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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
i2c-stub: Expose the default functionality flags
It is easier to adjust the flags when you know their default value.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Mark M. Hoffman <mhoffman@lightlink.com>
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drivers/i2c/busses/i2c-stub.c
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drivers/i2c/busses/i2c-stub.c
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#include <linux/i2c.h>
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#define MAX_CHIPS 10
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#define STUB_FUNC (I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | \
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I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | \
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I2C_FUNC_SMBUS_I2C_BLOCK)
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static unsigned short chip_addr[MAX_CHIPS];
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module_param_array(chip_addr, ushort, NULL, S_IRUGO);
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MODULE_PARM_DESC(chip_addr,
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"Chip addresses (up to 10, between 0x03 and 0x77)");
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static unsigned long functionality = ~0UL;
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static unsigned long functionality = STUB_FUNC;
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module_param(functionality, ulong, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(functionality, "Override functionality bitfield");
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···
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static u32 stub_func(struct i2c_adapter *adapter)
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{
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return (I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
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I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
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I2C_FUNC_SMBUS_I2C_BLOCK) & functionality;
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return STUB_FUNC & functionality;
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}
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static const struct i2c_algorithm smbus_algorithm = {