@ static void power_init(void) > > /* Reset the ethernet controller over GPIO */ > writel(0x1, IOMUXC_BASE_ADDR + 0x0AC); > + udelay(200); > + reg = readl(GPIO2_BASE_ADDR + 0x0); > + reg |= 0x4000; /* Set reset line to high*/ > + writel(reg, GPIO2_BASE_ADDR + 0x0); I know I am responsible for this usage, because I forget to add some accessors for the gpio pins - as I see your patch, I have sent a patch to support it. However, a direct access to registers using offsets is not allowed in u-boot. If we use some kind of accessors, your code will be easier to read it. Everything could be changed as (0X4000 --> gpio 46, if I am not wrong): udelay(200); mxc_gpio_set(46); What do you think ? Best regards, Stefano -- = DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: off...@denx.de = ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] [PATCH] mx51evk: Provide a proper reset for the Ethernet PHY
Hi Stefano, --- On Fri, 8/20/10, Stefano Babic wrote: ... > > I know I am responsible for this usage, because I forget to > add some > accessors for the gpio pins - as I see your patch, I have > sent a patch > to support it. However, a direct access to registers using > offsets is > not allowed in u-boot. If we use some kind of accessors, > your code will > be easier to read it. Everything could be changed as > (0X4000 --> gpio > 46, if I am not wrong): > > udelay(200); > mxc_gpio_set(46); > > What do you think ? Yes, I agree. Do you plan to send a patch for mx51evk using this approach? If you do, then I can re-submit my patch after your update. Regards, Fabio Estevam ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] [PATCH] mx51evk: Provide a proper reset for the Ethernet PHY
Fabio Estevam wrote: > Hi Stefano, > Hi Fabio, >> udelay(200); >> mxc_gpio_set(46); This must be, >> >> What do you think ? > > Yes, I agree. Do you plan to send a patch for mx51evk using this approach? > > If you do, then I can re-submit my patch after your update. I sent today a patch adding a common way to access gpios for i.MX31 and i.MX51: http://article.gmane.org/gmane.comp.boot-loaders.u-boot/83163 I have another issue. It seems to me that the lines you want to add are already in the code, only some lines later: 263 /* Enable VGEN3, VCAM, VAUDIO, VVIDEO, VSD regulators */ 264 val = VGEN3EN | VGEN3CONFIG | VCAMEN | VCAMCONFIG | 265 VVIDEOEN | VAUDIOEN | VSDEN; 266 pmic_reg_write(REG_MODE_1, val); 267 268 udelay(500); 269 270 reg = readl(GPIO2_BASE_ADDR + 0x0); 271 reg |= 0x4000; 272 writel(reg, GPIO2_BASE_ADDR + 0x0); This is exactly what you want to add, only after setting the regulators. Why do we need to set the gpio twice ? Best regards, Stefano Babic -- = DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: off...@denx.de = ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] [PATCH] mx51evk: Provide a proper reset for the Ethernet PHY
--- On Fri, 8/20/10, Stefano Babic wrote: ... > > This is exactly what you want to add, only after setting > the regulators. > Why do we need to set the gpio twice ? You are right. Please disregard my patch. Regards, Fabio Estevam ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
