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i2c: algo: pca: Fix mode selection for PCA9665
The code currently always selects turbo mode for PCA9665, no matter which clock frequency is configured. This is because it compares the clock frequency against constants reflecting (boundary / 100). Compare against real boundary frequencies to fix the problem. Signed-off-by: Thomas Kavanagh <tkavanagh@juniper.net> Signed-off-by: Guenter Roeck <groeck@juniper.net> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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1 changed files with 3 additions and 3 deletions
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@ -476,17 +476,17 @@ static int pca_init(struct i2c_adapter *adap)
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/* To avoid integer overflow, use clock/100 for calculations */
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clock = pca_clock(pca_data) / 100;
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if (pca_data->i2c_clock > 10000) {
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if (pca_data->i2c_clock > 1000000) {
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mode = I2C_PCA_MODE_TURBO;
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min_tlow = 14;
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min_thi = 5;
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raise_fall_time = 22; /* Raise 11e-8s, Fall 11e-8s */
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} else if (pca_data->i2c_clock > 4000) {
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} else if (pca_data->i2c_clock > 400000) {
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mode = I2C_PCA_MODE_FASTP;
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min_tlow = 17;
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min_thi = 9;
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raise_fall_time = 22; /* Raise 11e-8s, Fall 11e-8s */
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} else if (pca_data->i2c_clock > 1000) {
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} else if (pca_data->i2c_clock > 100000) {
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mode = I2C_PCA_MODE_FAST;
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min_tlow = 44;
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min_thi = 20;
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