1 // SPDX-License-Identifier: GPL-2.0-only
3  *  linux/arch/arm/mach-pxa/mfp-pxa2xx.c
7  *  The GPIOs on PXA2xx can be configured as one of many alternate
13 #include <linux/gpio-pxa.h>
21 #include "pxa2xx-regs.h"
22 #include "mfp-pxa2xx.h"
23 #include "mfp-pxa27x.h"
32 #define BANK_OFF(n)	(((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2))
64 		return -EINVAL;  in __mfp_config_gpio()
66 	/* alternate function and direction at run-time */  in __mfp_config_gpio()
110 		return -EINVAL;  in __mfp_config_gpio()
115 		return -EINVAL;  in __mfp_config_gpio()
127 		return -1;  in __mfp_validate()
154 void pxa2xx_mfp_set_lpm(int mfp, unsigned long lpm)  in pxa2xx_mfp_set_lpm()  argument
166 	c = (c & ~MFP_LPM_STATE_MASK) | lpm;  in pxa2xx_mfp_set_lpm()
178 		return -EINVAL;  in gpio_set_wake()
181 	c = d->config;  in gpio_set_wake()
183 	if (!d->valid)  in gpio_set_wake()
184 		return -EINVAL;  in gpio_set_wake()
186 	/* Allow keypad GPIOs to wakeup system when  in gpio_set_wake()
187 	 * configured as generic GPIOs.  in gpio_set_wake()
189 	if (d->keypad_gpio && (MFP_AF(d->config) == 0) &&  in gpio_set_wake()
190 	    (d->config & MFP_LPM_CAN_WAKEUP)) {  in gpio_set_wake()
192 			PKWR |= d->mask;  in gpio_set_wake()
194 			PKWR &= ~d->mask;  in gpio_set_wake()
198 	mux_taken = (PWER & d->mux_mask) & (~d->mask);  in gpio_set_wake()
200 		return -EBUSY;  in gpio_set_wake()
202 	if (d->can_wakeup && (c & MFP_LPM_CAN_WAKEUP)) {  in gpio_set_wake()
204 			PWER = (PWER & ~d->mux_mask) | d->mask;  in gpio_set_wake()
207 				PRER |= d->mask;  in gpio_set_wake()
209 				PRER &= ~d->mask;  in gpio_set_wake()
212 				PFER |= d->mask;  in gpio_set_wake()
214 				PFER &= ~d->mask;  in gpio_set_wake()
216 			PWER &= ~d->mask;  in gpio_set_wake()
217 			PRER &= ~d->mask;  in gpio_set_wake()
218 			PFER &= ~d->mask;  in gpio_set_wake()
239 	/* PXA26x has additional 4 GPIOs (86/87/88/89) which has the  in pxa25x_mfp_init()
266 		if (MFP_AF(d->config) == 0)  in keypad_set_wake()
269 		if (d->config & MFP_LPM_CAN_WAKEUP)  in keypad_set_wake()
311 	/* Keypad GPIOs */  in pxa27x_mfp_init()