* [PATCH] ARM: imx: improve status check of clock gate
@ 2013-12-24 19:21 Anson Huang
2013-12-24 8:23 ` Shawn Guo
0 siblings, 1 reply; 2+ messages in thread
From: Anson Huang @ 2013-12-24 19:21 UTC (permalink / raw)
To: shawn.guo, kernel; +Cc: linux-arm-kernel, linux-kernel
For ccm clock gate, both 2b'11 and 2b'01 should be treated
as clock enabled, see below description in CCM, whenver CPU
trys to check clock gate's status, system will be in run mode.
2b'00: clock is off during all modes;
2b'01: clock is on in run mode, but off in wait and stop mode;
2b'10: Not applicable;
2b'11: clock is on during all modes, except stop mode.
Signed-off-by: Anson Huang <b20788@freescale.com>
---
arch/arm/mach-imx/clk-gate2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/clk-gate2.c b/arch/arm/mach-imx/clk-gate2.c
index a63e415..a2ecc00 100644
--- a/arch/arm/mach-imx/clk-gate2.c
+++ b/arch/arm/mach-imx/clk-gate2.c
@@ -72,7 +72,7 @@ static int clk_gate2_is_enabled(struct clk_hw *hw)
reg = readl(gate->reg);
- if (((reg >> gate->bit_idx) & 3) == 3)
+ if (((reg >> gate->bit_idx) & 1) == 1)
return 1;
return 0;
--
1.7.9.5
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] ARM: imx: improve status check of clock gate
2013-12-24 19:21 [PATCH] ARM: imx: improve status check of clock gate Anson Huang
@ 2013-12-24 8:23 ` Shawn Guo
0 siblings, 0 replies; 2+ messages in thread
From: Shawn Guo @ 2013-12-24 8:23 UTC (permalink / raw)
To: Anson Huang; +Cc: kernel, linux-arm-kernel, linux-kernel
On Tue, Dec 24, 2013 at 02:21:27PM -0500, Anson Huang wrote:
> For ccm clock gate, both 2b'11 and 2b'01 should be treated
> as clock enabled, see below description in CCM, whenver CPU
> trys to check clock gate's status, system will be in run mode.
>
> 2b'00: clock is off during all modes;
> 2b'01: clock is on in run mode, but off in wait and stop mode;
> 2b'10: Not applicable;
> 2b'11: clock is on during all modes, except stop mode.
>
> Signed-off-by: Anson Huang <b20788@freescale.com>
Applied, thanks.
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