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phy: cadence-torrent: restore parent clock for refclk during resume

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While suspend and resume, parent clock config for refclk was getting lost.
So save and restore it in suspend and resume operations.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Thomas Richard (TI.com) <thomas.richard@bootlin.com>
Link: https://patch.msgid.link/20251216-phy-cadence-torrent-resume-restore-refclk-parent-v3-1-8a7ed84b47e3@bootlin.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Thomas Richard (TI.com)
2025-12-16 15:24:25 +01:00
committed by Vinod Koul
parent 53f6240e88
commit 434e1a0ee1
1 changed files with 23 additions and 0 deletions
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23
drivers/phy/cadence/phy-cadence-torrent.c
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@@ -397,6 +397,7 @@ struct cdns_torrent_refclk_driver {
struct clk_hw hw;
struct regmap_field *cmn_fields[REFCLK_OUT_NUM_CMN_CONFIG];
struct clk_init_data clk_data;
u8 parent_index;
};
#define to_cdns_torrent_refclk_driver(_hw) \
@@ -3326,11 +3327,29 @@ static const struct cdns_torrent_vals sgmii_qsgmii_xcvr_diag_ln_vals = {
.num_regs = ARRAY_SIZE(sgmii_qsgmii_xcvr_diag_ln_regs),
};
static void cdns_torrent_refclk_driver_suspend(struct cdns_torrent_phy *cdns_phy)
{
struct clk_hw *hw = cdns_phy->clk_hw_data->hws[CDNS_TORRENT_REFCLK_DRIVER];
struct cdns_torrent_refclk_driver *refclk_driver = to_cdns_torrent_refclk_driver(hw);
refclk_driver->parent_index = cdns_torrent_refclk_driver_get_parent(hw);
}
static int cdns_torrent_refclk_driver_resume(struct cdns_torrent_phy *cdns_phy)
{
struct clk_hw *hw = cdns_phy->clk_hw_data->hws[CDNS_TORRENT_REFCLK_DRIVER];
struct cdns_torrent_refclk_driver *refclk_driver = to_cdns_torrent_refclk_driver(hw);
return cdns_torrent_refclk_driver_set_parent(hw, refclk_driver->parent_index);
}
static int cdns_torrent_phy_suspend_noirq(struct device *dev)
{
struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(dev);
int i;
cdns_torrent_refclk_driver_suspend(cdns_phy);
reset_control_assert(cdns_phy->phy_rst);
reset_control_assert(cdns_phy->apb_rst);
for (i = 0; i < cdns_phy->nsubnodes; i++)
@@ -3352,6 +3371,10 @@ static int cdns_torrent_phy_resume_noirq(struct device *dev)
int node = cdns_phy->nsubnodes;
int ret, i;
ret = cdns_torrent_refclk_driver_resume(cdns_phy);
if (ret)
return ret;
ret = cdns_torrent_clk(cdns_phy);
if (ret)
return ret;