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From 0939b0a92acca11a5a3b0de5dd70434e17e40ed3 Mon Sep 17 00:00:00 2001
From: Eugen Hristev <eugen.hristev@microchip.com>
Date: Tue, 13 Apr 2021 12:57:13 +0200
Subject: [PATCH 171/247] 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>
---
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(+)
--- 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
--- a/drivers/media/platform/atmel/atmel-isc.h
+++ b/drivers/media/platform/atmel/atmel-isc.h
@@ -152,6 +152,7 @@ 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;
@@ -161,6 +162,7 @@ struct isc_reg_offsets {
u32 rlp;
u32 his;
u32 dma;
+ u32 version;
};
/*
--- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
+++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
@@ -210,6 +210,7 @@ static int atmel_isc_probe(struct platfo
struct isc_subdev_entity *subdev_entity;
int irq;
int ret;
+ u32 ver;
isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL);
if (!isc)
@@ -258,6 +259,7 @@ static int atmel_isc_probe(struct platfo
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;
@@ -346,6 +348,9 @@ static int atmel_isc_probe(struct platfo
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:
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