From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XlGlN-0001zC-Q9 for barebox@lists.infradead.org; Mon, 03 Nov 2014 12:29:38 +0000 Date: Mon, 3 Nov 2014 13:29:14 +0100 From: Sascha Hauer Message-ID: <20141103122914.GN14443@pengutronix.de> References: <1415009424-5889-1-git-send-email-w.egorov@phytec.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1415009424-5889-1-git-send-email-w.egorov@phytec.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [For next PATCH v2 1/2] arm: am33xx: Add rmii2_crs_dv mux selection in SMA2 register To: Wadim Egorov Cc: barebox@lists.infradead.org On Mon, Nov 03, 2014 at 11:10:23AM +0100, Wadim Egorov wrote: > "Silicon revision 1.0 devices only provide the MMC2_DAT7 signal when Mode3 is > selected. Silicon revision 2.0 and newer devices implement another level of > pin multiplexing which provides the original MMC2_DAT7 signal or RMII2_CRS_DV > signal when Mode3 is selected. This new level of of pin multiplexing is > selected with bit zero of the SMA2 register." > > See AM335x Sitara Processors Manual. > > Signed-off-by: Wadim Egorov Applied, thanks Sascha > --- > v2: Added silicon revision check. SMA2 register does not exist in revision 1.0 > > arch/arm/mach-omap/am33xx_generic.c | 17 +++++++++++++++++ > arch/arm/mach-omap/include/mach/am33xx-generic.h | 1 + > 2 files changed, 18 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/mach-omap/am33xx_generic.c b/arch/arm/mach-omap/am33xx_generic.c > index f293134..7fe8881 100644 > --- a/arch/arm/mach-omap/am33xx_generic.c > +++ b/arch/arm/mach-omap/am33xx_generic.c > @@ -428,3 +428,20 @@ void am335x_sdram_init(int ioctrl, const struct am33xx_cmd_control *cmd_ctrl, > > am33xx_config_sdram(emif_regs); > } > + > +#define AM33XX_CONTROL_SMA2_OFS 0x1320 > + > +/** > + * am33xx_select_rmii2_crs_dv - Select RMII2_CRS_DV on GPMC_A9 pin in MODE3 > + */ > +void am33xx_select_rmii2_crs_dv(void) > +{ > + uint32_t val; > + > + if (am33xx_get_cpu_rev() == AM335X_ES1_0) > + return; > + > + val = readl(AM33XX_CTRL_BASE + AM33XX_CONTROL_SMA2_OFS); > + val |= 0x00000001; > + writel(val, AM33XX_CTRL_BASE + AM33XX_CONTROL_SMA2_OFS); > +} > diff --git a/arch/arm/mach-omap/include/mach/am33xx-generic.h b/arch/arm/mach-omap/include/mach/am33xx-generic.h > index 6c85d51..1264e7e 100644 > --- a/arch/arm/mach-omap/include/mach/am33xx-generic.h > +++ b/arch/arm/mach-omap/include/mach/am33xx-generic.h > @@ -33,5 +33,6 @@ void __noreturn am33xx_reset_cpu(unsigned long addr); > void am33xx_enable_per_clocks(void); > int am33xx_init(void); > int am33xx_devices_init(void); > +void am33xx_select_rmii2_crs_dv(void); > > #endif /* __MACH_AM33XX_GENERIC_H */ > -- > 1.7.0.4 > > > _______________________________________________ > barebox mailing list > barebox@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox