linux-kernel - Re: [PATCH 3/3] hwmon: (xgene) Migrate to use generic PCC shmem related macros

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Date:   Tue, 26 Sep 2023 05:42:16 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-acpi@...r.kernel.org,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Andi Shyti <andi.shyti@...nel.org>,
        Jean Delvare <jdelvare@...e.com>
Subject: Re: [PATCH 3/3] hwmon: (xgene) Migrate to use generic PCC shmem
 related macros

On Tue, Sep 26, 2023 at 01:28:02PM +0100, Sudeep Holla wrote:
> Use the newly defined common and generic PCC shared memory region
> related macros in this driver to replace the locally defined ones.
> 
> Cc: Jean Delvare <jdelvare@...e.com>
> Cc: Guenter Roeck <linux@...ck-us.net>
> Signed-off-by: Sudeep Holla <sudeep.holla@....com>

Acked-by: Guenter Roeck <linux@...ck-us.net>

> ---
>  drivers/hwmon/xgene-hwmon.c | 16 +++++-----------
>  1 file changed, 5 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/hwmon/xgene-hwmon.c b/drivers/hwmon/xgene-hwmon.c
> index 78d9f52e2a71..1ccdd61b6d13 100644
> --- a/drivers/hwmon/xgene-hwmon.c
> +++ b/drivers/hwmon/xgene-hwmon.c
> @@ -57,12 +57,6 @@
>  	(MSG_TYPE_SET(MSG_TYPE_PWRMGMT) | \
>  	MSG_SUBTYPE_SET(hndl) | TPC_CMD_SET(cmd) | type)
>  
> -/* PCC defines */
> -#define PCC_SIGNATURE_MASK		0x50424300
> -#define PCCC_GENERATE_DB_INT		BIT(15)
> -#define PCCS_CMD_COMPLETE		BIT(0)
> -#define PCCS_SCI_DOORBEL		BIT(1)
> -#define PCCS_PLATFORM_NOTIFICATION	BIT(3)
>  /*
>   * Arbitrary retries in case the remote processor is slow to respond
>   * to PCC commands
> @@ -142,15 +136,15 @@ static int xgene_hwmon_pcc_rd(struct xgene_hwmon_dev *ctx, u32 *msg)
>  
>  	/* Write signature for subspace */
>  	WRITE_ONCE(generic_comm_base->signature,
> -		   cpu_to_le32(PCC_SIGNATURE_MASK | ctx->mbox_idx));
> +		   cpu_to_le32(PCC_SIGNATURE | ctx->mbox_idx));
>  
>  	/* Write to the shared command region */
>  	WRITE_ONCE(generic_comm_base->command,
> -		   cpu_to_le16(MSG_TYPE(msg[0]) | PCCC_GENERATE_DB_INT));
> +		   cpu_to_le16(MSG_TYPE(msg[0]) | PCC_CMD_GENERATE_DB_INTR));
>  
>  	/* Flip CMD COMPLETE bit */
>  	val = le16_to_cpu(READ_ONCE(generic_comm_base->status));
> -	val &= ~PCCS_CMD_COMPLETE;
> +	val &= ~PCC_STATUS_CMD_COMPLETE;
>  	WRITE_ONCE(generic_comm_base->status, cpu_to_le16(val));
>  
>  	/* Copy the message to the PCC comm space */
> @@ -544,7 +538,7 @@ static void xgene_hwmon_pcc_rx_cb(struct mbox_client *cl, void *msg)
>  	msg = generic_comm_base + 1;
>  	/* Check if platform sends interrupt */
>  	if (!xgene_word_tst_and_clr(&generic_comm_base->status,
> -				    PCCS_SCI_DOORBEL))
> +				    PCC_STATUS_SCI_DOORBELL))
>  		return;
>  
>  	/*
> @@ -566,7 +560,7 @@ static void xgene_hwmon_pcc_rx_cb(struct mbox_client *cl, void *msg)
>  	      TPC_CMD(((u32 *)msg)[0]) == TPC_ALARM))) {
>  		/* Check if platform completes command */
>  		if (xgene_word_tst_and_clr(&generic_comm_base->status,
> -					   PCCS_CMD_COMPLETE)) {
> +					   PCC_STATUS_CMD_COMPLETE)) {
>  			ctx->sync_msg.msg = ((u32 *)msg)[0];
>  			ctx->sync_msg.param1 = ((u32 *)msg)[1];
>  			ctx->sync_msg.param2 = ((u32 *)msg)[2];
> 
> -- 
> 2.42.0
>