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Wysocki" , Danilo Krummrich , "Christophe Leroy (CS GROUP)" , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Geert Uytterhoeven , Magnus Damm , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Frank Li Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev, linux-renesas-soc@vger.kernel.org, linux-sunxi@lists.linux.dev, driver-core@lists.linux.dev, Bartosz Golaszewski X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2454; i=bartosz.golaszewski@oss.qualcomm.com; h=from:subject:message-id; bh=QPmNRNSabXl3r0S7jPuSa+7dPpXvOPNSvq8pxO+7W4U=; b=owEBbQKS/ZANAwAKAQWdLsv/NoTDAcsmYgBpnFgZHBYkzb/CkVSuWiIkaFvkB1D7XlGgt7SZk chVZS6T0G+JAjMEAAEKAB0WIQSR5RMt5bVGHXuiZfwFnS7L/zaEwwUCaZxYGQAKCRAFnS7L/zaE w+QED/9rJEQy7HuSo0BQ9ZoeKG0P8FHVreYTHlCWGpsvaRCRMVMEZyB4slmYakmKcWwbnLENZY+ 1jIDpUXY5mLSHXTBrvHdUX6k60h0nmSOtaSHaJ5CwTfVjYRZOIFm/d4lNiJWerGRMV4SQe4X3ja ElpspUQUiXTLqsn/oKdVztBdHfQ6dBu1h6OxB2jg7DTnJ6AetZfAhGOhrKSrpBxUEiHqsUzniBf Qag5wN7j1cez9TTi1UBpsMw6M2SvVq8S0qOP5bjLmfgCM19TW6oj+mzMS5upC5HYbqPxUQPaB+v P60UueWK9KgDiWBdgNtF7igKVWiFUTIEWQ6QMcJXKpoEERLk+oq8SMJdcijxhcZajFfXLZ8ouPb 7JVcABKecdQB2lD02pkMg3U3BQVszqyyGcfNur/rhPdzgIclUBm8MnHdp9vSje5kjv9en9QKHJ7 CW7zKKKB9MU7VCUdHsUfXx18MOWWzL8fPwQ4+f8fmMkJVNPopP10lUZ8soUJDtOHhihRMiplcJ0 rkeqaq6C7WB9ZccLKFP7/4brEWVRkh3IYNwuisoflhZHx81R9osQr0U+ln92f0YFQukvCpWQOU+ q9SJQrjsARlsv7DOFf7Er6rfjK+fnpLqp2sGBwUL78PcdMaGpX/udpqn/CgJO8S9HPHgVVsOBrg xHABeyImOD8ufjQ== X-Developer-Key: i=bartosz.golaszewski@oss.qualcomm.com; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 X-Proofpoint-GUID: BBF1Yy4LUhd73SdYwHT8Bx7yHjFihSZk X-Proofpoint-ORIG-GUID: BBF1Yy4LUhd73SdYwHT8Bx7yHjFihSZk X-Authority-Analysis: v=2.4 cv=CbsFJbrl c=1 sm=1 tr=0 ts=699c5829 cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=aMBEx6ZYl_lYKPCdRXsA:9 a=QEXdDO2ut3YA:10 a=NFOGd7dJGGMPyQGDc5-O:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjIzMDExNyBTYWx0ZWRfX9CURGDW18Pxo Qo50WQKXevLH1iR3omsIAFTnbfr1jW+AGm9ua+hAMDTwsXQqeMExpoHsfsAV2cLv+ZEsRjm7yi0 jLseoJCBK2WqWkCrH1PngW04gYHvVN1X8e51xf0FY9C1egnqr4pXmuw2WsTWSrlz84yo6I/bTU4 JJ5Fq1mzNVRmV+dnlINcXEUHNQpR1s9edPb/87hXAPbTEG4HVU/23N5S4TAwAfm0ZpJNewJe6yX qtvxjan/PSTLbCq4e2BDq/C4nU88xGbQWfUvg7U3QXdCcCXqT+WkoiIiSUMpvbYZd8jf3zJYAvy nyb6T6cF1X8gWZlnriaFzjf+GlWhS6mi2c7q9S3ITY+eW+7WRDlaVIlJrlkDbgN1NPZ5mcw47ds zN7CodSnbz+zvZyyJdym7iBNcuLl6FCdXShwDCoIq5AsS56Vcw/k3IGGUYg5HuKeGgVtsCVROJp cbY6KQ0WGpYIYbvN6iw== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-23_02,2026-02-23_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 impostorscore=0 priorityscore=1501 suspectscore=0 phishscore=0 spamscore=0 malwarescore=0 clxscore=1015 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2602230117 Status: O Provide a helper function allowing users to read the compatible string of the machine, hiding the access to the root node. Reviewed-by: Christophe Leroy (CS GROUP) Signed-off-by: Bartosz Golaszewski --- drivers/of/base.c | 15 +++++++++++++++ include/linux/of.h | 8 ++++++++ 2 files changed, 23 insertions(+) diff --git a/drivers/of/base.c b/drivers/of/base.c index 57420806c1a2b9a3c67b5dcc0f95610a87c2e46f..b70aec32e0e35ee232b413e548742491bf763df7 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -434,6 +434,21 @@ bool of_machine_compatible_match(const char *const *compats) } EXPORT_SYMBOL(of_machine_compatible_match); +/** + * of_machine_read_compatible - Get the compatible string of this machine + * @compatible: address at which the address of the compatible string will be + * stored + * @index: index of the compatible entry in the list + * + * Returns: + * 0 on success, negative error number on failure. + */ +int of_machine_read_compatible(const char **compatible, unsigned int index) +{ + return of_property_read_string_index(of_root, "compatible", index, compatible); +} +EXPORT_SYMBOL_GPL(of_machine_read_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 in diff --git a/include/linux/of.h b/include/linux/of.h index be6ec4916adf522aa5e4dcb1480fe91e1a4e29d2..7df971d52b556f21b510a8b5ebfc8df49a2a6f64 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_read_compatible(const char **compatible, unsigned int index); + 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); @@ -851,6 +853,12 @@ static inline int of_machine_is_compatible(const char *compat) return 0; } +static inline int of_machine_read_compatible(const char **compatible, + unsigned int index) +{ + return -ENOSYS; +} + static inline int of_add_property(struct device_node *np, struct property *prop) { return 0;