linux-kernel - [PATCH v3] soc: qcom: Rework BCM_TCS

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Message-ID: <20241117184352.187184-1-eugen.hristev@linaro.org>
Date: Sun, 17 Nov 2024 20:43:52 +0200
From: Eugen Hristev <eugen.hristev@...aro.org>
To: linux-arm-msm@...r.kernel.org
Cc: linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org,
	konradybcio@...nel.org,
	sboyd@...nel.org,
	andersson@...nel.org,
	evgreen@...omium.org,
	Eugen Hristev <eugen.hristev@...aro.org>
Subject: [PATCH v3] soc: qcom: Rework BCM_TCS_CMD macro

Reworked BCM_TCS_CMD macro in order to fix warnings from sparse:

drivers/clk/qcom/clk-rpmh.c:270:28: warning: restricted __le32 degrades to integer
drivers/clk/qcom/clk-rpmh.c:270:28: warning: restricted __le32 degrades to integer

While at it, used le32_encode_bits which made the code easier to
follow and removed unnecessary shift definitions.

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
Changes in v3:
- align the macro lines better

Changes in v2:
- use le32_encode_bits instead of u32_encode_bits with a cpu_to_le32 on
the fields; this however ment we need to force cast the le32 to the
u32 container.

 drivers/clk/qcom/clk-rpmh.c           |  2 +-
 drivers/interconnect/qcom/bcm-voter.c |  2 +-
 include/soc/qcom/tcs.h                | 26 ++++++++++++--------------
 3 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/drivers/clk/qcom/clk-rpmh.c b/drivers/clk/qcom/clk-rpmh.c
index 4acde937114a..4929893b09c2 100644
--- a/drivers/clk/qcom/clk-rpmh.c
+++ b/drivers/clk/qcom/clk-rpmh.c
@@ -267,7 +267,7 @@ static int clk_rpmh_bcm_send_cmd(struct clk_rpmh *c, bool enable)
 
 	if (c->last_sent_aggr_state != cmd_state) {
 		cmd.addr = c->res_addr;
-		cmd.data = BCM_TCS_CMD(1, enable, 0, cmd_state);
+		cmd.data = (__force u32)BCM_TCS_CMD(1, enable, 0, cmd_state);
 
 		/*
 		 * Send only an active only state request. RPMh continues to
diff --git a/drivers/interconnect/qcom/bcm-voter.c b/drivers/interconnect/qcom/bcm-voter.c
index a2d437a05a11..ce9091cf122b 100644
--- a/drivers/interconnect/qcom/bcm-voter.c
+++ b/drivers/interconnect/qcom/bcm-voter.c
@@ -144,7 +144,7 @@ static inline void tcs_cmd_gen(struct tcs_cmd *cmd, u64 vote_x, u64 vote_y,
 		vote_y = BCM_TCS_CMD_VOTE_MASK;
 
 	cmd->addr = addr;
-	cmd->data = BCM_TCS_CMD(commit, valid, vote_x, vote_y);
+	cmd->data = (__force u32)BCM_TCS_CMD(commit, valid, vote_x, vote_y);
 
 	/*
 	 * Set the wait for completion flag on command that need to be completed
diff --git a/include/soc/qcom/tcs.h b/include/soc/qcom/tcs.h
index 3acca067c72b..d0dfcaa07337 100644
--- a/include/soc/qcom/tcs.h
+++ b/include/soc/qcom/tcs.h
@@ -6,6 +6,9 @@
 #ifndef __SOC_QCOM_TCS_H__
 #define __SOC_QCOM_TCS_H__
 
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+
 #define MAX_RPMH_PAYLOAD	16
 
 /**
@@ -60,22 +63,17 @@ struct tcs_request {
 	struct tcs_cmd *cmds;
 };
 
-#define BCM_TCS_CMD_COMMIT_SHFT		30
-#define BCM_TCS_CMD_COMMIT_MASK		0x40000000
-#define BCM_TCS_CMD_VALID_SHFT		29
-#define BCM_TCS_CMD_VALID_MASK		0x20000000
-#define BCM_TCS_CMD_VOTE_X_SHFT		14
-#define BCM_TCS_CMD_VOTE_MASK		0x3fff
-#define BCM_TCS_CMD_VOTE_Y_SHFT		0
-#define BCM_TCS_CMD_VOTE_Y_MASK		0xfffc000
+#define BCM_TCS_CMD_COMMIT_MASK		BIT(30)
+#define BCM_TCS_CMD_VALID_MASK		BIT(29)
+#define BCM_TCS_CMD_VOTE_MASK		GENMASK(13, 0)
+#define BCM_TCS_CMD_VOTE_Y_MASK		GENMASK(13, 0)
+#define BCM_TCS_CMD_VOTE_X_MASK		GENMASK(27, 14)
 
 /* Construct a Bus Clock Manager (BCM) specific TCS command */
 #define BCM_TCS_CMD(commit, valid, vote_x, vote_y)		\
-	(((commit) << BCM_TCS_CMD_COMMIT_SHFT) |		\
-	((valid) << BCM_TCS_CMD_VALID_SHFT) |			\
-	((cpu_to_le32(vote_x) &					\
-	BCM_TCS_CMD_VOTE_MASK) << BCM_TCS_CMD_VOTE_X_SHFT) |	\
-	((cpu_to_le32(vote_y) &					\
-	BCM_TCS_CMD_VOTE_MASK) << BCM_TCS_CMD_VOTE_Y_SHFT))
+	(le32_encode_bits(commit, BCM_TCS_CMD_COMMIT_MASK) |	\
+	le32_encode_bits(valid, BCM_TCS_CMD_VALID_MASK) |	\
+	le32_encode_bits(vote_x, BCM_TCS_CMD_VOTE_X_MASK) |	\
+	le32_encode_bits(vote_y, BCM_TCS_CMD_VOTE_Y_MASK))
 
 #endif /* __SOC_QCOM_TCS_H__ */
-- 
2.43.0