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| author | Wenyou Yang <wenyou.yang@microchip.com> | 2017-10-10 04:46:37 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2017-10-27 13:56:05 +0200 |
| commit | 64f6306a5af21561ad6b9a3247fc68126b8be88a (patch) | |
| tree | 5446eeb015fd6ac2cbbcba362c75cf5b4f71d74d /drivers/media/platform/atmel/atmel-isc-regs.h | |
| parent | cab1dea3be2e51578032c5aee6ac13ff7b4aaeb4 (diff) | |
| download | linux-64f6306a5af21561ad6b9a3247fc68126b8be88a.tar.bz2 | |
media: atmel-isc: Add prepare and unprepare ops
A software write operation to the ISC_CLKEN or ISC_CLKDIS register
requires double clock domain synchronization and is not permitted
when the ISC_SR.SIP is asserted. So add the .prepare and .unprepare
ops to make sure the ISC_CLKSR.SIP is unasserted before the write
operation to the ISC_CLKEN or ISC_CLKDIS register.
Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/platform/atmel/atmel-isc-regs.h')
| -rw-r--r-- | drivers/media/platform/atmel/atmel-isc-regs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/media/platform/atmel/atmel-isc-regs.h b/drivers/media/platform/atmel/atmel-isc-regs.h index 6936ac467609..93e58fcf1d5f 100644 --- a/drivers/media/platform/atmel/atmel-isc-regs.h +++ b/drivers/media/platform/atmel/atmel-isc-regs.h @@ -42,6 +42,7 @@ /* ISC Clock Status Register */ #define ISC_CLKSR 0x00000020 +#define ISC_CLKSR_SIP BIT(31) #define ISC_CLK(n) BIT(n) |