i2c: davinci: Avoid zero value of CLKH

If CLKH is set to 0 I2C clock is not generated at all, so avoid this value
and stretch the clock in this case.

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c
index 75d6ab177055..7379043711df 100644
--- a/drivers/i2c/busses/i2c-davinci.c
+++ b/drivers/i2c/busses/i2c-davinci.c
@@ -237,12 +237,16 @@ static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev)
         /*
          * It's not always possible to have 1 to 2 ratio when d=7, so fall back
          * to minimal possible clkh in this case.
+         *
+         * Note:
+         * CLKH is not allowed to be 0, in this case I2C clock is not generated
+         * at all
          */
-        if (clk >= clkl + d) {
+        if (clk > clkl + d) {
                 clkh = clk - clkl - d;
                 clkl -= d;
         } else {
-                clkh = 0;
+                clkh = 1;
                 clkl = clk - (d << 1);
         }