linux-kernel - [PATCH v2 1/2] clk: aspeed: Fix is

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Date:   Thu,  8 Mar 2018 14:57:19 -0600
From:   Eddie James <eajames@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-clk@...r.kernel.org, joel@....id.au, mturquette@...libre.com,
        sboyd@...nel.org, eajames@...ux.vnet.ibm.com, mine260309@...il.com,
        ryan_chen@...eedtech.com
Subject: [PATCH v2 1/2] clk: aspeed: Fix is_enabled for certain clocks

Some of the Aspeed clocks are disabled by setting the relevant bit in
the "clock stop control" register to one, while others are disabled by
setting their bit to zero. The driver already uses a flag per gate  to
identify this behavior, but doesn't apply it in the clock is_enabled
function.

Use the existing gate flag to correctly return whether or not a clock
is enabled in the aspeed_clk_is_enabled function.

Signed-off-by: Eddie James <eajames@...ux.vnet.ibm.com>
---
 drivers/clk/clk-aspeed.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/clk-aspeed.c b/drivers/clk/clk-aspeed.c
index 9f7f931..1687771 100644
--- a/drivers/clk/clk-aspeed.c
+++ b/drivers/clk/clk-aspeed.c
@@ -259,11 +259,12 @@ static int aspeed_clk_is_enabled(struct clk_hw *hw)
 {
 	struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw);
 	u32 clk = BIT(gate->clock_idx);
+	u32 enval = (gate->flags & CLK_GATE_SET_TO_DISABLE) ? 0 : clk;
 	u32 reg;
 
 	regmap_read(gate->map, ASPEED_CLK_STOP_CTRL, &reg);
 
-	return (reg & clk) ? 0 : 1;
+	return ((reg & clk) == enval) ? 1 : 0;
 }
 
 static const struct clk_ops aspeed_clk_gate_ops = {
-- 
1.8.3.1