Change in flashrom[master]: sysfsgpio.c implement spi interface via linux sysfs

[Xiang Wang (Code Review)]

Attention is currently required from: Stefan Reinauer, Edward O'Callaghan, Angel Pons.
Xiang Wang has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/49254 )

Change subject: sysfsgpio.c implement spi interface via linux sysfs
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Patch Set 4:

(1 comment)

File sysfsgpio.c:

https://review.coreboot.org/c/flashrom/+/49254/comment/f4c6918e_20f7424a 
PS1, Line 209: 	/* parameter format: pins=cs_pin:sck_pin:mosi_pin:miso_pin */
             : 	char *pins = extract_programmer_param("pins");
             : 	int pins_inited = 0;
             : 	do {
             : 		struct pin_desc *pins_tab[] = {
             : 			&pin_cs, &pin_sck, &pin_mosi, &pin_miso
             : 		};
             : 		if (!(pins && strlen(pins)))
             : 			break;
             : 		char *token = strtok(pins, ":");
             : 		for (unsigned i = 0; i < ARRAY_SIZE(pins_tab); i++) {
             : 			long v;
             : 			if (!token)
             : 				break;
             : 			if (atoi_s(token, 1, &v))
             : 				break;
             : 			pins_tab[i]->pin = v;
             : 			if (export_sysfsgpio(pins_tab[i]))
             : 				break;
             : 			token = strtok(NULL, ":");
             : 			pins_inited = (i + 1 == ARRAY_SIZE(pins_tab));
             : 		}
             : 	} while (0);
             : 	if (pins)
             : 		free(pins);
             : 	if (!pins_inited)
             : 		return 1;
> It looks much better now but I think we can make one more step forwards to keeping more of the funct […]

Done