linux-kernel - [PATCH v2 10/14] phy: cadence: Sierra: Change MAX

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Date:   Wed, 23 Oct 2019 18:27:31 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Rob Herring <robh+dt@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Roger Quadros <rogerq@...com>, Jyri Sarha <jsarha@...com>
CC:     Anil Varughese <aniljoy@...ence.com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: [PATCH v2 10/14] phy: cadence: Sierra: Change MAX_LANES of Sierra to 16

Sierra SERDES IP supports upto 16 lanes (though not all of it
will be enabled in a platform). Allow Sierra driver to support a
maximum of upto 16 lanes.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/phy/cadence/phy-cadence-sierra.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/cadence/phy-cadence-sierra.c b/drivers/phy/cadence/phy-cadence-sierra.c
index 82f7617b2dac..dd54a0ab89b7 100644
--- a/drivers/phy/cadence/phy-cadence-sierra.c
+++ b/drivers/phy/cadence/phy-cadence-sierra.c
@@ -139,7 +139,7 @@
 #define SIERRA_PHY_PLL_CFG				0xe
 
 #define SIERRA_MACRO_ID					0x00007364
-#define SIERRA_MAX_LANES				4
+#define SIERRA_MAX_LANES				16
 #define PLL_LOCK_TIME					100000
 
 static const struct reg_field macro_id_type =
@@ -197,6 +197,7 @@ struct cdns_sierra_phy {
 	struct regmap_field *pllctrl_lock[SIERRA_MAX_LANES];
 	struct clk *clk;
 	int nsubnodes;
+	u32 num_lanes;
 	bool autoconf;
 };
 
@@ -233,6 +234,18 @@ static struct regmap_config cdns_sierra_lane_cdb_config[] = {
 	SIERRA_LANE_CDB_REGMAP_CONF("1"),
 	SIERRA_LANE_CDB_REGMAP_CONF("2"),
 	SIERRA_LANE_CDB_REGMAP_CONF("3"),
+	SIERRA_LANE_CDB_REGMAP_CONF("4"),
+	SIERRA_LANE_CDB_REGMAP_CONF("5"),
+	SIERRA_LANE_CDB_REGMAP_CONF("6"),
+	SIERRA_LANE_CDB_REGMAP_CONF("7"),
+	SIERRA_LANE_CDB_REGMAP_CONF("8"),
+	SIERRA_LANE_CDB_REGMAP_CONF("9"),
+	SIERRA_LANE_CDB_REGMAP_CONF("10"),
+	SIERRA_LANE_CDB_REGMAP_CONF("11"),
+	SIERRA_LANE_CDB_REGMAP_CONF("12"),
+	SIERRA_LANE_CDB_REGMAP_CONF("13"),
+	SIERRA_LANE_CDB_REGMAP_CONF("14"),
+	SIERRA_LANE_CDB_REGMAP_CONF("15"),
 };
 
 static struct regmap_config cdns_sierra_common_cdb_config = {
@@ -546,6 +559,8 @@ static int cdns_sierra_phy_probe(struct platform_device *pdev)
 			}
 		}
 
+		sp->num_lanes += sp->phys[node].num_lanes;
+
 		gphy = devm_phy_create(dev, child, &ops);
 
 		if (IS_ERR(gphy)) {
@@ -559,6 +574,11 @@ static int cdns_sierra_phy_probe(struct platform_device *pdev)
 	}
 	sp->nsubnodes = node;
 
+	if (sp->num_lanes > SIERRA_MAX_LANES) {
+		dev_err(dev, "Invalid lane configuration\n");
+		goto put_child2;
+	}
+
 	/* If more than one subnode, configure the PHY as multilink */
 	if (!sp->autoconf && sp->nsubnodes > 1)
 		regmap_field_write(sp->phy_pll_cfg_1, 0x1);
-- 
2.17.1