-Original Message-
From: Tony Lindgren [mailto:t...@atomide.com]
Sent: Wednesday, September 29, 2010 4:00 AM
To: Ghorai, Sukumar
Cc: linux-omap@vger.kernel.org; linux-...@lists.infradead.org; linux-arm-
ker...@lists.infradead.org; Vimal Singh
Subject: Re: [PATCH v5 2/5] omap3: nand: prefetch in irq mode support
* Sukumar Ghorai s-gho...@ti.com [100927 06:30]:
This patch enable prefetch-irq mode for NAND.
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -112,6 +112,9 @@ config MTD_NAND_OMAP_PREFETCH
help
The NAND device can be accessed for Read/Write using GPMC PREFETCH
engine
to improve the performance.
+GPMC PREFETCH can be configured eigther in MPU interrupt mode or in
DMA
+interrupt mode. If not selected any of them prefetch will be used
in
+polling mode.
config MTD_NAND_OMAP_PREFETCH_DMA
depends on MTD_NAND_OMAP_PREFETCH
@@ -120,7 +123,16 @@ config MTD_NAND_OMAP_PREFETCH_DMA
help
The GPMC PREFETCH engine can be configured eigther in MPU interrupt
mode
or in DMA interrupt mode.
-Say y for DMA mode or MPU mode will be used
+Say y for DMA mode
+
+config MTD_NAND_OMAP_PREFETCH_IRQ
+ depends on MTD_NAND_OMAP_PREFETCH !MTD_NAND_OMAP_PREFETCH_DMA
+ bool IRQ mode
+ default n
+ help
+The GPMC PREFETCH engine can be configured eigther in MPU interrupt
mode
+or in DMA interrupt mode.
+Say y for IRQ mode
config MTD_NAND_IDS
tristate
The configuration to use the prefetch IRQ should be passed in the
platform_data
from the board-*.c files. What if you want to to boot a distro kernel on
omap2, 3 and 4 and only some of the boards can use the prefetch interrupt?
[Ghorai] thanks.. we will provide the interface to select the io mode and ecc
mode from board file.
Tony
--
To unsubscribe from this list: send the line unsubscribe linux-omap in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
