diff options
| author | Kishon Vijay Abraham I <kishon@ti.com> | 2021-03-30 16:31:36 +0530 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-03-31 16:45:47 +0530 |
| commit | b69d39f6841965559afbc3ecb0e3a8366c8999e8 (patch) | |
| tree | 6f1d6818854c5d66882e8051ee4b32ebd9967d8b | |
| parent | d44b4bf49e0bc8f6195630eb9b397abb5bc162a8 (diff) | |
| download | linux-b69d39f6841965559afbc3ecb0e3a8366c8999e8.tar.bz2 | |
phy: cadence-torrent: Do not configure SERDES if it's already configured
Do not configure torrent SERDES if it's already configured.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Swapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/20210330110138.24356-4-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/phy/cadence/phy-cadence-torrent.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c index ab51c4bf7b30..5ee1657f5a1c 100644 --- a/drivers/phy/cadence/phy-cadence-torrent.c +++ b/drivers/phy/cadence/phy-cadence-torrent.c @@ -371,6 +371,10 @@ static const struct phy_ops cdns_torrent_phy_ops = { .owner = THIS_MODULE, }; +static const struct phy_ops noop_ops = { + .owner = THIS_MODULE, +}; + struct cdns_reg_pairs { u32 val; u32 off; @@ -2306,6 +2310,7 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev) struct device_node *child; int ret, subnodes, node = 0, i; u32 total_num_lanes = 0; + int already_configured; u8 init_dp_regmap = 0; u32 phy_type; @@ -2344,16 +2349,20 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev) if (ret) return ret; - ret = cdns_torrent_reset(cdns_phy); - if (ret) - goto clk_cleanup; + regmap_field_read(cdns_phy->phy_pma_cmn_ctrl_1, &already_configured); - ret = cdns_torrent_clk(cdns_phy); - if (ret) - goto clk_cleanup; + if (!already_configured) { + ret = cdns_torrent_reset(cdns_phy); + if (ret) + goto clk_cleanup; + + ret = cdns_torrent_clk(cdns_phy); + if (ret) + goto clk_cleanup; - /* Enable APB */ - reset_control_deassert(cdns_phy->apb_rst); + /* Enable APB */ + reset_control_deassert(cdns_phy->apb_rst); + } for_each_available_child_of_node(dev->of_node, child) { struct phy *gphy; @@ -2423,7 +2432,10 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev) of_property_read_u32(child, "cdns,ssc-mode", &cdns_phy->phys[node].ssc_mode); - gphy = devm_phy_create(dev, child, &cdns_torrent_phy_ops); + if (!already_configured) + gphy = devm_phy_create(dev, child, &cdns_torrent_phy_ops); + else + gphy = devm_phy_create(dev, child, &noop_ops); if (IS_ERR(gphy)) { ret = PTR_ERR(gphy); goto put_child; @@ -2507,7 +2519,7 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev) goto put_lnk_rst; } - if (cdns_phy->nsubnodes > 1) { + if (cdns_phy->nsubnodes > 1 && !already_configured) { ret = cdns_torrent_phy_configure_multilink(cdns_phy); if (ret) goto put_lnk_rst; |