linux-kernel - Re: [PATCH v2 1/5] drivers: mmc: sdhci-cadence: Reformat the code

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Date:   Mon, 23 Jan 2023 20:37:35 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Piyush Malgujar <pmalgujar@...vell.com>, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, adrian.hunter@...el.com,
        ulf.hansson@...aro.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, yamada.masahiro@...ionext.com,
        devicetree@...r.kernel.org
Cc:     jannadurai@...vell.com, cchavva@...vell.com,
        Dhananjay Kangude <dkangude@...ence.com>
Subject: Re: [PATCH v2 1/5] drivers: mmc: sdhci-cadence: Reformat the code

On 23/01/2023 20:27, Piyush Malgujar wrote:
> From: Dhananjay Kangude <dkangude@...ence.com>
> 

Use subject prefixes matching the subsystem (which you can get for
example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
your patch is touching).

(there is no "drivers:" part)

> Reformat the code so that further SD6 changes could be
> added and it could be isolated from SD4 related code.
> Also renamed functions accordingly.

Your code makes much more than just reformat. Split trivial reformating
and renaming from code which has functional impact.


> 
> Signed-off-by: Dhananjay Kangude <dkangude@...ence.com>
> Co-developed-by: Jayanthi Annadurai <jannadurai@...vell.com>
> Signed-off-by: Jayanthi Annadurai <jannadurai@...vell.com>
> Signed-off-by: Piyush Malgujar <pmalgujar@...vell.com>
> ---
>  drivers/mmc/host/sdhci-cadence.c | 165 ++++++++++++++++++++-----------
>  1 file changed, 110 insertions(+), 55 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c
> index 6f2de54a598773879bf339aae8450f63e1251509..cb108ff9abda32767b356bb572abdf8626746cd6 100644
> --- a/drivers/mmc/host/sdhci-cadence.c
> +++ b/drivers/mmc/host/sdhci-cadence.c
> @@ -15,14 +15,14 @@
>  
>  #include "sdhci-pltfm.h"
>  
> -/* HRS - Host Register Set (specific to Cadence) */
> +/* SD 4.0 Controller HRS - Host Register Set (specific to Cadence) */
>  #define SDHCI_CDNS_HRS04		0x10		/* PHY access port */
> -#define   SDHCI_CDNS_HRS04_ACK			BIT(26)
> -#define   SDHCI_CDNS_HRS04_RD			BIT(25)
> -#define   SDHCI_CDNS_HRS04_WR			BIT(24)
> -#define   SDHCI_CDNS_HRS04_RDATA		GENMASK(23, 16)
> -#define   SDHCI_CDNS_HRS04_WDATA		GENMASK(15, 8)
> -#define   SDHCI_CDNS_HRS04_ADDR			GENMASK(5, 0)
> +#define SDHCI_CDNS_SD4_HRS04_ACK		BIT(26)
> +#define SDHCI_CDNS_SD4_HRS04_RD			BIT(25)
> +#define SDHCI_CDNS_SD4_HRS04_WR			BIT(24)
> +#define SDHCI_CDNS_SD4_HRS04_RDATA		GENMASK(23, 16)
> +#define SDHCI_CDNS_SD4_HRS04_WDATA		GENMASK(15, 8)
> +#define SDHCI_CDNS_SD4_HRS04_ADDR		GENMASK(5, 0)
>  
>  #define SDHCI_CDNS_HRS06		0x18		/* eMMC control */
>  #define   SDHCI_CDNS_HRS06_TUNE_UP		BIT(15)
> @@ -38,7 +38,7 @@
>  /* SRS - Slot Register Set (SDHCI-compatible) */
>  #define SDHCI_CDNS_SRS_BASE		0x200
>  
> -/* PHY */
> +/* PHY registers for SD4 controller */
>  #define SDHCI_CDNS_PHY_DLY_SD_HS	0x00
>  #define SDHCI_CDNS_PHY_DLY_SD_DEFAULT	0x01
>  #define SDHCI_CDNS_PHY_DLY_UHS_SDR12	0x02
> @@ -59,24 +59,43 @@
>   */
>  #define SDHCI_CDNS_MAX_TUNING_LOOP	40
>  
> -struct sdhci_cdns_phy_param {
> +struct sdhci_cdns_priv;
> +
> +struct sdhci_cdns_sd4_phy_param {
>  	u8 addr;
>  	u8 data;
>  };
>  
> +struct sdhci_cdns_data {
> +	int (*phy_init)(struct sdhci_cdns_priv *priv);
> +	int (*set_tune_val)(struct sdhci_host *host, unsigned int val);
> +};
> +
> +struct sdhci_cdns_sd4_phy {
> +	unsigned int nr_phy_params;
> +	struct sdhci_cdns_sd4_phy_param phy_params[];
> +};

Defining new structures is not a "reformat".


Best regards,
Krzysztof