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Message-Id: <20200418105432.11233-3-calvin.johnson@oss.nxp.com>
Date: Sat, 18 Apr 2020 16:24:32 +0530
From: Calvin Johnson <calvin.johnson@....nxp.com>
To: linux.cj@...il.com, Jeremy Linton <jeremy.linton@....com>,
Andrew Lunn <andrew@...n.ch>,
Andy Shevchenko <andy.shevchenko@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Russell King - ARM Linux admin <linux@...linux.org.uk>,
Cristi Sovaiala <cristian.sovaiala@....com>,
Florin Laurentiu Chiculita <florinlaurentiu.chiculita@....com>,
Ioana Ciornei <ioana.ciornei@....com>,
Madalin Bucur <madalin.bucur@....nxp.com>
Cc: netdev@...r.kernel.org, Laurentiu Tudor <laurentiu.tudor@....com>,
linux-acpi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
Diana Madalina Craciun <diana.craciun@....com>,
linux-kernel@...r.kernel.org, Varun Sethi <V.Sethi@....com>,
Marcin Wojtas <mw@...ihalf.com>,
"Rajesh V . Bikkina" <rajesh.bikkina@....com>,
Pankaj Bansal <pankaj.bansal@....com>,
Makarand Pawagi <makarand.pawagi@....com>,
Calvin Johnson <calvin.johnson@....nxp.com>,
"David S. Miller" <davem@...emloft.net>,
Ioana Radulescu <ruxandra.radulescu@....com>
Subject: [RFC net-next PATCH v2 2/2] net: dpaa2-mac: Add ACPI support for DPAA2 MAC driver
Modify dpaa2_mac_connect() to support ACPI along with DT.
Modify dpaa2_mac_get_node() to get the dpmac fwnode from either
DT or ACPI.
Replace of_get_phy_mode with fwnode_get_phy_mode to get
phy-mode for a dpmac_node.
Define and use helper functions fwnode_phy_match() and
fwnode_phy_find_device() to find phy_dev that is later
connected to mac->phylink.
Signed-off-by: Calvin Johnson <calvin.johnson@....nxp.com>
---
Changes in v2:
- Major change following other network drivers supporting ACPI
- dropped v1 patches 1, 2, 4, 5 and 6 as they are no longer valid
- incorporated other v1 review comments
.../net/ethernet/freescale/dpaa2/dpaa2-mac.c | 122 ++++++++++++++----
1 file changed, 94 insertions(+), 28 deletions(-)
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
index 3ee236c5fc37..5a03da54a67f 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
@@ -3,6 +3,9 @@
#include "dpaa2-eth.h"
#include "dpaa2-mac.h"
+#include <linux/acpi.h>
+#include <linux/phy.h>
+#include <linux/phylink.h>
#define phylink_to_dpaa2_mac(config) \
container_of((config), struct dpaa2_mac, phylink_config)
@@ -23,38 +26,56 @@ static int phy_mode(enum dpmac_eth_if eth_if, phy_interface_t *if_mode)
}
/* Caller must call of_node_put on the returned value */
-static struct device_node *dpaa2_mac_get_node(u16 dpmac_id)
+static struct fwnode_handle *dpaa2_mac_get_node(struct device *dev,
+ u16 dpmac_id)
{
- struct device_node *dpmacs, *dpmac = NULL;
- u32 id;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct fwnode_handle *dpmacs, *dpmac = NULL;
+ unsigned long long adr;
+ acpi_status status;
int err;
+ u32 id;
- dpmacs = of_find_node_by_name(NULL, "dpmacs");
- if (!dpmacs)
- return NULL;
+ if (is_of_node(dev->parent->fwnode)) {
+ dpmacs = device_get_named_child_node(dev->parent, "dpmacs");
+ if (!dpmacs)
+ return NULL;
+
+ while ((dpmac = fwnode_get_next_child_node(dpmacs, dpmac))) {
+ err = fwnode_property_read_u32(dpmac, "reg", &id);
+ if (err)
+ continue;
+ if (id == dpmac_id)
+ return dpmac;
+ }
- while ((dpmac = of_get_next_child(dpmacs, dpmac)) != NULL) {
- err = of_property_read_u32(dpmac, "reg", &id);
- if (err)
- continue;
- if (id == dpmac_id)
- break;
+ } else if (is_acpi_node(dev->parent->fwnode)) {
+ device_for_each_child_node(dev->parent, dpmac) {
+ status = acpi_evaluate_integer(ACPI_HANDLE_FWNODE(dpmac),
+ "_ADR", NULL, &adr);
+ if (ACPI_FAILURE(status)) {
+ pr_debug("_ADR returned %d on %s\n",
+ status, (char *)buffer.pointer);
+ continue;
+ } else {
+ id = (u32)adr;
+ if (id == dpmac_id)
+ return dpmac;
+ }
+ }
}
-
- of_node_put(dpmacs);
-
- return dpmac;
+ return NULL;
}
-static int dpaa2_mac_get_if_mode(struct device_node *node,
+static int dpaa2_mac_get_if_mode(struct fwnode_handle *dpmac_node,
struct dpmac_attr attr)
{
phy_interface_t if_mode;
int err;
- err = of_get_phy_mode(node, &if_mode);
- if (!err)
- return if_mode;
+ err = fwnode_get_phy_mode(dpmac_node);
+ if (err > 0)
+ return err;
err = phy_mode(attr.eth_if, &if_mode);
if (!err)
@@ -227,13 +248,40 @@ bool dpaa2_mac_is_type_fixed(struct fsl_mc_device *dpmac_dev,
return fixed;
}
+static int fwnode_phy_match(struct device *dev, const void *phy_fwnode)
+{
+ return dev->fwnode == phy_fwnode;
+}
+
+static struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)
+{
+ struct device *d;
+ struct mdio_device *mdiodev;
+
+ if (!phy_fwnode)
+ return NULL;
+
+ d = bus_find_device(&mdio_bus_type, NULL, phy_fwnode, fwnode_phy_match);
+ if (d) {
+ mdiodev = to_mdio_device(d);
+ if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
+ return to_phy_device(d);
+ put_device(d);
+ }
+
+ return NULL;
+}
+
int dpaa2_mac_connect(struct dpaa2_mac *mac)
{
struct fsl_mc_device *dpmac_dev = mac->mc_dev;
struct net_device *net_dev = mac->net_dev;
- struct device_node *dpmac_node;
+ struct fwnode_handle *dpmac_node = NULL;
+ struct fwnode_reference_args args;
+ struct phy_device *phy_dev;
struct phylink *phylink;
struct dpmac_attr attr;
+ int status;
int err;
err = dpmac_open(mac->mc_io, 0, dpmac_dev->obj_desc.id,
@@ -251,7 +299,7 @@ int dpaa2_mac_connect(struct dpaa2_mac *mac)
mac->if_link_type = attr.link_type;
- dpmac_node = dpaa2_mac_get_node(attr.id);
+ dpmac_node = dpaa2_mac_get_node(&mac->mc_dev->dev, attr.id);
if (!dpmac_node) {
netdev_err(net_dev, "No dpmac@%d node found.\n", attr.id);
err = -ENODEV;
@@ -269,7 +317,7 @@ int dpaa2_mac_connect(struct dpaa2_mac *mac)
* error out if the interface mode requests them and there is no PHY
* to act upon them
*/
- if (of_phy_is_fixed_link(dpmac_node) &&
+ if (of_phy_is_fixed_link(to_of_node(dpmac_node)) &&
(mac->if_mode == PHY_INTERFACE_MODE_RGMII_ID ||
mac->if_mode == PHY_INTERFACE_MODE_RGMII_RXID ||
mac->if_mode == PHY_INTERFACE_MODE_RGMII_TXID)) {
@@ -282,7 +330,7 @@ int dpaa2_mac_connect(struct dpaa2_mac *mac)
mac->phylink_config.type = PHYLINK_NETDEV;
phylink = phylink_create(&mac->phylink_config,
- of_fwnode_handle(dpmac_node), mac->if_mode,
+ dpmac_node, mac->if_mode,
&dpaa2_mac_phylink_ops);
if (IS_ERR(phylink)) {
err = PTR_ERR(phylink);
@@ -290,20 +338,38 @@ int dpaa2_mac_connect(struct dpaa2_mac *mac)
}
mac->phylink = phylink;
- err = phylink_of_phy_connect(mac->phylink, dpmac_node, 0);
+ if (is_of_node(dpmac_node))
+ err = phylink_of_phy_connect(mac->phylink,
+ to_of_node(dpmac_node), 0);
+ else if (is_acpi_node(dpmac_node)) {
+ status = acpi_node_get_property_reference(dpmac_node,
+ "phy-handle",
+ 0, &args);
+ if (ACPI_FAILURE(status))
+ goto err_phylink_destroy;
+ phy_dev = fwnode_phy_find_device(args.fwnode);
+ if (!phy_dev)
+ goto err_phylink_destroy;
+
+ err = phylink_connect_phy(mac->phylink, phy_dev);
+ if (err)
+ phy_detach(phy_dev);
+ }
if (err) {
- netdev_err(net_dev, "phylink_of_phy_connect() = %d\n", err);
+ netdev_err(net_dev, "phylink_fwnode_phy_connect() = %d\n", err);
goto err_phylink_destroy;
}
- of_node_put(dpmac_node);
+ if (is_of_node(dpmac_node))
+ of_node_put(to_of_node(dpmac_node));
return 0;
err_phylink_destroy:
phylink_destroy(mac->phylink);
err_put_node:
- of_node_put(dpmac_node);
+ if (is_of_node(dpmac_node))
+ of_node_put(to_of_node(dpmac_node));
err_close_dpmac:
dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle);
return err;
--
2.17.1
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