From 5f71a3ef3753ac2068009637eee619e163f44b30 Mon Sep 17 00:00:00 2001 From: Thomas Kavanagh Date: Thu, 13 Sep 2012 08:16:55 -0700 Subject: [PATCH] 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 Signed-off-by: Guenter Roeck Signed-off-by: Wolfram Sang --- drivers/i2c/algos/i2c-algo-pca.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/algos/i2c-algo-pca.c b/drivers/i2c/algos/i2c-algo-pca.c index 73133b1063f0..6f5f98d69af7 100644 --- a/drivers/i2c/algos/i2c-algo-pca.c +++ b/drivers/i2c/algos/i2c-algo-pca.c @@ -476,17 +476,17 @@ static int pca_init(struct i2c_adapter *adap) /* To avoid integer overflow, use clock/100 for calculations */ clock = pca_clock(pca_data) / 100; - if (pca_data->i2c_clock > 10000) { + if (pca_data->i2c_clock > 1000000) { mode = I2C_PCA_MODE_TURBO; min_tlow = 14; min_thi = 5; raise_fall_time = 22; /* Raise 11e-8s, Fall 11e-8s */ - } else if (pca_data->i2c_clock > 4000) { + } else if (pca_data->i2c_clock > 400000) { mode = I2C_PCA_MODE_FASTP; min_tlow = 17; min_thi = 9; raise_fall_time = 22; /* Raise 11e-8s, Fall 11e-8s */ - } else if (pca_data->i2c_clock > 1000) { + } else if (pca_data->i2c_clock > 100000) { mode = I2C_PCA_MODE_FAST; min_tlow = 44; min_thi = 20; -- GitLab