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From 04ad289ba1e861ab1dd915d7327095173707c236 Mon Sep 17 00:00:00 2001
From: Sergii Boryshchenko <sergii.boryshchenko@globallogic.com>
Date: Thu, 30 Nov 2017 14:53:52 +0200
Subject: [PATCH] kingfisher: reboot: fix power-off on reset
Method cpld_reset_cpu of bl31 is called from the Linux kernel and uses
GPIO6, GPIO2 pins as SPI bus lines to control the CPLD device. But in the
kernel GPIO6_8 pin are initialized to work in interrupt mode instead of
the input/output mode. This leads to the fact that the SPI bus becomes
non-functional. In this patch we switch the GPIO6_8 pin back to the
input-output mode.
Signed-off-by: Sergii Boryshchenko <sergii.boryshchenko@globallogic.com>
---
diff --git a/plat/renesas/rcar/drivers/cpld/ulcb_cpld.c b/plat/renesas/rcar/drivers/cpld/ulcb_cpld.c
index b0117ef..b171d79 100644
--- a/plat/renesas/rcar/drivers/cpld/ulcb_cpld.c
+++ b/plat/renesas/rcar/drivers/cpld/ulcb_cpld.c
@@ -49,6 +49,9 @@
#define GPIO_INOUTSEL2 0xE6052004
#define GPIO_INOUTSEL6 0xE6055404
+/* General IO/Interrupt Switching Register */
+#define GPIO_IOINTSEL6 0xE6055400
+
/* GPIO/perihperal function select */
#define PFC_GPSR2 0xE6060108
#define PFC_GPSR6 0xE6060118
@@ -115,6 +118,7 @@
gpio_pfc(PFC_GPSR2, SSTBZ);
gpio_pfc(PFC_GPSR6, MOSI);
+ gpio_set_value(GPIO_IOINTSEL6, SCLK, 0);
gpio_set_value(GPIO_OUTDT6, SCLK, 0);
gpio_set_value(GPIO_OUTDT2, SSTBZ, 1);
gpio_set_value(GPIO_OUTDT6, MOSI, 0);
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