From: Andre Heider <a.heider@gmail.com>
To: barebox@lists.infradead.org
Subject: [PATCH] ARM: rpi: fix reading of the EMMC clock for CONFIG_MMU
Date: Tue, 15 Oct 2013 19:38:23 +0200 [thread overview]
Message-ID: <1381858703-27993-2-git-send-email-a.heider@gmail.com> (raw)
Add explicit flushing to prevent the 50MHz fallback.
Signed-off-by: Andre Heider <a.heider@gmail.com>
---
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 <wilhelm.lundgren@cybercom.com>
*/
+#include <asm/mmu.h>
#include <common.h>
#include <init.h>
#include <mci.h>
@@ -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
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next reply other threads:[~2013-10-15 17:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-15 17:38 Andre Heider [this message]
2013-10-16 7:32 ` Lucas Stach
2013-10-16 9:00 ` Andre Heider
2013-10-16 7:37 ` Sascha Hauer
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