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Message-ID: <1438079151-29653-2-git-send-email-nicolas.ferre@atmel.com>
Date: Tue, 28 Jul 2015 12:25:49 +0200
From: Nicolas Ferre <nicolas.ferre@...el.com>
To: <linux-arm-kernel@...ts.infradead.org>,
Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
Boris BREZILLON <boris.brezillon@...e-electrons.com>,
Ludovic Desroches <ludovic.desroches@...el.com>
CC: <linux-kernel@...r.kernel.org>,
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
Nicolas Ferre <nicolas.ferre@...el.com>
Subject: [PATCH v2 1/3] ARM: at91/soc: add basic support for new sama5d2 SoC
Add Kconfig entries, header file changes and addition to the documentation.
The early debug infrastructure is also added for easy development.
Signed-off-by: Ludovic Desroches <ludovic.desroches@...el.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
---
Changes in v2:
- change the meaningless config HAVE_AT91_GENERATED to HAVE_AT91_GENERATED_CLK
- modify README file for clarity
Documentation/arm/Atmel/README | 5 +++++
Documentation/devicetree/bindings/arm/atmel-at91.txt | 2 ++
arch/arm/Kconfig.debug | 6 ++++++
arch/arm/include/debug/at91.S | 5 ++++-
arch/arm/mach-at91/Kconfig | 12 ++++++++++++
arch/arm/mach-at91/sama5.c | 3 +++
arch/arm/mach-at91/soc.h | 3 +++
7 files changed, 35 insertions(+), 1 deletion(-)
diff --git a/Documentation/arm/Atmel/README b/Documentation/arm/Atmel/README
index c53a19b4aab2..0931cf7e2e56 100644
--- a/Documentation/arm/Atmel/README
+++ b/Documentation/arm/Atmel/README
@@ -90,6 +90,11 @@ the Atmel website: http://www.atmel.com.
+ Datasheet
http://www.atmel.com/Images/Atmel-11238-32-bit-Cortex-A5-Microcontroller-SAMA5D4_Datasheet.pdf
+ - sama5d2 family
+ - sama5d27
+ + Datasheet
+ Coming soon
+
Linux kernel information
------------------------
diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt
index dd998b9c0433..23c097812d98 100644
--- a/Documentation/devicetree/bindings/arm/atmel-at91.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt
@@ -27,6 +27,8 @@ compatible: must be one of:
o "atmel,at91sam9xe"
* "atmel,sama5" for SoCs using a Cortex-A5, shall be extended with the specific
SoC family:
+ o "atmel,sama5d2" shall be extended with the specific SoC compatible:
+ - "atmel,sama5d27"
o "atmel,sama5d3" shall be extended with the specific SoC compatible:
- "atmel,sama5d31"
- "atmel,sama5d33"
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index fc1533016622..0cfd7f947f6b 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -141,6 +141,12 @@ choice
depends on ARCH_AT91
depends on SOC_SAMA5
+ config AT91_DEBUG_LL_DBGU3
+ bool "Kernel low-level debugging on sama5d2"
+ select DEBUG_AT91_UART
+ depends on ARCH_AT91
+ depends on SOC_SAMA5
+
config DEBUG_BCM2835
bool "Kernel low-level debugging on BCM2835 PL011 UART"
depends on ARCH_BCM2835
diff --git a/arch/arm/include/debug/at91.S b/arch/arm/include/debug/at91.S
index c3c45e628e33..2556a8801c8c 100644
--- a/arch/arm/include/debug/at91.S
+++ b/arch/arm/include/debug/at91.S
@@ -13,9 +13,12 @@
#define AT91_DBGU 0xfffff200 /* AT91_BASE_DBGU0 */
#elif defined(CONFIG_AT91_DEBUG_LL_DBGU1)
#define AT91_DBGU 0xffffee00 /* AT91_BASE_DBGU1 */
-#else
+#elif defined(CONFIG_AT91_DEBUG_LL_DBGU2)
/* On sama5d4, use USART3 as low level serial console */
#define AT91_DBGU 0xfc00c000 /* SAMA5D4_BASE_USART3 */
+#else
+/* On sama5d2, use UART1 as low level serial console */
+#define AT91_DBGU 0xf8020000
#endif
#ifdef CONFIG_MMU
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index e8273e79f6ba..92673006e55c 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -8,6 +8,18 @@ menuconfig ARCH_AT91
select SOC_BUS
if ARCH_AT91
+config SOC_SAMA5D2
+ bool "SAMA5D2 family" if ARCH_MULTI_V7
+ select SOC_SAMA5
+ select CACHE_L2X0
+ select HAVE_FB_ATMEL
+ select HAVE_AT91_UTMI
+ select HAVE_AT91_USB_CLK
+ select HAVE_AT91_H32MX
+ select HAVE_AT91_GENERATED_CLK
+ help
+ Select this if ou are using one of Atmel's SAMA5D2 family SoC.
+
config SOC_SAMA5D3
bool "SAMA5D3 family" if ARCH_MULTI_V7
select SOC_SAMA5
diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c
index 41d829d8e7d5..90c3c3051ae7 100644
--- a/arch/arm/mach-at91/sama5.c
+++ b/arch/arm/mach-at91/sama5.c
@@ -18,6 +18,8 @@
#include "soc.h"
static const struct at91_soc sama5_socs[] = {
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D27_EXID_MATCH,
+ "sama5d27", "sama5d2"),
AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D31_EXID_MATCH,
"sama5d31", "sama5d3"),
AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D33_EXID_MATCH,
@@ -64,6 +66,7 @@ DT_MACHINE_START(sama5_dt, "Atmel SAMA5")
MACHINE_END
static const char *sama5_alt_dt_board_compat[] __initconst = {
+ "atmel,sama5d2",
"atmel,sama5d4",
NULL
};
diff --git a/arch/arm/mach-at91/soc.h b/arch/arm/mach-at91/soc.h
index be23c400596b..8ede0ef86172 100644
--- a/arch/arm/mach-at91/soc.h
+++ b/arch/arm/mach-at91/soc.h
@@ -62,6 +62,9 @@ at91_soc_init(const struct at91_soc *socs);
#define AT91SAM9XE256_CIDR_MATCH 0x329a93a0
#define AT91SAM9XE512_CIDR_MATCH 0x329aa3a0
+#define SAMA5D2_CIDR_MATCH 0x0a5c08c0
+#define SAMA5D27_EXID_MATCH 0x00000021
+
#define SAMA5D3_CIDR_MATCH 0x0a5c07c0
#define SAMA5D31_EXID_MATCH 0x00444300
#define SAMA5D33_EXID_MATCH 0x00414300
--
2.1.3
--
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