[PATCH v2] rtc: sun6i: Fix bit_idx value for clk_register_gate

[PATCH v2] rtc: sun6i: Fix bit_idx value for clk_register_gate

[Jagan Teki]

From: Michael Trimarchi <michael@amarulasolutions.com>

clk-gate core will take bit_idx through clk_register_gate
and then do clk_gate_ops by using BIT(bit_idx), but rtc-sun6i
is passing bit_idx as BIT(bit_idx) it becomes BIT(BIT(bit_idx)
which is wrong and eventually external gate clock is not enabling.

This patch fixed by passing bit index and the original change
introduced from below commit.
"rtc: sun6i: Add support for the external oscillator gate"
(sha1: 	17ecd246414b3a0fe0cb248c86977a8bda465b7b)

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
Changes for v2:
- add suffix _OFFSET with macro name to distinguish b/w
  register actual values vs offset.

 drivers/rtc/rtc-sun6i.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index 2e6fb275acc8..2cd5a7b1a2e3 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -74,7 +74,7 @@
 #define SUN6I_ALARM_CONFIG_WAKEUP		BIT(0)
 
 #define SUN6I_LOSC_OUT_GATING			0x0060
-#define SUN6I_LOSC_OUT_GATING_EN		BIT(0)
+#define SUN6I_LOSC_OUT_GATING_EN_OFFSET		0
 
 /*
  * Get date values
@@ -255,7 +255,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node)
 				      &clkout_name);
 	rtc->ext_losc = clk_register_gate(NULL, clkout_name, rtc->hw.init->name,
 					  0, rtc->base + SUN6I_LOSC_OUT_GATING,
-					  SUN6I_LOSC_OUT_GATING_EN, 0,
+					  SUN6I_LOSC_OUT_GATING_EN_OFFSET, 0,
 					  &rtc->lock);
 	if (IS_ERR(rtc->ext_losc)) {
 		pr_crit("Couldn't register the LOSC external gate\n");
-- 
2.14.3

Re: [PATCH v2] rtc: sun6i: Fix bit_idx value for clk_register_gate

[Maxime Ripard]

On Tue, May 29, 2018 at 09:34:25PM +0530, Jagan Teki wrote:
> From: Michael Trimarchi <michael@amarulasolutions.com>
> 
> clk-gate core will take bit_idx through clk_register_gate
> and then do clk_gate_ops by using BIT(bit_idx), but rtc-sun6i
> is passing bit_idx as BIT(bit_idx) it becomes BIT(BIT(bit_idx)
> which is wrong and eventually external gate clock is not enabling.
> 
> This patch fixed by passing bit index and the original change
> introduced from below commit.
> "rtc: sun6i: Add support for the external oscillator gate"
> (sha1: 	17ecd246414b3a0fe0cb248c86977a8bda465b7b)
> 
> Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

I said it in the v1 already, but this should be sent to stable and
have a fixes tag.

Maxime

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com