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| author |   Heiner Kallweit <hkallweit1@gmail.com> | 2015-12-30 14:39:22 -0200 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-01-25 15:44:06 -0200 |
| commit | 3def9ad6d3066e597d0ce86801a81eedb130b04a (patch) | |
| tree | 5b5ec10b24709bf6fb471efb19ae17c05a4f0aee /drivers/media/rc/nuvoton-cir.c | |
| parent | [media] msi2500: Delete an unnecessary check in msi2500_set_usb_adc() (diff) | |
| download | linux-dev-3def9ad6d3066e597d0ce86801a81eedb130b04a.tar.xz linux-dev-3def9ad6d3066e597d0ce86801a81eedb130b04a.zip | |
[media] nuvoton-cir: use request_muxed_region for accessing EFM registers
The two EFM ioports are accessed by drivers for other parts of the Nuvoton
Super-IO chips too. Therefore access to these ioports needs to be
protected by using request_muxed_region (like it's implemented e.g. in
hwmon/nct6775 already).
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/rc/nuvoton-cir.c')
| -rw-r--r-- | drivers/media/rc/nuvoton-cir.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c index 081435cda30c..62c82c54ec82 100644 --- a/drivers/media/rc/nuvoton-cir.c +++ b/drivers/media/rc/nuvoton-cir.c @@ -80,17 +80,24 @@ static inline void nvt_clear_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg) } /* enter extended function mode */ -static inline void nvt_efm_enable(struct nvt_dev *nvt) +static inline int nvt_efm_enable(struct nvt_dev *nvt) { + if (!request_muxed_region(nvt->cr_efir, 2, NVT_DRIVER_NAME)) + return -EBUSY; + /* Enabling Extended Function Mode explicitly requires writing 2x */ outb(EFER_EFM_ENABLE, nvt->cr_efir); outb(EFER_EFM_ENABLE, nvt->cr_efir); + + return 0; } /* exit extended function mode */ static inline void nvt_efm_disable(struct nvt_dev *nvt) { outb(EFER_EFM_DISABLE, nvt->cr_efir); + + release_region(nvt->cr_efir, 2); } /* |