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Date:   Mon, 12 Apr 2021 22:00:58 -0500
From:   Bjorn Andersson <bjorn.andersson@linaro.org>
To:     satya priya <skakit@codeaurora.org>
Cc:     Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Andy Gross <agross@kernel.org>,
        Sebastian Reichel <sre@kernel.org>,
        David Collins <collinsd@codeaurora.org>, kgunda@codeaurora.org,
        Vinod Koul <vkoul@kernel.org>,
        Courtney Cavin <courtney.cavin@sonymobile.com>,
        linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        linux-pm@vger.kernel.org
Subject: Re: [PATCH V2 1/4] input: pm8941-pwrkey: add support for PMK8350
 PON_HLOS PMIC peripheral
Message-ID: <20210413030058.GK1538589@yoga>
References: <1617881469-31965-1-git-send-email-skakit@codeaurora.org>
 <1617881469-31965-2-git-send-email-skakit@codeaurora.org>
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On Thu 08 Apr 06:31 CDT 2021, satya priya wrote:

> From: David Collins <collinsd@codeaurora.org>
> 
> On Qualcomm Technologies, Inc. PMIC PMK8350, the PON peripheral
> is split into two peripherals: PON_HLOS and PON_PBS.  The
> application processor only has write access to PON_HLOS which
> limits it to only receiving PON interrupts.
> 
> Add support for the PMK8350 PON_HLOS peripheral so that its
> KPDPWR_N and RESIN_N interrupts can be used to detect key
> presses.
> 

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> Signed-off-by: David Collins <collinsd@codeaurora.org>
> Signed-off-by: satya priya <skakit@codeaurora.org>
> ---
> Changes in V2:
>  - No change.
> 
>  drivers/input/misc/pm8941-pwrkey.c | 103 ++++++++++++++++++++++++++-----------
>  1 file changed, 72 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c
> index cf81044..10e3fc0 100644
> --- a/drivers/input/misc/pm8941-pwrkey.c
> +++ b/drivers/input/misc/pm8941-pwrkey.c
> @@ -1,6 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0-only
>  /*
> - * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
> + * Copyright (c) 2010-2011, 2020-2021, The Linux Foundation. All rights reserved.
>   * Copyright (c) 2014, Sony Mobile Communications Inc.
>   */
>  
> @@ -22,6 +22,8 @@
>  #define PON_RT_STS			0x10
>  #define  PON_KPDPWR_N_SET		BIT(0)
>  #define  PON_RESIN_N_SET		BIT(1)
> +#define  PON_GEN3_RESIN_N_SET		BIT(6)
> +#define  PON_GEN3_KPDPWR_N_SET		BIT(7)
>  
>  #define PON_PS_HOLD_RST_CTL		0x5a
>  #define PON_PS_HOLD_RST_CTL2		0x5b
> @@ -38,8 +40,12 @@
>  #define  PON_DBC_DELAY_MASK		0x7
>  
>  struct pm8941_data {
> -	unsigned int pull_up_bit;
> -	unsigned int status_bit;
> +	unsigned int	pull_up_bit;
> +	unsigned int	status_bit;
> +	bool		supports_ps_hold_poff_config;
> +	bool		supports_debounce_config;
> +	const char	*name;
> +	const char	*phys;
>  };
>  
>  struct pm8941_pwrkey {
> @@ -231,34 +237,40 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
>  
>  	input_set_capability(pwrkey->input, EV_KEY, pwrkey->code);
>  
> -	pwrkey->input->name = "pm8941_pwrkey";
> -	pwrkey->input->phys = "pm8941_pwrkey/input0";
> -
> -	req_delay = (req_delay << 6) / USEC_PER_SEC;
> -	req_delay = ilog2(req_delay);
> -
> -	error = regmap_update_bits(pwrkey->regmap,
> -				   pwrkey->baseaddr + PON_DBC_CTL,
> -				   PON_DBC_DELAY_MASK,
> -				   req_delay);
> -	if (error) {
> -		dev_err(&pdev->dev, "failed to set debounce: %d\n", error);
> -		return error;
> +	pwrkey->input->name = pwrkey->data->name;
> +	pwrkey->input->phys = pwrkey->data->phys;
> +
> +	if (pwrkey->data->supports_debounce_config) {
> +		req_delay = (req_delay << 6) / USEC_PER_SEC;
> +		req_delay = ilog2(req_delay);
> +
> +		error = regmap_update_bits(pwrkey->regmap,
> +					   pwrkey->baseaddr + PON_DBC_CTL,
> +					   PON_DBC_DELAY_MASK,
> +					   req_delay);
> +		if (error) {
> +			dev_err(&pdev->dev, "failed to set debounce: %d\n",
> +				error);
> +			return error;
> +		}
>  	}
>  
> -	error = regmap_update_bits(pwrkey->regmap,
> -				   pwrkey->baseaddr + PON_PULL_CTL,
> -				   pwrkey->data->pull_up_bit,
> -				   pull_up ? pwrkey->data->pull_up_bit : 0);
> -	if (error) {
> -		dev_err(&pdev->dev, "failed to set pull: %d\n", error);
> -		return error;
> +	if (pwrkey->data->pull_up_bit) {
> +		error = regmap_update_bits(pwrkey->regmap,
> +					   pwrkey->baseaddr + PON_PULL_CTL,
> +					   pwrkey->data->pull_up_bit,
> +					   pull_up ? pwrkey->data->pull_up_bit :
> +						     0);
> +		if (error) {
> +			dev_err(&pdev->dev, "failed to set pull: %d\n", error);
> +			return error;
> +		}
>  	}
>  
>  	error = devm_request_threaded_irq(&pdev->dev, pwrkey->irq,
>  					  NULL, pm8941_pwrkey_irq,
>  					  IRQF_ONESHOT,
> -					  "pm8941_pwrkey", pwrkey);
> +					  pwrkey->data->name, pwrkey);
>  	if (error) {
>  		dev_err(&pdev->dev, "failed requesting IRQ: %d\n", error);
>  		return error;
> @@ -271,12 +283,14 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
>  		return error;
>  	}
>  
> -	pwrkey->reboot_notifier.notifier_call = pm8941_reboot_notify,
> -	error = register_reboot_notifier(&pwrkey->reboot_notifier);
> -	if (error) {
> -		dev_err(&pdev->dev, "failed to register reboot notifier: %d\n",
> -			error);
> -		return error;
> +	if (pwrkey->data->supports_ps_hold_poff_config) {
> +		pwrkey->reboot_notifier.notifier_call = pm8941_reboot_notify,
> +		error = register_reboot_notifier(&pwrkey->reboot_notifier);
> +		if (error) {
> +			dev_err(&pdev->dev, "failed to register reboot notifier: %d\n",
> +				error);
> +			return error;
> +		}
>  	}
>  
>  	platform_set_drvdata(pdev, pwrkey);
> @@ -289,7 +303,8 @@ static int pm8941_pwrkey_remove(struct platform_device *pdev)
>  {
>  	struct pm8941_pwrkey *pwrkey = platform_get_drvdata(pdev);
>  
> -	unregister_reboot_notifier(&pwrkey->reboot_notifier);
> +	if (pwrkey->data->supports_ps_hold_poff_config)
> +		unregister_reboot_notifier(&pwrkey->reboot_notifier);
>  
>  	return 0;
>  }
> @@ -297,16 +312,42 @@ static int pm8941_pwrkey_remove(struct platform_device *pdev)
>  static const struct pm8941_data pwrkey_data = {
>  	.pull_up_bit = PON_KPDPWR_PULL_UP,
>  	.status_bit = PON_KPDPWR_N_SET,
> +	.name = "pm8941_pwrkey",
> +	.phys = "pm8941_pwrkey/input0",
> +	.supports_ps_hold_poff_config = true,
> +	.supports_debounce_config = true,
>  };
>  
>  static const struct pm8941_data resin_data = {
>  	.pull_up_bit = PON_RESIN_PULL_UP,
>  	.status_bit = PON_RESIN_N_SET,
> +	.name = "pm8941_resin",
> +	.phys = "pm8941_resin/input0",
> +	.supports_ps_hold_poff_config = true,
> +	.supports_debounce_config = true,
> +};
> +
> +static const struct pm8941_data pon_gen3_pwrkey_data = {
> +	.status_bit = PON_GEN3_KPDPWR_N_SET,
> +	.name = "pmic_pwrkey",
> +	.phys = "pmic_pwrkey/input0",
> +	.supports_ps_hold_poff_config = false,
> +	.supports_debounce_config = false,
> +};
> +
> +static const struct pm8941_data pon_gen3_resin_data = {
> +	.status_bit = PON_GEN3_RESIN_N_SET,
> +	.name = "pmic_resin",
> +	.phys = "pmic_resin/input0",
> +	.supports_ps_hold_poff_config = false,
> +	.supports_debounce_config = false,
>  };
>  
>  static const struct of_device_id pm8941_pwr_key_id_table[] = {
>  	{ .compatible = "qcom,pm8941-pwrkey", .data = &pwrkey_data },
>  	{ .compatible = "qcom,pm8941-resin", .data = &resin_data },
> +	{ .compatible = "qcom,pmk8350-pwrkey", .data = &pon_gen3_pwrkey_data },
> +	{ .compatible = "qcom,pmk8350-resin", .data = &pon_gen3_resin_data },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, pm8941_pwr_key_id_table);
> -- 
> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member 
> of Code Aurora Forum, hosted by The Linux Foundation
>