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authorDavide Ciminaghi <ciminaghi@gnudd.com>2012-11-09 15:19:54 +0100
committerSamuel Ortiz <sameo@linux.intel.com>2012-11-20 12:21:14 +0100
commit29f5b5a326b44c55e81b15308255ba695fecb323 (patch)
treed99b8093108c626e15ee7e6b7a2241bb5615fa50 /drivers/mfd/sta2x11-mfd.c
parentd94e25535a7979a6c81922496f475a5dd0e006b4 (diff)
downloadlinux-linaro-stable-29f5b5a326b44c55e81b15308255ba695fecb323.tar.gz
mfd: sta2x11-mfd: Add sta2x11_mfd_get_regs_data() function
A couple of predefined clocks (mux and gated) need to be initialized with the virtual address of the clock's controlling register and the address of a spinlock used to protect against races. This function exports such data for all the mfd cells. Signed-off-by: Davide Ciminaghi <ciminaghi@gnudd.com> Acked-by: Alessandro Rubini <rubini@gnudd.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/sta2x11-mfd.c')
-rw-r--r--drivers/mfd/sta2x11-mfd.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/mfd/sta2x11-mfd.c b/drivers/mfd/sta2x11-mfd.c
index 0cac2013bbf6..6d12ab42aba3 100644
--- a/drivers/mfd/sta2x11-mfd.c
+++ b/drivers/mfd/sta2x11-mfd.c
@@ -135,6 +135,28 @@ u32 __sta2x11_mfd_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val,
}
EXPORT_SYMBOL(__sta2x11_mfd_mask);
+int sta2x11_mfd_get_regs_data(struct platform_device *dev,
+ enum sta2x11_mfd_plat_dev index,
+ void __iomem **regs,
+ spinlock_t **lock)
+{
+ struct pci_dev *pdev = *(struct pci_dev **)(dev->dev.platform_data);
+ struct sta2x11_mfd *mfd;
+
+ if (!pdev)
+ return -ENODEV;
+ mfd = sta2x11_mfd_find(pdev);
+ if (!mfd)
+ return -ENODEV;
+ if (index >= sta2x11_n_mfd_plat_devs)
+ return -ENODEV;
+ *regs = mfd->regs[index];
+ *lock = &mfd->lock[index];
+ pr_debug("%s %d *regs = %p\n", __func__, __LINE__, *regs);
+ return *regs ? 0 : -ENODEV;
+}
+EXPORT_SYMBOL(sta2x11_mfd_get_regs_data);
+
/*
* Special sta2x11-mfd regmap lock/unlock functions
*/