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Message-ID: <53bed53c-13a5-b745-25a0-0c8720f64441@gmail.com>
Date: Fri, 23 Aug 2019 17:12:18 +0200
From: Matthias Brugger <matthias.bgg@...il.com>
To: Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>,
Lee Jones <lee.jones@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Mark Brown <broonie@...nel.org>,
Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc: Mark Rutland <mark.rutland@....com>,
Liam Girdwood <lgirdwood@...il.com>,
Eddie Huang <eddie.huang@...iatek.com>,
Sean Wang <sean.wang@...iatek.com>,
Alessandro Zummo <a.zummo@...ertech.it>,
Kate Stewart <kstewart@...uxfoundation.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Thomas Gleixner <tglx@...utronix.de>,
Richard Fontana <rfontana@...hat.com>,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-rtc@...r.kernel.org, srv_heupstream@...iatek.com
Subject: Re: [PATCH v5 03/10] mfd: mt6397: modify suspend/resume behavior
On 23/08/2019 05:45, Hsin-Hsiung Wang wrote:
> Some pmics don't need backup interrupt settings, so we change to use
> pm notifier for the pmics which are necessary to store settings.
>
> Acked-for-mfd-by: Lee Jones <lee.jones@...aro.org>
> Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>
> ---
> drivers/mfd/mt6397-core.c | 89 +++++++++++++++++------------------------
> drivers/mfd/mt6397-irq.c | 33 +++++++++++++++
> include/linux/mfd/mt6397/core.h | 3 ++
> 3 files changed, 73 insertions(+), 52 deletions(-)
>
> diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
> index 93c8881..8f94187 100644
> --- a/drivers/mfd/mt6397-core.c
> +++ b/drivers/mfd/mt6397-core.c
> @@ -4,7 +4,6 @@
> * Author: Flora Fu, MediaTek
> */
>
> -#include <linux/interrupt.h>
> #include <linux/module.h>
> #include <linux/of_device.h>
> #include <linux/of_irq.h>
> @@ -82,40 +81,27 @@
> }
> };
>
> -#ifdef CONFIG_PM_SLEEP
> -static int mt6397_irq_suspend(struct device *dev)
> -{
> - struct mt6397_chip *chip = dev_get_drvdata(dev);
> -
> - regmap_write(chip->regmap, chip->int_con[0], chip->wake_mask[0]);
> - regmap_write(chip->regmap, chip->int_con[1], chip->wake_mask[1]);
> -
> - enable_irq_wake(chip->irq);
> -
> - return 0;
> -}
> -
> -static int mt6397_irq_resume(struct device *dev)
> -{
> - struct mt6397_chip *chip = dev_get_drvdata(dev);
> -
> - regmap_write(chip->regmap, chip->int_con[0], chip->irq_masks_cur[0]);
> - regmap_write(chip->regmap, chip->int_con[1], chip->irq_masks_cur[1]);
> -
> - disable_irq_wake(chip->irq);
> +struct chip_data {
> + u32 cid_addr;
> + u32 cid_shift;
> +};
>
> - return 0;
> -}
> -#endif
> +static const struct chip_data mt6323_core = {
> + .cid_addr = MT6323_CID,
> + .cid_shift = 0,
> +};
>
> -static SIMPLE_DEV_PM_OPS(mt6397_pm_ops, mt6397_irq_suspend,
> - mt6397_irq_resume);
> +static const struct chip_data mt6397_core = {
> + .cid_addr = MT6397_CID,
> + .cid_shift = 0,
> +};
>
> static int mt6397_probe(struct platform_device *pdev)
> {
> int ret;
> unsigned int id;
> struct mt6397_chip *pmic;
> + const struct chip_data *pmic_core;
>
> pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
> if (!pmic)
> @@ -131,28 +117,30 @@ static int mt6397_probe(struct platform_device *pdev)
> if (!pmic->regmap)
> return -ENODEV;
>
> - platform_set_drvdata(pdev, pmic);
> + pmic_core = of_device_get_match_data(&pdev->dev);
> + if (!pmic_core)
> + return -ENODEV;
>
> - ret = regmap_read(pmic->regmap, MT6397_CID, &id);
> + ret = regmap_read(pmic->regmap, pmic_core->cid_addr, &id);
> if (ret) {
> - dev_err(pmic->dev, "Failed to read chip id: %d\n", ret);
> + dev_err(&pdev->dev, "Failed to read chip id: %d\n", ret);
> return ret;
> }
>
> + pmic->chip_id = (id >> pmic_core->cid_shift) & 0xff;
> +
> + platform_set_drvdata(pdev, pmic);
> +
What do this changes have to do with the commit message/subject?
> pmic->irq = platform_get_irq(pdev, 0);
> if (pmic->irq <= 0)
> return pmic->irq;
>
> - switch (id & 0xff) {
> - case MT6323_CHIP_ID:
> - pmic->int_con[0] = MT6323_INT_CON0;
> - pmic->int_con[1] = MT6323_INT_CON1;
> - pmic->int_status[0] = MT6323_INT_STATUS0;
> - pmic->int_status[1] = MT6323_INT_STATUS1;
> - ret = mt6397_irq_init(pmic);
> - if (ret)
> - return ret;
This looks to me as if it should be part of 02/10.
> + ret = mt6397_irq_init(pmic);
> + if (ret)
> + return ret;
>
> + switch (pmic->chip_id) {
> + case MT6323_CHIP_ID:
> ret = devm_mfd_add_devices(&pdev->dev, -1, mt6323_devs,
> ARRAY_SIZE(mt6323_devs), NULL,
> 0, pmic->irq_domain);
> @@ -160,21 +148,13 @@ static int mt6397_probe(struct platform_device *pdev)
>
> case MT6391_CHIP_ID:
> case MT6397_CHIP_ID:
> - pmic->int_con[0] = MT6397_INT_CON0;
> - pmic->int_con[1] = MT6397_INT_CON1;
> - pmic->int_status[0] = MT6397_INT_STATUS0;
> - pmic->int_status[1] = MT6397_INT_STATUS1;
> - ret = mt6397_irq_init(pmic);
> - if (ret)
> - return ret;
> -
Same here.
Regards,
Matthias
> ret = devm_mfd_add_devices(&pdev->dev, -1, mt6397_devs,
> ARRAY_SIZE(mt6397_devs), NULL,
> 0, pmic->irq_domain);
> break;
>
> default:
> - dev_err(&pdev->dev, "unsupported chip: %d\n", id);
> + dev_err(&pdev->dev, "unsupported chip: %d\n", pmic->chip_id);
> return -ENODEV;
> }
>
> @@ -187,9 +167,15 @@ static int mt6397_probe(struct platform_device *pdev)
> }
>
> static const struct of_device_id mt6397_of_match[] = {
> - { .compatible = "mediatek,mt6397" },
> - { .compatible = "mediatek,mt6323" },
> - { }
> + {
> + .compatible = "mediatek,mt6323",
> + .data = &mt6323_core,
> + }, {
> + .compatible = "mediatek,mt6397",
> + .data = &mt6397_core,
> + }, {
> + /* sentinel */
> + }
> };
> MODULE_DEVICE_TABLE(of, mt6397_of_match);
>
> @@ -204,7 +190,6 @@ static int mt6397_probe(struct platform_device *pdev)
> .driver = {
> .name = "mt6397",
> .of_match_table = of_match_ptr(mt6397_of_match),
> - .pm = &mt6397_pm_ops,
> },
> .id_table = mt6397_id,
> };
> diff --git a/drivers/mfd/mt6397-irq.c b/drivers/mfd/mt6397-irq.c
> index b2d3ce1..669e93d 100644
> --- a/drivers/mfd/mt6397-irq.c
> +++ b/drivers/mfd/mt6397-irq.c
> @@ -9,6 +9,7 @@
> #include <linux/of_irq.h>
> #include <linux/platform_device.h>
> #include <linux/regmap.h>
> +#include <linux/suspend.h>
> #include <linux/mfd/mt6323/core.h>
> #include <linux/mfd/mt6323/registers.h>
> #include <linux/mfd/mt6397/core.h>
> @@ -128,6 +129,36 @@ static int mt6397_irq_domain_map(struct irq_domain *d, unsigned int irq,
> .map = mt6397_irq_domain_map,
> };
>
> +static int mt6397_irq_pm_notifier(struct notifier_block *notifier,
> + unsigned long pm_event, void *unused)
> +{
> + struct mt6397_chip *chip =
> + container_of(notifier, struct mt6397_chip, pm_nb);
> +
> + switch (pm_event) {
> + case PM_SUSPEND_PREPARE:
> + regmap_write(chip->regmap,
> + chip->int_con[0], chip->wake_mask[0]);
> + regmap_write(chip->regmap,
> + chip->int_con[1], chip->wake_mask[1]);
> + enable_irq_wake(chip->irq);
> + break;
> +
> + case PM_POST_SUSPEND:
> + regmap_write(chip->regmap,
> + chip->int_con[0], chip->irq_masks_cur[0]);
> + regmap_write(chip->regmap,
> + chip->int_con[1], chip->irq_masks_cur[1]);
> + disable_irq_wake(chip->irq);
> + break;
> +
> + default:
> + break;
> + }
> +
> + return NOTIFY_DONE;
> +}
> +
> int mt6397_irq_init(struct mt6397_chip *chip)
> {
> int ret;
> @@ -159,6 +190,7 @@ int mt6397_irq_init(struct mt6397_chip *chip)
> regmap_write(chip->regmap, chip->int_con[0], 0x0);
> regmap_write(chip->regmap, chip->int_con[1], 0x0);
>
> + chip->pm_nb.notifier_call = mt6397_irq_pm_notifier;
> chip->irq_domain = irq_domain_add_linear(chip->dev->of_node,
> MT6397_IRQ_NR,
> &mt6397_irq_domain_ops,
> @@ -177,5 +209,6 @@ int mt6397_irq_init(struct mt6397_chip *chip)
> return ret;
> }
>
> + register_pm_notifier(&chip->pm_nb);
> return 0;
> }
> diff --git a/include/linux/mfd/mt6397/core.h b/include/linux/mfd/mt6397/core.h
> index 9320c2a..23e21da 100644
> --- a/include/linux/mfd/mt6397/core.h
> +++ b/include/linux/mfd/mt6397/core.h
> @@ -7,6 +7,8 @@
> #ifndef __MFD_MT6397_CORE_H__
> #define __MFD_MT6397_CORE_H__
>
> +#include <linux/notifier.h>
> +
> enum chip_id {
> MT6323_CHIP_ID = 0x23,
> MT6391_CHIP_ID = 0x91,
> @@ -52,6 +54,7 @@ enum mt6397_irq_numbers {
> struct mt6397_chip {
> struct device *dev;
> struct regmap *regmap;
> + struct notifier_block pm_nb;
> int irq;
> struct irq_domain *irq_domain;
> struct mutex irqlock;
>
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