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media: atmel: atmel-isc: add support for version register

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Add support for version register and print it at probe time.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Eugen Hristev 2021-04-13 12:57:13 +02:00 committed by Mauro Carvalho Chehab
parent e891009857
commit d51470069e
3 changed files with 12 additions and 0 deletions
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5
drivers/media/platform/atmel/atmel-isc-regs.h
View File

@ -295,6 +295,11 @@
/* DMA Address 2 Register */
#define ISC_DAD2 0x000003fc
/* Offset for version register specific to sama5d2 product */
#define ISC_SAMA5D2_VERSION_OFFSET 0
/* Version Register */
#define ISC_VERSION 0x0000040c
/* Histogram Entry */
#define ISC_HIS_ENTRY 0x00000410

2
drivers/media/platform/atmel/atmel-isc.h
View File

@ -153,6 +153,7 @@ struct isc_ctrls {
* @rlp: Offset for the RLP register
* @his: Offset for the HIS related registers
* @dma: Offset for the DMA related registers
* @version: Offset for the version register
*/
struct isc_reg_offsets {
u32 csc;
@ -162,6 +163,7 @@ struct isc_reg_offsets {
u32 rlp;
u32 his;
u32 dma;
u32 version;
};
/*

5
drivers/media/platform/atmel/atmel-sama5d2-isc.c
View File

@ -189,6 +189,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
struct isc_subdev_entity *subdev_entity;
int irq;
int ret;
u32 ver;
isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL);
if (!isc)
@ -237,6 +238,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
isc->offsets.rlp = ISC_SAMA5D2_RLP_OFFSET;
isc->offsets.his = ISC_SAMA5D2_HIS_OFFSET;
isc->offsets.dma = ISC_SAMA5D2_DMA_OFFSET;
isc->offsets.version = ISC_SAMA5D2_VERSION_OFFSET;
/* sama5d2-isc - 8 bits per beat */
isc->dcfg = ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8;
@ -332,6 +334,9 @@ static int atmel_isc_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
pm_request_idle(dev);
regmap_read(isc->regmap, ISC_VERSION + isc->offsets.version, &ver);
dev_info(dev, "Microchip ISC version %x\n", ver);
return 0;
cleanup_subdev: