at91: add kernel support for sama7g5 soc

Add kernel support for SAMA7G5 by back-porting mainline kernel patches.
Among SAMA7G5 features could be remembered:
- ARM Cortex-A7
- double data rate multi-port dynamic RAM controller supporting DDR2,
  DDR3, DDR3L, LPDDR2, LPDDR3 up to 533MHz
- peripherals for audio, video processing
- 1 gigabit + 1 megabit Ethernet controllers
- 6 CAN controllers
- trust zone support
- DVFS for CPU
- criptography IPs

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/target/linux/at91/patches-5.10/167-media-atmel-atmel-isc-add-SUB422-and-SUB420-to-regis.patch b/target/linux/at91/patches-5.10/167-media-atmel-atmel-isc-add-SUB422-and-SUB420-to-regis.patch
new file mode 100644
index 0000000000..d4d6f2ea45
--- /dev/null
+++ b/target/linux/at91/patches-5.10/167-media-atmel-atmel-isc-add-SUB422-and-SUB420-to-regis.patch
@@ -0,0 +1,91 @@
+From aebb741058a63c3493f4139d11d6f290d5691e9b Mon Sep 17 00:00:00 2001
+From: Eugen Hristev <eugen.hristev@microchip.com>
+Date: Tue, 13 Apr 2021 12:57:09 +0200
+Subject: [PATCH 167/247] media: atmel: atmel-isc: add SUB422 and SUB420 to
+ register offsets
+
+The SUB submodules are a part of the atmel-isc pipeline, and stand for
+Subsampling. They are used to subsample the original YUV 4:4:4 pixel ratio
+aspect to either 4:2:2 or 4:2:0.
+Add sub420 and sub422 to the reg offsets struct.
+This will allow different products to have a different reg offset for these
+particular modules.
+
+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-base.c    | 4 ++--
+ drivers/media/platform/atmel/atmel-isc-regs.h    | 4 ++++
+ drivers/media/platform/atmel/atmel-isc.h         | 4 ++++
+ drivers/media/platform/atmel/atmel-sama5d2-isc.c | 2 ++
+ 4 files changed, 12 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c
+index b7728914fda8..b398cdfdc2c9 100644
+--- a/drivers/media/platform/atmel/atmel-isc-base.c
++++ b/drivers/media/platform/atmel/atmel-isc-base.c
+@@ -2326,8 +2326,8 @@ int isc_pipeline_init(struct isc_device *isc)
+ 		REG_FIELD(ISC_GAM_CTRL, 3, 3),
+ 		REG_FIELD(ISC_CSC_CTRL + isc->offsets.csc, 0, 0),
+ 		REG_FIELD(ISC_CBC_CTRL + isc->offsets.cbc, 0, 0),
+-		REG_FIELD(ISC_SUB422_CTRL, 0, 0),
+-		REG_FIELD(ISC_SUB420_CTRL, 0, 0),
++		REG_FIELD(ISC_SUB422_CTRL + isc->offsets.sub422, 0, 0),
++		REG_FIELD(ISC_SUB420_CTRL + isc->offsets.sub420, 0, 0),
+ 	};
+ 
+ 	for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
+diff --git a/drivers/media/platform/atmel/atmel-isc-regs.h b/drivers/media/platform/atmel/atmel-isc-regs.h
+index a5e2fe01ba9f..04839def6ef6 100644
+--- a/drivers/media/platform/atmel/atmel-isc-regs.h
++++ b/drivers/media/platform/atmel/atmel-isc-regs.h
+@@ -194,9 +194,13 @@
+ #define ISC_CBC_CONTRAST	0x000003c0
+ #define ISC_CBC_CONTRAST_MASK	GENMASK(11, 0)
+ 
++/* Offset for SUB422 register specific to sama5d2 product */
++#define ISC_SAMA5D2_SUB422_OFFSET	0
+ /* Subsampling 4:4:4 to 4:2:2 Control Register */
+ #define ISC_SUB422_CTRL 0x000003c4
+ 
++/* Offset for SUB420 register specific to sama5d2 product */
++#define ISC_SAMA5D2_SUB420_OFFSET	0
+ /* Subsampling 4:2:2 to 4:2:0 Control Register */
+ #define ISC_SUB420_CTRL 0x000003cc
+ 
+diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h
+index d8b4b1959b94..9eb85540d89d 100644
+--- a/drivers/media/platform/atmel/atmel-isc.h
++++ b/drivers/media/platform/atmel/atmel-isc.h
+@@ -147,10 +147,14 @@ struct isc_ctrls {
+  * struct isc_reg_offsets - ISC device register offsets
+  * @csc:		Offset for the CSC register
+  * @cbc:		Offset for the CBC register
++ * @sub422:		Offset for the SUB422 register
++ * @sub420:		Offset for the SUB420 register
+  */
+ struct isc_reg_offsets {
+ 	u32 csc;
+ 	u32 cbc;
++	u32 sub422;
++	u32 sub420;
+ };
+ 
+ /*
+diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
+index bb9362093efe..57ea1ae50c44 100644
+--- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
++++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
+@@ -253,6 +253,8 @@ static int atmel_isc_probe(struct platform_device *pdev)
+ 
+ 	isc->offsets.csc = ISC_SAMA5D2_CSC_OFFSET;
+ 	isc->offsets.cbc = ISC_SAMA5D2_CBC_OFFSET;
++	isc->offsets.sub422 = ISC_SAMA5D2_SUB422_OFFSET;
++	isc->offsets.sub420 = ISC_SAMA5D2_SUB420_OFFSET;
+ 
+ 	/* sama5d2-isc - 8 bits per beat */
+ 	isc->dcfg = ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8;
+-- 
+2.32.0
+