From patchwork Mon Nov 14 11:15:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13042137 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 5E232C3A5A7 for ; Mon, 14 Nov 2022 11:18:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236435AbiKNLSZ (ORCPT ); Mon, 14 Nov 2022 06:18:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43074 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236966AbiKNLR1 (ORCPT ); Mon, 14 Nov 2022 06:17:27 -0500 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::223]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BD9E321E15; Mon, 14 Nov 2022 03:15:28 -0800 (PST) Received: (Authenticated sender: herve.codina@bootlin.com) by mail.gandi.net (Postfix) with ESMTPA id 79CDA60010; Mon, 14 Nov 2022 11:15:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1668424527; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=9cWUMqDjvAHZdUQxoiw0zECZSqsjwWcZqSuQI2RSbWA=; b=ZybhulNlYT1pNvqmEey2XL1wO+TYkEWwGd+yGtJuqzYNp79OeRp7b9Plcn1uLKsv+cEsqW IGb0QgNytpqoA3fJ9buEWJkQLTaxooraYKXIlHyDSHKaxgGiDGTAsQ7N6phHBwOG54bJgS c7MTZUZ2+sw1OVr/cueK8OsKzWJb3B4ZsgqjOndC7iM8+IADPL+1sQpJmNKIpGOQ1zNqXB VFljSe76rWgPjja+giwJJJCLa/zwwJWoQV4+amHSXRXWnr/YGicLahr7Rl9QmmnxVwETSo Gc9SRryQbHsFEJUH+9y2m9hvgipmz6l9YTmSKTgRIjdEjwjXDaFPQ5WrvtSMkg== From: Herve Codina To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Herve Codina , Greg Kroah-Hartman , Magnus Damm , Gareth Williams Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v2 1/7] soc: renesas: r9a06g032-sysctrl: Export function to get the usb role Date: Mon, 14 Nov 2022 12:15:07 +0100 Message-Id: <20221114111513.1436165-2-herve.codina@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221114111513.1436165-1-herve.codina@bootlin.com> References: <20221114111513.1436165-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The usb role retrieved is determined from the CFG_USB[H2MODE] value. The CFG_USB register is located within the system controller. We need a helper to get the usb role based on H2MODE value from the CFG_USB register without syscon. Signed-off-by: Herve Codina Reviewed-by: Geert Uytterhoeven --- drivers/clk/renesas/r9a06g032-clocks.c | 18 ++++++++++++++++++ include/linux/soc/renesas/r9a06g032-sysctrl.h | 2 ++ 2 files changed, 20 insertions(+) diff --git a/drivers/clk/renesas/r9a06g032-clocks.c b/drivers/clk/renesas/r9a06g032-clocks.c index 1488c9d6e639..9ee056498714 100644 --- a/drivers/clk/renesas/r9a06g032-clocks.c +++ b/drivers/clk/renesas/r9a06g032-clocks.c @@ -23,8 +23,11 @@ #include #include #include +#include #include +#define R9A06G032_SYSCTRL_USB 0x00 +#define R9A06G032_SYSCTRL_USB_H2MODE (1<<1) #define R9A06G032_SYSCTRL_DMAMUX 0xA0 struct r9a06g032_gate { @@ -341,6 +344,21 @@ int r9a06g032_sysctrl_set_dmamux(u32 mask, u32 val) } EXPORT_SYMBOL_GPL(r9a06g032_sysctrl_set_dmamux); + +/* Exported helper to get the H2MODE bit from USB register */ +int r9a06g032_sysctrl_get_usb_role(void) +{ + u32 usb; + + if (!sysctrl_priv) + return -EPROBE_DEFER; + + usb = readl(sysctrl_priv->reg + R9A06G032_SYSCTRL_USB); + return (usb & R9A06G032_SYSCTRL_USB_H2MODE) ? + USB_ROLE_HOST : USB_ROLE_DEVICE; +} +EXPORT_SYMBOL_GPL(r9a06g032_sysctrl_get_usb_role); + /* register/bit pairs are encoded as an uint16_t */ static void clk_rdesc_set(struct r9a06g032_priv *clocks, diff --git a/include/linux/soc/renesas/r9a06g032-sysctrl.h b/include/linux/soc/renesas/r9a06g032-sysctrl.h index 066dfb15cbdd..fc18d013a498 100644 --- a/include/linux/soc/renesas/r9a06g032-sysctrl.h +++ b/include/linux/soc/renesas/r9a06g032-sysctrl.h @@ -4,8 +4,10 @@ #ifdef CONFIG_CLK_R9A06G032 int r9a06g032_sysctrl_set_dmamux(u32 mask, u32 val); +int r9a06g032_sysctrl_get_usb_role(void); #else static inline int r9a06g032_sysctrl_set_dmamux(u32 mask, u32 val) { return -ENODEV; } +static inline int r9a06g032_sysctrl_get_usb_role(void) { return -ENODEV; } #endif #endif /* __LINUX_SOC_RENESAS_R9A06G032_SYSCTRL_H__ */