From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pf0-x243.google.com ([2607:f8b0:400e:c00::243]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1f9gyV-0006ff-U8 for barebox@lists.infradead.org; Sat, 21 Apr 2018 01:06:03 +0000 Received: by mail-pf0-x243.google.com with SMTP id g14so4986139pfh.3 for ; Fri, 20 Apr 2018 18:05:49 -0700 (PDT) From: Andrey Smirnov Date: Fri, 20 Apr 2018 18:05:30 -0700 Message-Id: <20180421010538.16488-3-andrew.smirnov@gmail.com> In-Reply-To: <20180421010538.16488-1-andrew.smirnov@gmail.com> References: <20180421010538.16488-1-andrew.smirnov@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 02/10] ARM: i.MX: Add infrastructure to record SoC reset reason To: barebox@lists.infradead.org Cc: Andrey Smirnov Signed-off-by: Andrey Smirnov --- arch/arm/mach-imx/imx.c | 33 +++++++++++++++++++++++++++ arch/arm/mach-imx/include/mach/reset-reason.h | 25 ++++++++++++++++++++ 2 files changed, 58 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..29dad9a41 100644 --- a/arch/arm/mach-imx/imx.c +++ b/arch/arm/mach-imx/imx.c @@ -14,8 +14,10 @@ #include #include #include +#include #include #include +#include static int __imx_silicon_revision = IMX_CHIP_REV_UNKNOWN; @@ -147,3 +149,34 @@ static int imx_init(void) return ret; } postcore_initcall(imx_init); + +void imx_set_reset_reason(void __iomem *srsr, + const struct imx_reset_reason *reasons) +{ + enum reset_src_type type = RESET_UKWN; + const u32 reg = readl(srsr); + int i, instance = 0; + + /* + * 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); + + for (i = 0; reasons[i].mask; i++) { + if (reg & reasons[i].mask) { + type = reasons[i].type; + instance = reasons[i].instance; + break; + } + } + + /* + * Report this with above default priority in order to make + * sure we'll always override info from watchdog driver. + */ + reset_source_set_priority(type, + RESET_SOURCE_DEFAULT_PRIORITY + 1); + reset_source_set_instance(type, instance); +} 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..39afc4b28 --- /dev/null +++ b/arch/arm/mach-imx/include/mach/reset-reason.h @@ -0,0 +1,25 @@ +#ifndef __MACH_RESET_REASON_H__ +#define __MACH_RESET_REASON_H__ + +#include + +#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) + +struct imx_reset_reason { + uint32_t mask; + enum reset_src_type type; + int instance; +}; + +void imx_set_reset_reason(void __iomem *, const struct imx_reset_reason *); + +#endif /* __MACH_RESET_REASON_H__ */ -- 2.14.3 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox