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, 144 insertions, 0 deletions

diff --git a/target/linux/at91/patches-5.10/190-media-atmel-fix-build-when-ISC-m-and-XISC-y.patch b/target/linux/at91/patches-5.10/190-media-atmel-fix-build-when-ISC-m-and-XISC-y.patch
new file mode 100644
index 0000000000..f4d7bacdb4
--- /dev/null
+++ b/target/linux/at91/patches-5.10/190-media-atmel-fix-build-when-ISC-m-and-XISC-y.patch
@@ -0,0 +1,144 @@
+From dfcc0395f5e838c0b5c3fb93c9335b6a8892178a Mon Sep 17 00:00:00 2001
+From: Eugen Hristev <eugen.hristev@microchip.com>
+Date: Mon, 5 Jul 2021 14:57:08 +0200
+Subject: [PATCH 190/247] media: atmel: fix build when ISC=m and XISC=y
+
+Building VIDEO_ATMEL_ISC as module and VIDEO_ATMEL_XISC as built-in
+(or viceversa) causes build errors:
+
+ or1k-linux-ld: drivers/media/platform/atmel/atmel-isc-base.o: in function `isc_async_complete':
+ atmel-isc-base.c:(.text+0x40d0): undefined reference to `__this_module'
+ or1k-linux-ld: atmel-isc-base.c:(.text+0x40f0): undefined reference to `__this_module'
+ or1k-linux-ld: drivers/media/platform/atmel/atmel-isc-base.o:(.rodata+0x390): undefined reference to `__this_module'
+ or1k-linux-ld: drivers/media/platform/atmel/atmel-isc-base.o:(__param+0x4): undefined reference to `__this_module'
+ or1k-linux-ld: drivers/media/platform/atmel/atmel-isc-base.o:(__param+0x18): undefined reference to `__this_module'
+
+This is caused by the file atmel-isc-base.c which is common code between
+the two drivers.
+
+The solution is to create another Kconfig symbol that is automatically
+selected and generates the module atmel-isc-base.ko. This module can be
+loaded when both drivers are modules, or built-in when at least one of them
+is built-in.
+
+Reported-by: kernel test robot <lkp@intel.com>
+Fixes: c9aa973884a1 ("media: atmel: atmel-isc: add microchip-xisc driver")
+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/Kconfig          |  8 ++++++++
+ drivers/media/platform/atmel/Makefile         |  5 +++--
+ drivers/media/platform/atmel/atmel-isc-base.c | 11 +++++++++++
+ 3 files changed, 22 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/media/platform/atmel/Kconfig b/drivers/media/platform/atmel/Kconfig
+index 99b51213f871..dda2f27da317 100644
+--- a/drivers/media/platform/atmel/Kconfig
++++ b/drivers/media/platform/atmel/Kconfig
+@@ -8,6 +8,7 @@ config VIDEO_ATMEL_ISC
+ 	select VIDEOBUF2_DMA_CONTIG
+ 	select REGMAP_MMIO
+ 	select V4L2_FWNODE
++	select VIDEO_ATMEL_ISC_BASE
+ 	help
+ 	   This module makes the ATMEL Image Sensor Controller available
+ 	   as a v4l2 device.
+@@ -19,10 +20,17 @@ config VIDEO_ATMEL_XISC
+ 	select VIDEOBUF2_DMA_CONTIG
+ 	select REGMAP_MMIO
+ 	select V4L2_FWNODE
++	select VIDEO_ATMEL_ISC_BASE
+ 	help
+ 	   This module makes the ATMEL eXtended Image Sensor Controller
+ 	   available as a v4l2 device.
+ 
++config VIDEO_ATMEL_ISC_BASE
++	tristate
++	default n
++	help
++	  ATMEL ISC and XISC common code base.
++
+ config VIDEO_ATMEL_ISI
+ 	tristate "ATMEL Image Sensor Interface (ISI) support"
+ 	depends on VIDEO_V4L2 && OF
+diff --git a/drivers/media/platform/atmel/Makefile b/drivers/media/platform/atmel/Makefile
+index c5c01556c653..46d264ab7948 100644
+--- a/drivers/media/platform/atmel/Makefile
++++ b/drivers/media/platform/atmel/Makefile
+@@ -1,7 +1,8 @@
+ # SPDX-License-Identifier: GPL-2.0-only
+-atmel-isc-objs = atmel-sama5d2-isc.o atmel-isc-base.o
+-atmel-xisc-objs = atmel-sama7g5-isc.o atmel-isc-base.o
++atmel-isc-objs = atmel-sama5d2-isc.o
++atmel-xisc-objs = atmel-sama7g5-isc.o
+ 
+ obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
++obj-$(CONFIG_VIDEO_ATMEL_ISC_BASE) += atmel-isc-base.o
+ obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o
+ obj-$(CONFIG_VIDEO_ATMEL_XISC) += atmel-xisc.o
+diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c
+index 46c6e3e20f33..54168b72fd2f 100644
+--- a/drivers/media/platform/atmel/atmel-isc-base.c
++++ b/drivers/media/platform/atmel/atmel-isc-base.c
+@@ -378,6 +378,7 @@ int isc_clk_init(struct isc_device *isc)
+ 
+ 	return 0;
+ }
++EXPORT_SYMBOL_GPL(isc_clk_init);
+ 
+ void isc_clk_cleanup(struct isc_device *isc)
+ {
+@@ -392,6 +393,7 @@ void isc_clk_cleanup(struct isc_device *isc)
+ 			clk_unregister(isc_clk->clk);
+ 	}
+ }
++EXPORT_SYMBOL_GPL(isc_clk_cleanup);
+ 
+ static int isc_queue_setup(struct vb2_queue *vq,
+ 			    unsigned int *nbuffers, unsigned int *nplanes,
+@@ -1575,6 +1577,7 @@ irqreturn_t isc_interrupt(int irq, void *dev_id)
+ 
+ 	return ret;
+ }
++EXPORT_SYMBOL_GPL(isc_interrupt);
+ 
+ static void isc_hist_count(struct isc_device *isc, u32 *min, u32 *max)
+ {
+@@ -2209,6 +2212,7 @@ const struct v4l2_async_notifier_operations isc_async_ops = {
+ 	.unbind = isc_async_unbind,
+ 	.complete = isc_async_complete,
+ };
++EXPORT_SYMBOL_GPL(isc_async_ops);
+ 
+ void isc_subdev_cleanup(struct isc_device *isc)
+ {
+@@ -2221,6 +2225,7 @@ void isc_subdev_cleanup(struct isc_device *isc)
+ 
+ 	INIT_LIST_HEAD(&isc->subdev_entities);
+ }
++EXPORT_SYMBOL_GPL(isc_subdev_cleanup);
+ 
+ int isc_pipeline_init(struct isc_device *isc)
+ {
+@@ -2261,6 +2266,7 @@ int isc_pipeline_init(struct isc_device *isc)
+ 
+ 	return 0;
+ }
++EXPORT_SYMBOL_GPL(isc_pipeline_init);
+ 
+ /* regmap configuration */
+ #define ATMEL_ISC_REG_MAX    0xd5c
+@@ -2270,4 +2276,9 @@ const struct regmap_config isc_regmap_config = {
+ 	.val_bits       = 32,
+ 	.max_register	= ATMEL_ISC_REG_MAX,
+ };
++EXPORT_SYMBOL_GPL(isc_regmap_config);
+ 
++MODULE_AUTHOR("Songjun Wu");
++MODULE_AUTHOR("Eugen Hristev");
++MODULE_DESCRIPTION("Atmel ISC common code base");
++MODULE_LICENSE("GPL v2");
+-- 
+2.32.0
+