From nobody Sat Apr 11 06:40:08 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 269A9C25B0E for ; Mon, 15 Aug 2022 09:05:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241529AbiHOJFV (ORCPT ); Mon, 15 Aug 2022 05:05:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54610 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241453AbiHOJE7 (ORCPT ); Mon, 15 Aug 2022 05:04:59 -0400 Received: from smtp1.axis.com (smtp1.axis.com [195.60.68.17]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E760020F6E for ; Mon, 15 Aug 2022 02:04:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axis.com; q=dns/txt; s=axis-central1; t=1660554288; x=1692090288; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=zt034/C45VJoSyl9XibRuMatY47BOXi19qHnJVO9/7o=; b=hMoBn8mmAQCTGt/Sek19gAqCwJwzVazF8m7jaLP755hvI89rbg3J2XF+ VjWGgJ8ZEGOz0I4Sg2xRvtXs6tKHdrpFlPiAP6bao9zniNAYhtx6Vxlrf SBzE5mE40zNgQ+aYWGvzyGJx+xD6M3nuarCncAHK2vfAxwkwhIgQPVVS4 YasDc3I+Xb7iwEC9HWQkVh6sd/9D0OLPthKbTfbuWPelz3Z2dPYtzhRzq TjKxubvxnNnNVaPVcupjOMWREglFhtrnsaWr+GyMxsQO6wbpl78hDLS4h msHPe4G984uWDhil0Si6uzLov3y6QM11gIea561zknfkKNVNLKbNi77hM g==; From: Surendranath Parimi To: MyungJoo Ham , Chanwoo Choi CC: , Surendranath Parimi , Subject: [PATCH] extcon: usbc-tusb320: Expose the charger type Date: Mon, 15 Aug 2022 11:04:27 +0200 Message-ID: <20220815090427.3205-1-surendranath.parimi@axis.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" In the UFP mode of operation, knowing the charger type helps to draw the appropriate amount of current from the charger. The charger type can be know by reading the current_mode_detect bits of register 0x08. Add support to expose the charger type. Signed-off-by: Surendranath Parimi --- drivers/extcon/extcon-usbc-tusb320.c | 37 ++++++++++++++++++++++++++-- 1 file changed, 35 insertions(+), 2 deletions(-) diff --git a/drivers/extcon/extcon-usbc-tusb320.c b/drivers/extcon/extcon-u= sbc-tusb320.c index 6ba3d89b106d..43f07efa3472 100644 --- a/drivers/extcon/extcon-usbc-tusb320.c +++ b/drivers/extcon/extcon-usbc-tusb320.c @@ -14,6 +14,10 @@ #include #include =20 +#define TUSB320_REG8 0x8 +#define TUSB320_REG8_CURRENT_MODE_DETECT_SHIFT 0x4 +#define TUSB320_REG8_CURRENT_MODE_DETECT_MASK 0x3 + #define TUSB320_REG9 0x9 #define TUSB320_REG9_ATTACHED_STATE_SHIFT 6 #define TUSB320_REG9_ATTACHED_STATE_MASK 0x3 @@ -42,6 +46,13 @@ enum tusb320_mode { TUSB320_MODE_DRP, }; =20 +enum tusb320_current_mode_detect { + TUSB320_CURRENT_MODE_DETECT_DEFAULT, + TUSB320_CURRENT_MODE_DETECT_MEDIUM, + TUSB320_CURRENT_MODE_DETECT_ACCESSORY, + TUSB320_CURRENT_MODE_DETECT_HIGH, +}; + struct tusb320_priv; =20 struct tusb320_ops { @@ -67,6 +78,9 @@ static const char * const tusb_attached_states[] =3D { static const unsigned int tusb320_extcon_cable[] =3D { EXTCON_USB, EXTCON_USB_HOST, + EXTCON_CHG_USB_FAST, + EXTCON_CHG_USB_SLOW, + EXTCON_CHG_USB_PD, EXTCON_NONE, }; =20 @@ -187,8 +201,8 @@ static struct tusb320_ops tusb320l_ops =3D { static irqreturn_t tusb320_irq_handler(int irq, void *dev_id) { struct tusb320_priv *priv =3D dev_id; - int state, polarity; - unsigned reg; + int state, polarity, current_mode; + unsigned int reg, reg8; =20 if (regmap_read(priv->regmap, TUSB320_REG9, ®)) { dev_err(priv->dev, "error during i2c read!\n"); @@ -205,10 +219,26 @@ static irqreturn_t tusb320_irq_handler(int irq, void = *dev_id) dev_dbg(priv->dev, "attached state: %s, polarity: %d\n", tusb_attached_states[state], polarity); =20 + if (regmap_read(priv->regmap, TUSB320_REG8, ®8)) { + dev_err(priv->dev, "error during i2c read!\n"); + return IRQ_NONE; + } + + current_mode =3D (reg8 >> TUSB320_REG8_CURRENT_MODE_DETECT_SHIFT) & + TUSB320_REG8_CURRENT_MODE_DETECT_MASK; + + dev_dbg(priv->dev, "current_mode:%d\n", current_mode); + extcon_set_state(priv->edev, EXTCON_USB, state =3D=3D TUSB320_ATTACHED_STATE_UFP); extcon_set_state(priv->edev, EXTCON_USB_HOST, state =3D=3D TUSB320_ATTACHED_STATE_DFP); + extcon_set_state(priv->edev, EXTCON_CHG_USB_SLOW, + current_mode =3D=3D TUSB320_CURRENT_MODE_DETECT_ACCESSORY); + extcon_set_state(priv->edev, EXTCON_CHG_USB_FAST, + current_mode =3D=3D TUSB320_CURRENT_MODE_DETECT_MEDIUM); + extcon_set_state(priv->edev, EXTCON_CHG_USB_PD, + current_mode =3D=3D TUSB320_CURRENT_MODE_DETECT_HIGH); extcon_set_property(priv->edev, EXTCON_USB, EXTCON_PROP_USB_TYPEC_POLARITY, (union extcon_property_value)polarity); @@ -217,6 +247,9 @@ static irqreturn_t tusb320_irq_handler(int irq, void *d= ev_id) (union extcon_property_value)polarity); extcon_sync(priv->edev, EXTCON_USB); extcon_sync(priv->edev, EXTCON_USB_HOST); + extcon_sync(priv->edev, EXTCON_CHG_USB_PD); + extcon_sync(priv->edev, EXTCON_CHG_USB_FAST); + extcon_sync(priv->edev, EXTCON_CHG_USB_SLOW); =20 priv->state =3D state; =20 --=20 2.20.1