1 // SPDX-License-Identifier: GPL-2.0-only
3  *  linux/arch/arm/mach-pxa/mfp-pxa2xx.c
10  *  wakeup detection are also supported by the same framework.
13 #include <linux/gpio-pxa.h>
20 #include <mach/pxa2xx-regs.h>
21 #include "mfp-pxa2xx.h"
30 #define BANK_OFF(n)	(((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2))
45 	unsigned long	config;  member
62 		return -EINVAL;  in __mfp_config_gpio()
64 	/* alternate function and direction at run-time */  in __mfp_config_gpio()
104 	 * configurations of those pins not able to wakeup  in __mfp_config_gpio()
107 		pr_warn("%s: GPIO%d unable to wakeup\n", __func__, gpio);  in __mfp_config_gpio()
108 		return -EINVAL;  in __mfp_config_gpio()
112 		pr_warn("%s: output GPIO%d unable to wakeup\n", __func__, gpio);  in __mfp_config_gpio()
113 		return -EINVAL;  in __mfp_config_gpio()
125 		return -1;  in __mfp_validate()
145 		gpio_desc[gpio].config = *c;  in pxa2xx_mfp_config()
163 	c = gpio_desc[gpio].config;  in pxa2xx_mfp_set_lpm()
176 		return -EINVAL;  in gpio_set_wake()
179 	c = d->config;  in gpio_set_wake()
181 	if (!d->valid)  in gpio_set_wake()
182 		return -EINVAL;  in gpio_set_wake()
184 	/* Allow keypad GPIOs to wakeup system when  in gpio_set_wake()
187 	if (d->keypad_gpio && (MFP_AF(d->config) == 0) &&  in gpio_set_wake()
188 	    (d->config & MFP_LPM_CAN_WAKEUP)) {  in gpio_set_wake()
190 			PKWR |= d->mask;  in gpio_set_wake()
192 			PKWR &= ~d->mask;  in gpio_set_wake()
196 	mux_taken = (PWER & d->mux_mask) & (~d->mask);  in gpio_set_wake()
198 		return -EBUSY;  in gpio_set_wake()
200 	if (d->can_wakeup && (c & MFP_LPM_CAN_WAKEUP)) {  in gpio_set_wake()
202 			PWER = (PWER & ~d->mux_mask) | d->mask;  in gpio_set_wake()
205 				PRER |= d->mask;  in gpio_set_wake()
207 				PRER &= ~d->mask;  in gpio_set_wake()
210 				PFER |= d->mask;  in gpio_set_wake()
212 				PFER &= ~d->mask;  in gpio_set_wake()
214 			PWER &= ~d->mask;  in gpio_set_wake()
215 			PRER &= ~d->mask;  in gpio_set_wake()
216 			PFER &= ~d->mask;  in gpio_set_wake()
268 		if (MFP_AF(d->config) == 0)  in keypad_set_wake()
271 		if (d->config & MFP_LPM_CAN_WAKEUP)  in keypad_set_wake()
321 	/* Overwrite GPIO13 as a PWER wakeup source */  in pxa27x_mfp_init()
357 		if ((gpio_desc[i].config & MFP_LPM_KEEP_OUTPUT) &&  in pxa2xx_mfp_suspend()
380 		    ((gpio_desc[i].config & MFP_LPM_KEEP_OUTPUT) &&  in pxa2xx_mfp_suspend()