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Subject[PATCH net-next v9 15/15] net: dpaa2-mac: Add ACPI support for DPAA2 MAC driver
Date
From: Calvin Johnson <calvin.johnson@oss.nxp.com>

Modify dpaa2_mac_get_node() to get the dpmac fwnode from either
DT or ACPI.

Modify dpaa2_mac_get_if_mode() to get interface mode from dpmac_node
which is a fwnode.

Modify dpaa2_pcs_create() to create pcs from dpmac_node fwnode.

Modify dpaa2_mac_connect() to support ACPI along with DT.

Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org> # from the ACPI side
Acked-by: Grant Likely <grant.likely@arm.com>
---

Changes in v9: None
Changes in v8:
- adjust code over latest changes applied on the driver

Changes in v7:
- remove unnecassary checks

Changes in v6:
- use dev_fwnode()
- remove useless else
- replace of_device_is_available() to fwnode_device_is_available()

Changes in v5:
- replace fwnode_get_id() with OF and ACPI function calls

Changes in v4: None
Changes in v3: None
Changes in v2:
- Refactor OF functions to use fwnode functions


.../net/ethernet/freescale/dpaa2/dpaa2-mac.c | 88 +++++++++++--------
.../net/ethernet/freescale/dpaa2/dpaa2-mac.h | 2 +-
2 files changed, 53 insertions(+), 37 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
index 4dfadf2b70d6..ae6d382d8735 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
@@ -1,6 +1,9 @@
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/* Copyright 2019 NXP */

+#include <linux/acpi.h>
+#include <linux/property.h>
+
#include "dpaa2-eth.h"
#include "dpaa2-mac.h"

@@ -34,39 +37,51 @@ static int phy_mode(enum dpmac_eth_if eth_if, phy_interface_t *if_mode)
return 0;
}

-/* 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 fwnode_handle *fwnode, *parent, *child = NULL;
+ struct device_node *dpmacs = NULL;
int err;
+ u32 id;

- dpmacs = of_find_node_by_name(NULL, "dpmacs");
- if (!dpmacs)
- return NULL;
+ fwnode = dev_fwnode(dev->parent);
+ if (is_of_node(fwnode)) {
+ dpmacs = of_find_node_by_name(NULL, "dpmacs");
+ if (!dpmacs)
+ return NULL;
+ parent = of_fwnode_handle(dpmacs);
+ } else if (is_acpi_node(fwnode)) {
+ parent = fwnode;
+ }

- while ((dpmac = of_get_next_child(dpmacs, dpmac)) != NULL) {
- err = of_property_read_u32(dpmac, "reg", &id);
+ fwnode_for_each_child_node(parent, child) {
+ err = -EINVAL;
+ if (is_acpi_device_node(child))
+ err = acpi_get_local_address(ACPI_HANDLE_FWNODE(child), &id);
+ else if (is_of_node(child))
+ err = of_property_read_u32(to_of_node(child), "reg", &id);
if (err)
continue;
- if (id == dpmac_id)
- break;
- }

+ if (id == dpmac_id) {
+ of_node_put(dpmacs);
+ return child;
+ }
+ }
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)
@@ -235,26 +250,27 @@ static const struct phylink_mac_ops dpaa2_mac_phylink_ops = {
};

static int dpaa2_pcs_create(struct dpaa2_mac *mac,
- struct device_node *dpmac_node, int id)
+ struct fwnode_handle *dpmac_node,
+ int id)
{
struct mdio_device *mdiodev;
- struct device_node *node;
+ struct fwnode_handle *node;

- node = of_parse_phandle(dpmac_node, "pcs-handle", 0);
- if (!node) {
+ node = fwnode_find_reference(dpmac_node, "pcs-handle", 0);
+ if (IS_ERR(node)) {
/* do not error out on old DTS files */
netdev_warn(mac->net_dev, "pcs-handle node not found\n");
return 0;
}

- if (!of_device_is_available(node)) {
+ if (!fwnode_device_is_available(node)) {
netdev_err(mac->net_dev, "pcs-handle node not available\n");
- of_node_put(node);
+ fwnode_handle_put(node);
return -ENODEV;
}

- mdiodev = of_mdio_find_device(node);
- of_node_put(node);
+ mdiodev = fwnode_mdio_find_device(node);
+ fwnode_handle_put(node);
if (!mdiodev)
return -EPROBE_DEFER;

@@ -283,13 +299,13 @@ static void dpaa2_pcs_destroy(struct dpaa2_mac *mac)
int dpaa2_mac_connect(struct dpaa2_mac *mac)
{
struct net_device *net_dev = mac->net_dev;
- struct device_node *dpmac_node;
+ struct fwnode_handle *dpmac_node;
struct phylink *phylink;
int err;

mac->if_link_type = mac->attr.link_type;

- dpmac_node = mac->of_node;
+ dpmac_node = mac->fw_node;
if (!dpmac_node) {
netdev_err(net_dev, "No dpmac@%d node found.\n", mac->attr.id);
return -ENODEV;
@@ -304,7 +320,7 @@ 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)) {
@@ -324,7 +340,7 @@ 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);
@@ -335,9 +351,9 @@ int dpaa2_mac_connect(struct dpaa2_mac *mac)
if (mac->pcs)
phylink_set_pcs(mac->phylink, &mac->pcs->pcs);

- err = phylink_of_phy_connect(mac->phylink, dpmac_node, 0);
+ err = phylink_fwnode_phy_connect(mac->phylink, dpmac_node, 0);
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;
}

@@ -384,8 +400,8 @@ int dpaa2_mac_open(struct dpaa2_mac *mac)
/* Find the device node representing the MAC device and link the device
* behind the associated netdev to it.
*/
- mac->of_node = dpaa2_mac_get_node(mac->attr.id);
- net_dev->dev.of_node = mac->of_node;
+ mac->fw_node = dpaa2_mac_get_node(&mac->mc_dev->dev, mac->attr.id);
+ net_dev->dev.of_node = to_of_node(mac->fw_node);

return 0;

@@ -399,8 +415,8 @@ void dpaa2_mac_close(struct dpaa2_mac *mac)
struct fsl_mc_device *dpmac_dev = mac->mc_dev;

dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle);
- if (mac->of_node)
- of_node_put(mac->of_node);
+ if (mac->fw_node)
+ fwnode_handle_put(mac->fw_node);
}

static char dpaa2_mac_ethtool_stats[][ETH_GSTRING_LEN] = {
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.h
index 8ebcb3420d02..7842cbb2207a 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.h
@@ -24,7 +24,7 @@ struct dpaa2_mac {
phy_interface_t if_mode;
enum dpmac_link_type if_link_type;
struct lynx_pcs *pcs;
- struct device_node *of_node;
+ struct fwnode_handle *fw_node;
};

bool dpaa2_mac_is_type_fixed(struct fsl_mc_device *dpmac_dev,
--
2.31.1
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