linux-kernel - [PATCH 3/6] mfd: core: add helper function to register hotplug devices

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Date:	Fri, 26 Sep 2014 12:55:30 +0200
From:	Johan Hovold <johan@...nel.org>
To:	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>
Cc:	Jiri Kosina <jkosina@...e.cz>, linux-input@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	Johan Hovold <johan@...nel.org>
Subject: [PATCH 3/6] mfd: core: add helper function to register hotplug devices

Hot-pluggable multi-function devices should always be registered with
PLATFORM_DEVID_AUTO to avoid name collisions on the platform bus. This
helper also hides the memory map and irq parameters, which aren't used
by hot-pluggable (e.g. USB-based) devices.

Signed-off-by: Johan Hovold <johan@...nel.org>
---
 include/linux/mfd/core.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h
index f543de91ce19..1e47262a1c63 100644
--- a/include/linux/mfd/core.h
+++ b/include/linux/mfd/core.h
@@ -108,6 +108,13 @@ extern int mfd_add_devices(struct device *parent, int id,
 			   struct resource *mem_base,
 			   int irq_base, struct irq_domain *irq_domain);
 
+static inline int mfd_add_hotplug_devices(struct device *parent,
+		const struct mfd_cell *cells, int n_devs)
+{
+	return mfd_add_devices(parent, PLATFORM_DEVID_AUTO, cells, n_devs,
+			NULL, 0, NULL);
+}
+
 extern void mfd_remove_devices(struct device *parent);
 
 #endif
-- 
1.8.5.5

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