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ARM: rpi: fix reading of the EMMC clock for CONFIG_MMU 

Add explicit flushing to prevent the 50MHz fallback.

Signed-off-by: Andre Heider <a.heider@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Andre Heider 2013-10-15 19:38:23 +02:00 committed by Sascha Hauer
parent 64bf420013
commit 43efd0e84f
1 changed files with 6 additions and 1 deletions
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7
drivers/mci/mci-bcm2835.c
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@ -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, &regs->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)