Re: [PATCH 1/8] of: provide of_machine_get_compatible()
From: "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>
Date: 2026-01-19 11:06:59
Also in:
imx, linux-arm-kernel, linux-devicetree, linux-renesas-soc, linux-sunxi, lkml
Le 19/01/2026 à 11:40, Bartosz Golaszewski a écrit :
Provide a helper function allowing users to read the compatible string of the machine, hiding the access to the root node. Signed-off-by: Bartosz Golaszewski <redacted>
Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
quoted hunk ↗ jump to hunk
--- drivers/of/base.c | 13 +++++++++++++ include/linux/of.h | 2 ++ 2 files changed, 15 insertions(+)diff --git a/drivers/of/base.c b/drivers/of/base.c index 0b65039ece53aa90f30da2420a893a02ab4c6dd8..a7e27d5355929abd6d156b80c52f8f8b08fe6da1 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c@@ -434,6 +434,19 @@ bool of_machine_compatible_match(const char *const *compats) } EXPORT_SYMBOL(of_machine_compatible_match); +/** + * of_machine_get_compatible - Get the compatible string of this machine + * @compatible: address at which the compatible string will be stored + * + * Returns: + * 0 on success, negative error number on failure. + */ +int of_machine_get_compatible(const char **compatible) +{ + return of_property_read_string(of_root, "compatible", compatible); +} +EXPORT_SYMBOL_GPL(of_machine_get_compatible); + /** * of_machine_device_match - Test root of device tree against a of_device_id array * @matches: NULL terminated array of of_device_id match structures to search indiff --git a/include/linux/of.h b/include/linux/of.h index 9bbdcf25a2b448ba4ec5ddee8b35a105ca4aab8b..75423fb556ee4c108ce25144a0bdc252a89f7d1d 100644 --- a/include/linux/of.h +++ b/include/linux/of.h@@ -426,6 +426,8 @@ static inline bool of_machine_is_compatible(const char *compat) return of_machine_compatible_match(compats); } +int of_machine_get_compatible(const char **compatible); + extern int of_add_property(struct device_node *np, struct property *prop); extern int of_remove_property(struct device_node *np, struct property *prop); extern int of_update_property(struct device_node *np, struct property *newprop);