[PATCH v4 1/7] ARM: OMAP2+: gpmc-nand: Set omap2-nand's parent dev to GPMC dev
From: Franklin S Cooper Jr <hidden>
Date: 2016-03-10 23:59:10
Also in:
linux-omap, lkml
Subsystem:
arm port, omap general purpose memory controller support, omap power management support, omap2+ support, the rest · Maintainers:
Russell King, Roger Quadros, Tony Lindgren, Kevin Hilman, Aaro Koskinen, Andreas Kemnade, Linus Torvalds
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 <redacted> --- 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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