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From: Thomas Richard <thomas.richard@bootlin.com>
Date: Mon, 04 Mar 2024 16:35:55 +0100
Subject: [PATCH v4 12/18] phy: cadence-torrent: remove noop_ops phy
 operations
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To: Linus Walleij <linus.walleij@linaro.org>, 
 Bartosz Golaszewski <brgl@bgdev.pl>, Andy Shevchenko <andy@kernel.org>, 
 Tony Lindgren <tony@atomide.com>, 
 Haojian Zhuang <haojian.zhuang@linaro.org>, Vignesh R <vigneshr@ti.com>, 
 Aaro Koskinen <aaro.koskinen@iki.fi>, 
 Janusz Krzysztofik <jmkrzyszt@gmail.com>, 
 Andi Shyti <andi.shyti@kernel.org>, Peter Rosin <peda@axentia.se>, 
 Vinod Koul <vkoul@kernel.org>, Kishon Vijay Abraham I <kishon@kernel.org>, 
 Philipp Zabel <p.zabel@pengutronix.de>, 
 Lorenzo Pieralisi <lpieralisi@kernel.org>, 
 =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= <kw@linux.com>, 
 Rob Herring <robh@kernel.org>, Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, 
 linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, 
 linux-i2c@vger.kernel.org, linux-phy@lists.infradead.org, 
 linux-pci@vger.kernel.org, gregory.clement@bootlin.com, 
 theo.lebrun@bootlin.com, thomas.petazzoni@bootlin.com, u-kumar1@ti.com, 
 Thomas Richard <thomas.richard@bootlin.com>

Even if a PHY is already configured, the PHY operations are needed during
resume stage, as the PHY is in reset state.
The noop_ops PHY operations is removed to always have PHY operations.
The already_configured flag is checked at the begening of init, configure
and poweron operations to keep the already_configured behaviour.

Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
---
 drivers/phy/cadence/phy-cadence-torrent.c | 30 +++++++++++++-----------------
 1 file changed, 13 insertions(+), 17 deletions(-)

diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
index b35fbc8a60e5..52cadca4c07b 100644
--- a/drivers/phy/cadence/phy-cadence-torrent.c
+++ b/drivers/phy/cadence/phy-cadence-torrent.c
@@ -1593,6 +1593,9 @@ static int cdns_torrent_dp_configure(struct phy *phy,
 	struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent);
 	int ret;
 
+	if (cdns_phy->already_configured)
+		return 0;
+
 	ret = cdns_torrent_dp_verify_config(inst, &opts->dp);
 	if (ret) {
 		dev_err(&phy->dev, "invalid params for phy configure\n");
@@ -1628,6 +1631,12 @@ static int cdns_torrent_phy_on(struct phy *phy)
 	u32 read_val;
 	int ret;
 
+	if (cdns_phy->already_configured) {
+		/* Give 5ms to 10ms delay for the PIPE clock to be stable */
+		usleep_range(5000, 10000);
+		return 0;
+	}
+
 	if (cdns_phy->nsubnodes == 1) {
 		/* Take the PHY lane group out of reset */
 		reset_control_deassert(inst->lnk_rst);
@@ -2306,6 +2315,9 @@ static int cdns_torrent_phy_init(struct phy *phy)
 	u32 num_regs;
 	int i, j;
 
+	if (cdns_phy->already_configured)
+		return 0;
+
 	if (cdns_phy->nsubnodes > 1) {
 		if (phy_type == TYPE_DP)
 			return cdns_torrent_dp_multilink_init(cdns_phy, inst, phy);
@@ -2443,19 +2455,6 @@ static const struct phy_ops cdns_torrent_phy_ops = {
 	.owner		= THIS_MODULE,
 };
 
-static int cdns_torrent_noop_phy_on(struct phy *phy)
-{
-	/* Give 5ms to 10ms delay for the PIPE clock to be stable */
-	usleep_range(5000, 10000);
-
-	return 0;
-}
-
-static const struct phy_ops noop_ops = {
-	.power_on	= cdns_torrent_noop_phy_on,
-	.owner		= THIS_MODULE,
-};
-
 static
 int cdns_torrent_phy_configure_multilink(struct cdns_torrent_phy *cdns_phy)
 {
@@ -2869,10 +2868,7 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
 		of_property_read_u32(child, "cdns,ssc-mode",
 				     &cdns_phy->phys[node].ssc_mode);
 
-		if (!cdns_phy->already_configured)
-			gphy = devm_phy_create(dev, child, &cdns_torrent_phy_ops);
-		else
-			gphy = devm_phy_create(dev, child, &noop_ops);
+		gphy = devm_phy_create(dev, child, &cdns_torrent_phy_ops);
 		if (IS_ERR(gphy)) {
 			ret = PTR_ERR(gphy);
 			goto put_child;

-- 
2.39.2