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authorBartosz Golaszewski <bgolaszewski@baylibre.com>2019-10-03 12:29:12 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-10-07 14:50:47 +0300
commit507fd01d5333338753a1cc26322dfc9f856c109f (patch)
tree1c15e4d8e2be9ae306d0c72f165357eace49df9e /include/linux/platform_device.h
parentd4387cd117414ba80230f27a514be5ca4a09cfcc (diff)
downloadlinux-507fd01d5333338753a1cc26322dfc9f856c109f.tar.xz
drivers: move the early platform device support to arch/sh
SuperH is the only user of the current implementation of early platform device support. We want to introduce a more robust approach to early probing. As the first step - move all the current early platform code to arch/sh. In order not to export internal drivers/base functions to arch code for this temporary solution - copy the two needed routines for driver matching from drivers/base/platform.c to arch/sh/drivers/platform_early.c. Also: call early_platform_cleanup() from subsys_initcall() so that it's called after all early devices are probed. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Cc: Rich Felker <dalias@libc.org> Link: https://lore.kernel.org/r/20191003092913.10731-2-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/platform_device.h')
-rw-r--r--include/linux/platform_device.h64
1 files changed, 12 insertions, 52 deletions
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 1b5cec067533..85aa28a041a9 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -292,58 +292,6 @@ void platform_unregister_drivers(struct platform_driver * const *drivers,
#define platform_register_drivers(drivers, count) \
__platform_register_drivers(drivers, count, THIS_MODULE)
-/* early platform driver interface */
-struct early_platform_driver {
- const char *class_str;
- struct platform_driver *pdrv;
- struct list_head list;
- int requested_id;
- char *buffer;
- int bufsize;
-};
-
-#define EARLY_PLATFORM_ID_UNSET -2
-#define EARLY_PLATFORM_ID_ERROR -3
-
-extern int early_platform_driver_register(struct early_platform_driver *epdrv,
- char *buf);
-extern void early_platform_add_devices(struct platform_device **devs, int num);
-
-static inline int is_early_platform_device(struct platform_device *pdev)
-{
- return !pdev->dev.driver;
-}
-
-extern void early_platform_driver_register_all(char *class_str);
-extern int early_platform_driver_probe(char *class_str,
- int nr_probe, int user_only);
-extern void early_platform_cleanup(void);
-
-#define early_platform_init(class_string, platdrv) \
- early_platform_init_buffer(class_string, platdrv, NULL, 0)
-
-#ifndef MODULE
-#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
-static __initdata struct early_platform_driver early_driver = { \
- .class_str = class_string, \
- .buffer = buf, \
- .bufsize = bufsiz, \
- .pdrv = platdrv, \
- .requested_id = EARLY_PLATFORM_ID_UNSET, \
-}; \
-static int __init early_platform_driver_setup_func(char *buffer) \
-{ \
- return early_platform_driver_register(&early_driver, buffer); \
-} \
-early_param(class_string, early_platform_driver_setup_func)
-#else /* MODULE */
-#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
-static inline char *early_platform_driver_setup_func(void) \
-{ \
- return bufsiz ? buf : NULL; \
-}
-#endif /* MODULE */
-
#ifdef CONFIG_SUSPEND
extern int platform_pm_suspend(struct device *dev);
extern int platform_pm_resume(struct device *dev);
@@ -378,4 +326,16 @@ extern int platform_dma_configure(struct device *dev);
#define USE_PLATFORM_PM_SLEEP_OPS
#endif
+#ifndef CONFIG_SUPERH
+/*
+ * REVISIT: This stub is needed for all non-SuperH users of early platform
+ * drivers. It should go away once we introduce the new platform_device-based
+ * early driver framework.
+ */
+static inline int is_early_platform_device(struct platform_device *pdev)
+{
+ return 0;
+}
+#endif /* CONFIG_SUPERH */
+
#endif /* _PLATFORM_DEVICE_H_ */