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 merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Tyn7b-00005V-EA for barebox@lists.infradead.org; Fri, 25 Jan 2013 17:31:24 +0000 Date: Fri, 25 Jan 2013 18:31:19 +0100 From: Sascha Hauer Message-ID: <20130125173119.GL1906@pengutronix.de> References: <20130125151448.GD26329@game.jcrosoft.org> <1359127067-30079-1-git-send-email-plagnioj@jcrosoft.com> <1359127067-30079-8-git-send-email-plagnioj@jcrosoft.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1359127067-30079-8-git-send-email-plagnioj@jcrosoft.com> 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-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH 08/14] atmel_mci: rwproof is only needed since IP version 0x200 To: Jean-Christophe PLAGNIOL-VILLARD Cc: barebox@lists.infradead.org On Fri, Jan 25, 2013 at 04:17:41PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote: > Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD > --- > drivers/mci/atmel_mci.c | 10 +++++++++- > 1 file changed, 9 insertions(+), 1 deletion(-) > > diff --git a/drivers/mci/atmel_mci.c b/drivers/mci/atmel_mci.c > index d5fdd1d..bf0adb0 100644 > --- a/drivers/mci/atmel_mci.c > +++ b/drivers/mci/atmel_mci.c > @@ -28,6 +28,7 @@ > #include "atmel-mci-regs.h" > > struct atmel_mci_caps { > + bool has_rwproof; > bool has_odd_clk_div; > }; > > @@ -94,7 +95,13 @@ static void atmci_set_clk_rate(struct atmel_mci *host, > dev_dbg(host->hw_dev, "atmel_set_clk_rate: clkIn=%ld clkIos=%d divider=%d\n", > host->bus_hz, clock_min, clkdiv); > > - host->mode_reg |= ATMCI_MR_RDPROOF | ATMCI_MR_WRPROOF; > + /* > + * WRPROOF and RDPROOF prevent overruns/underruns by > + * stopping the clock when the FIFO is full/empty. > + * This state is not expected to last for long. > + */ > + if (host->caps.has_rwproof) > + host->mode_reg |= ATMCI_MR_RDPROOF | ATMCI_MR_WRPROOF; > > atmci_writel(host, ATMCI_MR, host->mode_reg); > } > @@ -470,6 +477,7 @@ static void atmci_get_cap(struct atmel_mci *host) > case 0x400: > case 0x300: > case 0x200: > + host->caps.has_rwproof = 1; > case 0x100: > case 0x0: By 'since' in the subject do you mean 'up to'? Sascha -- 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