| 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
| ||
|
Message-ID: <1566531931-9772-4-git-send-email-hsin-hsiung.wang@mediatek.com>
Date: Fri, 23 Aug 2019 11:45:24 +0800
From: Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>
To: Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
Mark Brown <broonie@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
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>,
Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>,
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: [PATCH v5 03/10] mfd: mt6397: modify suspend/resume behavior
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);
+
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;
+ 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;
-
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;
--
1.9.1
Powered by blists - more mailing lists