diff options
| author | Swapnil Jakhade <sjakhade@cadence.com> | 2020-09-17 09:30:36 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-09-18 07:17:19 +0200 |
| commit | 15c6a048e5f00af108fb9f9e56ca5bd38e11b1a6 (patch) | |
| tree | ec3f57007eafb29771cfda71acaf0ba045eba899 /drivers/phy | |
| parent | phy: cadence-torrent: Check cmn_ready assertion during PHY power on (diff) | |
| download | linux-15c6a048e5f00af108fb9f9e56ca5bd38e11b1a6.tar.xz linux-15c6a048e5f00af108fb9f9e56ca5bd38e11b1a6.zip | |
phy: cadence-torrent: Add PHY APB reset support
Add support for PHY APB reset and make it optional.
Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-4-git-send-email-sjakhade@cadence.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/cadence/phy-cadence-torrent.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c index 9e900f389b08..1d0c9bb7cfa0 100644 --- a/drivers/phy/cadence/phy-cadence-torrent.c +++ b/drivers/phy/cadence/phy-cadence-torrent.c @@ -228,6 +228,7 @@ struct cdns_torrent_phy { void __iomem *sd_base; /* SD0801 registers base */ u32 max_bit_rate; /* Maximum link bit rate to use (in Mbps) */ struct reset_control *phy_rst; + struct reset_control *apb_rst; struct device *dev; struct clk *clk; unsigned long ref_clk_rate; @@ -1883,6 +1884,13 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev) return PTR_ERR(cdns_phy->phy_rst); } + cdns_phy->apb_rst = devm_reset_control_get_optional(dev, "torrent_apb"); + if (IS_ERR(cdns_phy->apb_rst)) { + dev_err(dev, "%s: failed to get apb reset\n", + dev->of_node->full_name); + return PTR_ERR(cdns_phy->apb_rst); + } + cdns_phy->clk = devm_clk_get(dev, "refclk"); if (IS_ERR(cdns_phy->clk)) { dev_err(dev, "phy ref clock not found\n"); @@ -1907,6 +1915,9 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev) if (ret) return ret; + /* Enable APB */ + reset_control_deassert(cdns_phy->apb_rst); + for_each_available_child_of_node(dev->of_node, child) { struct phy *gphy; @@ -2059,6 +2070,7 @@ put_lnk_rst: for (i = 0; i < node; i++) reset_control_put(cdns_phy->phys[i].lnk_rst); of_node_put(child); + reset_control_assert(cdns_phy->apb_rst); return ret; } @@ -2068,6 +2080,7 @@ static int cdns_torrent_phy_remove(struct platform_device *pdev) int i; reset_control_assert(cdns_phy->phy_rst); + reset_control_assert(cdns_phy->apb_rst); for (i = 0; i < cdns_phy->nsubnodes; i++) { reset_control_assert(cdns_phy->phys[i].lnk_rst); reset_control_put(cdns_phy->phys[i].lnk_rst); |