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ARM: uniphier: add external IRQ setup code

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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>
This commit is contained in:
Masahiro Yamada 2016-06-29 19:39:03 +09:00
parent 1013aef330
commit e64a6b1141
2 changed files with 44 additions and 0 deletions
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39
arch/arm/mach-uniphier/board_early_init_f.c
View file

@ -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;

5
arch/arm/mach-uniphier/pinctrl/pinctrl-ld20.c
View file

@ -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);
}