From: Daniel Scally <djrscally@gmail.com>
To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org,
platform-driver-x86@vger.kernel.org, devel@acpica.org
Cc: rjw@rjwysocki.net, lenb@kernel.org, andy@kernel.org,
mika.westerberg@linux.intel.com, linus.walleij@linaro.org,
bgolaszewski@baylibre.com, wsa@kernel.org, lee.jones@linaro.org,
hdegoede@redhat.com, mgross@linux.intel.com,
robert.moore@intel.com, erik.kaneda@intel.com,
sakari.ailus@linux.intel.com, andriy.shevchenko@linux.intel.com,
laurent.pinchart@ideasonboard.com,
kieran.bingham@ideasonboard.com
Subject: [PATCH v2 4/7] i2c: i2c-core-acpi: Add i2c_acpi_dev_name()
Date: Mon, 18 Jan 2021 00:34:25 +0000 [thread overview]
Message-ID: <20210118003428.568892-5-djrscally@gmail.com> (raw)
In-Reply-To: <20210118003428.568892-1-djrscally@gmail.com>
We want to refer to an i2c device by name before it has been
created by the kernel; add a function that constructs the name
from the acpi device instead.
Signed-off-by: Daniel Scally <djrscally@gmail.com>
---
Changes in v2:
- Stopped using devm_kasprintf()
drivers/i2c/i2c-core-acpi.c | 16 ++++++++++++++++
include/linux/i2c.h | 5 +++++
2 files changed, 21 insertions(+)
diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 37c510d9347a..98c3ba9a2350 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -497,6 +497,22 @@ struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
}
EXPORT_SYMBOL_GPL(i2c_acpi_new_device);
+/**
+ * i2c_acpi_dev_name - Construct i2c device name for devs sourced from ACPI
+ * @adev: ACPI device to construct the name for
+ *
+ * Constructs the name of an i2c device matching the format used by
+ * i2c_dev_set_name() to allow users to refer to an i2c device by name even
+ * before they have been instantiated.
+ *
+ * The caller is responsible for freeing the returned pointer.
+ */
+char *i2c_acpi_dev_name(struct acpi_device *adev)
+{
+ return kasprintf(GFP_KERNEL, I2C_DEV_NAME_FORMAT, acpi_dev_name(adev));
+}
+EXPORT_SYMBOL_GPL(i2c_acpi_dev_name);
+
#ifdef CONFIG_ACPI_I2C_OPREGION
static int acpi_gsb_i2c_read_bytes(struct i2c_client *client,
u8 cmd, u8 *data, u8 data_len)
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 4d40a4b46810..b82aac05b17f 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -998,6 +998,7 @@ bool i2c_acpi_get_i2c_resource(struct acpi_resource *ares,
u32 i2c_acpi_find_bus_speed(struct device *dev);
struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
struct i2c_board_info *info);
+char *i2c_acpi_dev_name(struct acpi_device *adev);
struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle);
#else
static inline bool i2c_acpi_get_i2c_resource(struct acpi_resource *ares,
@@ -1014,6 +1015,10 @@ static inline struct i2c_client *i2c_acpi_new_device(struct device *dev,
{
return ERR_PTR(-ENODEV);
}
+static inline char *i2c_acpi_dev_name(struct acpi_device *adev)
+{
+ return NULL;
+}
static inline struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)
{
return NULL;
--
2.25.1
next prev parent reply other threads:[~2021-01-18 0:36 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-18 0:34 [PATCH v2 0/7] Introduce intel_skl_int3472 driver Daniel Scally
2021-01-18 0:34 ` [PATCH v2 1/7] acpi: utils: move acpi_lpss_dep() to utils Daniel Scally
2021-01-18 7:24 ` Laurent Pinchart
2021-01-18 8:31 ` Daniel Scally
2021-01-18 12:29 ` Andy Shevchenko
2021-01-18 12:35 ` Daniel Scally
2021-01-18 12:28 ` Andy Shevchenko
2021-01-18 16:06 ` Rafael J. Wysocki
2021-01-18 16:42 ` Andy Shevchenko
2021-01-18 0:34 ` [PATCH v2 2/7] acpi: utils: Add function to fetch dependent acpi_devices Daniel Scally
2021-01-18 7:34 ` Laurent Pinchart
2021-01-18 8:37 ` Daniel Scally
2021-01-18 12:33 ` Andy Shevchenko
2021-01-18 13:37 ` Daniel Scally
2021-01-18 16:14 ` Rafael J. Wysocki
2021-01-18 20:51 ` Daniel Scally
2021-01-19 13:15 ` Rafael J. Wysocki
2021-01-19 13:28 ` Daniel Scally
2021-01-21 9:47 ` Daniel Scally
2021-01-21 11:58 ` Rafael J. Wysocki
2021-01-21 12:04 ` Daniel Scally
2021-01-21 14:39 ` Rafael J. Wysocki
2021-01-21 16:34 ` Daniel Scally
2021-01-21 18:08 ` Rafael J. Wysocki
2021-01-21 21:06 ` Daniel Scally
2021-02-02 9:58 ` Daniel Scally
2021-02-02 11:27 ` Andy Shevchenko
2021-02-02 14:02 ` Rafael J. Wysocki
2021-01-18 0:34 ` [PATCH v2 3/7] i2c: i2c-core-base: Use format macro in i2c_dev_set_name() Daniel Scally
2021-01-18 7:28 ` Laurent Pinchart
2021-01-18 12:41 ` Andy Shevchenko
2021-01-18 9:41 ` Sakari Ailus
2021-01-18 9:42 ` Sakari Ailus
2021-01-18 9:48 ` Wolfram Sang
2021-01-18 12:39 ` Andy Shevchenko
2021-01-18 0:34 ` Daniel Scally [this message]
2021-01-18 9:18 ` [PATCH v2 4/7] i2c: i2c-core-acpi: Add i2c_acpi_dev_name() Laurent Pinchart
2021-01-18 13:41 ` Andy Shevchenko
2021-01-19 13:19 ` Rafael J. Wysocki
2021-01-28 9:00 ` Wolfram Sang
2021-01-28 9:15 ` Daniel Scally
2021-01-28 9:17 ` Wolfram Sang
2021-01-28 9:22 ` Daniel Scally
2021-01-18 13:39 ` Andy Shevchenko
2021-01-18 18:43 ` Joe Perches
2021-01-18 18:56 ` Andy Shevchenko
2021-01-18 19:00 ` Joe Perches
2021-01-18 19:01 ` Andy Shevchenko
2021-01-18 0:34 ` [PATCH v2 5/7] gpio: gpiolib-acpi: Export acpi_get_gpiod() Daniel Scally
2021-01-18 7:37 ` Laurent Pinchart
2021-01-18 13:45 ` Andy Shevchenko
2021-01-18 13:46 ` Andy Shevchenko
2021-01-18 21:32 ` Daniel Scally
2021-01-18 0:34 ` [PATCH v2 6/7] platform: x86: Add intel_skl_int3472 driver Daniel Scally
2021-01-18 9:15 ` Laurent Pinchart
2021-01-18 14:46 ` Andy Shevchenko
2021-01-18 21:19 ` Daniel Scally
2021-01-19 0:11 ` Daniel Scally
2021-01-19 6:21 ` Laurent Pinchart
2021-01-19 9:35 ` Andy Shevchenko
2021-01-19 16:49 ` Laurent Pinchart
2021-01-19 9:33 ` Andy Shevchenko
2021-01-19 9:34 ` Daniel Scally
2021-01-19 16:36 ` Laurent Pinchart
2021-01-19 17:43 ` Andy Shevchenko
2021-01-20 4:18 ` Laurent Pinchart
2021-01-20 11:44 ` Andy Shevchenko
2021-01-21 21:08 ` Daniel Scally
2021-01-19 9:24 ` Andy Shevchenko
2021-01-19 10:40 ` Daniel Scally
2021-01-19 11:08 ` Andy Shevchenko
2021-01-19 16:48 ` Laurent Pinchart
2021-01-19 17:51 ` Andy Shevchenko
2021-01-20 4:21 ` Laurent Pinchart
2021-01-20 12:57 ` Andy Shevchenko
2021-01-21 0:18 ` Daniel Scally
2021-02-07 11:00 ` Daniel Scally
2021-02-07 11:56 ` Andy Shevchenko
2021-01-18 20:46 ` Daniel Scally
2021-01-19 6:19 ` Laurent Pinchart
2021-01-19 8:43 ` Daniel Scally
2021-01-19 16:33 ` Laurent Pinchart
2021-01-18 11:12 ` Barnabás Pőcze
2021-01-18 13:51 ` andriy.shevchenko
2021-01-18 14:51 ` Barnabás Pőcze
2021-01-18 15:23 ` andriy.shevchenko
2021-01-18 15:32 ` Hans de Goede
2021-01-18 15:48 ` andriy.shevchenko
2021-01-18 16:00 ` Daniel Scally
2021-01-18 16:03 ` Hans de Goede
2021-01-18 17:05 ` Laurent Pinchart
2021-01-19 10:56 ` Kieran Bingham
2021-01-19 11:11 ` Andy Shevchenko
2021-01-19 11:12 ` Daniel Scally
2021-01-18 0:34 ` [PATCH v2 7/7] mfd: Remove tps68470 MFD driver Daniel Scally
2021-01-18 7:42 ` Laurent Pinchart
2021-01-18 13:53 ` Andy Shevchenko
2021-01-18 20:07 ` Joe Perches
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