linux-kernel - [PATCH v2 10/14] phy: cadence: sierra: Enable pll_cmnlc and pll

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Message-ID: <20201222070520.28132-11-kishon@ti.com>
Date:   Tue, 22 Dec 2020 12:35:16 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Swapnil Jakhade <sjakhade@...ence.com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     Nishanth Menon <nm@...com>, Philipp Zabel <p.zabel@...gutronix.de>
Subject: [PATCH v2 10/14] phy: cadence: sierra: Enable pll_cmnlc and pll_cmnlc1 clocks

Get pll_cmnlc and pll_cmnlc1 optional clocks and enable them.
This will enable REFRCV/1 in case the pll_cmnlc/1 takes input
from REFRCV/1 respectively.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/phy/cadence/phy-cadence-sierra.c | 56 +++++++++++++++++++++++-
 1 file changed, 54 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/cadence/phy-cadence-sierra.c b/drivers/phy/cadence/phy-cadence-sierra.c
index 2a509be80c80..553971683f2d 100644
--- a/drivers/phy/cadence/phy-cadence-sierra.c
+++ b/drivers/phy/cadence/phy-cadence-sierra.c
@@ -267,6 +267,8 @@ struct cdns_sierra_phy {
 	struct clk *clk;
 	struct clk *cmn_refclk_dig_div;
 	struct clk *cmn_refclk1_dig_div;
+	struct clk *pll_cmnlc;
+	struct clk *pll_cmnlc1;
 	int nsubnodes;
 	u32 num_lanes;
 	bool autoconf;
@@ -874,9 +876,59 @@ static int cdns_sierra_phy_get_clocks(struct cdns_sierra_phy *sp,
 	}
 	sp->cmn_refclk1_dig_div = clk;
 
+	clk = devm_clk_get_optional(dev, "pll_cmnlc");
+	if (IS_ERR(clk)) {
+		dev_err(dev, "pll_cmnlc clock not found\n");
+		ret = PTR_ERR(clk);
+		return ret;
+	}
+	sp->pll_cmnlc = clk;
+
+	clk = devm_clk_get_optional(dev, "pll_cmnlc1");
+	if (IS_ERR(clk)) {
+		dev_err(dev, "pll_cmnlc1 clock not found\n");
+		ret = PTR_ERR(clk);
+		return ret;
+	}
+	sp->pll_cmnlc1 = clk;
+
 	return 0;
 }
 
+static int cdns_sierra_phy_enable_clocks(struct cdns_sierra_phy *sp)
+{
+	int ret;
+
+	ret = clk_prepare_enable(sp->clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(sp->pll_cmnlc);
+	if (ret)
+		goto err_pll_cmnlc;
+
+	ret = clk_prepare_enable(sp->pll_cmnlc1);
+	if (ret)
+		goto err_pll_cmnlc1;
+
+	return 0;
+
+err_pll_cmnlc:
+	clk_disable_unprepare(sp->clk);
+
+err_pll_cmnlc1:
+	clk_disable_unprepare(sp->pll_cmnlc);
+
+	return 0;
+}
+
+static void cdns_sierra_phy_disable_clocks(struct cdns_sierra_phy *sp)
+{
+	clk_disable_unprepare(sp->pll_cmnlc1);
+	clk_disable_unprepare(sp->pll_cmnlc);
+	clk_disable_unprepare(sp->clk);
+}
+
 static int cdns_sierra_phy_get_resets(struct cdns_sierra_phy *sp,
 				      struct device *dev)
 {
@@ -961,7 +1013,7 @@ static int cdns_sierra_phy_probe(struct platform_device *pdev)
 	if (ret)
 		goto unregister_pll_mux;
 
-	ret = clk_prepare_enable(sp->clk);
+	ret = cdns_sierra_phy_enable_clocks(sp);
 	if (ret)
 		goto unregister_pll_mux;
 
@@ -1038,7 +1090,7 @@ static int cdns_sierra_phy_probe(struct platform_device *pdev)
 		reset_control_put(sp->phys[i].lnk_rst);
 	of_node_put(child);
 clk_disable:
-	clk_disable_unprepare(sp->clk);
+	cdns_sierra_phy_disable_clocks(sp);
 	reset_control_assert(sp->apb_rst);
 unregister_pll_mux:
 	cdns_sierra_pll_mux_unregister(sp, dn);
-- 
2.17.1