linux-kernel - Re: [PATCH v3 2/3] reset: qcom-pon: Add support for gen2 pon

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190616185637.GE31088@tuxbook-pro>
Date:   Sun, 16 Jun 2019 11:56:37 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Sebastian Reichel <sre@...nel.org>,
        John Stultz <john.stultz@...aro.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Andy Gross <agross@...nel.org>,
        David Brown <david.brown@...aro.org>,
        Amit Pundir <amit.pundir@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/3] reset: qcom-pon: Add support for gen2 pon

On Fri 14 Jun 16:14 PDT 2019, John Stultz wrote:

> Add support for gen2 pon register so "reboot bootloader" can
> work on pixel3 and db845.
> 
> Cc: Andy Gross <agross@...nel.org>
> Cc: David Brown <david.brown@...aro.org>
> Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> Cc: Amit Pundir <amit.pundir@...aro.org>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Sebastian Reichel <sre@...nel.org>
> Cc: linux-arm-msm@...r.kernel.org
> Cc: devicetree@...r.kernel.org
> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Signed-off-by: John Stultz <john.stultz@...aro.org>
> 

Sebastian, please take the first two patches through your tree and we'll
pick the dts patch through arm-soc.

Regards,
Bjorn

> v2:
> * Split out dts changes into separate path
> * Minor cleanups and remove unused variables
> ---
>  drivers/power/reset/qcom-pon.c | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/power/reset/qcom-pon.c b/drivers/power/reset/qcom-pon.c
> index 3fa1642d4c543..22a743a0bf28c 100644
> --- a/drivers/power/reset/qcom-pon.c
> +++ b/drivers/power/reset/qcom-pon.c
> @@ -14,11 +14,15 @@
>  
>  #define PON_SOFT_RB_SPARE		0x8f
>  
> +#define GEN1_REASON_SHIFT		2
> +#define GEN2_REASON_SHIFT		1
> +
>  struct pm8916_pon {
>  	struct device *dev;
>  	struct regmap *regmap;
>  	u32 baseaddr;
>  	struct reboot_mode_driver reboot_mode;
> +	long reason_shift;
>  };
>  
>  static int pm8916_reboot_mode_write(struct reboot_mode_driver *reboot,
> @@ -30,7 +34,7 @@ static int pm8916_reboot_mode_write(struct reboot_mode_driver *reboot,
>  
>  	ret = regmap_update_bits(pon->regmap,
>  				 pon->baseaddr + PON_SOFT_RB_SPARE,
> -				 0xfc, magic << 2);
> +				 0xfc, magic << pon->reason_shift);
>  	if (ret < 0)
>  		dev_err(pon->dev, "update reboot mode bits failed\n");
>  
> @@ -60,6 +64,7 @@ static int pm8916_pon_probe(struct platform_device *pdev)
>  		return error;
>  
>  	pon->reboot_mode.dev = &pdev->dev;
> +	pon->reason_shift = (long)of_device_get_match_data(&pdev->dev);
>  	pon->reboot_mode.write = pm8916_reboot_mode_write;
>  	error = devm_reboot_mode_register(&pdev->dev, &pon->reboot_mode);
>  	if (error) {
> @@ -73,8 +78,9 @@ static int pm8916_pon_probe(struct platform_device *pdev)
>  }
>  
>  static const struct of_device_id pm8916_pon_id_table[] = {
> -	{ .compatible = "qcom,pm8916-pon" },
> -	{ .compatible = "qcom,pms405-pon" },
> +	{ .compatible = "qcom,pm8916-pon", .data = (void *)GEN1_REASON_SHIFT },
> +	{ .compatible = "qcom,pms405-pon", .data = (void *)GEN1_REASON_SHIFT },
> +	{ .compatible = "qcom,pm8998-pon", .data = (void *)GEN2_REASON_SHIFT },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, pm8916_pon_id_table);
> -- 
> 2.17.1
>