From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: [PATCH v6 02/14] of: reserved-memory: Support lookup of regions by name Date: Thu, 9 Apr 2020 19:52:26 +0200 Message-ID: <20200409175238.3586487-3-thierry.reding@gmail.com> References: <20200409175238.3586487-1-thierry.reding@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20200409175238.3586487-1-thierry.reding@gmail.com> Sender: linux-clk-owner@vger.kernel.org To: Thierry Reding , Rob Herring Cc: Jon Hunter , Dmitry Osipenko , Michael Turquette , Stephen Boyd , Joseph Lo , linux-tegra@vger.kernel.org, devicetree@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: linux-tegra@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 1a84bc0d5fa8..ed2ff6f01d32 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -357,6 +357,25 @@ 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' 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