Commit 29f5b5a3 authored by Davide Ciminaghi's avatar Davide Ciminaghi Committed by Samuel Ortiz
Browse files

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: default avatarDavide Ciminaghi <ciminaghi@gnudd.com>
Acked-by: default avatarAlessandro Rubini <rubini@gnudd.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent d94e2553

drivers/mfd/sta2x11-mfd.c

+22 −0
Original line number Diff line number Diff line
@@ -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

 */

include/linux/mfd/sta2x11-mfd.h

+5 −0
Original line number Diff line number Diff line
@@ -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 */

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