The patch titled
mmc: fix clock-off in PXA255/270
has been added to the -mm tree. Its filename is
mmc-fix-clock-off-in-pxa255-270.patch
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------------------------------------------------------
Subject: mmc: fix clock-off in PXA255/270
From: rifx <rifx@xxxxx>
It solves the problems with clock-off in the PXA255/270 MMC/SD hardware. This
solution was tested with our devices and works good.
Cc: Pierre Ossman <drzeus-list@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/pxamci.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff -puN drivers/mmc/host/pxamci.c~mmc-fix-clock-off-in-pxa255-270 drivers/mmc/host/pxamci.c
--- a/drivers/mmc/host/pxamci.c~mmc-fix-clock-off-in-pxa255-270
+++ a/drivers/mmc/host/pxamci.c
@@ -26,6 +26,7 @@
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
#include <asm/dma.h>
#include <asm/io.h>
@@ -69,6 +70,8 @@ struct pxamci_host {
unsigned int dma_drcmrtx;
};
+static int local_cmd = -1;
+
static void pxamci_stop_clock(struct pxamci_host *host)
{
if (readl(host->base + MMC_STAT) & STAT_CLK_EN) {
@@ -86,6 +89,7 @@ static void pxamci_stop_clock(struct pxa
if (v & STAT_CLK_EN)
dev_err(mmc_dev(host->mmc), "unable to stop clock\n");
+ local_cmd = -1;
}
}
@@ -234,6 +238,14 @@ static int pxamci_cmd_done(struct pxamci
v = w2;
}
+ local_cmd = cmd->opcode;
+ if ((local_cmd == MMC_GO_IDLE_STATE) ||
+ (local_cmd == MMC_GO_INACTIVE_STATE) ||
+ (local_cmd == MMC_SEND_STATUS) ||
+ (local_cmd == MMC_STOP_TRANSMISSION) ||
+ (local_cmd == MMC_SET_BLOCKLEN)
+ ) pxamci_stop_clock(host);
+
if (stat & STAT_TIME_OUT_RESPONSE) {
cmd->error = -ETIMEDOUT;
} else if (stat & STAT_RES_CRC_ERR && cmd->flags & MMC_RSP_CRC) {
@@ -292,7 +304,7 @@ static int pxamci_data_done(struct pxamc
host->data = NULL;
if (host->mrq->stop) {
- pxamci_stop_clock(host);
+ //pxamci_stop_clock(host);
pxamci_start_cmd(host, host->mrq->stop, host->cmdat);
} else {
pxamci_finish_request(host, host->mrq);
_
Patches currently in -mm which might be from rifx@xxxxx are
mmc-fix-clock-off-in-pxa255-270.patch
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