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Subject[PATCH 1/3] mfd: allow mfd_cell association with device tree node
Date
This allows a mfd_cell to be linked with a device tree node, which
then allows child drivers to have easy access to that handle.

Signed-off-by: Daniel Drake <dsd@laptop.org>
---
drivers/mfd/mfd-core.c | 1 +
include/linux/mfd/core.h | 4 ++++
2 files changed, 5 insertions(+), 0 deletions(-)

I think this is what is being suggested at
http://lists.ozlabs.org/pipermail/devicetree-discuss/2011-September/008235.html

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 0902523..7d22dcd 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -87,6 +87,7 @@ static int mfd_add_device(struct device *parent, int id,
goto fail_device;

pdev->dev.parent = parent;
+ pdev->dev.of_node = cell->of_node;

if (cell->pdata_size) {
ret = platform_device_add_data(pdev,
diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h
index 4e76163..9b836f9 100644
--- a/include/linux/mfd/core.h
+++ b/include/linux/mfd/core.h
@@ -15,6 +15,7 @@
#define MFD_CORE_H

#include <linux/platform_device.h>
+#include <linux/of.h>

/*
* This struct describes the MFD part ("cell").
@@ -37,6 +38,9 @@ struct mfd_cell {
void *platform_data;
size_t pdata_size;

+ /* association with device tree node (optional) */
+ struct device_node *of_node;
+
/*
* These resources can be specified relative to the parent device.
* For accessing hardware you should use resources from the platform dev
--
1.7.6.2


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