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>

diff --git a/drivers/i2c/algos/i2c-algo-pca.c b/drivers/i2c/algos/i2c-algo-pca.c
index 73133b1063f012416d2a957f3fc2432ace395439..6f5f98d69af7c26b2fd7b895106e11745ce7d155 100644 (file)
--- 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;