Re: [net-next PATCH v6 15/15] net: dpaa2-mac: Add ACPI support for DPAA2 MAC driver

2021-02-18 Thread Andy Shevchenko
On Thu, Feb 18, 2021 at 7:29 AM Calvin Johnson
 wrote:
>
> 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.

...

> +   if (is_of_node(fwnode))

Redundant check I think. If it's not an fwnode, the dpmacs is NULL and
of_node_put() is NULL-aware.

> +   of_node_put(dpmacs);

...

> +   if (is_of_node(fwnode))
> +   of_node_put(dpmacs);

Ditto.

...

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

Do we need to remove this blank line?

...

> +   if (is_of_node(dpmac_node))
> +   fwnode_handle_put(dpmac_node);

> +   if (is_of_node(dpmac_node))
> +   fwnode_handle_put(dpmac_node);

Also not sure that you need a check in the above code excerpts.

-- 
With Best Regards,
Andy Shevchenko


[net-next PATCH v6 15/15] net: dpaa2-mac: Add ACPI support for DPAA2 MAC driver

2021-02-17 Thread Calvin Johnson
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 
---

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  | 91 +++
 1 file changed, 55 insertions(+), 36 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c 
b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
index ccaf7e35abeb..3e39a15b001f 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 
+#include 
+
 #include "dpaa2-eth.h"
 #include "dpaa2-mac.h"
 
@@ -34,39 +37,53 @@ 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", );
+   fwnode_for_each_child_node(parent, child) {
+   err = -EINVAL;
+   if (is_acpi_device_node(child))
+   err = acpi_get_local_address(ACPI_HANDLE_FWNODE(child), 
);
+   else if (is_of_node(child))
+   err = of_property_read_u32(to_of_node(child), "reg", 
);
if (err)
continue;
-   if (id == dpmac_id)
-   break;
-   }
 
-   of_node_put(dpmacs);
-
-   return dpmac;
+   if (id == dpmac_id) {
+   if (is_of_node(fwnode))
+   of_node_put(dpmacs);
+   return child;
+   }
+   }
+   if (is_of_node(fwnode))
+   of_node_put(dpmacs);
+   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, _mode);
-   if (!err)
-   return if_mode;
+   err = fwnode_get_phy_mode(dpmac_node);
+   if (err > 0)
+   return err;
 
err = phy_mode(attr.eth_if, _mode);
if (!err)
@@ -235,26 +252,27 @@ 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 +301,12 @@ static void