linux-kernel - [PATCH 09/11] platform: provide early_platform

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Message-Id: <20180424173051.15099-10-brgl@bgdev.pl>
Date:   Tue, 24 Apr 2018 19:30:49 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Sekhar Nori <nsekhar@...com>, Kevin Hilman <khilman@...nel.org>,
        David Lechner <david@...hnology.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Frank Rowand <frowand.list@...il.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Arend van Spriel <aspriel@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Michal Suchanek <msuchanek@...e.de>,
        Jan Kiszka <jan.kiszka@...mens.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 09/11] platform: provide early_platform_driver()

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

Implement a macro similar to module_platform_driver() which allows to
register early platform drivers with the default early class.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 include/linux/platform_device.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 514ada776004..b565a1237fa6 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -297,6 +297,8 @@ struct early_platform_driver {
 #define EARLY_PLATFORM_ID_UNSET -2
 #define EARLY_PLATFORM_ID_ERROR -3
 
+#define EARLY_PLATFORM_DEFAULT_CLASS	"earlydev"
+
 #ifdef CONFIG_EARLY_PLATFORM_DEVICES
 
 extern int early_platform_driver_register(struct early_platform_driver *epdrv,
@@ -352,6 +354,9 @@ static inline char *early_platform_driver_setup_func(void)		\
 }
 #endif /* MODULE */
 
+#define early_platform_driver(__platdrv)				\
+	early_platform_init(EARLY_PLATFORM_DEFAULT_CLASS, &(__platdrv))
+
 #else /* CONFIG_EARLY_PLATFORM_DEVICES */
 static inline int
 early_platform_driver_register(struct early_platform_driver *epdrv, char *buf)
@@ -380,6 +385,7 @@ static inline int early_platform_driver_register_probe_all(char *class_str,
 static inline void early_platform_cleanup(void) {}
 #define early_platform_init(class_string, platdrv)
 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz)
+#define early_platform_driver(__platdrv)
 #endif /* CONFIG_EARLY_PLATFORM_DEVICES */
 
 #ifdef CONFIG_SUSPEND
-- 
2.17.0