Patchwork [2/3] ARM: OMAP2+: gpmc-nand: Modify Interrupt handling

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Submitter Mohammed Afzal
Date May 15, 2012, 2:38 p.m.
Message ID <04d71e243e5896f06f048fdc5259c3257815f34d.1337090835.git.afzal@ti.com>
Download mbox | patch
Permalink /patch/159363/
State Not Applicable
Headers show

Comments

Mohammed Afzal - May 15, 2012, 2:38 p.m.
Now GPMC provides its client with interrupts that can be handled
using the standard interrupt API. Modify GPMC NAND setup to work
with it.

Also disable write protect in GPMC code, so that NAND driver can
be ignorant of GPMC configuration.

This helps in smooth migration of GPMC to driver.

Signed-off-by: Afzal Mohammed <afzal@ti.com>
---
 arch/arm/mach-omap2/gpmc-nand.c |   28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

Patch

diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c
index c0320d2..e58f450 100644
--- a/arch/arm/mach-omap2/gpmc-nand.c
+++ b/arch/arm/mach-omap2/gpmc-nand.c
@@ -21,15 +21,25 @@ 
 #include <plat/board.h>
 #include <plat/gpmc.h>
 
-static struct resource gpmc_nand_resource = {
-	.flags		= IORESOURCE_MEM,
+static struct resource gpmc_nand_resource[] = {
+	{
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.name		= "fifoevent",
+		.flags		= IORESOURCE_IRQ,
+	},
+	{
+		.name		= "terminalcount",
+		.flags		= IORESOURCE_IRQ,
+	},
 };
 
 static struct platform_device gpmc_nand_device = {
 	.name		= "omap2-nand",
 	.id		= 0,
-	.num_resources	= 1,
-	.resource	= &gpmc_nand_resource,
+	.num_resources	= ARRAY_SIZE(gpmc_nand_resource),
+	.resource	= gpmc_nand_resource,
 };
 
 static int omap2_nand_gpmc_retime(struct omap_nand_platform_data *gpmc_nand_data)
@@ -75,6 +85,7 @@  static int omap2_nand_gpmc_retime(struct omap_nand_platform_data *gpmc_nand_data
 		gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 0);
 	gpmc_cs_configure(gpmc_nand_data->cs,
 			GPMC_CONFIG_DEV_TYPE, GPMC_DEVICETYPE_NAND);
+	gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_WP, 0);
 	err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t);
 	if (err)
 		return err;
@@ -90,14 +101,19 @@  int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data)
 	gpmc_nand_device.dev.platform_data = gpmc_nand_data;
 
 	err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
-				(unsigned long *)&gpmc_nand_resource.start);
+				(unsigned long *)&gpmc_nand_resource[0].start);
 	if (err < 0) {
 		dev_err(dev, "Cannot request GPMC CS\n");
 		return err;
 	}
 
-	gpmc_nand_resource.end = gpmc_nand_resource.start + NAND_IO_SIZE - 1;
+	gpmc_nand_resource[0].end = gpmc_nand_resource[0].start +
+							NAND_IO_SIZE - 1;
 
+	gpmc_nand_resource[1].start =
+				gpmc_get_client_irq(GPMC_IRQ_FIFOEVENTENABLE);
+	gpmc_nand_resource[2].start =
+				gpmc_get_client_irq(GPMC_IRQ_COUNT_EVENT);
 	 /* Set timings in GPMC */
 	err = omap2_nand_gpmc_retime(gpmc_nand_data);
 	if (err < 0) {