ARM: uniphier: add external IRQ setup code

I will carry this work-around until it is cared in the kernel.
This looks up the AIDET node and sets up a register to handle
active low interrupt signals.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

diff --git a/arch/arm/mach-uniphier/board_early_init_f.c b/arch/arm/mach-uniphier/board_early_init_f.c
index f853701f44daceb162ce2ed788c690f8640a123d..d35d38dcbf3ef70aa8466642cdc6d32e94e50212 100644 (file)
--- a/arch/arm/mach-uniphier/board_early_init_f.c
+++ b/arch/arm/mach-uniphier/board_early_init_f.c
@@ -4,10 +4,47 @@
  * SPDX-License-Identifier:    GPL-2.0+
  */
 
+#include <common.h>
+#include <libfdt.h>
+#include <linux/io.h>
+
 #include "init.h"
 #include "micro-support-card.h"
 #include "soc-info.h"
 
+DECLARE_GLOBAL_DATA_PTR;
+
+static void uniphier_setup_xirq(void)
+{
+       const void *fdt = gd->fdt_blob;
+       int soc_node, aidet_node;
+       const u32 *val;
+       unsigned long aidet_base;
+       u32 tmp;
+
+       soc_node = fdt_path_offset(fdt, "/soc");
+       if (soc_node < 0)
+               return;
+
+       aidet_node = fdt_subnode_offset_namelen(fdt, soc_node, "aidet", 5);
+       if (aidet_node < 0)
+               return;
+
+       val = fdt_getprop(fdt, aidet_node, "reg", NULL);
+       if (!val)
+               return;
+
+       aidet_base = fdt32_to_cpu(*val);
+
+       tmp = readl(aidet_base + 8);    /* AIDET DETCONFR2 */
+       tmp |= 0x00ff0000;              /* Set XIRQ0-7 low active */
+       writel(tmp, aidet_base + 8);
+
+       tmp = readl(0x55000090);        /* IRQCTL */
+       tmp |= 0x000000ff;
+       writel(tmp, 0x55000090);
+}
+
 int board_early_init_f(void)
 {
        led_puts("U0");
@@ -81,6 +118,8 @@ int board_early_init_f(void)
                break;
        }
 
+       uniphier_setup_xirq();
+
        led_puts("U2");
 
        return 0;

diff --git a/arch/arm/mach-uniphier/pinctrl/pinctrl-ld20.c b/arch/arm/mach-uniphier/pinctrl/pinctrl-ld20.c
index 6066b169cf51d5f40cde70d12e6b566f6ab7d6bf..645b90151c07e12ac1d0e99a68b38568b4c7b8a0 100644 (file)
--- a/arch/arm/mach-uniphier/pinctrl/pinctrl-ld20.c
+++ b/arch/arm/mach-uniphier/pinctrl/pinctrl-ld20.c
@@ -43,4 +43,9 @@ void uniphier_ld20_pin_init(void)
        sg_set_pinsel(53, 0, 8, 4);     /* USB3OD   -> USB3OD */
        sg_set_iectrl_range(46, 53);
 #endif
+
+       sg_set_pinsel(149, 14, 8, 4);   /* XIRQ0    -> XIRQ0 */
+       sg_set_iectrl(149);
+       sg_set_pinsel(153, 14, 8, 4);   /* XIRQ4    -> XIRQ4 */
+       sg_set_iectrl(153);
 }