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-rw-r--r--drivers/mtd/nand/Kconfig2
-rw-r--r--drivers/mtd/nand/fsl_upm.c17
2 files changed, 14 insertions, 5 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 7153854eb83a..18b9ffeabc98 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -401,7 +401,7 @@ config MTD_NAND_FSL_ELBC
config MTD_NAND_FSL_UPM
tristate "Support for NAND on Freescale UPM"
- depends on MTD_NAND && OF_GPIO && (PPC_83xx || PPC_85xx)
+ depends on MTD_NAND && (PPC_83xx || PPC_85xx)
select FSL_LBC
help
Enables support for NAND Flash chips wired onto Freescale PowerPC
diff --git a/drivers/mtd/nand/fsl_upm.c b/drivers/mtd/nand/fsl_upm.c
index 3af5ef399a0f..024e3fffd4bb 100644
--- a/drivers/mtd/nand/fsl_upm.c
+++ b/drivers/mtd/nand/fsl_upm.c
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/delay.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/mtd/partitions.h>
@@ -36,6 +37,7 @@ struct fsl_upm_nand {
uint8_t upm_cmd_offset;
void __iomem *io_base;
int rnb_gpio;
+ int chip_delay;
};
#define to_fsl_upm_nand(mtd) container_of(mtd, struct fsl_upm_nand, mtd)
@@ -58,10 +60,11 @@ static void fun_wait_rnb(struct fsl_upm_nand *fun)
if (fun->rnb_gpio >= 0) {
while (--cnt && !fun_chip_ready(&fun->mtd))
cpu_relax();
+ if (!cnt)
+ dev_err(fun->dev, "tired waiting for RNB\n");
+ } else {
+ ndelay(100);
}
-
- if (!cnt)
- dev_err(fun->dev, "tired waiting for RNB\n");
}
static void fun_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
@@ -129,7 +132,7 @@ static int __devinit fun_chip_init(struct fsl_upm_nand *fun,
fun->chip.IO_ADDR_R = fun->io_base;
fun->chip.IO_ADDR_W = fun->io_base;
fun->chip.cmd_ctrl = fun_cmd_ctrl;
- fun->chip.chip_delay = 50;
+ fun->chip.chip_delay = fun->chip_delay;
fun->chip.read_byte = fun_read_byte;
fun->chip.read_buf = fun_read_buf;
fun->chip.write_buf = fun_write_buf;
@@ -228,6 +231,12 @@ static int __devinit fun_probe(struct of_device *ofdev,
goto err2;
}
+ prop = of_get_property(ofdev->node, "chip-delay", NULL);
+ if (prop)
+ fun->chip_delay = *prop;
+ else
+ fun->chip_delay = 50;
+
fun->io_base = devm_ioremap_nocache(&ofdev->dev, io_res.start,
io_res.end - io_res.start + 1);
if (!fun->io_base) {