linux-kernel - [PATCH v4 09/23] ata: libahci_platform: Parse ports-implemented property in resources getter

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Message-ID: <20220610081801.11854-10-Sergey.Semin@baikalelectronics.ru>
Date:   Fri, 10 Jun 2022 11:17:47 +0300
From:   Serge Semin <Sergey.Semin@...kalelectronics.ru>
To:     Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Jens Axboe <axboe@...nel.dk>, Hannes Reinecke <hare@...e.de>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Patrice Chotard <patrice.chotard@...s.st.com>
CC:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Rob Herring <robh+dt@...nel.org>, <linux-ide@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: [PATCH v4 09/23] ata: libahci_platform: Parse ports-implemented property in resources getter

The ports-implemented property is mainly used on the OF-based platforms
with no ports mapping initialized by a bootloader/BIOS firmware. Seeing
the same of_property_read_u32()-based pattern has already been implemented
in the generic AHCI LLDD (glue) driver and in the Mediatek, St AHCI
drivers let's move the property read procedure to the generic
ahci_platform_get_resources() method. Thus we'll have the forced ports
mapping feature supported for each OF-based platform which requires that,
and stop re-implementing the same pattern in there a bit simplifying the
code.

Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
---
 drivers/ata/ahci_mtk.c         | 2 --
 drivers/ata/ahci_platform.c    | 3 ---
 drivers/ata/ahci_st.c          | 3 ---
 drivers/ata/libahci_platform.c | 3 +++
 4 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/ata/ahci_mtk.c b/drivers/ata/ahci_mtk.c
index 1f6c85fde983..c056378e3e72 100644
--- a/drivers/ata/ahci_mtk.c
+++ b/drivers/ata/ahci_mtk.c
@@ -118,8 +118,6 @@ static int mtk_ahci_parse_property(struct ahci_host_priv *hpriv,
 				   SYS_CFG_SATA_EN);
 	}
 
-	of_property_read_u32(np, "ports-implemented", &hpriv->force_port_map);
-
 	return 0;
 }
 
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 28a8de5b48b9..9b56490ecbc3 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -56,9 +56,6 @@ static int ahci_probe(struct platform_device *pdev)
 	if (rc)
 		return rc;
 
-	of_property_read_u32(dev->of_node,
-			     "ports-implemented", &hpriv->force_port_map);
-
 	if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
 		hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
 
diff --git a/drivers/ata/ahci_st.c b/drivers/ata/ahci_st.c
index 7526653c843b..068621099c00 100644
--- a/drivers/ata/ahci_st.c
+++ b/drivers/ata/ahci_st.c
@@ -168,9 +168,6 @@ static int st_ahci_probe(struct platform_device *pdev)
 
 	st_ahci_configure_oob(hpriv->mmio);
 
-	of_property_read_u32(dev->of_node,
-			     "ports-implemented", &hpriv->force_port_map);
-
 	err = ahci_platform_init_host(pdev, hpriv, &st_ahci_port_info,
 				      &ahci_platform_sht);
 	if (err) {
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index 8aed7b29c7ab..1a7060646009 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -483,6 +483,9 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
 		goto err_out;
 	}
 
+	of_property_read_u32(dev->of_node,
+			     "ports-implemented", &hpriv->force_port_map);
+
 	if (child_nodes) {
 		for_each_child_of_node(dev->of_node, child) {
 			u32 port;
-- 
2.35.1