linux-kernel - [PATCH 1/2] clk: qcom: smd-rpm: Add a way to define bus clocks with rate and flags

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Message-Id: <20230731-topic-pcnoc-v1-1-452dd36d11d7@linaro.org>
Date:   Mon, 31 Jul 2023 14:20:12 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH 1/2] clk: qcom: smd-rpm: Add a way to define bus clocks
 with rate and flags

Some clocks, at least PCNoC (a.k.a CNoC_PERIPH) need to be always on,
at least on the ACTIVE side, regardless of whether they're used for bus
scaling or not.

Introduce a new macro to preset non-INT_MAX rates and clk flags to make
it easy and work implicitly through the CCF.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 drivers/clk/qcom/clk-smd-rpm.c | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/drivers/clk/qcom/clk-smd-rpm.c b/drivers/clk/qcom/clk-smd-rpm.c
index 9b5411932594..ebb8d9aac89d 100644
--- a/drivers/clk/qcom/clk-smd-rpm.c
+++ b/drivers/clk/qcom/clk-smd-rpm.c
@@ -18,7 +18,7 @@
 #include <dt-bindings/clock/qcom,rpmcc.h>
 
 #define __DEFINE_CLK_SMD_RPM_PREFIX(_prefix, _name, _active,		      \
-				    type, r_id, key)			      \
+				    type, r_id, key, ao_rate, ao_flags)			      \
 	static struct clk_smd_rpm clk_smd_rpm_##_prefix##_active;	      \
 	static struct clk_smd_rpm clk_smd_rpm_##_prefix##_name = {	      \
 		.rpm_res_type = (type),					      \
@@ -42,7 +42,7 @@
 		.active_only = true,					      \
 		.rpm_key = (key),					      \
 		.peer = &clk_smd_rpm_##_prefix##_name,			      \
-		.rate = INT_MAX,					      \
+		.rate = (ao_rate),					      \
 		.hw.init = &(struct clk_init_data){			      \
 			.ops = &clk_smd_rpm_ops,			      \
 			.name = #_active,				      \
@@ -51,12 +51,14 @@
 					.name = "xo_board",		      \
 			},						      \
 			.num_parents = 1,				      \
+			.flags = (ao_flags),				      \
 		},							      \
 	}
 
-#define __DEFINE_CLK_SMD_RPM(_name, _active, type, r_id, key)		      \
+#define __DEFINE_CLK_SMD_RPM(_name, _active, type, r_id, key,\
+			     ao_rate, ao_flags)				      \
 	__DEFINE_CLK_SMD_RPM_PREFIX(/* empty */, _name, _active,	      \
-				    type, r_id, key)
+				    type, r_id, key, ao_rate, ao_flags)
 
 #define __DEFINE_CLK_SMD_RPM_BRANCH_PREFIX(_prefix, _name, _active,\
 					   type, r_id, r, key, ao_flags)      \
@@ -104,17 +106,22 @@
 
 #define DEFINE_CLK_SMD_RPM(_name, type, r_id)				      \
 		__DEFINE_CLK_SMD_RPM(_name##_clk, _name##_a_clk,	      \
-		type, r_id, QCOM_RPM_SMD_KEY_RATE)
+		type, r_id, QCOM_RPM_SMD_KEY_RATE, INT_MAX, 0)
 
 #define DEFINE_CLK_SMD_RPM_BUS(_name, r_id)				      \
 		__DEFINE_CLK_SMD_RPM_PREFIX(bus_##r_id##_,		      \
 		_name##_clk, _name##_a_clk, QCOM_SMD_RPM_BUS_CLK, r_id,	      \
-		QCOM_RPM_SMD_KEY_RATE)
+		QCOM_RPM_SMD_KEY_RATE, INT_MAX, 0)
+
+#define DEFINE_CLK_SMD_RPM_BUS_A(_name, r_id, ao_rate, ao_flags)		      \
+		__DEFINE_CLK_SMD_RPM_PREFIX(bus_##r_id##_,		      \
+		_name##_clk, _name##_a_clk, QCOM_SMD_RPM_BUS_CLK, r_id,	      \
+		QCOM_RPM_SMD_KEY_RATE, ao_rate, ao_flags)
 
 #define DEFINE_CLK_SMD_RPM_CLK_SRC(_name, type, r_id)			      \
 		__DEFINE_CLK_SMD_RPM(					      \
 		_name##_clk_src, _name##_a_clk_src,			      \
-		type, r_id, QCOM_RPM_SMD_KEY_RATE)
+		type, r_id, QCOM_RPM_SMD_KEY_RATE, INT_MAX, 0)
 
 #define DEFINE_CLK_SMD_RPM_BRANCH(_name, type, r_id, r)			      \
 		__DEFINE_CLK_SMD_RPM_BRANCH_PREFIX(branch_,		      \
@@ -128,7 +135,7 @@
 
 #define DEFINE_CLK_SMD_RPM_QDSS(_name, type, r_id)			      \
 		__DEFINE_CLK_SMD_RPM(_name##_clk, _name##_a_clk,	      \
-		type, r_id, QCOM_RPM_SMD_KEY_STATE)
+		type, r_id, QCOM_RPM_SMD_KEY_STATE, INT_MAX, 0)
 
 #define DEFINE_CLK_SMD_RPM_XO_BUFFER(_name, r_id, r)			      \
 		__DEFINE_CLK_SMD_RPM_BRANCH(_name, _name##_a,		      \

-- 
2.41.0