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SubjectRe: [PATCH v2 2/9] mfd: mt6397: extract irq related code from core driver
Hi,

I would expect the patch just a migration patch that just moves the
code and should not add something changed or something new in the
patch.
but a new mt6397_irq_pm_notifier is being added into mt6397-irq.c so I
guessed the patch is needed to be refined and split into several
patches on advance if required.

Sean

On Sun, Mar 10, 2019 at 8:49 PM Hsin-Hsiung Wang
<hsin-hsiung.wang@mediatek.com> wrote:
>
> In order to support different types of irq design, we decide to add
> separate irq drivers for different design and keep mt6397 mfd core
> simple and reusable to all generations of PMICs so far.
>
> Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
> ---
> drivers/mfd/Makefile | 2 +-
> drivers/mfd/mt6397-core.c | 228 ++++++----------------------------------
> drivers/mfd/mt6397-irq.c | 214 +++++++++++++++++++++++++++++++++++++
> include/linux/mfd/mt6397/core.h | 12 +++
> 4 files changed, 259 insertions(+), 197 deletions(-)
> create mode 100644 drivers/mfd/mt6397-irq.c
>
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 12980a4..088e249 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -230,7 +230,7 @@ obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o
> obj-$(CONFIG_INTEL_SOC_PMIC_BXTWC) += intel_soc_pmic_bxtwc.o
> obj-$(CONFIG_INTEL_SOC_PMIC_CHTWC) += intel_soc_pmic_chtwc.o
> obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI) += intel_soc_pmic_chtdc_ti.o
> -obj-$(CONFIG_MFD_MT6397) += mt6397-core.o
> +obj-$(CONFIG_MFD_MT6397) += mt6397-core.o mt6397-irq.o
>
> obj-$(CONFIG_MFD_ALTERA_A10SR) += altera-a10sr.o
> obj-$(CONFIG_MFD_SUN4I_GPADC) += sun4i-gpadc.o
> diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
> index acb9812..53f1edc 100644
> --- a/drivers/mfd/mt6397-core.c
> +++ b/drivers/mfd/mt6397-core.c
> @@ -12,7 +12,6 @@
> * GNU General Public License for more details.
> */
>
> -#include <linux/interrupt.h>
> #include <linux/module.h>
> #include <linux/of_device.h>
> #include <linux/of_irq.h>
> @@ -26,10 +25,6 @@
> #define MT6397_RTC_BASE 0xe000
> #define MT6397_RTC_SIZE 0x3e
>
> -#define MT6323_CHIP_ID 0x23
> -#define MT6391_CHIP_ID 0x91
> -#define MT6397_CHIP_ID 0x97
> -
> static const struct resource mt6397_rtc_resources[] = {
> {
> .start = MT6397_RTC_BASE,
> @@ -94,182 +89,24 @@
> }
> };
>
> -static void mt6397_irq_lock(struct irq_data *data)
> -{
> - struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
> -
> - mutex_lock(&mt6397->irqlock);
> -}
> -
> -static void mt6397_irq_sync_unlock(struct irq_data *data)
> -{
> - struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
> -
> - regmap_write(mt6397->regmap, mt6397->int_con[0],
> - mt6397->irq_masks_cur[0]);
> - regmap_write(mt6397->regmap, mt6397->int_con[1],
> - mt6397->irq_masks_cur[1]);
> -
> - mutex_unlock(&mt6397->irqlock);
> -}
> -
> -static void mt6397_irq_disable(struct irq_data *data)
> -{
> - struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
> - int shift = data->hwirq & 0xf;
> - int reg = data->hwirq >> 4;
> -
> - mt6397->irq_masks_cur[reg] &= ~BIT(shift);
> -}
> -
> -static void mt6397_irq_enable(struct irq_data *data)
> -{
> - struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
> - int shift = data->hwirq & 0xf;
> - int reg = data->hwirq >> 4;
> -
> - mt6397->irq_masks_cur[reg] |= BIT(shift);
> -}
> -
> -#ifdef CONFIG_PM_SLEEP
> -static int mt6397_irq_set_wake(struct irq_data *irq_data, unsigned int on)
> -{
> - struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(irq_data);
> - int shift = irq_data->hwirq & 0xf;
> - int reg = irq_data->hwirq >> 4;
> -
> - if (on)
> - mt6397->wake_mask[reg] |= BIT(shift);
> - else
> - mt6397->wake_mask[reg] &= ~BIT(shift);
> -
> - return 0;
> -}
> -#else
> -#define mt6397_irq_set_wake NULL
> -#endif
> -
> -static struct irq_chip mt6397_irq_chip = {
> - .name = "mt6397-irq",
> - .irq_bus_lock = mt6397_irq_lock,
> - .irq_bus_sync_unlock = mt6397_irq_sync_unlock,
> - .irq_enable = mt6397_irq_enable,
> - .irq_disable = mt6397_irq_disable,
> - .irq_set_wake = mt6397_irq_set_wake,
> +struct chip_data {
> + u32 cid_addr;
> };
>
> -static void mt6397_irq_handle_reg(struct mt6397_chip *mt6397, int reg,
> - int irqbase)
> -{
> - unsigned int status;
> - int i, irq, ret;
> -
> - ret = regmap_read(mt6397->regmap, reg, &status);
> - if (ret) {
> - dev_err(mt6397->dev, "Failed to read irq status: %d\n", ret);
> - return;
> - }
> -
> - for (i = 0; i < 16; i++) {
> - if (status & BIT(i)) {
> - irq = irq_find_mapping(mt6397->irq_domain, irqbase + i);
> - if (irq)
> - handle_nested_irq(irq);
> - }
> - }
> -
> - regmap_write(mt6397->regmap, reg, status);
> -}
> -
> -static irqreturn_t mt6397_irq_thread(int irq, void *data)
> -{
> - struct mt6397_chip *mt6397 = data;
> -
> - mt6397_irq_handle_reg(mt6397, mt6397->int_status[0], 0);
> - mt6397_irq_handle_reg(mt6397, mt6397->int_status[1], 16);
> -
> - return IRQ_HANDLED;
> -}
> -
> -static int mt6397_irq_domain_map(struct irq_domain *d, unsigned int irq,
> - irq_hw_number_t hw)
> -{
> - struct mt6397_chip *mt6397 = d->host_data;
> -
> - irq_set_chip_data(irq, mt6397);
> - irq_set_chip_and_handler(irq, &mt6397_irq_chip, handle_level_irq);
> - irq_set_nested_thread(irq, 1);
> - irq_set_noprobe(irq);
> -
> - return 0;
> -}
> -
> -static const struct irq_domain_ops mt6397_irq_domain_ops = {
> - .map = mt6397_irq_domain_map,
> +static const struct chip_data mt6323_core = {
> + .cid_addr = MT6323_CID,
> };
>
> -static int mt6397_irq_init(struct mt6397_chip *mt6397)
> -{
> - int ret;
> -
> - mutex_init(&mt6397->irqlock);
> -
> - /* Mask all interrupt sources */
> - regmap_write(mt6397->regmap, mt6397->int_con[0], 0x0);
> - regmap_write(mt6397->regmap, mt6397->int_con[1], 0x0);
> -
> - mt6397->irq_domain = irq_domain_add_linear(mt6397->dev->of_node,
> - MT6397_IRQ_NR, &mt6397_irq_domain_ops, mt6397);
> - if (!mt6397->irq_domain) {
> - dev_err(mt6397->dev, "could not create irq domain\n");
> - return -ENOMEM;
> - }
> -
> - ret = devm_request_threaded_irq(mt6397->dev, mt6397->irq, NULL,
> - mt6397_irq_thread, IRQF_ONESHOT, "mt6397-pmic", mt6397);
> - if (ret) {
> - dev_err(mt6397->dev, "failed to register irq=%d; err: %d\n",
> - mt6397->irq, ret);
> - return ret;
> - }
> -
> - return 0;
> -}
> -
> -#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);
> -
> - return 0;
> -}
> -#endif
> -
> -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,
> +};
>
> 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)
> @@ -285,28 +122,30 @@ 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 & 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);
> @@ -314,21 +153,13 @@ 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);
> ret = -ENODEV;
> break;
> }
> @@ -342,9 +173,15 @@ 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);
>
> @@ -359,7 +196,6 @@ 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
> new file mode 100644
> index 0000000..669e93d
> --- /dev/null
> +++ b/drivers/mfd/mt6397-irq.c
> @@ -0,0 +1,214 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Copyright (c) 2019 MediaTek Inc.
> +
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#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>
> +#include <linux/mfd/mt6397/registers.h>
> +
> +static void mt6397_irq_lock(struct irq_data *data)
> +{
> + struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
> +
> + mutex_lock(&mt6397->irqlock);
> +}
> +
> +static void mt6397_irq_sync_unlock(struct irq_data *data)
> +{
> + struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
> +
> + regmap_write(mt6397->regmap, mt6397->int_con[0],
> + mt6397->irq_masks_cur[0]);
> + regmap_write(mt6397->regmap, mt6397->int_con[1],
> + mt6397->irq_masks_cur[1]);
> +
> + mutex_unlock(&mt6397->irqlock);
> +}
> +
> +static void mt6397_irq_disable(struct irq_data *data)
> +{
> + struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
> + int shift = data->hwirq & 0xf;
> + int reg = data->hwirq >> 4;
> +
> + mt6397->irq_masks_cur[reg] &= ~BIT(shift);
> +}
> +
> +static void mt6397_irq_enable(struct irq_data *data)
> +{
> + struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
> + int shift = data->hwirq & 0xf;
> + int reg = data->hwirq >> 4;
> +
> + mt6397->irq_masks_cur[reg] |= BIT(shift);
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int mt6397_irq_set_wake(struct irq_data *irq_data, unsigned int on)
> +{
> + struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(irq_data);
> + int shift = irq_data->hwirq & 0xf;
> + int reg = irq_data->hwirq >> 4;
> +
> + if (on)
> + mt6397->wake_mask[reg] |= BIT(shift);
> + else
> + mt6397->wake_mask[reg] &= ~BIT(shift);
> +
> + return 0;
> +}
> +#else
> +#define mt6397_irq_set_wake NULL
> +#endif
> +
> +static struct irq_chip mt6397_irq_chip = {
> + .name = "mt6397-irq",
> + .irq_bus_lock = mt6397_irq_lock,
> + .irq_bus_sync_unlock = mt6397_irq_sync_unlock,
> + .irq_enable = mt6397_irq_enable,
> + .irq_disable = mt6397_irq_disable,
> + .irq_set_wake = mt6397_irq_set_wake,
> +};
> +
> +static void mt6397_irq_handle_reg(struct mt6397_chip *mt6397, int reg,
> + int irqbase)
> +{
> + unsigned int status;
> + int i, irq, ret;
> +
> + ret = regmap_read(mt6397->regmap, reg, &status);
> + if (ret) {
> + dev_err(mt6397->dev, "Failed to read irq status: %d\n", ret);
> + return;
> + }
> +
> + for (i = 0; i < 16; i++) {
> + if (status & BIT(i)) {
> + irq = irq_find_mapping(mt6397->irq_domain, irqbase + i);
> + if (irq)
> + handle_nested_irq(irq);
> + }
> + }
> +
> + regmap_write(mt6397->regmap, reg, status);
> +}
> +
> +static irqreturn_t mt6397_irq_thread(int irq, void *data)
> +{
> + struct mt6397_chip *mt6397 = data;
> +
> + mt6397_irq_handle_reg(mt6397, mt6397->int_status[0], 0);
> + mt6397_irq_handle_reg(mt6397, mt6397->int_status[1], 16);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int mt6397_irq_domain_map(struct irq_domain *d, unsigned int irq,
> + irq_hw_number_t hw)
> +{
> + struct mt6397_chip *mt6397 = d->host_data;
> +
> + irq_set_chip_data(irq, mt6397);
> + irq_set_chip_and_handler(irq, &mt6397_irq_chip, handle_level_irq);
> + irq_set_nested_thread(irq, 1);
> + irq_set_noprobe(irq);
> +
> + return 0;
> +}
> +
> +static const struct irq_domain_ops mt6397_irq_domain_ops = {
> + .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;
> +
> + mutex_init(&chip->irqlock);
> +
> + switch (chip->chip_id) {
> + case MT6323_CHIP_ID:
> + chip->int_con[0] = MT6323_INT_CON0;
> + chip->int_con[1] = MT6323_INT_CON1;
> + chip->int_status[0] = MT6323_INT_STATUS0;
> + chip->int_status[1] = MT6323_INT_STATUS1;
> + break;
> +
> + case MT6391_CHIP_ID:
> + case MT6397_CHIP_ID:
> + chip->int_con[0] = MT6397_INT_CON0;
> + chip->int_con[1] = MT6397_INT_CON1;
> + chip->int_status[0] = MT6397_INT_STATUS0;
> + chip->int_status[1] = MT6397_INT_STATUS1;
> + break;
> +
> + default:
> + dev_err(chip->dev, "unsupported chip: 0x%x\n", chip->chip_id);
> + return -ENODEV;
> + }
> +
> + /* Mask all interrupt sources */
> + 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,
> + chip);
> + if (!chip->irq_domain) {
> + dev_err(chip->dev, "could not create irq domain\n");
> + return -ENOMEM;
> + }
> +
> + ret = devm_request_threaded_irq(chip->dev, chip->irq, NULL,
> + mt6397_irq_thread, IRQF_ONESHOT,
> + "mt6397-pmic", chip);
> + if (ret) {
> + dev_err(chip->dev, "failed to register irq=%d; err: %d\n",
> + chip->irq, ret);
> + 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 d678f52..23c8c6a 100644
> --- a/include/linux/mfd/mt6397/core.h
> +++ b/include/linux/mfd/mt6397/core.h
> @@ -15,6 +15,14 @@
> #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,
> + MT6397_CHIP_ID = 0x97,
> +};
> +
> enum mt6397_irq_numbers {
> MT6397_IRQ_SPKL_AB = 0,
> MT6397_IRQ_SPKR_AB,
> @@ -54,6 +62,7 @@ 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;
> @@ -62,6 +71,9 @@ struct mt6397_chip {
> u16 irq_masks_cache[2];
> u16 int_con[2];
> u16 int_status[2];
> + u16 chip_id;
> };
>
> +int mt6397_irq_init(struct mt6397_chip *mt6397);
> +
> #endif /* __MFD_MT6397_CORE_H__ */
> --
> 1.9.1
>
>
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek

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