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

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Message-ID: <c1d4c2b6-85a0-467a-930c-ac2797c72699@oss.qualcomm.com>
Date: Fri, 25 Oct 2024 11:03:10 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Eugen Hristev <eugen.hristev@...aro.org>, linux-arm-msm@...r.kernel.org
Cc: andersson@...nel.org, konradybcio@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] soc: qcom: Rework BCM_TCS_CMD macro

On 25.10.2024 10:48 AM, Eugen Hristev wrote:
> 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 u32_encode_bits which made the code easier to
> follow and removed unnecessary shift definitions.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
> ---
>  include/soc/qcom/tcs.h | 19 ++++++++-----------
>  1 file changed, 8 insertions(+), 11 deletions(-)
> 
> diff --git a/include/soc/qcom/tcs.h b/include/soc/qcom/tcs.h
> index 3acca067c72b..130ed2582f37 100644
> --- a/include/soc/qcom/tcs.h
> +++ b/include/soc/qcom/tcs.h
> @@ -60,22 +60,19 @@ 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_VOTE_Y_MASK		0x3fff
> +#define BCM_TCS_CMD_VOTE_X_MASK		0xfffc000
>  
>  /* 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))
> +	(u32_encode_bits(commit, BCM_TCS_CMD_COMMIT_MASK) |	\
> +	u32_encode_bits(valid, BCM_TCS_CMD_VALID_MASK) |	\
> +	u32_encode_bits((__force u32)cpu_to_le32(vote_x),	\
> +			BCM_TCS_CMD_VOTE_X_MASK) |		\
> +	u32_encode_bits((__force u32)cpu_to_le32(vote_y),	\
> +			BCM_TCS_CMD_VOTE_Y_MASK))

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Konrad