Commit 0c77ec3d authored by Pawel Dembicki's avatar Pawel Dembicki Committed by Sebastian Reichel
Browse files

power: reset: linkstation-poweroff: add new device 



This commit introduces support for NETGEAR ReadyNAS Duo v2.
This device use bit 4 of LED[2:0] Polarity Control Register to indicate
AC Power loss.

For more details about AC loss detection in NETGEAR ReadyNAS Duo v2,
please look at the file:
RND_5.3.13_WW.src/u-boot/board/mv_feroceon/mv_hal/usibootup/usibootup.c
from Netgear GPL sources.

Signed-off-by: default avatarPawel Dembicki <paweldembicki@gmail.com>
Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
parent e2f471ef

drivers/power/reset/linkstation-poweroff.c

+42 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#define MII_MARVELL_PHY_PAGE		22



#define MII_PHY_LED_CTRL		16

#define MII_PHY_LED_POL_CTRL		17

#define MII_88E1318S_PHY_LED_TCR	18

#define MII_88E1318S_PHY_WOL_CTRL	16

#define MII_M1011_IEVENT		19
@@ -29,6 +30,8 @@ 
#define LED2_FORCE_ON					(0x8 << 8)

#define LEDMASK						GENMASK(11,8)



#define MII_88E1318S_PHY_LED_POL_LED2		BIT(4)



struct power_off_cfg {

	char *mdio_node_name;

	void (*phy_set_reg)(bool restart);
@@ -76,11 +79,47 @@ static void linkstation_mvphy_reg_intn(bool restart) 
		dev_err(&phydev->mdio.dev, "Write register failed, %d\n", rc);

}



static void readynas_mvphy_set_reg(bool restart)

{

	int rc = 0, saved_page;

	u16 data = 0;



	if (restart)

		data = MII_88E1318S_PHY_LED_POL_LED2;



	saved_page = phy_select_page(phydev, MII_MARVELL_LED_PAGE);

	if (saved_page < 0)

		goto err;



	/* Set the LED[2].0 Polarity bit to the required state */

	__phy_modify(phydev, MII_PHY_LED_POL_CTRL,

		     MII_88E1318S_PHY_LED_POL_LED2, data);



	if (!data) {

		/* If WOL was enabled and a magic packet was received before powering

		 * off, we won't be able to wake up by sending another magic packet.

		 * Clear WOL status.

		 */

		__phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_MARVELL_WOL_PAGE);

		__phy_set_bits(phydev, MII_88E1318S_PHY_WOL_CTRL,

			       MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS);

	}

err:

	rc = phy_restore_page(phydev, saved_page, rc);

	if (rc < 0)

		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 const struct power_off_cfg readynas_power_off_cfg = {

	.mdio_node_name = "mdio-bus",

	.phy_set_reg = readynas_mvphy_set_reg,

};



static int linkstation_reboot_notifier(struct notifier_block *nb,

				       unsigned long action, void *unused)

{
@@ -109,6 +148,9 @@ static const struct of_device_id ls_poweroff_of_match[] = { 
	{ .compatible = "buffalo,ls421de",

	  .data = &linkstation_power_off_cfg,

	},

	{ .compatible = "netgear,readynas-duo-v2",

	  .data = &readynas_power_off_cfg,

	},

	{ },

};