From: Sascha Hauer <s.hauer@pengutronix.de>
To: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 1/1] ARM i.MX35: Read reset source from CCM
Date: Tue, 29 Mar 2016 09:07:37 +0200 [thread overview]
Message-ID: <20160329070737.GB30994@pengutronix.de> (raw)
In-Reply-To: <1458546476-20624-1-git-send-email-alexander.stein@systec-electronic.com>
On Mon, Mar 21, 2016 at 08:47:56AM +0100, Alexander Stein wrote:
> CCM has reset status bits with more detailed information than the
> watchdog. Set reset source with higher priority.
>
> Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
> ---
> arch/arm/mach-imx/clk-imx35.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
Applied, thanks
Sascha
>
> diff --git a/arch/arm/mach-imx/clk-imx35.c b/arch/arm/mach-imx/clk-imx35.c
> index 2433d73..af6c405 100644
> --- a/arch/arm/mach-imx/clk-imx35.c
> +++ b/arch/arm/mach-imx/clk-imx35.c
> @@ -14,6 +14,7 @@
> #include <linux/clkdev.h>
> #include <linux/err.h>
> #include <mach/imx35-regs.h>
> +#include <reset_source.h>
>
> #include "clk.h"
>
> @@ -95,12 +96,31 @@ static int imx35_ccm_probe(struct device_d *dev)
> struct arm_ahb_div *aad;
> unsigned char *hsp_div;
> void __iomem *base;
> + u32 reg;
>
> iores = dev_request_mem_resource(dev, 0);
> if (IS_ERR(iores))
> return PTR_ERR(iores);
> base = IOMEM(iores->start);
>
> + /* Check reset source */
> + reg = readl(base + CCM_RCSR);
> +
> + switch (reg & 0x0F) {
> + case 0x00:
> + reset_source_set_priority(RESET_POR, 200);
> + break;
> + case 0x02:
> + reset_source_set_priority(RESET_JTAG, 200);
> + break;
> + case 0x04:
> + reset_source_set_priority(RESET_RST, 200);
> + break;
> + case 0x08:
> + reset_source_set_priority(RESET_WDG, 200);
> + break;
> + }
> +
> writel(0xffffffff, base + CCM_CGR0);
> writel(0xffffffff, base + CCM_CGR1);
> writel(0xfbffffff, base + CCM_CGR2);
> --
> 2.7.3
>
>
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>
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prev parent reply other threads:[~2016-03-29 7:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-21 7:47 Alexander Stein
2016-03-29 7:07 ` Sascha Hauer [this message]
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