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i2c: at91: make use of the new infrastructure for quirks
Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Tested-By: Ludovic Desroches <ludovic.desroches@atmel.com>
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@ -487,30 +487,10 @@ static int at91_twi_xfer(struct i2c_adapter *adap, struct i2c_msg *msg, int num)
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if (ret < 0)
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goto out;
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/*
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* The hardware can handle at most two messages concatenated by a
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* repeated start via it's internal address feature.
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*/
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if (num > 2) {
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dev_err(dev->dev,
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"cannot handle more than two concatenated messages.\n");
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ret = 0;
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goto out;
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} else if (num == 2) {
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if (num == 2) {
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int internal_address = 0;
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int i;
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if (msg->flags & I2C_M_RD) {
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dev_err(dev->dev, "first transfer must be write.\n");
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ret = -EINVAL;
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goto out;
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}
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if (msg->len > 3) {
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dev_err(dev->dev, "first message size must be <= 3.\n");
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ret = -EINVAL;
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goto out;
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}
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/* 1st msg is put into the internal address, start with 2nd */
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m_start = &msg[1];
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for (i = 0; i < msg->len; ++i) {
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@ -540,6 +520,15 @@ out:
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return ret;
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}
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/*
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* The hardware can handle at most two messages concatenated by a
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* repeated start via it's internal address feature.
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*/
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static struct i2c_adapter_quirks at91_twi_quirks = {
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.flags = I2C_AQ_COMB | I2C_AQ_COMB_WRITE_FIRST | I2C_AQ_COMB_SAME_ADDR,
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.max_comb_1st_msg_len = 3,
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};
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static u32 at91_twi_func(struct i2c_adapter *adapter)
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{
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return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL
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@ -777,6 +766,7 @@ static int at91_twi_probe(struct platform_device *pdev)
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dev->adapter.owner = THIS_MODULE;
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dev->adapter.class = I2C_CLASS_DEPRECATED;
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dev->adapter.algo = &at91_twi_algorithm;
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dev->adapter.quirks = &at91_twi_quirks;
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dev->adapter.dev.parent = dev->dev;
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dev->adapter.nr = pdev->id;
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dev->adapter.timeout = AT91_I2C_TIMEOUT;
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