linux-kernel - [PATCH 15/30] media: atmel: atmel-isc: add support for version register

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Message-ID: <20210401112723.189107-16-eugen.hristev@microchip.com>
Date:   Thu, 1 Apr 2021 14:27:08 +0300
From:   Eugen Hristev <eugen.hristev@...rochip.com>
To:     <devicetree@...r.kernel.org>, <linux-media@...r.kernel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Eugen Hristev <eugen.hristev@...rochip.com>
Subject: [PATCH 15/30] 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@...rochip.com>
---
 drivers/media/platform/atmel/atmel-isc-regs.h    | 5 +++++
 drivers/media/platform/atmel/atmel-isc.h         | 2 ++
 drivers/media/platform/atmel/atmel-sama5d2-isc.c | 5 +++++
 3 files changed, 12 insertions(+)

diff --git a/drivers/media/platform/atmel/atmel-isc-regs.h b/drivers/media/platform/atmel/atmel-isc-regs.h
index 4940998c82a2..344668dcfcf4 100644
--- 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 52a9199d65ee..676a5be1ee8c 100644
--- 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 f583288f0503..500618240fc2 100644
--- 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:
-- 
2.25.1