drivers/rtc/rtc-hym8563.c: fix swapped enable/disable of clockout control bit

The hym8563 datasheet describes the clock output control-bit as "when set
to logic 0, the square wave output is enable, when set to logic 1, the
CLKOUT output is inhibited".  But in reality the setting is exactly
opposite.

Before now, the clock output was not really used, but on the rk3288 soc
this generated clock is used to supply the temperature sensor block and
the swapped bit value prevented it from working.  With the corrected
value, the tsadc now reports correct values.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index d4a65619ef14347ca57aca37db62bd52545920f8..0f710e98538fb967d615d303a356aaad72d20ba0 100644 (file)
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -66,7 +66,7 @@
 #define HYM8563_ALM_BIT_DISABLE        BIT(7)
 
 #define HYM8563_CLKOUT         0x0d
-#define HYM8563_CLKOUT_DISABLE BIT(7)
+#define HYM8563_CLKOUT_ENABLE  BIT(7)
 #define HYM8563_CLKOUT_32768   0
 #define HYM8563_CLKOUT_1024    1
 #define HYM8563_CLKOUT_32      2
@@ -360,9 +360,9 @@ static int hym8563_clkout_control(struct clk_hw *hw, bool enable)
                return ret;
 
        if (enable)
-               ret &= ~HYM8563_CLKOUT_DISABLE;
+               ret |= HYM8563_CLKOUT_ENABLE;
        else
-               ret |= HYM8563_CLKOUT_DISABLE;
+               ret &= ~HYM8563_CLKOUT_ENABLE;
 
        return i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, ret);
 }
@@ -386,7 +386,7 @@ static int hym8563_clkout_is_prepared(struct clk_hw *hw)
        if (ret < 0)
                return ret;
 
-       return !(ret & HYM8563_CLKOUT_DISABLE);
+       return !!(ret & HYM8563_CLKOUT_ENABLE);
 }
 
 static const struct clk_ops hym8563_clkout_ops = {
@@ -407,7 +407,7 @@ static struct clk *hym8563_clkout_register_clk(struct hym8563 *hym8563)
        int ret;
 
        ret = i2c_smbus_write_byte_data(client, HYM8563_CLKOUT,
-                                               HYM8563_CLKOUT_DISABLE);
+                                               0);
        if (ret < 0)
                return ERR_PTR(ret);