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From:   Gene Chen <gene.chen.richtek@gmail.com>
To:     linux@roeck-us.net, heikki.krogerus@linux.intel.com,
        gregkh@linuxfoundation.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org
Cc:     linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org, gene_chen@richtek.com,
        cy_huang@richtek.com
Subject: [PATCH v3 4/7] usb: typec: tcpci_rt1711h: Add initial phy setting
Date:   Mon,  1 Aug 2022 18:14:44 +0800
Message-Id: <20220801101447.86207-5-gene.chen.richtek@gmail.com>
In-Reply-To: <20220801101447.86207-1-gene.chen.richtek@gmail.com>
References: <20220801101447.86207-1-gene.chen.richtek@gmail.com>
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From: Gene Chen <gene_chen@richtek.com>

Add initial phy setting about phy dicard retry,
rx filter deglitech time and BMC-encoded wait time

Signed-off-by: Gene Chen <gene_chen@richtek.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/usb/typec/tcpm/tcpci_rt1711h.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
index df7bfe299987..33d8ea95b7c1 100644
--- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c
+++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
@@ -20,6 +20,9 @@
 #define RT1711H_VID		0x29CF
 #define RT1711H_PID		0x1711
 
+#define RT1711H_PHYCTRL1	0x80
+#define RT1711H_PHYCTRL2	0x81
+
 #define RT1711H_RTCTRL8		0x9B
 
 /* Autoidle timeout = (tout * 2 + 1) * 6.4ms */
@@ -107,8 +110,18 @@ static int rt1711h_init(struct tcpci *tcpci, struct tcpci_data *tdata)
 		return ret;
 
 	/* dcSRC.DRP : 33% */
-	return rt1711h_write16(chip, RT1711H_RTCTRL16, 330);
+	ret = rt1711h_write16(chip, RT1711H_RTCTRL16, 330);
+	if (ret < 0)
+		return ret;
+
+	/* Enable phy discard retry, retry count 7, rx filter deglitech 100 us */
+	ret = rt1711h_write8(chip, RT1711H_PHYCTRL1, 0xF1);
+	if (ret < 0)
+		return ret;
 
+	/* Decrease wait time of BMC-encoded 1 bit from 2.67us to 2.55us */
+	/* wait time : (val * .4167) us */
+	return rt1711h_write8(chip, RT1711H_PHYCTRL2, 62);
 }
 
 static int rt1711h_set_vbus(struct tcpci *tcpci, struct tcpci_data *tdata,
-- 
2.25.1