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| author | Hans de Goede <hdegoede@redhat.com> | 2011-05-25 20:43:33 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2011-05-25 20:43:33 +0200 |
| commit | 709046a62293a14fda3986a52818ec01fc11bf75 (patch) | |
| tree | f44bd68aa4202978d4e9406e9639de621bb1c967 /drivers/hwmon | |
| parent | 949a9d70020defd7c241607ab3ed037ea88f551c (diff) | |
| download | lwn-709046a62293a14fda3986a52818ec01fc11bf75.tar.gz lwn-709046a62293a14fda3986a52818ec01fc11bf75.zip | |
hwmon: (sch5627) Add sch5627_send_cmd function
This patch generalizes sch5627_read_virtual_reg so that it can
be used to write virtual regs too.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Sigend-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/sch5627.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c index 9a51dcca9b0d..d785a2c5431f 100644 --- a/drivers/hwmon/sch5627.c +++ b/drivers/hwmon/sch5627.c @@ -52,6 +52,9 @@ #define SCH5627_COMPANY_ID 0x5c #define SCH5627_PRIMARY_ID 0xa0 +#define SCH5627_CMD_READ 0x02 +#define SCH5627_CMD_WRITE 0x03 + #define SCH5627_REG_BUILD_CODE 0x39 #define SCH5627_REG_BUILD_ID 0x3a #define SCH5627_REG_HWMON_ID 0x3c @@ -140,7 +143,7 @@ static inline void superio_exit(int base) release_region(base, 2); } -static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg) +static int sch5627_send_cmd(struct sch5627_data *data, u8 cmd, u16 reg, u8 v) { u8 val; int i; @@ -163,10 +166,14 @@ static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg) outb(0x80, data->addr + 3); /* Write Request Packet Header */ - outb(0x02, data->addr + 4); /* Access Type: VREG read */ + outb(cmd, data->addr + 4); /* VREG Access Type read:0x02 write:0x03 */ outb(0x01, data->addr + 5); /* # of Entries: 1 Byte (8-bit) */ outb(0x04, data->addr + 2); /* Mailbox AP to first data entry loc. */ + /* Write Value field */ + if (cmd == SCH5627_CMD_WRITE) + outb(v, data->addr + 4); + /* Write Address field */ outb(reg & 0xff, data->addr + 6); outb(reg >> 8, data->addr + 7); @@ -224,8 +231,16 @@ static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg) * But if we do that things don't work, so let's not. */ - /* Read Data from Mailbox */ - return inb(data->addr + 4); + /* Read Value field */ + if (cmd == SCH5627_CMD_READ) + return inb(data->addr + 4); + + return 0; +} + +static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg) +{ + return sch5627_send_cmd(data, SCH5627_CMD_READ, reg, 0); } static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg) |