[PATCH v4 1/7] ARM: OMAP2+: gpmc-nand: Set omap2-nand's parent dev to GPMC dev

Franklin S Cooper Jr
2016-03-10T23:56:37Z

The dma channel information is located within the GPMC node which is the
NAND's parent node. The NAND driver requires a handle to the GPMC's dev
to properly parse the DMA properties. Therefore, set the NAND's parent dev
to the GPMC's dev so it can be referenced within the driver.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
---
Version 4 changes:
Instead of storing the GPMC dev in a new property simply grab a reference
to it and set omap2-nand's dev.parent to it.

arch/arm/mach-omap2/gpmc-nand.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c
index 72918c4..77e453c 100644
--- a/arch/arm/mach-omap2/gpmc-nand.c
+++ b/arch/arm/mach-omap2/gpmc-nand.c
@@ -15,6 +15,7 @@
#include <linux/omap-gpmc.h>
#include <linux/mtd/nand.h>
#include <linux/platform_data/mtd-nand-omap2.h>
+#include <linux/of_platform.h>

#include <asm/mach/flash.h>

@@ -77,6 +78,9 @@ int gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data,
int err = 0;
struct gpmc_settings s;
struct platform_device *pdev;
+ struct platform_device *gpmc_dev;
+ struct device_node *gpmc_node;
+
struct resource gpmc_nand_res[] = {
{ .flags = IORESOURCE_MEM, },
{ .flags = IORESOURCE_IRQ, },
@@ -134,8 +138,18 @@ int gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data,
if (pdev) {
err = platform_device_add_resources(pdev, gpmc_nand_res,
ARRAY_SIZE(gpmc_nand_res));
- if (!err)
+ if (!err) {
pdev->dev.platform_data = gpmc_nand_data;
+
+ gpmc_node = of_get_parent(gpmc_nand_data->of_node);
+
+ if (gpmc_node) {
+ gpmc_dev = of_find_device_by_node(gpmc_node);
+
+ if (gpmc_dev)
+ pdev->dev.parent = &gpmc_dev->dev;
+ }
+ }
} else {
err = -ENOMEM;
}
--
2.7.0

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