Thread (37 messages) 37 messages, 4 authors, 2018-01-23

[PATCH v2 10/16] pwm: Add PWM modes

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From: Claudiu Beznea <hidden>
Date: 2018-01-22 08:54:17
Also in: linux-amlogic, linux-devicetree, linux-pwm, linux-rockchip, lkml


On 20.01.2018 00:34, Rob Herring wrote:
On Fri, Jan 12, 2018 at 04:22:57PM +0200, Claudiu Beznea wrote:
quoted
Define a macros for PWM modes to be used by device tree sources.

Signed-off-by: Claudiu Beznea <redacted>
---
 include/dt-bindings/pwm/pwm.h | 3 +++
 1 file changed, 3 insertions(+)
diff --git a/include/dt-bindings/pwm/pwm.h b/include/dt-bindings/pwm/pwm.h
index ab9a077e3c7d..b8617431f8ec 100644
--- a/include/dt-bindings/pwm/pwm.h
+++ b/include/dt-bindings/pwm/pwm.h
@@ -12,4 +12,7 @@
 
 #define PWM_POLARITY_INVERTED			(1 << 0)
 
+#define PWM_DTMODE_NORMAL			(1 << 0)
Bit 0 is already taken. I think you mean (0 << 1)?
I wanted to have the PWM modes in a new cell, so that the pwms binding to be
something like:
pwms=<pwm-controller pwm-channel pwm-period pwm-flags pwm-mode>

If you think it is mode feasible to also include PWM mode in the cell for 
PWM flags, please let me know.
Personally, I'd just drop this define. A define for a 0 value makes more 
sense when each state is equally used (like active high or low), but if 
0 is the more common case, then I don't the need for a define.
I want it to have these defines like bit defines:
PWM_DTMODE_NORMAL=0x1
PWM_DTMODE_COMPLEMENTARY=0x2
PWM_DTMODE_PUSH_PULL=0x4

Thank you,
Claudiu Beznea
quoted
+#define PWM_DTMODE_COMPLEMENTARY		(1 << 1)
+
 #endif
-- 
2.7.4
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