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Wed, 17 Dec 2025 10:52:01 +0000 Message-ID: Date: Wed, 17 Dec 2025 11:51:51 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v10 1/3] spi: export of_find_spi_controller_by_node() To: Oder Chiou CC: , , , , , , , , , , , , , References: <20251216071853.3929135-1-oder_chiou@realtek.com> <20251216071853.3929135-2-oder_chiou@realtek.com> Content-Language: en-US From: Cezary Rojewski In-Reply-To: <20251216071853.3929135-2-oder_chiou@realtek.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: VI1PR04CA0071.eurprd04.prod.outlook.com (2603:10a6:802:2::42) To SN7PR11MB8283.namprd11.prod.outlook.com (2603:10b6:806:26c::16) Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN7PR11MB8283:EE_|PH7PR11MB7429:EE_ X-MS-Office365-Filtering-Correlation-Id: 0407cd46-a59f-4416-794d-08de3d5a4ead X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014|7416014|7053199007; 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Export of_find_spi_controller_by_node() so drivers can > obtain the SPI controller referenced by a DT phandle. One nitpick below, otherwise looks good. Reviewed-by: Cezary Rojewski > > Signed-off-by: Oder Chiou > --- > drivers/spi/spi.c | 3 ++- > include/linux/spi/spi.h | 11 +++++++++++ > 2 files changed, 13 insertions(+), 1 deletion(-) > > diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c > index e25df9990f82..ecb5281b04a2 100644 > --- a/drivers/spi/spi.c > +++ b/drivers/spi/spi.c > @@ -4771,7 +4771,7 @@ static struct spi_device *of_find_spi_device_by_node(struct device_node *node) > } > > /* The spi controllers are not using spi_bus, so we find it with another way */ > -static struct spi_controller *of_find_spi_controller_by_node(struct device_node *node) > +struct spi_controller *of_find_spi_controller_by_node(struct device_node *node) > { > struct device *dev; > > @@ -4784,6 +4784,7 @@ static struct spi_controller *of_find_spi_controller_by_node(struct device_node > /* Reference got in class_find_device */ > return container_of(dev, struct spi_controller, dev); > } > +EXPORT_SYMBOL_GPL(of_find_spi_controller_by_node); > > static int of_spi_notify(struct notifier_block *nb, unsigned long action, > void *arg) > diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h > index cb2c2df31089..1eb04a96cc1c 100644 > --- a/include/linux/spi/spi.h > +++ b/include/linux/spi/spi.h > @@ -882,6 +882,17 @@ extern int devm_spi_register_controller(struct device *dev, > struct spi_controller *ctlr); > extern void spi_unregister_controller(struct spi_controller *ctlr); > > +#if IS_ENABLED(CONFIG_OF_DYNAMIC) > +extern struct spi_controller *of_find_spi_controller_by_node( > + struct device_node *node); > +#else > +static inline struct spi_controller *of_find_spi_controller_by_node( > + struct device_node *node) For both declarations, just make them one-liners. Fits the limit, even for the inliner case: static inline struct spi_controller *of_find_spi_controller_by_node(struct device_node *node) > +{ > + return NULL; > +} > +#endif > + > #if IS_ENABLED(CONFIG_ACPI) && IS_ENABLED(CONFIG_SPI_MASTER) > extern struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev); > extern struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr,