1 // SPDX-License-Identifier: GPL-2.0
3  * Cortina Systems Gemini OF physmap add-on
6  * This SoC has an elaborate flash control register, so we need to
18 #include "physmap-gemini.h"
21  * The Flash-relevant parts of the global status register
63 	if (IS_ERR(gf->enabled_state))  in gemini_flash_enable_pins()
65 	ret = pinctrl_select_state(gf->p, gf->enabled_state);  in gemini_flash_enable_pins()
67 		dev_err(gf->dev, "failed to enable pins\n");  in gemini_flash_enable_pins()
74 	if (IS_ERR(gf->disabled_state))  in gemini_flash_disable_pins()
76 	ret = pinctrl_select_state(gf->p, gf->disabled_state);  in gemini_flash_disable_pins()
78 		dev_err(gf->dev, "failed to disable pins\n");  in gemini_flash_disable_pins()
125 	struct device *dev = &pdev->dev;  in of_flash_probe_gemini()
130 	if (!of_device_is_compatible(np, "cortina,gemini-flash"))  in of_flash_probe_gemini()
135 		return -ENOMEM;  in of_flash_probe_gemini()
136 	gf->dev = dev;  in of_flash_probe_gemini()
147 		return -ENODEV;  in of_flash_probe_gemini()
152 	 * It would be contradictory if a physmap flash was NOT parallel.  in of_flash_probe_gemini()
155 		dev_err(dev, "flash is not parallel\n");  in of_flash_probe_gemini()
156 		return -ENODEV;  in of_flash_probe_gemini()
163 		if (map->bankwidth != 2)  in of_flash_probe_gemini()
164 			dev_warn(dev, "flash hardware say flash is 16 bit wide but DT says it is %d bits wide\n",  in of_flash_probe_gemini()
165 				 map->bankwidth * 8);  in of_flash_probe_gemini()
167 		if (map->bankwidth != 1)  in of_flash_probe_gemini()
168 			dev_warn(dev, "flash hardware say flash is 8 bit wide but DT says it is %d bits wide\n",  in of_flash_probe_gemini()
169 				 map->bankwidth * 8);  in of_flash_probe_gemini()
172 	gf->p = devm_pinctrl_get(dev);  in of_flash_probe_gemini()
173 	if (IS_ERR(gf->p)) {  in of_flash_probe_gemini()
175 		ret = PTR_ERR(gf->p);  in of_flash_probe_gemini()
179 	gf->enabled_state = pinctrl_lookup_state(gf->p, "enabled");  in of_flash_probe_gemini()
180 	if (IS_ERR(gf->enabled_state))  in of_flash_probe_gemini()
183 	gf->disabled_state = pinctrl_lookup_state(gf->p, "disabled");  in of_flash_probe_gemini()
184 	if (IS_ERR(gf->enabled_state)) {  in of_flash_probe_gemini()
187 		ret = pinctrl_select_state(gf->p, gf->disabled_state);  in of_flash_probe_gemini()
189 			dev_err(gf->dev, "failed to disable pins\n");  in of_flash_probe_gemini()
192 	map->read = gemini_flash_map_read;  in of_flash_probe_gemini()
193 	map->write = gemini_flash_map_write;  in of_flash_probe_gemini()
194 	map->copy_from = gemini_flash_map_copy_from;  in of_flash_probe_gemini()
195 	map->copy_to = gemini_flash_map_copy_to;  in of_flash_probe_gemini()
197 	dev_info(dev, "initialized Gemini-specific physmap control\n");  in of_flash_probe_gemini()