From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: Anand Moon <linux.amoon@gmail.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>,
Vinod Koul <vkoul@kernel.org>,
Neil Armstrong <narmstrong@baylibre.com>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
linux-phy@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [RFCv1 4/8] phy: amlogic: meson8b-usb2: Use phy set_mode callback function
Date: Fri, 18 Jun 2021 00:16:06 +0200 [thread overview]
Message-ID: <CAFBinCB1rrmJ5=M0tSGS_47BarFcrs2Kz5qFzrHw8+OEYxX3DA@mail.gmail.com> (raw)
In-Reply-To: <20210617194154.2397-5-linux.amoon@gmail.com>
Hi Anand,
On Thu, Jun 17, 2021 at 9:43 PM Anand Moon <linux.amoon@gmail.com> wrote:
>
> Reorder the code for phy set_mode in .set_mode callback function.
> For now configure the phy in host mode.
as mentioned in the cover-letter: to my knowledge these register bits
are "static"
The settings for dr_mode == USB_DR_MODE_HOST mainly apply to the
second PHY (usb1_phy)
[...]
> +static int phy_meson8b_usb2_setmode(struct phy *phy, enum phy_mode mode,
> + int submode)
> {
> struct phy_meson8b_usb2_priv *priv = phy_get_drvdata(phy);
> u32 reg;
>
> + switch (mode) {
> + case PHY_MODE_USB_HOST:
> + if (priv->match->host_enable_aca) {
> + regmap_update_bits(priv->regmap, REG_ADP_BC,
> + REG_ADP_BC_ACA_ENABLE,
> + REG_ADP_BC_ACA_ENABLE);
> +
> + udelay(ACA_ENABLE_COMPLETE_TIME);
> +
> + regmap_read(priv->regmap, REG_ADP_BC, ®);
> + if (reg & REG_ADP_BC_ACA_PIN_FLOAT) {
> + dev_warn(&phy->dev, "USB ID detect failed!\n");
> + return -EINVAL;
> + }
> + }
> + break;
> + default:
> + dev_warn(&phy->dev, "USB ID detect failed to setnode! %d\n", mode);
> + return -EINVAL;
I have tested this driver already with PHY_MODE_USB_DEVICE (on my
Odroid-C1) so I don't see why we should drop support for this
Also if we want runtime mode switching in this driver then we would
need to undo the changes from "case PHY_MODE_USB_HOST" above
I suggest dropping this patch until we know for sure if and which
registers need to be updated based on the DR mode.
Best regards,
Martin
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next prev parent reply other threads:[~2021-06-17 22:17 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-17 19:41 [RFCv1 0/8] Meson-8b and Meson-gxbb USB phy code re-structure Anand Moon
2021-06-17 19:41 ` [RFCv1 1/8] phy: amlogic: meson8b-usb2: Use clock bulk to get clocks for phy Anand Moon
2021-06-17 22:33 ` Martin Blumenstingl
2021-06-18 15:32 ` Anand Moon
2021-06-17 19:41 ` [RFCv1 2/8] phy: amlogic: meson8b-usb2: Use phy init callback function Anand Moon
2021-06-18 12:26 ` Martin Blumenstingl
2021-06-18 13:17 ` Anand Moon
2021-06-17 19:41 ` [RFCv1 3/8] phy: amlogic: meson8b-usb2: Use phy exit " Anand Moon
2021-06-17 19:41 ` [RFCv1 4/8] phy: amlogic: meson8b-usb2: Use phy set_mode " Anand Moon
2021-06-17 22:16 ` Martin Blumenstingl [this message]
2021-06-18 13:19 ` Anand Moon
2021-06-18 20:01 ` Martin Blumenstingl
2021-06-21 7:20 ` Anand Moon
2021-06-22 20:27 ` Martin Blumenstingl
2021-06-17 19:41 ` [RFCv1 5/8] phy: amlogic: meson8b-usb2: Reorder phy poweroff " Anand Moon
2021-06-17 22:16 ` Martin Blumenstingl
2021-06-18 15:33 ` Anand Moon
2021-06-17 19:41 ` [RFCv1 6/8] phy: amlogic: meson8b-usb2: Use phy reset " Anand Moon
2021-06-17 22:24 ` Martin Blumenstingl
2021-06-18 15:33 ` Anand Moon
2021-06-18 20:06 ` Martin Blumenstingl
2021-06-21 7:15 ` Anand Moon
2021-06-22 20:11 ` Martin Blumenstingl
2021-06-24 14:54 ` Anand Moon
2021-06-27 20:07 ` Anand Moon
2021-06-27 20:25 ` Martin Blumenstingl
2021-07-02 19:13 ` Anand Moon
2021-06-17 19:41 ` [RFCv1 7/8] phy: amlogic: meson8b-usb2: Power off the PHY by putting it into reset mode Anand Moon
2021-06-17 22:37 ` Martin Blumenstingl
2021-06-21 7:15 ` Anand Moon
2021-06-22 20:00 ` Martin Blumenstingl
2021-06-17 19:41 ` [RFCv1 8/8] phy: amlogic: meson8b-usb2: don't log an error on -EPROBE_DEFER Anand Moon
2021-06-17 22:26 ` Martin Blumenstingl
2021-06-17 22:11 ` [RFCv1 0/8] Meson-8b and Meson-gxbb USB phy code re-structure Martin Blumenstingl
2021-06-18 13:20 ` Anand Moon
2021-06-18 20:16 ` Martin Blumenstingl
2021-06-21 7:21 ` Anand Moon
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