Re: [PATCH v3 02/10] mfd: mt6397: extract irq related code from core driver

From: Nicolas Boichat
Date: Tue May 07 2019 - 01:12:33 EST

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In reply to: Hsin-Hsiung Wang: "[PATCH v3 02/10] mfd: mt6397: extract irq related code from core driver"
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On Fri, May 3, 2019 at 6:33 PM Hsin-Hsiung Wang
<hsin-hsiung.wang@xxxxxxxxxxxx> 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@xxxxxxxxxxxx>
> ---
> drivers/mfd/Makefile | 3 +-
> drivers/mfd/mt6397-core.c | 146 --------------------------
> drivers/mfd/mt6397-irq.c | 181 ++++++++++++++++++++++++++++++++
> include/linux/mfd/mt6397/core.h | 9 ++
> 4 files changed, 192 insertions(+), 147 deletions(-)
> create mode 100644 drivers/mfd/mt6397-irq.c
>
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index b4569ed7f3f3..ab1e228b5a2f 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -234,7 +234,8 @@ 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-$(CONFIG_MFD_MT6397) += mt6397-core.o
> +mt6397-objs := mt6397-core.o mt6397-irq.o
> +obj-$(CONFIG_MFD_MT6397) += mt6397.o
>
> obj-$(CONFIG_MFD_ALTERA_A10SR) += altera-a10sr.o
> obj-$(CONFIG_MFD_STPMIC1) += stpmic1.o
> diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
> index c9393bc86743..c80f0449fe7e 100644
> --- a/drivers/mfd/mt6397-core.c
> +++ b/drivers/mfd/mt6397-core.c
> @@ -26,10 +26,6 @@
> #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,
> @@ -94,148 +90,6 @@ static const struct mfd_cell mt6397_devs[] = {
> }
> };
>
> -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_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)
> {
> diff --git a/drivers/mfd/mt6397-irq.c b/drivers/mfd/mt6397-irq.c
> new file mode 100644
> index 000000000000..b2d3ce1f3115
> --- /dev/null
> +++ b/drivers/mfd/mt6397-irq.c
> @@ -0,0 +1,181 @@
> +// 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/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,
> +};
> +
> +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;
> + }

This switch/case wasn't there before the move... Doesn't that now
duplicates with code in mt6397_probe, or am I missing something?

> +
> + /* Mask all interrupt sources */
> + regmap_write(chip->regmap, chip->int_con[0], 0x0);
> + regmap_write(chip->regmap, chip->int_con[1], 0x0);
> +
> + 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;
> + }
> +
> + return 0;
> +}
> diff --git a/include/linux/mfd/mt6397/core.h b/include/linux/mfd/mt6397/core.h
> index d678f526e498..93f9f5235575 100644
> --- a/include/linux/mfd/mt6397/core.h
> +++ b/include/linux/mfd/mt6397/core.h
> @@ -15,6 +15,12 @@
> #ifndef __MFD_MT6397_CORE_H__
> #define __MFD_MT6397_CORE_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,
> @@ -62,6 +68,9 @@ 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 *chip);
> +
> #endif /* __MFD_MT6397_CORE_H__ */
> --
> 2.18.0
>
>
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@xxxxxxxxxxxxxxxxxxx
> http://lists.infradead.org/mailman/listinfo/linux-mediatek

Next message: Nicolas Boichat: "Re: [PATCH v3 02/10] mfd: mt6397: extract irq related code from core driver"
Previous message: Hsin-Yi Wang: "Re: [PATCH] arm64: add support for rng-seed"
In reply to: Hsin-Hsiung Wang: "[PATCH v3 02/10] mfd: mt6397: extract irq related code from core driver"
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