diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-sis96x.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-sis96x.c | 37 |
1 files changed, 17 insertions, 20 deletions
diff --git a/drivers/i2c/busses/i2c-sis96x.c b/drivers/i2c/busses/i2c-sis96x.c index dc235bb8e24..f1bba639664 100644 --- a/drivers/i2c/busses/i2c-sis96x.c +++ b/drivers/i2c/busses/i2c-sis96x.c @@ -1,7 +1,4 @@ /* - sis96x.c - Part of lm_sensors, Linux kernel modules for hardware - monitoring - Copyright (c) 2003 Mark M. Hoffman <mhoffman@lightlink.com> This program is free software; you can redistribute it and/or modify @@ -40,6 +37,7 @@ #include <linux/ioport.h> #include <linux/i2c.h> #include <linux/init.h> +#include <linux/acpi.h> #include <asm/io.h> /* base address register in PCI config space */ @@ -111,7 +109,7 @@ static int sis96x_transaction(int size) /* check it again */ if (((temp = sis96x_read(SMB_CNT)) & 0x03) != 0x00) { dev_dbg(&sis96x_adapter.dev, "Failed (0x%02x)\n", temp); - return -1; + return -EBUSY; } else { dev_dbg(&sis96x_adapter.dev, "Successful\n"); } @@ -136,19 +134,19 @@ static int sis96x_transaction(int size) /* If the SMBus is still busy, we give up */ if (timeout >= MAX_TIMEOUT) { dev_dbg(&sis96x_adapter.dev, "SMBus Timeout! (0x%02x)\n", temp); - result = -1; + result = -ETIMEDOUT; } /* device error - probably missing ACK */ if (temp & 0x02) { dev_dbg(&sis96x_adapter.dev, "Failed bus transaction!\n"); - result = -1; + result = -ENXIO; } /* bus collision */ if (temp & 0x04) { dev_dbg(&sis96x_adapter.dev, "Bus collision!\n"); - result = -1; + result = -EIO; } /* Finish up by resetting the bus */ @@ -161,11 +159,12 @@ static int sis96x_transaction(int size) return result; } -/* Return -1 on error. */ +/* Return negative errno on error. */ static s32 sis96x_access(struct i2c_adapter * adap, u16 addr, unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data * data) { + int status; switch (size) { case I2C_SMBUS_QUICK: @@ -200,20 +199,14 @@ static s32 sis96x_access(struct i2c_adapter * adap, u16 addr, SIS96x_PROC_CALL : SIS96x_WORD_DATA); break; - case I2C_SMBUS_BLOCK_DATA: - /* TO DO: */ - dev_info(&adap->dev, "SMBus block not implemented!\n"); - return -1; - break; - default: - dev_info(&adap->dev, "Unsupported I2C size\n"); - return -1; - break; + dev_warn(&adap->dev, "Unsupported transaction %d\n", size); + return -EOPNOTSUPP; } - if (sis96x_transaction(size)) - return -1; + status = sis96x_transaction(size); + if (status) + return status; if ((size != SIS96x_PROC_CALL) && ((read_write == I2C_SMBUS_WRITE) || (size == SIS96x_QUICK))) @@ -249,7 +242,7 @@ static const struct i2c_algorithm smbus_algorithm = { static struct i2c_adapter sis96x_adapter = { .owner = THIS_MODULE, .id = I2C_HW_SMBUS_SIS96X, - .class = I2C_CLASS_HWMON, + .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, .algo = &smbus_algorithm, }; @@ -286,6 +279,10 @@ static int __devinit sis96x_probe(struct pci_dev *dev, dev_info(&dev->dev, "SiS96x SMBus base address: 0x%04x\n", sis96x_smbus_base); + retval = acpi_check_resource_conflict(&dev->resource[SIS96x_BAR]); + if (retval) + return retval; + /* Everything is happy, let's grab the memory and set things up. */ if (!request_region(sis96x_smbus_base, SMB_IOSIZE, sis96x_driver.name)) { |