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Commit b64fd291 authored by Andre Haupt's avatar Andre Haupt Committed by Linus Torvalds
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pc8736x_gpio: add support for PC87365 chips 



This is only compile tested, because I do not own appropriate hardware.

Signed-off-by: default avatarAndre Haupt <andre@bitwigglers.org>
Cc: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b231cca4

drivers/char/pc8736x_gpio.c

+8 −3
Original line number Diff line number Diff line
@@ -41,7 +41,8 @@ static u8 pc8736x_gpio_shadow[4]; 
#define SIO_BASE2       0x4E	/* alt command-reg to check */



#define SIO_SID		0x20	/* SuperI/O ID Register */

#define SIO_SID_VALUE	0xe9	/* Expected value in SuperI/O ID Register */

#define SIO_SID_PC87365	0xe5	/* Expected value in ID Register for PC87365 */

#define SIO_SID_PC87366	0xe9	/* Expected value in ID Register for PC87366 */



#define SIO_CF1		0x21	/* chip config, bit0 is chip enable */
@@ -91,13 +92,17 @@ static inline int superio_inb(int addr) 


static int pc8736x_superio_present(void)

{

	int id;



	/* try the 2 possible values, read a hardware reg to verify */

	superio_cmd = SIO_BASE1;

	if (superio_inb(SIO_SID) == SIO_SID_VALUE)

	id = superio_inb(SIO_SID);

	if (id == SIO_SID_PC87365 || id == SIO_SID_PC87366)

		return superio_cmd;



	superio_cmd = SIO_BASE2;

	if (superio_inb(SIO_SID) == SIO_SID_VALUE)

	id = superio_inb(SIO_SID);

	if (id == SIO_SID_PC87365 || id == SIO_SID_PC87366)

		return superio_cmd;



	return 0;