From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabio Estevam Date: Tue, 30 Aug 2011 10:54:10 -0300 Subject: [U-Boot] [PATCH 2/2] ARM: mx25: Print the source of reset In-Reply-To: <1314712450-571-1-git-send-email-fabio.estevam@freescale.com> References: <1314712450-571-1-git-send-email-fabio.estevam@freescale.com> Message-ID: <1314712450-571-2-git-send-email-fabio.estevam@freescale.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Print the source of reset during boot. Signed-off-by: Fabio Estevam --- arch/arm/cpu/arm926ejs/mx25/generic.c | 25 ++++++++++++++++++++++++- 1 files changed, 24 insertions(+), 1 deletions(-) diff --git a/arch/arm/cpu/arm926ejs/mx25/generic.c b/arch/arm/cpu/arm926ejs/mx25/generic.c index a4e8c14..047e49d 100644 --- a/arch/arm/cpu/arm926ejs/mx25/generic.c +++ b/arch/arm/cpu/arm926ejs/mx25/generic.c @@ -130,6 +130,28 @@ u32 get_cpu_rev(void) return system_rev; } +static char *get_reset_cause(void) +{ + /* read RCSR register from CCM module */ + struct ccm_regs *ccm = + (struct ccm_regs *)IMX_CCM_BASE; + + u32 cause = readl(&ccm->rcsr) & 0x0f; + + switch (cause) { + case 0x0000: + return "POR"; + case 0x0001: + return "RST"; + case 0x0002: + return "WDOG"; + case 0x0006: + return "JTAG"; + default: + return "unknown reset"; + } +} + #if defined(CONFIG_DISPLAY_CPUINFO) int print_cpuinfo (void) { @@ -138,10 +160,11 @@ int print_cpuinfo (void) cpurev = get_cpu_rev(); - printf("CPU: Freescale i.MX25 rev%d.%d at %s MHz\n\n", + printf("CPU: Freescale i.MX25 rev%d.%d at %s MHz\n", (cpurev & 0x000F0) >> 4, (cpurev & 0x0000F) >> 0, strmhz (buf, imx_get_armclk ())); + printf("Reset cause: %s\n\n", get_reset_cause()); return 0; } #endif -- 1.7.1