aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/char/pc8736x_gpio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char/pc8736x_gpio.c')
-rw-r--r--drivers/char/pc8736x_gpio.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/char/pc8736x_gpio.c b/drivers/char/pc8736x_gpio.c
index b930de50407a..3f7da8cf3a80 100644
--- a/drivers/char/pc8736x_gpio.c
+++ b/drivers/char/pc8736x_gpio.c
@@ -41,7 +41,8 @@ static u8 pc8736x_gpio_shadow[4];
41#define SIO_BASE2 0x4E /* alt command-reg to check */ 41#define SIO_BASE2 0x4E /* alt command-reg to check */
42 42
43#define SIO_SID 0x20 /* SuperI/O ID Register */ 43#define SIO_SID 0x20 /* SuperI/O ID Register */
44#define SIO_SID_VALUE 0xe9 /* Expected value in SuperI/O ID Register */ 44#define SIO_SID_PC87365 0xe5 /* Expected value in ID Register for PC87365 */
45#define SIO_SID_PC87366 0xe9 /* Expected value in ID Register for PC87366 */
45 46
46#define SIO_CF1 0x21 /* chip config, bit0 is chip enable */ 47#define SIO_CF1 0x21 /* chip config, bit0 is chip enable */
47 48
@@ -91,13 +92,17 @@ static inline int superio_inb(int addr)
91 92
92static int pc8736x_superio_present(void) 93static int pc8736x_superio_present(void)
93{ 94{
95 int id;
96
94 /* try the 2 possible values, read a hardware reg to verify */ 97 /* try the 2 possible values, read a hardware reg to verify */
95 superio_cmd = SIO_BASE1; 98 superio_cmd = SIO_BASE1;
96 if (superio_inb(SIO_SID) == SIO_SID_VALUE) 99 id = superio_inb(SIO_SID);
100 if (id == SIO_SID_PC87365 || id == SIO_SID_PC87366)
97 return superio_cmd; 101 return superio_cmd;
98 102
99 superio_cmd = SIO_BASE2; 103 superio_cmd = SIO_BASE2;
100 if (superio_inb(SIO_SID) == SIO_SID_VALUE) 104 id = superio_inb(SIO_SID);
105 if (id == SIO_SID_PC87365 || id == SIO_SID_PC87366)
101 return superio_cmd; 106 return superio_cmd;
102 107
103 return 0; 108 return 0;