From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-ee0-x22e.google.com ([2a00:1450:4013:c00::22e]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VW8a8-0007bg-4i for barebox@lists.infradead.org; Tue, 15 Oct 2013 17:38:57 +0000 Received: by mail-ee0-f46.google.com with SMTP id c13so4110945eek.5 for ; Tue, 15 Oct 2013 10:38:34 -0700 (PDT) From: Andre Heider Date: Tue, 15 Oct 2013 19:38:23 +0200 Message-Id: <1381858703-27993-2-git-send-email-a.heider@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 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: [PATCH] ARM: rpi: fix reading of the EMMC clock for CONFIG_MMU To: barebox@lists.infradead.org Add explicit flushing to prevent the 50MHz fallback. Signed-off-by: Andre Heider --- drivers/mci/mci-bcm2835.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/mci/mci-bcm2835.c b/drivers/mci/mci-bcm2835.c index a0c364d..2ffdeec 100644 --- a/drivers/mci/mci-bcm2835.c +++ b/drivers/mci/mci-bcm2835.c @@ -28,6 +28,7 @@ * Author: Wilhelm Lundgren */ +#include #include #include #include @@ -471,7 +472,7 @@ int bcm2835_mci_reset(struct mci_host *mci, struct device_d *mci_dev) static u32 bcm2835_mci_get_emmc_clock(struct msg_get_clock_rate *clk_data) { u32 val; - struct bcm2835_mbox_regs *regs = + struct bcm2835_mbox_regs __iomem *regs = (struct bcm2835_mbox_regs *) BCM2835_MBOX_PHYSADDR; /*Read out old msg*/ @@ -489,6 +490,7 @@ static u32 bcm2835_mci_get_emmc_clock(struct msg_get_clock_rate *clk_data) break; } val = BCM2835_MBOX_PROP_CHAN + ((u32) &clk_data->hdr); + dma_flush_range((u32)clk_data, (u32)clk_data + sizeof(*clk_data)); writel(val, ®s->write); while (true) { @@ -504,6 +506,9 @@ static u32 bcm2835_mci_get_emmc_clock(struct msg_get_clock_rate *clk_data) if ((val & 0x0F) == BCM2835_MBOX_PROP_CHAN) break; } + + dma_inv_range((u32)clk_data, (u32)clk_data + sizeof(*clk_data)); + if ((val & ~0x0F) == ((u32) &clk_data->hdr)) if (clk_data->get_clock_rate.tag_hdr.val_len & BCM2835_MBOX_TAG_VAL_LEN_RESPONSE) -- 1.8.3.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox