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authorBoris Brezillon <boris.brezillon@free-electrons.com>2015-01-22 18:21:30 +0800
committerBrian Norris <computersforpeace@gmail.com>2015-03-11 09:49:28 -0700
commit111573ccd89b67fdef64d945cc0e611df85a6ac8 (patch)
treeec40f8cf07fb775985097824a95a42f4d04d579c /drivers/mtd
parent393d23c4e22996ad0c694577927bcf13ba31beda (diff)
downloadlinux-111573ccd89b67fdef64d945cc0e611df85a6ac8.tar.gz
mtd: atmel_nand: check NFC busy flag by HSMC_SR instead of NFC cmd regs
Currently the driver read NFC command registers to get NFC busy flag. Actually this flag also can be get by reading HSMC_SR register. Use the read NFC command registers need mapping a huge memory region. To save the mapped memory region, we change to check NFC busy flag by reading HSMC_SR register. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Josh Wu <josh.wu@atmel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/atmel_nand.c5
-rw-r--r--drivers/mtd/nand/atmel_nand_nfc.h1
2 files changed, 3 insertions, 3 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 13104507da63..feaac9099bb9 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -1752,11 +1752,10 @@ static int nfc_send_command(struct atmel_nand_host *host,
cmd, addr, cycle0);
timeout = jiffies + msecs_to_jiffies(NFC_TIME_OUT_MS);
- while (nfc_cmd_readl(NFCADDR_CMD_NFCBUSY, host->nfc->base_cmd_regs)
- & NFCADDR_CMD_NFCBUSY) {
+ while (nfc_readl(host->nfc->hsmc_regs, SR) & NFC_SR_BUSY) {
if (time_after(jiffies, timeout)) {
dev_err(host->dev,
- "Time out to wait CMD_NFCBUSY ready!\n");
+ "Time out to wait for NFC ready!\n");
return -ETIMEDOUT;
}
}
diff --git a/drivers/mtd/nand/atmel_nand_nfc.h b/drivers/mtd/nand/atmel_nand_nfc.h
index 85b8ca6af7d2..4d5d26221a7e 100644
--- a/drivers/mtd/nand/atmel_nand_nfc.h
+++ b/drivers/mtd/nand/atmel_nand_nfc.h
@@ -35,6 +35,7 @@
#define NFC_CTRL_DISABLE (1 << 1)
#define ATMEL_HSMC_NFC_SR 0x08 /* NFC Status Register */
+#define NFC_SR_BUSY (1 << 8)
#define NFC_SR_XFR_DONE (1 << 16)
#define NFC_SR_CMD_DONE (1 << 17)
#define NFC_SR_DTOE (1 << 20)