From: Stefan Binding <sbinding@opensource.cirrus.com> To: Mark Brown <broonie@kernel.org>, "Rafael J . Wysocki" <rafael@kernel.org>, Len Brown <lenb@kernel.org>, Hans de Goede <hdegoede@redhat.com>, Mark Gross <markgross@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com> Cc: <alsa-devel@alsa-project.org>, <linux-kernel@vger.kernel.org>, <linux-spi@vger.kernel.org>, <linux-acpi@vger.kernel.org>, <platform-driver-x86@vger.kernel.org>, <patches@opensource.cirrus.com>, Stefan Binding <sbinding@opensource.cirrus.com> Subject: [PATCH v3 04/10] spi: Add API to count spi acpi resources Date: Tue, 18 Jan 2022 14:52:45 +0000 [thread overview] Message-ID: <20220118145251.1548-5-sbinding@opensource.cirrus.com> (raw) In-Reply-To: <20220118145251.1548-1-sbinding@opensource.cirrus.com> Some ACPI nodes may have more than one Spi Resource. To be able to handle these case, its necessary to have a way of counting these resources. Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com> --- drivers/spi/spi.c | 40 ++++++++++++++++++++++++++++++++++++++++ include/linux/spi/spi.h | 6 ++++++ 2 files changed, 46 insertions(+) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 898cc9931490..8c0c2e26609a 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -2325,6 +2325,46 @@ struct acpi_spi_lookup { int irq_index; }; +static int acpi_spi_count(struct acpi_resource *ares, void *data) +{ + struct acpi_resource_spi_serialbus *sb; + int *count = data; + + if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) + return 1; + + sb = &ares->data.spi_serial_bus; + if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_SPI) + return 1; + + *count = *count + 1; + + return 1; +} + +/** + * acpi_spi_count_resources - Count the number of SpiSerialBus resources + * @adev: ACPI device + * + * Returns the number of SpiSerialBus resources in the ACPI-device's + * resource-list; or a negative error code. + */ +int acpi_spi_count_resources(struct acpi_device *adev) +{ + LIST_HEAD(r); + int count = 0; + int ret; + + ret = acpi_dev_get_resources(adev, &r, acpi_spi_count, &count); + if (ret < 0) + return ret; + + acpi_dev_free_resource_list(&r); + + return count; +} +EXPORT_SYMBOL_GPL(acpi_spi_count_resources); + static void acpi_spi_parse_apple_properties(struct acpi_device *dev, struct acpi_spi_lookup *lookup) { diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 1a34fd0f6ca2..25a82729f8da 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -764,6 +764,7 @@ extern void spi_unregister_controller(struct spi_controller *ctlr); extern struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr, struct acpi_device *adev, int index, int irq_index); +int acpi_spi_count_resources(struct acpi_device *adev); #else static inline struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr, struct acpi_device *adev, @@ -771,6 +772,11 @@ static inline struct spi_device *acpi_spi_device_alloc(struct spi_controller *ct { return ERR_PTR(-EOPNOTSUPP); } + +int acpi_spi_count_resources(struct acpi_device *adev) +{ + return -EOPNOTSUPP; +} #endif /* -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Stefan Binding <sbinding@opensource.cirrus.com> To: Mark Brown <broonie@kernel.org>, "Rafael J . Wysocki" <rafael@kernel.org>, Len Brown <lenb@kernel.org>, Hans de Goede <hdegoede@redhat.com>, Mark Gross <markgross@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com> Cc: alsa-devel@alsa-project.org, patches@opensource.cirrus.com, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-acpi@vger.kernel.org, Stefan Binding <sbinding@opensource.cirrus.com>, linux-spi@vger.kernel.org Subject: [PATCH v3 04/10] spi: Add API to count spi acpi resources Date: Tue, 18 Jan 2022 14:52:45 +0000 [thread overview] Message-ID: <20220118145251.1548-5-sbinding@opensource.cirrus.com> (raw) In-Reply-To: <20220118145251.1548-1-sbinding@opensource.cirrus.com> Some ACPI nodes may have more than one Spi Resource. To be able to handle these case, its necessary to have a way of counting these resources. Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com> --- drivers/spi/spi.c | 40 ++++++++++++++++++++++++++++++++++++++++ include/linux/spi/spi.h | 6 ++++++ 2 files changed, 46 insertions(+) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 898cc9931490..8c0c2e26609a 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -2325,6 +2325,46 @@ struct acpi_spi_lookup { int irq_index; }; +static int acpi_spi_count(struct acpi_resource *ares, void *data) +{ + struct acpi_resource_spi_serialbus *sb; + int *count = data; + + if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) + return 1; + + sb = &ares->data.spi_serial_bus; + if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_SPI) + return 1; + + *count = *count + 1; + + return 1; +} + +/** + * acpi_spi_count_resources - Count the number of SpiSerialBus resources + * @adev: ACPI device + * + * Returns the number of SpiSerialBus resources in the ACPI-device's + * resource-list; or a negative error code. + */ +int acpi_spi_count_resources(struct acpi_device *adev) +{ + LIST_HEAD(r); + int count = 0; + int ret; + + ret = acpi_dev_get_resources(adev, &r, acpi_spi_count, &count); + if (ret < 0) + return ret; + + acpi_dev_free_resource_list(&r); + + return count; +} +EXPORT_SYMBOL_GPL(acpi_spi_count_resources); + static void acpi_spi_parse_apple_properties(struct acpi_device *dev, struct acpi_spi_lookup *lookup) { diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 1a34fd0f6ca2..25a82729f8da 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -764,6 +764,7 @@ extern void spi_unregister_controller(struct spi_controller *ctlr); extern struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr, struct acpi_device *adev, int index, int irq_index); +int acpi_spi_count_resources(struct acpi_device *adev); #else static inline struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr, struct acpi_device *adev, @@ -771,6 +772,11 @@ static inline struct spi_device *acpi_spi_device_alloc(struct spi_controller *ct { return ERR_PTR(-EOPNOTSUPP); } + +int acpi_spi_count_resources(struct acpi_device *adev) +{ + return -EOPNOTSUPP; +} #endif /* -- 2.25.1
next prev parent reply other threads:[~2022-01-18 14:54 UTC|newest] Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-18 14:52 [PATCH v3 00/10] Support Spi in i2c-multi-instantiate driver Stefan Binding 2022-01-18 14:52 ` Stefan Binding 2022-01-18 14:52 ` [PATCH v3 01/10] spi: Make spi_alloc_device and spi_add_device public again Stefan Binding 2022-01-18 14:52 ` Stefan Binding 2022-01-18 14:52 ` [PATCH v3 02/10] spi: Create helper API to lookup ACPI info for spi device Stefan Binding 2022-01-18 14:52 ` Stefan Binding 2022-01-18 14:52 ` [PATCH v3 03/10] spi: Support selection of the index of the ACPI Spi Resource before alloc Stefan Binding 2022-01-18 14:52 ` Stefan Binding 2022-01-18 14:52 ` Stefan Binding [this message] 2022-01-18 14:52 ` [PATCH v3 04/10] spi: Add API to count spi acpi resources Stefan Binding 2022-01-18 14:52 ` [PATCH v3 05/10] platform/x86: i2c-multi-instantiate: Move it to drivers/acpi folder Stefan Binding 2022-01-18 14:52 ` Stefan Binding 2022-01-19 16:53 ` Rafael J. Wysocki 2022-01-19 16:53 ` Rafael J. Wysocki 2022-01-19 17:33 ` Lucas tanure 2022-01-19 17:33 ` Lucas tanure 2022-01-19 17:44 ` Rafael J. Wysocki 2022-01-19 17:44 ` Rafael J. Wysocki 2022-01-19 17:48 ` Hans de Goede 2022-01-19 17:48 ` Hans de Goede 2022-01-21 20:11 ` Andy Shevchenko 2022-01-21 20:11 ` Andy Shevchenko 2022-01-18 14:52 ` [PATCH v3 06/10] ACPI: i2c-multi-instantiate: Rename it for a generic bus driver name Stefan Binding 2022-01-18 14:52 ` Stefan Binding 2022-01-18 14:52 ` [PATCH v3 07/10] ACPI: bus-multi-instantiate: Reorganize I2C functions Stefan Binding 2022-01-18 14:52 ` Stefan Binding 2022-01-18 14:52 ` [PATCH v3 08/10] ACPI: bus-multi-instantiate: Add SPI support Stefan Binding 2022-01-18 14:52 ` Stefan Binding 2022-01-18 14:52 ` [PATCH v3 09/10] ALSA: hda/realtek: Add support for HP Laptops Stefan Binding 2022-01-18 14:52 ` Stefan Binding 2022-01-18 14:52 ` [PATCH v3 10/10] ACPI / scan: Create platform device for CS35L41 Stefan Binding 2022-01-18 14:52 ` Stefan Binding
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