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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 02/10] ARM: i.MX: Add infrastructure to record SoC reset reason
Date: Sat, 14 Apr 2018 10:50:16 -0700	[thread overview]
Message-ID: <20180414175024.9962-3-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20180414175024.9962-1-andrew.smirnov@gmail.com>

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 arch/arm/mach-imx/imx.c                       | 49 +++++++++++++++++++++++++++
 arch/arm/mach-imx/include/mach/reset-reason.h | 17 ++++++++++
 2 files changed, 66 insertions(+)
 create mode 100644 arch/arm/mach-imx/include/mach/reset-reason.h

diff --git a/arch/arm/mach-imx/imx.c b/arch/arm/mach-imx/imx.c
index 9400105c6..e860e298a 100644
--- a/arch/arm/mach-imx/imx.c
+++ b/arch/arm/mach-imx/imx.c
@@ -14,8 +14,11 @@
 #include <common.h>
 #include <of.h>
 #include <init.h>
+#include <io.h>
 #include <mach/revision.h>
+#include <mach/reset-reason.h>
 #include <mach/generic.h>
+#include <reset_source.h>
 
 static int __imx_silicon_revision = IMX_CHIP_REV_UNKNOWN;
 
@@ -147,3 +150,49 @@ static int imx_init(void)
 	return ret;
 }
 postcore_initcall(imx_init);
+
+void imx_set_reset_reason(void __iomem *srsr)
+{
+	enum reset_src_type type = RESET_UKWN;
+	const u32 reg = readl(srsr);
+
+	/*
+	 * SRSR register captures ALL reset event that occured since
+	 * POR, so we need to clear it to make sure we only caputre
+	 * the latest one.
+	 */
+	writel(reg, srsr);
+
+	switch (reg) {
+	case IMX_SRC_SRSR_IPP_RESET: /* FALLTHROUGH */
+	case IMX_SRC_SRSR_IPP_RESET | IMX_SRC_SRSR_WDOG1_RESET:
+		type = RESET_POR;
+		break;
+	case IMX_SRC_SRSR_WDOG3_RESET: /* FALLTHROUGH */
+	case IMX_SRC_SRSR_WDOG4_RESET: /* FALLTHROUGH */
+	case IMX_SRC_SRSR_WDOG1_RESET:
+		type = RESET_WDG;
+		break;
+	case IMX_SRC_SRSR_JTAG_RESET: /* FALLTHROUGH */
+	case IMX_SRC_SRSR_JTAG_SW_RESET:
+		type = RESET_JTAG;
+		break;
+	case IMX_SRC_SRSR_TEMPSENSE_RESET:
+		type = RESET_THERM;
+		break;
+	case IMX_SRC_SRSR_WARM_BOOT:
+		type = RESET_RST;
+		break;
+	}
+
+	reset_source_set(type);
+
+	switch (reg) {
+	case IMX_SRC_SRSR_WDOG3_RESET:
+		reset_source_set_instance(type, 1);
+		break;
+	case IMX_SRC_SRSR_WDOG4_RESET:
+		reset_source_set_instance(type, 2);
+		break;
+	}
+}
diff --git a/arch/arm/mach-imx/include/mach/reset-reason.h b/arch/arm/mach-imx/include/mach/reset-reason.h
new file mode 100644
index 000000000..96b905303
--- /dev/null
+++ b/arch/arm/mach-imx/include/mach/reset-reason.h
@@ -0,0 +1,17 @@
+#ifndef __MACH_RESET_REASON_H__
+#define __MACH_RESET_REASON_H__
+
+#define IMX_SRC_SRSR_IPP_RESET		BIT(0)
+#define IMX_SRC_SRSR_CSU_RESET		BIT(1)
+#define IMX_SRC_SRSR_IPP_USER_RESET	BIT(3)
+#define IMX_SRC_SRSR_WDOG1_RESET	BIT(4)
+#define IMX_SRC_SRSR_JTAG_RESET		BIT(5)
+#define IMX_SRC_SRSR_JTAG_SW_RESET	BIT(6)
+#define IMX_SRC_SRSR_WDOG3_RESET	BIT(7)
+#define IMX_SRC_SRSR_WDOG4_RESET	BIT(8)
+#define IMX_SRC_SRSR_TEMPSENSE_RESET	BIT(9)
+#define IMX_SRC_SRSR_WARM_BOOT		BIT(16)
+
+void imx_set_reset_reason(void __iomem *srsr);
+
+#endif /* __MACH_RESET_REASON_H__ */
-- 
2.14.3


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  parent reply	other threads:[~2018-04-14 17:50 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-14 17:50 [PATCH 00/10] i.MX reset reason detection support Andrey Smirnov
2018-04-14 17:50 ` [PATCH 01/10] common: reset_source: Add the notion of "reset source instance" Andrey Smirnov
2018-04-14 17:50 ` Andrey Smirnov [this message]
2018-04-18 15:23   ` [PATCH 02/10] ARM: i.MX: Add infrastructure to record SoC reset reason Philipp Zabel
2018-04-19 22:19     ` Andrey Smirnov
2018-04-14 17:50 ` [PATCH 03/10] ARM: i.MX6: Record reset reason as a part of startup Andrey Smirnov
2018-04-16  7:13   ` Sascha Hauer
2018-04-16 13:28     ` Andrey Smirnov
2018-04-17  6:49       ` Sascha Hauer
2018-04-17 15:35         ` Andrey Smirnov
2018-04-18  8:23           ` Sascha Hauer
2018-04-14 17:50 ` [PATCH 04/10] ARM: i.MX7: " Andrey Smirnov
2018-04-16  7:13   ` Sascha Hauer
2018-04-14 17:50 ` [PATCH 05/10] common: reset_source: Introduce reset_source_name() Andrey Smirnov
2018-04-14 17:50 ` [PATCH 06/10] ARM: i.MX: Log detected reset reason Andrey Smirnov
2018-04-14 17:50 ` [PATCH 07/10] ARM: i.MX: Print "revision unknown" if that is the case Andrey Smirnov
2018-04-14 17:50 ` [PATCH 08/10] ARM: VFxxx: Add code to detect reset reason Andrey Smirnov
2018-04-16  7:19   ` Sascha Hauer
2018-04-16 13:12     ` Andrey Smirnov
2018-04-14 17:50 ` [PATCH 09/10] ARM: VFxxx: Add code to detect cpu variant Andrey Smirnov
2018-04-14 17:50 ` [PATCH 10/10] ARM: VFxxx: Detect cpu variant and reset source on start Andrey Smirnov

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