linux-kernel - [PATCH v3] rtc: sun6i: Fix bit_idx value for clk_register

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Date:   Tue, 29 May 2018 23:09:13 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     stable@...r.kernel.org, linux-rtc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com,
        Jagan Teki <jagan@...rulasolutions.com>
Subject: [PATCH v3] rtc: sun6i: Fix bit_idx value for clk_register_gate

From: Michael Trimarchi <michael@...rulasolutions.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)

Fixes: 17ecd246414b ("rtc: sun6i: Add support for the external oscillator
gate")
Signed-off-by: Michael Trimarchi <michael@...rulasolutions.com>
Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
---
Changes for v3:
- add fixes tag
- Cced stable ML
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