From mboxrd@z Thu Jan 1 00:00:00 1970 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: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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-usbc-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 +#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, }; +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; struct tusb320_ops { @@ -67,6 +78,9 @@ static const char * const tusb_attached_states[] = { static const unsigned int tusb320_extcon_cable[] = { EXTCON_USB, EXTCON_USB_HOST, + EXTCON_CHG_USB_FAST, + EXTCON_CHG_USB_SLOW, + EXTCON_CHG_USB_PD, EXTCON_NONE, }; @@ -187,8 +201,8 @@ static struct tusb320_ops tusb320l_ops = { static irqreturn_t tusb320_irq_handler(int irq, void *dev_id) { struct tusb320_priv *priv = dev_id; - int state, polarity; - unsigned reg; + int state, polarity, current_mode; + unsigned int reg, reg8; 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); + if (regmap_read(priv->regmap, TUSB320_REG8, ®8)) { + dev_err(priv->dev, "error during i2c read!\n"); + return IRQ_NONE; + } + + current_mode = (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 == TUSB320_ATTACHED_STATE_UFP); extcon_set_state(priv->edev, EXTCON_USB_HOST, state == TUSB320_ATTACHED_STATE_DFP); + extcon_set_state(priv->edev, EXTCON_CHG_USB_SLOW, + current_mode == TUSB320_CURRENT_MODE_DETECT_ACCESSORY); + extcon_set_state(priv->edev, EXTCON_CHG_USB_FAST, + current_mode == TUSB320_CURRENT_MODE_DETECT_MEDIUM); + extcon_set_state(priv->edev, EXTCON_CHG_USB_PD, + current_mode == 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 *dev_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); priv->state = state; -- 2.20.1