[PATCH 1/1] dt-bindings: clock: Add new OST support for the upcoming new driver.

From: "周琰杰 (Zhou Yanjie)" <zhouyanjie@wanyeetech.com>
To: robh+dt@kernel.org
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	sernia.zhou@foxmail.com
Subject: [PATCH 1/1] dt-bindings: clock: Add new OST support for the upcoming new driver.
Date: Thu,  8 Oct 2020 02:14:07 +0800	[thread overview]
Message-ID: <20201007181407.46889-2-zhouyanjie@wanyeetech.com> (raw)
In-Reply-To: <20201007181407.46889-1-zhouyanjie@wanyeetech.com>

The new OST has one global timer and two or four percpu timers, so there will be three
combinations in the upcoming new OST driver: the original GLOBAL_TIMER + PERCPU_TIMER,
the new GLOBAL_TIMER + PERCPU_TIMER0/1 and GLOBAL_TIMER + PERCPU_TIMER0/1/2/3, For this,
add the macro definition about OST_CLK_PERCPU_TIMER0/1/2/3. And in order to ensure that
all the combinations work normally, the original ABI values of OST_CLK_PERCPU_TIMER and
OST_CLK_GLOBAL_TIMER need to be exchanged to ensure that in any combinations, the clock
can be registered (by calling clk_hw_register()) from index 0.

I'm sure that exchanging the ABI values of OST_CLK_PERCPU_TIMER and OST_CLK_GLOBAL_TIMER
will not affect the existing related drivers and the SoCs whitch using these drivers, so
we should be able to exchange them safely.

Tested-by: 周正 (Zhou Zheng) <sernia.zhou@foxmail.com>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
---
 include/dt-bindings/clock/ingenic,sysost.h | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/include/dt-bindings/clock/ingenic,sysost.h b/include/dt-bindings/clock/ingenic,sysost.h
index 9ac88e90babf..063791b01ab3 100644
--- a/include/dt-bindings/clock/ingenic,sysost.h
+++ b/include/dt-bindings/clock/ingenic,sysost.h
@@ -1,12 +1,16 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * This header provides clock numbers for the ingenic,tcu DT binding.
+ * This header provides clock numbers for the Ingenic OST DT binding.
  */
 
 #ifndef __DT_BINDINGS_CLOCK_INGENIC_OST_H__
 #define __DT_BINDINGS_CLOCK_INGENIC_OST_H__
 
-#define OST_CLK_PERCPU_TIMER	0
-#define OST_CLK_GLOBAL_TIMER	1
+#define OST_CLK_PERCPU_TIMER	1
+#define OST_CLK_GLOBAL_TIMER	0
+#define OST_CLK_PERCPU_TIMER0	1
+#define OST_CLK_PERCPU_TIMER1	2
+#define OST_CLK_PERCPU_TIMER2	3
+#define OST_CLK_PERCPU_TIMER3	4
 
 #endif /* __DT_BINDINGS_CLOCK_INGENIC_OST_H__ */
-- 
2.11.0

