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| author | Grant Likely <grant.likely@linaro.org> | 2014-03-27 17:18:55 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@linaro.org> | 2014-06-26 17:12:22 +0100 |
| commit | 3482f2c52b77bf6596e24aae82e204a0603eba66 (patch) | |
| tree | 60af2ac594655852208091c69c4197964e80a0da /drivers/of/base.c | |
| parent | a497c3ba1d97fc69c1e78e7b96435ba8c2cb42ee (diff) | |
| download | lwn-3482f2c52b77bf6596e24aae82e204a0603eba66.tar.gz lwn-3482f2c52b77bf6596e24aae82e204a0603eba66.zip | |
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 <grant.likely@linaro.org>
Tested-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/of/base.c')
| -rw-r--r-- | drivers/of/base.c | 23 |
1 files changed, 13 insertions, 10 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 <linux/console.h> #include <linux/ctype.h> #include <linux/cpu.h> #include <linux/module.h> @@ -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 - * - * Check if this device node matches the linux,stdout-path property - * in the chosen node. return true if yes, false otherwise. + * 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 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 |