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Date: Mon, 5 Nov 2012 15:48:22 +0100 From: Lars Poeschel <larsi@....tu-dresden.de> To: linus.walleij@...aro.org Cc: poeschel@...onage.de, sameo@...ux.intel.com, linux-kernel@...r.kernel.org, jic23@....ac.uk, khali@...ux-fr.org, ben-linux@...ff.org, w.sang@...gutronix.de, grant.likely@...retlab.ca, linux-iio@...r.kernel.org Subject: [PATCH v3 1/5] mfd: set device type of mfd platform devices to a mfd type From: Lars Poeschel <poeschel@...onage.de> This sets the type of the platform devices that are added to the mfd core to some mfd-cell type. This enables us to add mfd cells to platform devices, that are in use by other cores (e.g. the usb core). Otherwise by removing the mfd cell from a platform device that already has some "childs" would remove all childs, not only the mfd ones. Thanks to Lars-Peter Clausen for proposing this. Signed-off-by: Lars Poeschel <poeschel@...onage.de> --- drivers/mfd/mfd-core.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c index f8b7771..d317b50 100644 --- a/drivers/mfd/mfd-core.c +++ b/drivers/mfd/mfd-core.c @@ -21,6 +21,10 @@ #include <linux/irqdomain.h> #include <linux/of.h> +static struct device_type const mfd_device_type = { + .name = "mfd-cell", +}; + int mfd_cell_enable(struct platform_device *pdev) { const struct mfd_cell *cell = mfd_get_cell(pdev); @@ -91,6 +95,7 @@ static int mfd_add_device(struct device *parent, int id, goto fail_device; pdev->dev.parent = parent; + pdev->dev.type = &mfd_device_type; if (parent->of_node && cell->of_compatible) { for_each_child_of_node(parent->of_node, np) { @@ -204,10 +209,16 @@ EXPORT_SYMBOL(mfd_add_devices); static int mfd_remove_devices_fn(struct device *dev, void *c) { - struct platform_device *pdev = to_platform_device(dev); - const struct mfd_cell *cell = mfd_get_cell(pdev); + struct platform_device *pdev; + const struct mfd_cell *cell; atomic_t **usage_count = c; + if (dev->type != &mfd_device_type) + return 0; + + pdev = to_platform_device(dev); + cell = mfd_get_cell(pdev); + /* find the base address of usage_count pointers (for freeing) */ if (!*usage_count || (cell->usage_count < *usage_count)) *usage_count = cell->usage_count; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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