From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: linux-kernel@vger.kernel.org
Cc: gregkh@linuxfoundation.org, rafael@kernel.org,
suzuki.poulose@arm.com, "Eric Anholt" <eric@anholt.net>,
"Heiko Stübner" <heiko@sntech.de>,
"Inki Dae" <inki.dae@samsung.com>,
"Sandy Huang" <hjc@rock-chips.com>,
"Seung-Woo Kim" <sw0312.kim@samsung.com>
Subject: [PATCH 13/13] platform: Add platform_find_device_by_driver() helper
Date: Wed, 5 Jun 2019 16:13:50 +0100 [thread overview]
Message-ID: <1559747630-28065-14-git-send-email-suzuki.poulose@arm.com> (raw)
In-Reply-To: <1559747630-28065-1-git-send-email-suzuki.poulose@arm.com>
Provide a helper to lookup platform devices by matching device
driver in order to avoid drivers trying to use platform bus
internals.
Cc: Eric Anholt <eric@anholt.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Heiko Stübner" <heiko@sntech.de>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Sandy Huang <hjc@rock-chips.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
drivers/base/platform.c | 14 ++++++++++++++
include/linux/platform_device.h | 3 +++
2 files changed, 17 insertions(+)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 4d17298..158ac24 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -1197,6 +1197,20 @@ struct bus_type platform_bus_type = {
};
EXPORT_SYMBOL_GPL(platform_bus_type);
+/**
+ * platform_find_device_by_driver - Find a platform device with a given
+ * driver.
+ * @start: The device to start the search from.
+ * @drv: The device driver to look for.
+ */
+struct device *platform_find_device_by_driver(struct device *start,
+ const struct device_driver *drv)
+{
+ return bus_find_device(&platform_bus_type, start, drv,
+ (void *)platform_match);
+}
+EXPORT_SYMBOL_GPL(platform_find_device_by_driver);
+
int __init platform_bus_init(void)
{
int error;
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index cc46485..36aa775 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -52,6 +52,9 @@ extern struct device platform_bus;
extern void arch_setup_pdev_archdata(struct platform_device *);
extern struct resource *platform_get_resource(struct platform_device *,
unsigned int, unsigned int);
+extern struct device *
+platform_find_device_by_driver(struct device * dev,
+ const struct device_driver *drv);
extern void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index);
--
2.7.4
prev parent reply other threads:[~2019-06-05 15:15 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1559747630-28065-1-git-send-email-suzuki.poulose@arm.com>
2019-06-05 15:13 ` [PATCH 01/13] acpi: utils: Cleanup acpi_dev_match_cb Suzuki K Poulose
2019-06-06 9:14 ` Rafael J. Wysocki
2019-06-06 9:21 ` Suzuki K Poulose
2019-06-05 15:13 ` [PATCH 02/13] bus_find_device: Unify the match callback with class_find_device Suzuki K Poulose
2019-06-05 15:48 ` Corey Minyard
2019-06-05 15:51 ` Kershner, David A
2019-06-05 18:18 ` Mark Brown
2019-06-06 8:56 ` Rafael J. Wysocki
2019-06-06 9:01 ` Srinivas Kandagatla
2019-06-05 15:13 ` [PATCH 03/13] driver_find_device: Unify the match function with class_find_device() Suzuki K Poulose
2019-06-12 9:32 ` Lee Jones
2019-06-12 9:36 ` Suzuki K Poulose
2019-06-05 15:13 ` [PATCH 04/13] drivers: Add generic helper to match by of_node Suzuki K Poulose
2019-06-05 15:13 ` [PATCH 05/13] drivers: Add generic helper to match by fwnode Suzuki K Poulose
2019-06-05 15:13 ` [PATCH 06/13] drivers: Add generic helper to match by devt Suzuki K Poulose
2019-06-05 15:13 ` [PATCH 07/13] drivers: Add generic match helper by ACPI_COMPANION device Suzuki K Poulose
2019-06-06 9:17 ` Rafael J. Wysocki
2019-06-06 9:28 ` Suzuki K Poulose
2019-06-06 9:57 ` Rafael J. Wysocki
2019-06-12 9:43 ` Suzuki K Poulose
2019-06-12 22:07 ` Rafael J. Wysocki
2019-06-05 15:13 ` [PATCH 08/13] drivers: Add generic helper to match by name Suzuki K Poulose
2019-06-05 15:13 ` [PATCH 09/13] drivers: Add generic helper to match any device Suzuki K Poulose
2019-06-05 15:13 ` [PATCH 10/13] drivers: Introduce variants of class_find_device() Suzuki K Poulose
2019-06-05 16:14 ` Greg KH
2019-06-05 18:13 ` Suzuki K Poulose
2019-06-05 15:13 ` [PATCH 11/13] drivers: Introduce variants for bus_find_device() Suzuki K Poulose
2019-06-05 15:13 ` [PATCH 12/13] drivers: Introduce variants of driver_find_device() Suzuki K Poulose
2019-06-05 15:13 ` Suzuki K Poulose [this message]
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