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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>
This commit is contained in:
Davide Ciminaghi 2012-11-09 15:19:54 +01:00 committed by Samuel Ortiz
parent d94e25535a
commit 29f5b5a326
2 changed files with 27 additions and 0 deletions
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22
drivers/mfd/sta2x11-mfd.c
View File

@ -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
*/

5
include/linux/mfd/sta2x11-mfd.h
View File

@ -474,4 +474,9 @@ u32 sta2x11_apb_soc_regs_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val)
#define COMPENSATION_REG3 0x3cc
#define TEST_CTL_REG 0x3d0
extern int sta2x11_mfd_get_regs_data(struct platform_device *pdev,
enum sta2x11_mfd_plat_dev index,
void __iomem **regs,
spinlock_t **lock);
#endif /* __STA2X11_MFD_H */