linux-kernel - Re: [PATCH v2 04/36] soc: fsl: cpm1: tsa: Use BIT(), GENMASK() and FIELD

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Message-ID: <b044e3a1-7ec5-4f3e-942e-59bbde37776b@csgroup.eu>
Date: Fri, 23 Aug 2024 10:04:23 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Herve Codina <herve.codina@...tlin.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Qiang Zhao <qiang.zhao@....com>,
 Li Yang <leoyang.li@....com>, Mark Brown <broonie@...nel.org>
Cc: linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v2 04/36] soc: fsl: cpm1: tsa: Use BIT(), GENMASK() and
 FIELD_PREP() macros



Le 08/08/2024 à 09:10, Herve Codina a écrit :
> checkpatch.pl signals the following improvement for tsa.c
>    CHECK: Prefer using the BIT macro
> 
> Follow its suggestion and convert the code to BIT() and related macros.
> 
> Signed-off-by: Herve Codina <herve.codina@...tlin.com>

Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>

> ---
>   drivers/soc/fsl/qe/tsa.c | 127 +++++++++++++++++++++------------------
>   1 file changed, 68 insertions(+), 59 deletions(-)
> 
> diff --git a/drivers/soc/fsl/qe/tsa.c b/drivers/soc/fsl/qe/tsa.c
> index 53968ea84c88..dc4dda17dab8 100644
> --- a/drivers/soc/fsl/qe/tsa.c
> +++ b/drivers/soc/fsl/qe/tsa.c
> @@ -9,6 +9,7 @@
>   
>   #include "tsa.h"
>   #include <dt-bindings/soc/cpm1-fsl,tsa.h>
> +#include <linux/bitfield.h>
>   #include <linux/clk.h>
>   #include <linux/io.h>
>   #include <linux/module.h>
> @@ -19,47 +20,52 @@
>   
>   
>   /* TSA SI RAM routing tables entry */
> -#define TSA_SIRAM_ENTRY_LAST		(1 << 16)
> -#define TSA_SIRAM_ENTRY_BYTE		(1 << 17)
> -#define TSA_SIRAM_ENTRY_CNT(x)		(((x) & 0x0f) << 18)
> -#define TSA_SIRAM_ENTRY_CSEL_MASK	(0x7 << 22)
> -#define TSA_SIRAM_ENTRY_CSEL_NU		(0x0 << 22)
> -#define TSA_SIRAM_ENTRY_CSEL_SCC2	(0x2 << 22)
> -#define TSA_SIRAM_ENTRY_CSEL_SCC3	(0x3 << 22)
> -#define TSA_SIRAM_ENTRY_CSEL_SCC4	(0x4 << 22)
> -#define TSA_SIRAM_ENTRY_CSEL_SMC1	(0x5 << 22)
> -#define TSA_SIRAM_ENTRY_CSEL_SMC2	(0x6 << 22)
> +#define TSA_SIRAM_ENTRY_LAST		BIT(16)
> +#define TSA_SIRAM_ENTRY_BYTE		BIT(17)
> +#define TSA_SIRAM_ENTRY_CNT_MASK	GENMASK(21, 18)
> +#define TSA_SIRAM_ENTRY_CNT(x)		FIELD_PREP(TSA_SIRAM_ENTRY_CNT_MASK, x)
> +#define TSA_SIRAM_ENTRY_CSEL_MASK	GENMASK(24, 22)
> +#define TSA_SIRAM_ENTRY_CSEL_NU		FIELD_PREP_CONST(TSA_SIRAM_ENTRY_CSEL_MASK, 0x0)
> +#define TSA_SIRAM_ENTRY_CSEL_SCC2	FIELD_PREP_CONST(TSA_SIRAM_ENTRY_CSEL_MASK, 0x2)
> +#define TSA_SIRAM_ENTRY_CSEL_SCC3	FIELD_PREP_CONST(TSA_SIRAM_ENTRY_CSEL_MASK, 0x3)
> +#define TSA_SIRAM_ENTRY_CSEL_SCC4	FIELD_PREP_CONST(TSA_SIRAM_ENTRY_CSEL_MASK, 0x4)
> +#define TSA_SIRAM_ENTRY_CSEL_SMC1	FIELD_PREP_CONST(TSA_SIRAM_ENTRY_CSEL_MASK, 0x5)
> +#define TSA_SIRAM_ENTRY_CSEL_SMC2	FIELD_PREP_CONST(TSA_SIRAM_ENTRY_CSEL_MASK, 0x6)
>   
>   /* SI mode register (32 bits) */
>   #define TSA_SIMODE	0x00
> -#define   TSA_SIMODE_SMC2			0x80000000
> -#define   TSA_SIMODE_SMC1			0x00008000
> -#define   TSA_SIMODE_TDMA(x)			((x) << 0)
> -#define   TSA_SIMODE_TDMB(x)			((x) << 16)
> -#define     TSA_SIMODE_TDM_MASK			0x0fff
> -#define     TSA_SIMODE_TDM_SDM_MASK		0x0c00
> -#define       TSA_SIMODE_TDM_SDM_NORM		0x0000
> -#define       TSA_SIMODE_TDM_SDM_ECHO		0x0400
> -#define       TSA_SIMODE_TDM_SDM_INTL_LOOP	0x0800
> -#define       TSA_SIMODE_TDM_SDM_LOOP_CTRL	0x0c00
> -#define     TSA_SIMODE_TDM_RFSD(x)		((x) << 8)
> -#define     TSA_SIMODE_TDM_DSC			0x0080
> -#define     TSA_SIMODE_TDM_CRT			0x0040
> -#define     TSA_SIMODE_TDM_STZ			0x0020
> -#define     TSA_SIMODE_TDM_CE			0x0010
> -#define     TSA_SIMODE_TDM_FE			0x0008
> -#define     TSA_SIMODE_TDM_GM			0x0004
> -#define     TSA_SIMODE_TDM_TFSD(x)		((x) << 0)
> +#define   TSA_SIMODE_SMC2			BIT(31)
> +#define   TSA_SIMODE_SMC1			BIT(15)
> +#define   TSA_SIMODE_TDMA_MASK			GENMASK(11, 0)
> +#define   TSA_SIMODE_TDMA(x)			FIELD_PREP(TSA_SIMODE_TDMA_MASK, x)
> +#define   TSA_SIMODE_TDMB_MASK			GENMASK(27, 16)
> +#define   TSA_SIMODE_TDMB(x)			FIELD_PREP(TSA_SIMODE_TDMB_MASK, x)
> +#define     TSA_SIMODE_TDM_MASK			GENMASK(11, 0)
> +#define     TSA_SIMODE_TDM_SDM_MASK		GENMASK(11, 10)
> +#define       TSA_SIMODE_TDM_SDM_NORM		FIELD_PREP_CONST(TSA_SIMODE_TDM_SDM_MASK, 0x0)
> +#define       TSA_SIMODE_TDM_SDM_ECHO		FIELD_PREP_CONST(TSA_SIMODE_TDM_SDM_MASK, 0x1)
> +#define       TSA_SIMODE_TDM_SDM_INTL_LOOP	FIELD_PREP_CONST(TSA_SIMODE_TDM_SDM_MASK, 0x2)
> +#define       TSA_SIMODE_TDM_SDM_LOOP_CTRL	FIELD_PREP_CONST(TSA_SIMODE_TDM_SDM_MASK, 0x3)
> +#define     TSA_SIMODE_TDM_RFSD_MASK		GENMASK(9, 8)
> +#define     TSA_SIMODE_TDM_RFSD(x)		FIELD_PREP(TSA_SIMODE_TDM_RFSD_MASK, x)
> +#define     TSA_SIMODE_TDM_DSC			BIT(7)
> +#define     TSA_SIMODE_TDM_CRT			BIT(6)
> +#define     TSA_SIMODE_TDM_STZ			BIT(5)
> +#define     TSA_SIMODE_TDM_CE			BIT(4)
> +#define     TSA_SIMODE_TDM_FE			BIT(3)
> +#define     TSA_SIMODE_TDM_GM			BIT(2)
> +#define     TSA_SIMODE_TDM_TFSD_MASK		GENMASK(1, 0)
> +#define     TSA_SIMODE_TDM_TFSD(x)		FIELD_PREP(TSA_SIMODE_TDM_TFSD_MASK, x)
>   
>   /* SI global mode register (8 bits) */
>   #define TSA_SIGMR	0x04
> -#define TSA_SIGMR_ENB			(1<<3)
> -#define TSA_SIGMR_ENA			(1<<2)
> -#define TSA_SIGMR_RDM_MASK		0x03
> -#define   TSA_SIGMR_RDM_STATIC_TDMA	0x00
> -#define   TSA_SIGMR_RDM_DYN_TDMA	0x01
> -#define   TSA_SIGMR_RDM_STATIC_TDMAB	0x02
> -#define   TSA_SIGMR_RDM_DYN_TDMAB	0x03
> +#define TSA_SIGMR_ENB			BIT(3)
> +#define TSA_SIGMR_ENA			BIT(2)
> +#define TSA_SIGMR_RDM_MASK		GENMASK(1, 0)
> +#define   TSA_SIGMR_RDM_STATIC_TDMA	FIELD_PREP_CONST(TSA_SIGMR_RDM_MASK, 0x0)
> +#define   TSA_SIGMR_RDM_DYN_TDMA	FIELD_PREP_CONST(TSA_SIGMR_RDM_MASK, 0x1)
> +#define   TSA_SIGMR_RDM_STATIC_TDMAB	FIELD_PREP_CONST(TSA_SIGMR_RDM_MASK, 0x2)
> +#define   TSA_SIGMR_RDM_DYN_TDMAB	FIELD_PREP_CONST(TSA_SIGMR_RDM_MASK, 0x3)
>   
>   /* SI status register (8 bits) */
>   #define TSA_SISTR	0x06
> @@ -69,30 +75,33 @@
>   
>   /* SI clock route register (32 bits) */
>   #define TSA_SICR	0x0C
> -#define   TSA_SICR_SCC2(x)		((x) << 8)
> -#define   TSA_SICR_SCC3(x)		((x) << 16)
> -#define   TSA_SICR_SCC4(x)		((x) << 24)
> -#define     TSA_SICR_SCC_MASK		0x0ff
> -#define     TSA_SICR_SCC_GRX		(1 << 7)
> -#define     TSA_SICR_SCC_SCX_TSA	(1 << 6)
> -#define     TSA_SICR_SCC_RXCS_MASK	(0x7 << 3)
> -#define       TSA_SICR_SCC_RXCS_BRG1	(0x0 << 3)
> -#define       TSA_SICR_SCC_RXCS_BRG2	(0x1 << 3)
> -#define       TSA_SICR_SCC_RXCS_BRG3	(0x2 << 3)
> -#define       TSA_SICR_SCC_RXCS_BRG4	(0x3 << 3)
> -#define       TSA_SICR_SCC_RXCS_CLK15	(0x4 << 3)
> -#define       TSA_SICR_SCC_RXCS_CLK26	(0x5 << 3)
> -#define       TSA_SICR_SCC_RXCS_CLK37	(0x6 << 3)
> -#define       TSA_SICR_SCC_RXCS_CLK48	(0x7 << 3)
> -#define     TSA_SICR_SCC_TXCS_MASK	(0x7 << 0)
> -#define       TSA_SICR_SCC_TXCS_BRG1	(0x0 << 0)
> -#define       TSA_SICR_SCC_TXCS_BRG2	(0x1 << 0)
> -#define       TSA_SICR_SCC_TXCS_BRG3	(0x2 << 0)
> -#define       TSA_SICR_SCC_TXCS_BRG4	(0x3 << 0)
> -#define       TSA_SICR_SCC_TXCS_CLK15	(0x4 << 0)
> -#define       TSA_SICR_SCC_TXCS_CLK26	(0x5 << 0)
> -#define       TSA_SICR_SCC_TXCS_CLK37	(0x6 << 0)
> -#define       TSA_SICR_SCC_TXCS_CLK48	(0x7 << 0)
> +#define   TSA_SICR_SCC2_MASK		GENMASK(15, 8)
> +#define   TSA_SICR_SCC2(x)		FIELD_PREP(TSA_SICR_SCC2_MASK, x)
> +#define   TSA_SICR_SCC3_MASK		GENMASK(23, 16)
> +#define   TSA_SICR_SCC3(x)		FIELD_PREP(TSA_SICR_SCC3_MASK, x)
> +#define   TSA_SICR_SCC4_MASK		GENMASK(31, 24)
> +#define   TSA_SICR_SCC4(x)		FIELD_PREP(TSA_SICR_SCC4_MASK, x)
> +#define     TSA_SICR_SCC_MASK		GENMASK(7, 0)
> +#define     TSA_SICR_SCC_GRX		BIT(7)
> +#define     TSA_SICR_SCC_SCX_TSA	BIT(6)
> +#define     TSA_SICR_SCC_RXCS_MASK	GENMASK(5, 3)
> +#define       TSA_SICR_SCC_RXCS_BRG1	FIELD_PREP_CONST(TSA_SICR_SCC_RXCS_MASK, 0x0)
> +#define       TSA_SICR_SCC_RXCS_BRG2	FIELD_PREP_CONST(TSA_SICR_SCC_RXCS_MASK, 0x1)
> +#define       TSA_SICR_SCC_RXCS_BRG3	FIELD_PREP_CONST(TSA_SICR_SCC_RXCS_MASK, 0x2)
> +#define       TSA_SICR_SCC_RXCS_BRG4	FIELD_PREP_CONST(TSA_SICR_SCC_RXCS_MASK, 0x3)
> +#define       TSA_SICR_SCC_RXCS_CLK15	FIELD_PREP_CONST(TSA_SICR_SCC_RXCS_MASK, 0x4)
> +#define       TSA_SICR_SCC_RXCS_CLK26	FIELD_PREP_CONST(TSA_SICR_SCC_RXCS_MASK, 0x5)
> +#define       TSA_SICR_SCC_RXCS_CLK37	FIELD_PREP_CONST(TSA_SICR_SCC_RXCS_MASK, 0x6)
> +#define       TSA_SICR_SCC_RXCS_CLK48	FIELD_PREP_CONST(TSA_SICR_SCC_RXCS_MASK, 0x7)
> +#define     TSA_SICR_SCC_TXCS_MASK	GENMASK(2, 0)
> +#define       TSA_SICR_SCC_TXCS_BRG1	FIELD_PREP_CONST(TSA_SICR_SCC_TXCS_MASK, 0x0)
> +#define       TSA_SICR_SCC_TXCS_BRG2	FIELD_PREP_CONST(TSA_SICR_SCC_TXCS_MASK, 0x1)
> +#define       TSA_SICR_SCC_TXCS_BRG3	FIELD_PREP_CONST(TSA_SICR_SCC_TXCS_MASK, 0x2)
> +#define       TSA_SICR_SCC_TXCS_BRG4	FIELD_PREP_CONST(TSA_SICR_SCC_TXCS_MASK, 0x3)
> +#define       TSA_SICR_SCC_TXCS_CLK15	FIELD_PREP_CONST(TSA_SICR_SCC_TXCS_MASK, 0x4)
> +#define       TSA_SICR_SCC_TXCS_CLK26	FIELD_PREP_CONST(TSA_SICR_SCC_TXCS_MASK, 0x5)
> +#define       TSA_SICR_SCC_TXCS_CLK37	FIELD_PREP_CONST(TSA_SICR_SCC_TXCS_MASK, 0x6)
> +#define       TSA_SICR_SCC_TXCS_CLK48	FIELD_PREP_CONST(TSA_SICR_SCC_TXCS_MASK, 0x7)
>   
>   /* Serial interface RAM pointer register (32 bits) */
>   #define TSA_SIRP	0x10