[Xen-devel] [PATCH v2 1/2] xen/arm64: Add Support for Allwinner H5 (sun50i)

[Awais Masood <awais.masood@xxxxxxxxxx>]

This patch adds support for Allwinner H5/sun50i SoC.

Makefile updated to enable ARM64 compilation for sunxi.c.

sunxi.c updates include:
  - Addition of H5/sun50i dt compatibility string.
  - Handling of different Watchdog timer base addresses on sun7i
    and sun50i.

Tested on Orange Pi PC2

Signed-off-by: Awais Masood <awais.masood@xxxxxxxxxx>

---
Changes since v1:
  - Improved patch description
---
 xen/arch/arm/platforms/Makefile |  1 +
 xen/arch/arm/platforms/sunxi.c  | 40 +++++++++++++++++++++++++++++++---------
 2 files changed, 32 insertions(+), 9 deletions(-)

diff --git a/xen/arch/arm/platforms/Makefile b/xen/arch/arm/platforms/Makefile
index 49fa683..722897a 100644
--- a/xen/arch/arm/platforms/Makefile
+++ b/xen/arch/arm/platforms/Makefile
@@ -6,5 +6,6 @@ obj-$(CONFIG_ARM_32) += omap5.o
 obj-$(CONFIG_ARM_32) += rcar2.o
 obj-$(CONFIG_ARM_64) += seattle.o
 obj-$(CONFIG_ARM_32) += sunxi.o
+obj-$(CONFIG_ARM_64) += sunxi.o
 obj-$(CONFIG_ARM_64) += xgene-storm.o
 obj-$(CONFIG_ARM_64) += xilinx-zynqmp.o
diff --git a/xen/arch/arm/platforms/sunxi.c b/xen/arch/arm/platforms/sunxi.c
index 0ba7b3d..06d62e7 100644
--- a/xen/arch/arm/platforms/sunxi.c
+++ b/xen/arch/arm/platforms/sunxi.c
@@ -22,18 +22,18 @@
 #include <asm/io.h>
 
 /* Watchdog constants: */
-#define SUNXI_WDT_BASE            0x01c20c90
+#define SUNXI_WDT_A20_BASE        0x01c20c90
+#define SUNXI_WDT_H5_BASE         0x01c20cA0
 #define SUNXI_WDT_MODE            0x04
-#define SUNXI_WDT_MODEADDR        (SUNXI_WDT_BASE + SUNXI_WDT_MODE)
 #define SUNXI_WDT_MODE_EN         (1 << 0)
 #define SUNXI_WDT_MODE_RST_EN     (1 << 1)
 
 
-static void sunxi_reset(void)
+static void sunxi_reset(u32 base)
 {
     void __iomem *wdt;
 
-    wdt = ioremap_nocache(SUNXI_WDT_MODEADDR & PAGE_MASK, PAGE_SIZE);
+    wdt = ioremap_nocache((base + SUNXI_WDT_MODE) & PAGE_MASK, PAGE_SIZE);
     if ( !wdt )
     {
         dprintk(XENLOG_ERR, "Unable to map watchdog register!\n");
@@ -42,19 +42,35 @@ static void sunxi_reset(void)
 
     /* Enable watchdog to trigger a reset after 500 ms: */
     writel(SUNXI_WDT_MODE_EN | SUNXI_WDT_MODE_RST_EN,
-      wdt + (SUNXI_WDT_MODEADDR & ~PAGE_MASK));
+      wdt + ((base + SUNXI_WDT_MODE) & ~PAGE_MASK));
     iounmap(wdt);
 
     for (;;)
         wfi();
 }
 
-static const char * const sunxi_dt_compat[] __initconst =
+static void sunxi_a20_reset(void)
+{
+    sunxi_reset(SUNXI_WDT_A20_BASE);
+}
+
+static void sunxi_h5_reset(void)
+{
+    sunxi_reset(SUNXI_WDT_H5_BASE);
+}
+
+static const char * const sunxi_dt_allwinner_a20_compat[] __initconst =
 {
     "allwinner,sun7i-a20",
     NULL
 };
 
+static const char * const sunxi_dt_allwinner_h5_compat[] __initconst =
+{
+    "allwinner,sun50i-h5",
+    NULL
+};
+
 static const struct dt_device_match sunxi_blacklist_dev[] __initconst =
 {
     /*
@@ -65,10 +81,16 @@ static const struct dt_device_match sunxi_blacklist_dev[] 
__initconst =
     { /* sentinel */ },
 };
 
-PLATFORM_START(sunxi, "Allwinner A20")
-    .compatible = sunxi_dt_compat,
+PLATFORM_START(sunxia20, "Allwinner A20")
+    .compatible = sunxi_dt_allwinner_a20_compat,
+    .blacklist_dev = sunxi_blacklist_dev,
+    .reset = sunxi_a20_reset,
+PLATFORM_END
+
+PLATFORM_START(sunxih5, "Allwinner H5")
+    .compatible = sunxi_dt_allwinner_h5_compat,
     .blacklist_dev = sunxi_blacklist_dev,
-    .reset = sunxi_reset,
+    .reset = sunxi_h5_reset,
 PLATFORM_END
 
 /*
-- 
2.7.4


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