linux-kernel - Re: [PATCH 1/2] power: reset: linkstation-poweroff: prepare for new devices

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Date:   Fri, 13 Aug 2021 19:17:39 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Pawel Dembicki <paweldembicki@...il.com>
Cc:     Daniel Gonzalez Cabanelas <dgcbueu@...il.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] power: reset: linkstation-poweroff: prepare for new
 devices

Hi,

On Thu, Jun 24, 2021 at 11:18:11AM +0200, Pawel Dembicki wrote:
> This commit prepare driver for another device support.
> 
> New power_off_cfg structure describes two most important things: name of
> mdio bus and pointer to register setting function. It allow to add new
> device with different mdio bus node and other phy register config.
> 
> Signed-off-by: Pawel Dembicki <paweldembicki@...il.com>
> ---

Thanks, queued.

-- Sebastian

>  drivers/power/reset/linkstation-poweroff.c | 35 ++++++++++++++++++----
>  1 file changed, 29 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/power/reset/linkstation-poweroff.c b/drivers/power/reset/linkstation-poweroff.c
> index f1e843df0e16..cb5a32f852c1 100644
> --- a/drivers/power/reset/linkstation-poweroff.c
> +++ b/drivers/power/reset/linkstation-poweroff.c
> @@ -29,11 +29,21 @@
>  #define LED2_FORCE_ON					(0x8 << 8)
>  #define LEDMASK						GENMASK(11,8)
>  
> +struct power_off_cfg {
> +	char *mdio_node_name;
> +	void (*phy_set_reg)(bool restart);
> +};
> +
>  static struct phy_device *phydev;
> +static const struct power_off_cfg *cfg;
>  
> -static void mvphy_reg_intn(u16 data)
> +static void linkstation_mvphy_reg_intn(bool restart)
>  {
>  	int rc = 0, saved_page;
> +	u16 data = 0;
> +
> +	if (restart)
> +		data = MII_88E1318S_PHY_LED_TCR_FORCE_INT;
>  
>  	saved_page = phy_select_page(phydev, MII_MARVELL_LED_PAGE);
>  	if (saved_page < 0)
> @@ -66,11 +76,16 @@ static void mvphy_reg_intn(u16 data)
>  		dev_err(&phydev->mdio.dev, "Write register failed, %d\n", rc);
>  }
>  
> +static const struct power_off_cfg linkstation_power_off_cfg = {
> +	.mdio_node_name = "mdio",
> +	.phy_set_reg = linkstation_mvphy_reg_intn,
> +};
> +
>  static int linkstation_reboot_notifier(struct notifier_block *nb,
>  				       unsigned long action, void *unused)
>  {
>  	if (action == SYS_RESTART)
> -		mvphy_reg_intn(MII_88E1318S_PHY_LED_TCR_FORCE_INT);
> +		cfg->phy_set_reg(true);
>  
>  	return NOTIFY_DONE;
>  }
> @@ -82,14 +97,18 @@ static struct notifier_block linkstation_reboot_nb = {
>  static void linkstation_poweroff(void)
>  {
>  	unregister_reboot_notifier(&linkstation_reboot_nb);
> -	mvphy_reg_intn(0);
> +	cfg->phy_set_reg(false);
>  
>  	kernel_restart("Power off");
>  }
>  
>  static const struct of_device_id ls_poweroff_of_match[] = {
> -	{ .compatible = "buffalo,ls421d" },
> -	{ .compatible = "buffalo,ls421de" },
> +	{ .compatible = "buffalo,ls421d",
> +	  .data = &linkstation_power_off_cfg,
> +	},
> +	{ .compatible = "buffalo,ls421de",
> +	  .data = &linkstation_power_off_cfg,
> +	},
>  	{ },
>  };
>  
> @@ -97,13 +116,17 @@ static int __init linkstation_poweroff_init(void)
>  {
>  	struct mii_bus *bus;
>  	struct device_node *dn;
> +	const struct of_device_id *match;
>  
>  	dn = of_find_matching_node(NULL, ls_poweroff_of_match);
>  	if (!dn)
>  		return -ENODEV;
>  	of_node_put(dn);
>  
> -	dn = of_find_node_by_name(NULL, "mdio");
> +	match = of_match_node(ls_poweroff_of_match, dn);
> +	cfg = match->data;
> +
> +	dn = of_find_node_by_name(NULL, cfg->mdio_node_name);
>  	if (!dn)
>  		return -ENODEV;
>  
> -- 
> 2.25.1
> 

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