From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759795Ab2CaAfI (ORCPT ); Fri, 30 Mar 2012 20:35:08 -0400 Received: from mail-pz0-f52.google.com ([209.85.210.52]:43076 "EHLO mail-pz0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759249Ab2CaAeZ (ORCPT ); Fri, 30 Mar 2012 20:34:25 -0400 From: Grant Likely Subject: Re: [PATCH v4 1/2] mfd: add irq domain support for max8997 interrupts To: Thomas Abraham , linux-kernel@vger.kernel.org Cc: k.lewandowsk@samsung.com, devicetree-discuss@lists.ozlabs.org, rob.herring@calxeda.com, kgene.kim@samsung.com, broonie@opensource.wolfsonmicro.com, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patches@linaro.org In-Reply-To: <1332582590-16382-2-git-send-email-thomas.abraham@linaro.org> References: <1332582590-16382-1-git-send-email-thomas.abraham@linaro.org> <1332582590-16382-2-git-send-email-thomas.abraham@linaro.org> Date: Fri, 30 Mar 2012 16:06:19 -0600 Message-Id: <20120330220619.334AC3E054E@localhost> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 24 Mar 2012 15:19:49 +0530, Thomas Abraham wrote: > Add irq domain support for max8997 interrupts. The reverse mapping method > used is linear mapping since the sub-drivers of max8997 such as regulator > and charger drivers can use the max8997 irq_domain to get the linux irq > number for max8997 interrupts. All uses of irq_base in platform data and > max8997 driver private data are removed. > > Cc: MyungJoo Ham > Signed-off-by: Thomas Abraham > Acked-by: Grant Likely > --- > arch/arm/mach-exynos/mach-nuri.c | 4 -- > arch/arm/mach-exynos/mach-origen.c | 1 - > drivers/mfd/max8997-irq.c | 61 ++++++++++++++++++++-------------- > drivers/mfd/max8997.c | 1 - > include/linux/mfd/max8997-private.h | 4 ++- > include/linux/mfd/max8997.h | 1 - > 6 files changed, 39 insertions(+), 33 deletions(-) > > diff --git a/arch/arm/mach-exynos/mach-nuri.c b/arch/arm/mach-exynos/mach-nuri.c > index 7ac81ce..b21d85d 100644 > --- a/arch/arm/mach-exynos/mach-nuri.c > +++ b/arch/arm/mach-exynos/mach-nuri.c > @@ -1077,12 +1077,8 @@ static struct platform_device nuri_max8903_device = { > static void __init nuri_power_init(void) > { > int gpio; > - int irq_base = IRQ_GPIO_END + 1; > int ta_en = 0; > > - nuri_max8997_pdata.irq_base = irq_base; > - irq_base += MAX8997_IRQ_NR; > - > gpio = EXYNOS4_GPX0(7); > gpio_request(gpio, "AP_PMIC_IRQ"); > s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(0xf)); > diff --git a/arch/arm/mach-exynos/mach-origen.c b/arch/arm/mach-exynos/mach-origen.c > index 827cb99..d3b2e9d 100644 > --- a/arch/arm/mach-exynos/mach-origen.c > +++ b/arch/arm/mach-exynos/mach-origen.c > @@ -424,7 +424,6 @@ static struct max8997_platform_data __initdata origen_max8997_pdata = { > .buck1_gpiodvs = false, > .buck2_gpiodvs = false, > .buck5_gpiodvs = false, > - .irq_base = IRQ_GPIO_END + 1, > > .ignore_gpiodvs_side_effect = true, > .buck125_default_idx = 0x0, > diff --git a/drivers/mfd/max8997-irq.c b/drivers/mfd/max8997-irq.c > index 09274cf..00390a1 100644 > --- a/drivers/mfd/max8997-irq.c > +++ b/drivers/mfd/max8997-irq.c > @@ -142,7 +142,8 @@ static void max8997_irq_sync_unlock(struct irq_data *data) > static const inline struct max8997_irq_data * > irq_to_max8997_irq(struct max8997_dev *max8997, int irq) > { > - return &max8997_irqs[irq - max8997->irq_base]; > + struct irq_data *data = irq_get_irq_data(irq); > + return &max8997_irqs[data->hwirq]; > } Haha, this is kind of bogus now. There are only two users of this function, and *both* of them already have the irq_data pointer. Instead of this, delete this function entirely and make each caller derefernce max8997_irqs directly: const struct max8997_irq_data *irq_data = &max8997_irqs[data->hwirq]; Otherwise, looks good. After fixing you can add my: Acked-by: Grant Likely > > static void max8997_irq_mask(struct irq_data *data) > @@ -182,7 +183,7 @@ static irqreturn_t max8997_irq_thread(int irq, void *data) > u8 irq_reg[MAX8997_IRQ_GROUP_NR] = {}; > u8 irq_src; > int ret; > - int i; > + int i, cur_irq; > > ret = max8997_read_reg(max8997->i2c, MAX8997_REG_INTSRC, &irq_src); > if (ret < 0) { > @@ -269,8 +270,11 @@ static irqreturn_t max8997_irq_thread(int irq, void *data) > > /* Report */ > for (i = 0; i < MAX8997_IRQ_NR; i++) { > - if (irq_reg[max8997_irqs[i].group] & max8997_irqs[i].mask) > - handle_nested_irq(max8997->irq_base + i); > + if (irq_reg[max8997_irqs[i].group] & max8997_irqs[i].mask) { > + cur_irq = irq_find_mapping(max8997->irq_domain, i); > + if (cur_irq) > + handle_nested_irq(cur_irq); > + } > } > > return IRQ_HANDLED; > @@ -278,26 +282,40 @@ static irqreturn_t max8997_irq_thread(int irq, void *data) > > int max8997_irq_resume(struct max8997_dev *max8997) > { > - if (max8997->irq && max8997->irq_base) > - max8997_irq_thread(max8997->irq_base, max8997); > + if (max8997->irq && max8997->irq_domain) > + max8997_irq_thread(0, max8997); > + return 0; > +} > + > +static int max8997_irq_domain_map(struct irq_domain *d, unsigned int irq, > + irq_hw_number_t hw) > +{ > + struct max8997_dev *max8997 = d->host_data; > + > + irq_set_chip_data(irq, max8997); > + irq_set_chip_and_handler(irq, &max8997_irq_chip, handle_edge_irq); > + irq_set_nested_thread(irq, 1); > +#ifdef CONFIG_ARM > + set_irq_flags(irq, IRQF_VALID); > +#else > + irq_set_noprobe(irq); > +#endif > return 0; > } > > +static struct irq_domain_ops max8997_irq_domain_ops = { > + .map = max8997_irq_domain_map, > +}; > + > int max8997_irq_init(struct max8997_dev *max8997) > { > + struct irq_domain *domain; > int i; > - int cur_irq; > int ret; > u8 val; > > if (!max8997->irq) { > dev_warn(max8997->dev, "No interrupt specified.\n"); > - max8997->irq_base = 0; > - return 0; > - } > - > - if (!max8997->irq_base) { > - dev_err(max8997->dev, "No interrupt base specified.\n"); > return 0; > } > > @@ -327,18 +345,11 @@ int max8997_irq_init(struct max8997_dev *max8997) > true : false; > } > > - /* Register with genirq */ > - for (i = 0; i < MAX8997_IRQ_NR; i++) { > - cur_irq = i + max8997->irq_base; > - irq_set_chip_data(cur_irq, max8997); > - irq_set_chip_and_handler(cur_irq, &max8997_irq_chip, > - handle_edge_irq); > - irq_set_nested_thread(cur_irq, 1); > -#ifdef CONFIG_ARM > - set_irq_flags(cur_irq, IRQF_VALID); > -#else > - irq_set_noprobe(cur_irq); > -#endif > + domain = irq_domain_add_linear(NULL, MAX8997_IRQ_NR, > + &max8997_irq_domain_ops, &max8997); > + if (!domain) { > + dev_err(max8997->dev, "could not create irq domain\n"); > + return -ENODEV; > } > > ret = request_threaded_irq(max8997->irq, NULL, max8997_irq_thread, > diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c > index cb83a7a..20ecad3 100644 > --- a/drivers/mfd/max8997.c > +++ b/drivers/mfd/max8997.c > @@ -143,7 +143,6 @@ static int max8997_i2c_probe(struct i2c_client *i2c, > if (!pdata) > goto err; > > - max8997->irq_base = pdata->irq_base; > max8997->ono = pdata->ono; > > mutex_init(&max8997->iolock); > diff --git a/include/linux/mfd/max8997-private.h b/include/linux/mfd/max8997-private.h > index 3f4deb6..830152c 100644 > --- a/include/linux/mfd/max8997-private.h > +++ b/include/linux/mfd/max8997-private.h > @@ -23,6 +23,8 @@ > #define __LINUX_MFD_MAX8997_PRIV_H > > #include > +#include > +#include > > #define MAX8997_REG_INVALID (0xff) > > @@ -325,7 +327,7 @@ struct max8997_dev { > > int irq; > int ono; > - int irq_base; > + struct irq_domain *irq_domain; > struct mutex irqlock; > int irq_masks_cur[MAX8997_IRQ_GROUP_NR]; > int irq_masks_cache[MAX8997_IRQ_GROUP_NR]; > diff --git a/include/linux/mfd/max8997.h b/include/linux/mfd/max8997.h > index fff5905..818486c 100644 > --- a/include/linux/mfd/max8997.h > +++ b/include/linux/mfd/max8997.h > @@ -155,7 +155,6 @@ struct max8997_led_platform_data { > > struct max8997_platform_data { > /* IRQ */ > - int irq_base; > int ono; > int wakeup; > > -- > 1.6.6.rc2 > -- Grant Likely, B.Sc, P.Eng. Secret Lab Technologies,Ltd. From mboxrd@z Thu Jan 1 00:00:00 1970 From: grant.likely@secretlab.ca (Grant Likely) Date: Fri, 30 Mar 2012 16:06:19 -0600 Subject: [PATCH v4 1/2] mfd: add irq domain support for max8997 interrupts In-Reply-To: <1332582590-16382-2-git-send-email-thomas.abraham@linaro.org> References: <1332582590-16382-1-git-send-email-thomas.abraham@linaro.org> <1332582590-16382-2-git-send-email-thomas.abraham@linaro.org> Message-ID: <20120330220619.334AC3E054E@localhost> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sat, 24 Mar 2012 15:19:49 +0530, Thomas Abraham wrote: > Add irq domain support for max8997 interrupts. The reverse mapping method > used is linear mapping since the sub-drivers of max8997 such as regulator > and charger drivers can use the max8997 irq_domain to get the linux irq > number for max8997 interrupts. All uses of irq_base in platform data and > max8997 driver private data are removed. > > Cc: MyungJoo Ham > Signed-off-by: Thomas Abraham > Acked-by: Grant Likely > --- > arch/arm/mach-exynos/mach-nuri.c | 4 -- > arch/arm/mach-exynos/mach-origen.c | 1 - > drivers/mfd/max8997-irq.c | 61 ++++++++++++++++++++-------------- > drivers/mfd/max8997.c | 1 - > include/linux/mfd/max8997-private.h | 4 ++- > include/linux/mfd/max8997.h | 1 - > 6 files changed, 39 insertions(+), 33 deletions(-) > > diff --git a/arch/arm/mach-exynos/mach-nuri.c b/arch/arm/mach-exynos/mach-nuri.c > index 7ac81ce..b21d85d 100644 > --- a/arch/arm/mach-exynos/mach-nuri.c > +++ b/arch/arm/mach-exynos/mach-nuri.c > @@ -1077,12 +1077,8 @@ static struct platform_device nuri_max8903_device = { > static void __init nuri_power_init(void) > { > int gpio; > - int irq_base = IRQ_GPIO_END + 1; > int ta_en = 0; > > - nuri_max8997_pdata.irq_base = irq_base; > - irq_base += MAX8997_IRQ_NR; > - > gpio = EXYNOS4_GPX0(7); > gpio_request(gpio, "AP_PMIC_IRQ"); > s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(0xf)); > diff --git a/arch/arm/mach-exynos/mach-origen.c b/arch/arm/mach-exynos/mach-origen.c > index 827cb99..d3b2e9d 100644 > --- a/arch/arm/mach-exynos/mach-origen.c > +++ b/arch/arm/mach-exynos/mach-origen.c > @@ -424,7 +424,6 @@ static struct max8997_platform_data __initdata origen_max8997_pdata = { > .buck1_gpiodvs = false, > .buck2_gpiodvs = false, > .buck5_gpiodvs = false, > - .irq_base = IRQ_GPIO_END + 1, > > .ignore_gpiodvs_side_effect = true, > .buck125_default_idx = 0x0, > diff --git a/drivers/mfd/max8997-irq.c b/drivers/mfd/max8997-irq.c > index 09274cf..00390a1 100644 > --- a/drivers/mfd/max8997-irq.c > +++ b/drivers/mfd/max8997-irq.c > @@ -142,7 +142,8 @@ static void max8997_irq_sync_unlock(struct irq_data *data) > static const inline struct max8997_irq_data * > irq_to_max8997_irq(struct max8997_dev *max8997, int irq) > { > - return &max8997_irqs[irq - max8997->irq_base]; > + struct irq_data *data = irq_get_irq_data(irq); > + return &max8997_irqs[data->hwirq]; > } Haha, this is kind of bogus now. There are only two users of this function, and *both* of them already have the irq_data pointer. Instead of this, delete this function entirely and make each caller derefernce max8997_irqs directly: const struct max8997_irq_data *irq_data = &max8997_irqs[data->hwirq]; Otherwise, looks good. After fixing you can add my: Acked-by: Grant Likely > > static void max8997_irq_mask(struct irq_data *data) > @@ -182,7 +183,7 @@ static irqreturn_t max8997_irq_thread(int irq, void *data) > u8 irq_reg[MAX8997_IRQ_GROUP_NR] = {}; > u8 irq_src; > int ret; > - int i; > + int i, cur_irq; > > ret = max8997_read_reg(max8997->i2c, MAX8997_REG_INTSRC, &irq_src); > if (ret < 0) { > @@ -269,8 +270,11 @@ static irqreturn_t max8997_irq_thread(int irq, void *data) > > /* Report */ > for (i = 0; i < MAX8997_IRQ_NR; i++) { > - if (irq_reg[max8997_irqs[i].group] & max8997_irqs[i].mask) > - handle_nested_irq(max8997->irq_base + i); > + if (irq_reg[max8997_irqs[i].group] & max8997_irqs[i].mask) { > + cur_irq = irq_find_mapping(max8997->irq_domain, i); > + if (cur_irq) > + handle_nested_irq(cur_irq); > + } > } > > return IRQ_HANDLED; > @@ -278,26 +282,40 @@ static irqreturn_t max8997_irq_thread(int irq, void *data) > > int max8997_irq_resume(struct max8997_dev *max8997) > { > - if (max8997->irq && max8997->irq_base) > - max8997_irq_thread(max8997->irq_base, max8997); > + if (max8997->irq && max8997->irq_domain) > + max8997_irq_thread(0, max8997); > + return 0; > +} > + > +static int max8997_irq_domain_map(struct irq_domain *d, unsigned int irq, > + irq_hw_number_t hw) > +{ > + struct max8997_dev *max8997 = d->host_data; > + > + irq_set_chip_data(irq, max8997); > + irq_set_chip_and_handler(irq, &max8997_irq_chip, handle_edge_irq); > + irq_set_nested_thread(irq, 1); > +#ifdef CONFIG_ARM > + set_irq_flags(irq, IRQF_VALID); > +#else > + irq_set_noprobe(irq); > +#endif > return 0; > } > > +static struct irq_domain_ops max8997_irq_domain_ops = { > + .map = max8997_irq_domain_map, > +}; > + > int max8997_irq_init(struct max8997_dev *max8997) > { > + struct irq_domain *domain; > int i; > - int cur_irq; > int ret; > u8 val; > > if (!max8997->irq) { > dev_warn(max8997->dev, "No interrupt specified.\n"); > - max8997->irq_base = 0; > - return 0; > - } > - > - if (!max8997->irq_base) { > - dev_err(max8997->dev, "No interrupt base specified.\n"); > return 0; > } > > @@ -327,18 +345,11 @@ int max8997_irq_init(struct max8997_dev *max8997) > true : false; > } > > - /* Register with genirq */ > - for (i = 0; i < MAX8997_IRQ_NR; i++) { > - cur_irq = i + max8997->irq_base; > - irq_set_chip_data(cur_irq, max8997); > - irq_set_chip_and_handler(cur_irq, &max8997_irq_chip, > - handle_edge_irq); > - irq_set_nested_thread(cur_irq, 1); > -#ifdef CONFIG_ARM > - set_irq_flags(cur_irq, IRQF_VALID); > -#else > - irq_set_noprobe(cur_irq); > -#endif > + domain = irq_domain_add_linear(NULL, MAX8997_IRQ_NR, > + &max8997_irq_domain_ops, &max8997); > + if (!domain) { > + dev_err(max8997->dev, "could not create irq domain\n"); > + return -ENODEV; > } > > ret = request_threaded_irq(max8997->irq, NULL, max8997_irq_thread, > diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c > index cb83a7a..20ecad3 100644 > --- a/drivers/mfd/max8997.c > +++ b/drivers/mfd/max8997.c > @@ -143,7 +143,6 @@ static int max8997_i2c_probe(struct i2c_client *i2c, > if (!pdata) > goto err; > > - max8997->irq_base = pdata->irq_base; > max8997->ono = pdata->ono; > > mutex_init(&max8997->iolock); > diff --git a/include/linux/mfd/max8997-private.h b/include/linux/mfd/max8997-private.h > index 3f4deb6..830152c 100644 > --- a/include/linux/mfd/max8997-private.h > +++ b/include/linux/mfd/max8997-private.h > @@ -23,6 +23,8 @@ > #define __LINUX_MFD_MAX8997_PRIV_H > > #include > +#include > +#include > > #define MAX8997_REG_INVALID (0xff) > > @@ -325,7 +327,7 @@ struct max8997_dev { > > int irq; > int ono; > - int irq_base; > + struct irq_domain *irq_domain; > struct mutex irqlock; > int irq_masks_cur[MAX8997_IRQ_GROUP_NR]; > int irq_masks_cache[MAX8997_IRQ_GROUP_NR]; > diff --git a/include/linux/mfd/max8997.h b/include/linux/mfd/max8997.h > index fff5905..818486c 100644 > --- a/include/linux/mfd/max8997.h > +++ b/include/linux/mfd/max8997.h > @@ -155,7 +155,6 @@ struct max8997_led_platform_data { > > struct max8997_platform_data { > /* IRQ */ > - int irq_base; > int ono; > int wakeup; > > -- > 1.6.6.rc2 > -- Grant Likely, B.Sc, P.Eng. Secret Lab Technologies,Ltd.