From 3482f2c52b77bf6596e24aae82e204a0603eba66 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Thu, 27 Mar 2014 17:18:55 -0700 Subject: [PATCH] of: Create of_console_check() for selecting a console specified in /chosen The devicetree has a binding for specifying the console device in the /chosen node, but the kernel doesn't use it consistently. This change adds an API for testing if a device node is a console, and adds a preferred console entry if it is. At the same time this patch removes the of_device_is_stdout_path() API since it is unused. Signed-off-by: Grant Likely Tested-by: Sascha Hauer --- drivers/of/base.c | 21 ++++++++++++--------- include/linux/of.h | 6 +++--- 2 files changed, 15 insertions(+), 12 deletions(-) diff --git a/drivers/of/base.c b/drivers/of/base.c index b9864806e9b8..df9b2bb7bb27 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -17,6 +17,7 @@ * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ +#include #include #include #include @@ -2180,20 +2181,22 @@ const char *of_prop_next_string(struct property *prop, const char *cur) EXPORT_SYMBOL_GPL(of_prop_next_string); /** - * of_device_is_stdout_path - check if a device node matches the - * linux,stdout-path property + * of_console_check() - Test and setup console for DT setup + * @dn - Pointer to device node + * @name - Name to use for preferred console without index. ex. "ttyS" + * @index - Index to use for preferred console. * - * Check if this device node matches the linux,stdout-path property - * in the chosen node. return true if yes, false otherwise. + * Check if the given device node matches the stdout-path property in the + * /chosen node. If it does then register it as the preferred console and return + * TRUE. Otherwise return FALSE. */ -int of_device_is_stdout_path(struct device_node *dn) +bool of_console_check(struct device_node *dn, char *name, int index) { - if (!of_stdout) + if (!dn || dn != of_stdout || console_set_on_cmdline) return false; - - return of_stdout == dn; + return add_preferred_console(name, index, NULL); } -EXPORT_SYMBOL_GPL(of_device_is_stdout_path); +EXPORT_SYMBOL_GPL(of_console_check); /** * of_find_next_cache_node - Find a node's subsidiary cache diff --git a/include/linux/of.h b/include/linux/of.h index 196b34c1ef4e..9d9734056e39 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -352,7 +352,7 @@ const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur, */ const char *of_prop_next_string(struct property *prop, const char *cur); -int of_device_is_stdout_path(struct device_node *dn); +bool of_console_check(struct device_node *dn, char *name, int index); #else /* CONFIG_OF */ @@ -564,9 +564,9 @@ static inline int of_machine_is_compatible(const char *compat) return 0; } -static inline int of_device_is_stdout_path(struct device_node *dn) +static inline bool of_console_check(const struct device_node *dn, const char *name, int index) { - return 0; + return false; } static inline const __be32 *of_prop_next_u32(struct property *prop,