From f6f5451d469bb1541fe50dfe1661c114bc8b30b9 Mon Sep 17 00:00:00 2001
From: Michal Simek <michal.simek@xilinx.com>
Date: Mon, 7 Feb 2022 10:36:33 +0100
Subject: [PATCH] scsi: ceva: Enable PHY and reset support

Add phy and reset support for ceva sata IP. Phy and reset are optional
properties that's why detect if description is available. If not just
continue with operation.
This code was tested on Xilinx Kria SOM kv260-revA with sata connector
populated.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/eb3adf649be866aab19fc70ecc0fc8921545b1ac.1644226590.git.michal.simek@xilinx.com
---
 drivers/ata/sata_ceva.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/drivers/ata/sata_ceva.c b/drivers/ata/sata_ceva.c
index b71f102..43bcc59 100644
--- a/drivers/ata/sata_ceva.c
+++ b/drivers/ata/sata_ceva.c
@@ -6,9 +6,12 @@
 #include <common.h>
 #include <dm.h>
 #include <ahci.h>
+#include <generic-phy.h>
 #include <log.h>
+#include <reset.h>
 #include <scsi.h>
 #include <asm/io.h>
+#include <dm/device_compat.h>
 #include <linux/ioport.h>
 
 /* Vendor Specific Register Offsets */
@@ -181,6 +184,47 @@ static int sata_ceva_bind(struct udevice *dev)
 static int sata_ceva_probe(struct udevice *dev)
 {
 	struct ceva_sata_priv *priv = dev_get_priv(dev);
+	struct phy phy;
+	int ret;
+	struct reset_ctl_bulk resets;
+
+	ret = generic_phy_get_by_index(dev, 0, &phy);
+	if (!ret) {
+		dev_dbg(dev, "Perform PHY initialization\n");
+		ret = generic_phy_init(&phy);
+		if (ret)
+			return ret;
+	} else if (ret != -ENOENT) {
+		dev_dbg(dev, "could not get phy (err %d)\n", ret);
+		return ret;
+	}
+
+	/* reset is optional */
+	ret = reset_get_bulk(dev, &resets);
+	if (ret && ret != -ENOTSUPP && ret != -ENOENT) {
+		dev_dbg(dev, "Getting reset fails (err %d)\n", ret);
+		return ret;
+	}
+
+	/* Just trigger reset when reset is specified */
+	if (!ret) {
+		dev_dbg(dev, "Perform IP reset\n");
+		ret = reset_deassert_bulk(&resets);
+		if (ret) {
+			dev_dbg(dev, "Reset fails (err %d)\n", ret);
+			reset_release_bulk(&resets);
+			return ret;
+		}
+	}
+
+	if (phy.dev) {
+		dev_dbg(dev, "Perform PHY power on\n");
+		ret = generic_phy_power_on(&phy);
+		if (ret) {
+			dev_dbg(dev, "PHY power on failed (err %d)\n", ret);
+			return ret;
+		}
+	}
 
 	ceva_init_sata(priv);
 
-- 
2.7.4