[ARM] 5400/1: Add support for inverted rdy_busy pin for Atmel nand device controller

Add support for inverted rdy_busy pin for Atmel nand device controller
It will fix building error on NeoCore926 board.

Acked-by: Andrew Victor <linux@maxim.org.za>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Gregory CLEMENT <gclement@adeneo.adetelgroup.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h
index fb51f0e..0b3ae21 100644 (file)
--- a/arch/arm/mach-at91/include/mach/board.h
+++ b/arch/arm/mach-at91/include/mach/board.h
@@ -93,6 +93,7 @@ struct atmel_nand_data {
        u8              enable_pin;     /* chip enable */
        u8              det_pin;        /* card detect */
        u8              rdy_pin;        /* ready/busy */
+       u8              rdy_pin_active_low;     /* rdy_pin value is inverted */
        u8              ale;            /* address line number connected to ALE */
        u8              cle;            /* address line number connected to CLE */
        u8              bus_width_16;   /* buswidth is 16 bit */

diff --git a/arch/avr32/mach-at32ap/include/mach/board.h b/arch/avr32/mach-at32ap/include/mach/board.h
index aafaf7a..cff8e84 100644 (file)
--- a/arch/avr32/mach-at32ap/include/mach/board.h
+++ b/arch/avr32/mach-at32ap/include/mach/board.h
@@ -116,6 +116,7 @@ struct atmel_nand_data {
        int     enable_pin;     /* chip enable */
        int     det_pin;        /* card detect */
        int     rdy_pin;        /* ready/busy */
+       u8      rdy_pin_active_low;     /* rdy_pin value is inverted */
        u8      ale;            /* address line number connected to ALE */
        u8      cle;            /* address line number connected to CLE */
        u8      bus_width_16;   /* buswidth is 16 bit */

diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index c98c157..47a33ce 100644 (file)
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -139,7 +139,8 @@ static int atmel_nand_device_ready(struct mtd_info *mtd)
        struct nand_chip *nand_chip = mtd->priv;
        struct atmel_nand_host *host = nand_chip->priv;
 
-       return gpio_get_value(host->board->rdy_pin);
+       return gpio_get_value(host->board->rdy_pin) ^
+                !!host->board->rdy_pin_active_low;
 }
 
 /*