1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  i2c-pca-isa.c driver for PCA9564 on ISA boards
19 #include <linux/i2c-algo-pca.h>
24 #define DRIVER "i2c-pca-isa"
28 static int irq = -1;
37 static void pca_isa_writebyte(void *pd, int reg, int val)  in pca_isa_writebyte()  argument
40 	static char *names[] = { "T/O", "DAT", "ADR", "CON" };  in pca_isa_writebyte()  local
41 	printk(KERN_DEBUG "*** write %s at %#lx <= %#04x\n", names[reg],  in pca_isa_writebyte()
42 	       base+reg, val);  in pca_isa_writebyte()
44 	outb(val, base+reg);  in pca_isa_writebyte()
47 static int pca_isa_readbyte(void *pd, int reg)  in pca_isa_readbyte()  argument
49 	int res = inb(base+reg);  in pca_isa_readbyte()
52 		static char *names[] = { "STA", "DAT", "ADR", "CON" };  in pca_isa_readbyte()  local
53 		printk(KERN_DEBUG "*** read  %s => %#04x\n", names[reg], res);  in pca_isa_readbyte()
64 	if (irq > -1) {  in pca_isa_waitforcompletion()
114 		if (irq <= -1)  in pca_isa_match()
135 	if (!request_region(base, IO_SIZE, "i2c-pca-isa")) {  in pca_isa_probe()
140 	if (irq > -1) {  in pca_isa_probe()
141 		if (request_irq(irq, pca_handler, 0, "i2c-pca-isa", &pca_isa_ops) < 0) {  in pca_isa_probe()
156 	if (irq > -1)  in pca_isa_probe()
161 	return -ENODEV;  in pca_isa_probe()
168 	if (irq > -1) {  in pca_isa_remove()
197 		"\t\tFor PCA9665:\tStandard: 60300 - 100099\n"
198 		"\t\t\t\tFast: 100100 - 400099\n"
199 		"\t\t\t\tFast+: 400100 - 10000099\n"