Thread (24 messages) 24 messages, 3 authors, 2015-07-22

Re: [PATCH 1/9] drivers: clk: st: Incorrect clocks status

From: Gabriel Fernandez <hidden>
Date: 2015-07-06 08:11:48
Also in: linux-arm-kernel, linux-clk, lkml

Hi Stephen,

Can you drop also this patch because it's concerns an old platform and
there no values to make more changes.

BR
Gabriel.

On 25 June 2015 at 10:41, Gabriel Fernandez
[off-list ref] wrote:
Hi Stephen,

Thanks for reviewing


On 24 June 2015 at 22:02, Stephen Boyd [off-list ref] wrote:
quoted
On 06/23/2015 07:09 AM, Gabriel Fernandez wrote:
quoted
In the clk_summary output, the h/w status of DivMux is incorrect
(Parent and Enable status), since the clk_mux_ops.get_parent()
returns -ERRCODE when clock is OFF.

Signed-off-by: Pankaj Dev <redacted>
Signed-off-by: Gabriel Fernandez <redacted>
---
 drivers/clk/st/clkgen-mux.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/clk/st/clkgen-mux.c b/drivers/clk/st/clkgen-mux.c
index 4fbe6e0..c94b56b 100644
--- a/drivers/clk/st/clkgen-mux.c
+++ b/drivers/clk/st/clkgen-mux.c
@@ -128,7 +128,7 @@ static int clkgena_divmux_is_enabled(struct clk_hw *hw)

      __clk_hw_set_clk(mux_hw, hw);

-     return (s8)clk_mux_ops.get_parent(mux_hw) > 0;
+     return ((s8)clk_mux_ops.get_parent(mux_hw) >= 0);
Useless parentheses around it all, please drop.
Ok
quoted
quoted
 }

 static u8 clkgena_divmux_get_parent(struct clk_hw *hw)
@@ -138,11 +138,13 @@ static u8 clkgena_divmux_get_parent(struct clk_hw *hw)

      __clk_hw_set_clk(mux_hw, hw);

-     genamux->muxsel = clk_mux_ops.get_parent(mux_hw);
-     if ((s8)genamux->muxsel < 0) {
-             pr_debug("%s: %s: Invalid parent, setting to default.\n",
-                   __func__, __clk_get_name(hw->clk));
-             genamux->muxsel = 0;
+     if (genamux->muxsel == CKGAX_CLKOPSRC_SWITCH_OFF) {
+             genamux->muxsel = clk_mux_ops.get_parent(mux_hw);
Hm.. maybe we should fix clk_mux_ops to return 0 if it can't find the
parent? Or when this clock is registered we should read the hardware and
set a default parent so that we can't get an error code here.
I 'll try the second solution.

Best regards

Gabriel
quoted
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help