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net: renesas: rswitch: Add runtime speed change support

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The latest SoC version can support runtime speed change. So,
add detect SoC version by using soc_device_match() and then
reconfigure the hardware of this and SerDes if needed.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230807003231.1552062-2-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Yoshihiro Shimoda
2023-08-07 09:32:30 +09:00
committed by Jakub Kicinski
parent f1d152eb66
commit c009b903f8
2 changed files with 25 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/net/ethernet/renesas/rswitch.c
View File

@@ -20,6 +20,7 @@
#include <linux/rtnetlink.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/sys_soc.h>
#include "rswitch.h"
@@ -1243,7 +1244,6 @@ static void rswitch_adjust_link(struct net_device *ndev)
struct rswitch_device *rdev = netdev_priv(ndev);
struct phy_device *phydev = ndev->phydev;
/* Current hardware has a restriction not to change speed at runtime */
if (phydev->link != rdev->etha->link) {
phy_print_status(phydev);
if (phydev->link)
@@ -1252,13 +1252,23 @@ static void rswitch_adjust_link(struct net_device *ndev)
phy_power_off(rdev->serdes);
rdev->etha->link = phydev->link;
if (!rdev->priv->etha_no_runtime_change &&
phydev->speed != rdev->etha->speed) {
rdev->etha->speed = phydev->speed;
rswitch_etha_hw_init(rdev->etha, rdev->ndev->dev_addr);
phy_set_speed(rdev->serdes, rdev->etha->speed);
}
}
}
static void rswitch_phy_remove_link_mode(struct rswitch_device *rdev,
struct phy_device *phydev)
{
/* Current hardware has a restriction not to change speed at runtime */
if (!rdev->priv->etha_no_runtime_change)
return;
switch (rdev->etha->speed) {
case SPEED_2500:
phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Full_BIT);
@@ -1347,7 +1357,8 @@ static int rswitch_ether_port_init_one(struct rswitch_device *rdev)
err = rswitch_etha_hw_init(rdev->etha, rdev->ndev->dev_addr);
if (err < 0)
return err;
rdev->etha->operated = true;
if (rdev->priv->etha_no_runtime_change)
rdev->etha->operated = true;
}
err = rswitch_mii_register(rdev);
@@ -1853,8 +1864,14 @@ static int rswitch_init(struct rswitch_private *priv)
return err;
}
static const struct soc_device_attribute rswitch_soc_no_speed_change[] = {
{ .soc_id = "r8a779f0", .revision = "ES1.0" },
{ /* Sentinel */ }
};
static int renesas_eth_sw_probe(struct platform_device *pdev)
{
const struct soc_device_attribute *attr;
struct rswitch_private *priv;
struct resource *res;
int ret;
@@ -1869,6 +1886,10 @@ static int renesas_eth_sw_probe(struct platform_device *pdev)
if (!priv)
return -ENOMEM;
attr = soc_device_match(rswitch_soc_no_speed_change);
if (attr)
priv->etha_no_runtime_change = true;
priv->ptp_priv = rcar_gen4_ptp_alloc(pdev);
if (!priv->ptp_priv)
return -ENOMEM;

1
drivers/net/ethernet/renesas/rswitch.h
View File

@@ -1011,6 +1011,7 @@ struct rswitch_private {
struct rswitch_etha etha[RSWITCH_NUM_PORTS];
struct rswitch_mfwd mfwd;
bool etha_no_runtime_change;
bool gwca_halt;
};