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Date: Mon, 12 Apr 2021 22:00:58 -0500
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: satya priya <skakit@...eaurora.org>
Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>,
Rob Herring <robh+dt@...nel.org>,
Andy Gross <agross@...nel.org>,
Sebastian Reichel <sre@...nel.org>,
David Collins <collinsd@...eaurora.org>, kgunda@...eaurora.org,
Vinod Koul <vkoul@...nel.org>,
Courtney Cavin <courtney.cavin@...ymobile.com>,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-pm@...r.kernel.org
Subject: Re: [PATCH V2 1/4] input: pm8941-pwrkey: add support for PMK8350
PON_HLOS PMIC peripheral
On Thu 08 Apr 06:31 CDT 2021, satya priya wrote:
> From: David Collins <collinsd@...eaurora.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@...aro.org>
Regards,
Bjorn
> Signed-off-by: David Collins <collinsd@...eaurora.org>
> Signed-off-by: satya priya <skakit@...eaurora.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
>
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