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

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>

diff --git a/drivers/media/platform/atmel/atmel-isc-regs.h b/drivers/media/platform/atmel/atmel-isc-regs.h
index 4940998c82a2cb9ef2601286aff96b0e6feeb7f2..344668dcfcf4cd2b5edf505ccef68cac310220b2 100644 (file)
--- a/drivers/media/platform/atmel/atmel-isc-regs.h
+++ b/drivers/media/platform/atmel/atmel-isc-regs.h
@@ -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
 

diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h
index 52a9199d65ee13a5baa2999affecbe6bc61e5b26..676a5be1ee8ca587f527f59c9ab7daa80aa26785 100644 (file)
--- a/drivers/media/platform/atmel/atmel-isc.h
+++ b/drivers/media/platform/atmel/atmel-isc.h
@@ -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;
 };
 
 /*

diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
index 0b31dcf1443b367f655c92d7b93e0a54883cc561..059dc5d3c664797e000c8db94527ef2e2ad808e7 100644 (file)
--- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
+++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
@@ -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: