linux-kernel - [PATCH v7 10/14] net: phy: at803x: parse qca8084 clocks and resets

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Message-ID: <20231214094813.24690-11-quic_luoj@quicinc.com>
Date:   Thu, 14 Dec 2023 17:48:09 +0800
From:   Luo Jie <quic_luoj@...cinc.com>
To:     <andrew@...n.ch>, <davem@...emloft.net>, <edumazet@...gle.com>,
        <kuba@...nel.org>, <pabeni@...hat.com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <hkallweit1@...il.com>, <linux@...linux.org.uk>, <corbet@....net>,
        <p.zabel@...gutronix.de>, <f.fainelli@...il.com>
CC:     <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>
Subject: [PATCH v7 10/14] net: phy: at803x: parse qca8084 clocks and resets

These clock and reset IDs are needed to bring up qca8084,
after the initializations with these clocks and resets,
the PHY function can be accessed correctly such as reading
the capabilities of PHY.

Signed-off-by: Luo Jie <quic_luoj@...cinc.com>
---
 drivers/net/phy/at803x.c | 89 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)

diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index a00c5950683c..6a7a7111ff68 100644
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -21,6 +21,8 @@
 #include <linux/phylink.h>
 #include <linux/sfp.h>
 #include <dt-bindings/net/qca-ar803x.h>
+#include <linux/clk.h>
+#include <linux/reset.h>
 
 #define AT803X_SPECIFIC_FUNCTION_CONTROL	0x10
 #define AT803X_SFC_ASSERT_CRS			BIT(11)
@@ -337,6 +339,31 @@ static struct at803x_hw_stat at803x_hw_stats[] = {
 	{ "eee_wake_errors", 0x16, GENMASK(15, 0), MMD},
 };
 
+enum {
+	SRDS0_SYS_CLK,
+	SRDS1_SYS_CLK,
+	GEPHY0_SYS_CLK,
+	GEPHY1_SYS_CLK,
+	GEPHY2_SYS_CLK,
+	GEPHY3_SYS_CLK,
+	QCA8084_CLK_CNT
+};
+
+enum {
+	SRDS0_SYS_RESET,
+	SRDS1_SYS_RESET,
+	GEPHY0_SYS_RESET,
+	GEPHY1_SYS_RESET,
+	GEPHY2_SYS_RESET,
+	GEPHY3_SYS_RESET,
+	GEPHY0_RESET,
+	GEPHY1_RESET,
+	GEPHY2_RESET,
+	GEPHY3_RESET,
+	GEPHY_DSP_RESET,
+	QCA8084_RESET_CNT,
+};
+
 struct at803x_priv {
 	int flags;
 	u16 clk_25m_reg;
@@ -348,6 +375,8 @@ struct at803x_priv {
 	struct regulator_dev *vddio_rdev;
 	struct regulator_dev *vddh_rdev;
 	u64 stats[ARRAY_SIZE(at803x_hw_stats)];
+	struct clk *clk[QCA8084_CLK_CNT];
+	struct reset_control *reset[QCA8084_RESET_CNT];
 };
 
 struct at803x_context {
@@ -359,6 +388,29 @@ struct at803x_context {
 	u16 led_control;
 };
 
+static const char *const qca8084_clock_name[QCA8084_CLK_CNT] = {
+	"srds0_sys",
+	"srds1_sys",
+	"gephy0_sys",
+	"gephy1_sys",
+	"gephy2_sys",
+	"gephy3_sys",
+};
+
+static const char *const qca8084_reset_name[QCA8084_RESET_CNT] = {
+	"srds0_sys",
+	"srds1_sys",
+	"gephy0_sys",
+	"gephy1_sys",
+	"gephy2_sys",
+	"gephy3_sys",
+	"gephy0_soft",
+	"gephy1_soft",
+	"gephy2_soft",
+	"gephy3_soft",
+	"gephy_dsp",
+};
+
 static int at803x_debug_reg_write(struct phy_device *phydev, u16 reg, u16 data)
 {
 	int ret;
@@ -1007,8 +1059,45 @@ static int qca8084_parse_and_set_phyaddr(struct phy_device *phydev)
 				  FIELD_PREP(QCA8084_PCS_ADDR2_MASK, addr[6]));
 }
 
+static int qca8084_parse_dt(struct phy_device *phydev)
+{
+	struct at803x_priv *priv;
+	int i;
+
+	priv = phydev->priv;
+	for (i = 0; i < QCA8084_CLK_CNT; i++) {
+		priv->clk[i] = devm_clk_get_optional(&phydev->mdio.dev,
+						     qca8084_clock_name[i]);
+		if (IS_ERR(priv->clk[i])) {
+			phydev_err(phydev, "failed to get the clock ID %s!\n",
+				   qca8084_clock_name[i]);
+
+			return PTR_ERR(priv->clk[i]);
+		}
+	}
+
+	for (i = 0; i < QCA8084_RESET_CNT; i++) {
+		priv->reset[i] = devm_reset_control_get_optional_exclusive(&phydev->mdio.dev,
+									   qca8084_reset_name[i]);
+		if (IS_ERR(priv->reset[i])) {
+			phydev_err(phydev, "failed to get the reset ID %s!\n",
+				   qca8084_reset_name[i]);
+
+			return PTR_ERR(priv->reset[i]);
+		}
+	}
+
+	return 0;
+}
+
 static int qca8084_probe(struct phy_device *phydev)
 {
+	int ret;
+
+	ret = qca8084_parse_dt(phydev);
+	if (ret)
+		return ret;
+
 	return qca8084_parse_and_set_phyaddr(phydev);
 }
 
-- 
2.42.0