Commit 2fcbda9a authored by David Collins's avatar David Collins Committed by Dmitry Torokhov
Browse files

Input: pm8941-pwrkey - add support for PMK8350 PON_HLOS PMIC peripheral 



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.

Signed-off-by: default avatarDavid Collins <collinsd@codeaurora.org>
Signed-off-by: default avatarsatya priya <skakit@codeaurora.org>
Reviewed-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1620630064-16354-2-git-send-email-skakit@codeaurora.org


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 595c238a

drivers/input/misc/pm8941-pwrkey.c

+72 −31
Original line number Diff line number Diff line 
// 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
@@ -40,6 +42,10 @@ 
struct pm8941_data {

	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 {
@@ -231,9 +237,10 @@ 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";

	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);
@@ -242,23 +249,28 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev) 
					   PON_DBC_DELAY_MASK,

					   req_delay);

		if (error) {

		dev_err(&pdev->dev, "failed to set debounce: %d\n", error);

			dev_err(&pdev->dev, "failed to set debounce: %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);

					   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;
@@ -271,6 +283,7 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev) 
		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) {
@@ -278,6 +291,7 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev) 
				error);

			return error;

		}

	}



	platform_set_drvdata(pdev, pwrkey);

	device_init_wakeup(&pdev->dev, 1);
@@ -289,6 +303,7 @@ static int pm8941_pwrkey_remove(struct platform_device *pdev) 
{

	struct pm8941_pwrkey *pwrkey = platform_get_drvdata(pdev);



	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);