1 // SPDX-License-Identifier: GPL-2.0+
132 	unsigned long gpios;  member
142 static int winbond_sio_enter(unsigned long base)  in winbond_sio_enter()
145 		return -EBUSY;  in winbond_sio_enter()
206  * struct winbond_gpio_port_conflict - possibly conflicting device information
209  *		is located (or WB_SIO_DEV_NONE - don't select any
226  * struct winbond_gpio_info - information about a particular GPIO port (device)
232  * @outputppbit:	index of a push-pull output driver mode bit
351 static bool winbond_gpio_get_info(unsigned int *gpio_num,  in winbond_gpio_get_info()
357 	for_each_set_bit(i, &params.gpios, BITS_PER_LONG) {  in winbond_gpio_get_info()
361 		*gpio_num -= 8;  in winbond_gpio_get_info()
383 static int winbond_gpio_get(struct gpio_chip *gc, unsigned int offset)  in winbond_gpio_get()
388 	int ret;  in winbond_gpio_get()
396 	winbond_sio_select_logical(*base, info->dev);  in winbond_gpio_get()
398 	val = winbond_sio_reg_btest(*base, info->datareg, offset);  in winbond_gpio_get()
399 	if (winbond_sio_reg_btest(*base, info->invreg, offset))  in winbond_gpio_get()
407 static int winbond_gpio_direction_in(struct gpio_chip *gc, unsigned int offset)  in winbond_gpio_direction_in()
411 	int ret;  in winbond_gpio_direction_in()
414 		return -EACCES;  in winbond_gpio_direction_in()
420 	winbond_sio_select_logical(*base, info->dev);  in winbond_gpio_direction_in()
422 	winbond_sio_reg_bset(*base, info->ioreg, offset);  in winbond_gpio_direction_in()
429 static int winbond_gpio_direction_out(struct gpio_chip *gc,  in winbond_gpio_direction_out()
430 				      unsigned int offset,  in winbond_gpio_direction_out()
431 				      int val)  in winbond_gpio_direction_out()
435 	int ret;  in winbond_gpio_direction_out()
438 		return -EACCES;  in winbond_gpio_direction_out()
444 	winbond_sio_select_logical(*base, info->dev);  in winbond_gpio_direction_out()
446 	winbond_sio_reg_bclear(*base, info->ioreg, offset);  in winbond_gpio_direction_out()
448 	if (winbond_sio_reg_btest(*base, info->invreg, offset))  in winbond_gpio_direction_out()
452 		winbond_sio_reg_bset(*base, info->datareg, offset);  in winbond_gpio_direction_out()
454 		winbond_sio_reg_bclear(*base, info->datareg, offset);  in winbond_gpio_direction_out()
461 static void winbond_gpio_set(struct gpio_chip *gc, unsigned int offset,  in winbond_gpio_set()
462 			     int val)  in winbond_gpio_set()
473 	winbond_sio_select_logical(*base, info->dev);  in winbond_gpio_set()
475 	if (winbond_sio_reg_btest(*base, info->invreg, offset))  in winbond_gpio_set()
479 		winbond_sio_reg_bset(*base, info->datareg, offset);  in winbond_gpio_set()
481 		winbond_sio_reg_bclear(*base, info->datareg, offset);  in winbond_gpio_set()
487 	.base			= -1,
499 	unsigned int val;  in winbond_gpio_configure_port0_pins()
522 static bool winbond_gpio_configure_port(unsigned long base, unsigned int idx)  in winbond_gpio_configure_port()
525 	const struct winbond_gpio_port_conflict *conflict = &info->conflict;  in winbond_gpio_configure_port()
528 	if (conflict->name != NULL) {  in winbond_gpio_configure_port()
529 		if (conflict->dev != WB_SIO_DEV_NONE)  in winbond_gpio_configure_port()
530 			winbond_sio_select_logical(base, conflict->dev);  in winbond_gpio_configure_port()
532 		if (winbond_sio_reg_btest(base, conflict->testreg,  in winbond_gpio_configure_port()
533 					  conflict->testbit)) {  in winbond_gpio_configure_port()
534 			if (conflict->warnonly)  in winbond_gpio_configure_port()
536 					idx + 1, conflict->name);  in winbond_gpio_configure_port()
539 					idx + 1, conflict->name);  in winbond_gpio_configure_port()
551 	winbond_sio_select_logical(base, info->dev);  in winbond_gpio_configure_port()
553 	winbond_sio_reg_bset(base, info->enablereg, info->enablebit);  in winbond_gpio_configure_port()
556 		winbond_sio_reg_bset(base, info->outputreg,  in winbond_gpio_configure_port()
557 				     info->outputppbit);  in winbond_gpio_configure_port()
559 		winbond_sio_reg_bclear(base, info->outputreg,  in winbond_gpio_configure_port()
560 				       info->outputppbit);  in winbond_gpio_configure_port()
563 			  winbond_sio_reg_btest(base, info->outputreg,  in winbond_gpio_configure_port()
564 						info->outputppbit) ?  in winbond_gpio_configure_port()
565 			  "push-pull" :  in winbond_gpio_configure_port()
571 static int winbond_gpio_configure(unsigned long base)  in winbond_gpio_configure()
575 	for_each_set_bit(i, &params.gpios, BITS_PER_LONG)  in winbond_gpio_configure()
577 			__clear_bit(i, &params.gpios);  in winbond_gpio_configure()
579 	if (!params.gpios) {  in winbond_gpio_configure()
580 		pr_err("please use 'gpios' module parameter to select some active GPIO ports to enable\n");  in winbond_gpio_configure()
581 		return -EINVAL;  in winbond_gpio_configure()
587 static int winbond_gpio_check_chip(unsigned long base)  in winbond_gpio_check_chip()
589 	int ret;  in winbond_gpio_check_chip()
590 	unsigned int chip;  in winbond_gpio_check_chip()
604 		ret = -ENODEV;  in winbond_gpio_check_chip()
612 static int winbond_gpio_imatch(struct device *dev, unsigned int id)  in winbond_gpio_imatch()
615 	int ret;  in winbond_gpio_imatch()
617 	gpios_rem = params.gpios & ~GENMASK(ARRAY_SIZE(winbond_gpio_infos) - 1,  in winbond_gpio_imatch()
622 		params.gpios &= ~gpios_rem;  in winbond_gpio_imatch()
626 		pr_err("some GPIO ports are set both to push-pull and open drain mode at the same time\n");  in winbond_gpio_imatch()
641 	if (ret != -ENODEV && ret != -EBUSY)  in winbond_gpio_imatch()
648 static int winbond_gpio_iprobe(struct device *dev, unsigned int id)  in winbond_gpio_iprobe()
650 	int ret;  in winbond_gpio_iprobe()
653 		return -EINVAL;  in winbond_gpio_iprobe()
667 	 * Add 8 gpios for every GPIO port that was enabled in gpios  in winbond_gpio_iprobe()
671 	winbond_gpio_chip.ngpio = hweight_long(params.gpios) * 8;  in winbond_gpio_iprobe()
677 	if (params.gpios & BIT(5))  in winbond_gpio_iprobe()
678 		winbond_gpio_chip.ngpio -= (8 - 5);  in winbond_gpio_iprobe()
697 		 "I/O port base (when unset - probe chip default ones)");
700 module_param_named(gpios, params.gpios, ulong, 0444);
701 MODULE_PARM_DESC(gpios,
702 		 "bitmask of GPIO ports to enable (bit 0 - GPIO1, bit 1 - GPIO2, etc.");
706  * It can't be a one bitmask since we need three values per port: push-pull,
707  * open-drain and keep as-is (this is the default).
711 		 "bitmask of GPIO ports to set to push-pull mode (bit 0 - GPIO1, bit 1 - GPIO2, etc.");
715 		 "bitmask of GPIO ports to set to open drain mode (bit 0 - GPIO1, bit 1 - GPIO2, etc.");