WSL2-Linux-Kernel/drivers/mtd/maps/physmap-ixp4xx.h

/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/of.h>
#include <linux/mtd/map.h>

#ifdef CONFIG_MTD_PHYSMAP_IXP4XX
int of_flash_probe_ixp4xx(struct platform_device *pdev,
			  struct device_node *np,
			  struct map_info *map);
#else
static inline
int of_flash_probe_ixp4xx(struct platform_device *pdev,
			  struct device_node *np,
			  struct map_info *map)
{
	return 0;
}
#endif
mtd: physmap_of: add a hook for Intel IXP4xx flash probing In order to support device tree probing of IXP4xx NOR flash chips, a certain big-endian or mixed-endian memory access pattern need to be used. I have opted to use the pattern set by previous plug-ins to physmap for Gemini and Versatile, just override some functions and reuse most of the physmap core code as it is to minimize maintenance. Parts of drivers/mtd/ixp4xx.c are copied into this file. After we have IXP4xx converted fully to device tree, the drivers/mtd/ixp4xx.c file will be deleted and this will be the only access pattern to the IXP4xx flash. I did not keep the quirk in the flash write function after probe, where the old code for a while checks for access to odd addresses, fails and assigns a "faster" write function once it has convinced probe to only use 2-byte accesses. As we mandate that this device should be using bank-width = <2> this should not be a problem unless misconfigured. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> 2019-10-21 02:00:42 +03:00			`/* SPDX-License-Identifier: GPL-2.0 */`
			`#include <linux/of.h>`
			`#include <linux/mtd/map.h>`

			`#ifdef CONFIG_MTD_PHYSMAP_IXP4XX`
			`int of_flash_probe_ixp4xx(struct platform_device *pdev,`
			`struct device_node *np,`
			`struct map_info *map);`
			`#else`
			`static inline`
			`int of_flash_probe_ixp4xx(struct platform_device *pdev,`
			`struct device_node *np,`
			`struct map_info *map)`
			`{`
			`return 0;`
			`}`
			`#endif`