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[217.229.28.220]) by smtp.gmail.com with ESMTPSA id n7sm12592296wmf.4.2020.04.03.11.56.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Apr 2020 11:56:51 -0700 (PDT) From: Thierry Reding To: Rob Herring , Frank Rowand Cc: devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/4] of: reserved-memory: Support lookup of regions by name Date: Fri, 3 Apr 2020 20:56:39 +0200 Message-Id: <20200403185640.118569-4-thierry.reding@gmail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200403185640.118569-1-thierry.reding@gmail.com> References: <20200403185640.118569-1-thierry.reding@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Thierry Reding Add support for looking up memory regions by name. This looks up the given name in the newly introduced memory-region-names property and returns the memory region at the corresponding index in the memory- region(s) property. Signed-off-by: Thierry Reding --- drivers/of/of_reserved_mem.c | 19 +++++++++++++++++++ include/linux/of_reserved_mem.h | 11 +++++++++++ 2 files changed, 30 insertions(+) diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 62a35422c28d..dae70b147552 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -360,6 +360,25 @@ int of_reserved_mem_device_init_by_idx(struct device *dev, } EXPORT_SYMBOL_GPL(of_reserved_mem_device_init_by_idx); +/** + * of_reserved_mem_device_init_by_name() - assign named reserved memory region + * to given device + * @dev: pointer to the device to configure + * @np: pointer to the device node with 'memory-region(s)' property + * @name: name of the selected memory region + * + * Returns: 0 on success or a negative error-code on failure. + */ +int of_reserved_mem_device_init_by_name(struct device *dev, + struct device_node *np, + const char *name) +{ + int idx = of_property_match_string(np, "memory-region-names", name); + + return of_reserved_mem_device_init_by_idx(dev, np, idx); +} +EXPORT_SYMBOL_GPL(of_reserved_mem_device_init_by_name); + /** * of_reserved_mem_device_release() - release reserved memory device structures * @dev: Pointer to the device to deconfigure diff --git a/include/linux/of_reserved_mem.h b/include/linux/of_reserved_mem.h index 60f541912ccf..a1b427ac291b 100644 --- a/include/linux/of_reserved_mem.h +++ b/include/linux/of_reserved_mem.h @@ -33,6 +33,9 @@ typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem); int of_reserved_mem_device_init_by_idx(struct device *dev, struct device_node *np, int idx); +int of_reserved_mem_device_init_by_name(struct device *dev, + struct device_node *np, + const char *name); void of_reserved_mem_device_release(struct device *dev); void fdt_init_reserved_mem(void); @@ -45,6 +48,14 @@ static inline int of_reserved_mem_device_init_by_idx(struct device *dev, { return -ENOSYS; } + +static inline int of_reserved_mem_device_init_by_name(struct device *dev, + struct device_node *np, + const char *name) +{ + return -ENOSYS; +} + static inline void of_reserved_mem_device_release(struct device *pdev) { } static inline void fdt_init_reserved_mem(void) { } -- 2.24.1