From patchwork Wed Mar 4 06:42:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 11419373 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9D393191F for ; Wed, 4 Mar 2020 06:42:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 877222146E for ; Wed, 4 Mar 2020 06:42:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727595AbgCDGmV (ORCPT ); Wed, 4 Mar 2020 01:42:21 -0500 Received: from relmlor2.renesas.com ([210.160.252.172]:37535 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725773AbgCDGmU (ORCPT ); Wed, 4 Mar 2020 01:42:20 -0500 X-IronPort-AV: E=Sophos;i="5.70,513,1574089200"; d="scan'208";a="40717179" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 04 Mar 2020 15:42:18 +0900 Received: from localhost.localdomain (unknown [10.166.252.89]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 8B0B541CBB7A; Wed, 4 Mar 2020 15:42:18 +0900 (JST) From: Yoshihiro Shimoda To: geert+renesas@glider.be, mturquette@baylibre.com, sboyd@kernel.org, robh+dt@kernel.org Cc: linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH v4 4/4] clk: renesas: rcar-usb2-clock-sel: Add reset_control Date: Wed, 4 Mar 2020 15:42:17 +0900 Message-Id: <1583304137-28482-5-git-send-email-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1583304137-28482-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> References: <1583304137-28482-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org This hardware needs to deassert resets of both host and peripheral. So, this patch adds reset control. Signed-off-by: Yoshihiro Shimoda Reviewed-by: Geert Uytterhoeven --- drivers/clk/renesas/Kconfig | 1 + drivers/clk/renesas/rcar-usb2-clock-sel.c | 15 ++++++++++++++- 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig index 879d96e..ac2dd92 100644 --- a/drivers/clk/renesas/Kconfig +++ b/drivers/clk/renesas/Kconfig @@ -161,6 +161,7 @@ config CLK_RCAR_GEN3_CPG config CLK_RCAR_USB2_CLOCK_SEL bool "Renesas R-Car USB2 clock selector support" depends on ARCH_RENESAS || COMPILE_TEST + select RESET_CONTROLLER help This is a driver for R-Car USB2 clock selector diff --git a/drivers/clk/renesas/rcar-usb2-clock-sel.c b/drivers/clk/renesas/rcar-usb2-clock-sel.c index d5f47ab..d4c0298 100644 --- a/drivers/clk/renesas/rcar-usb2-clock-sel.c +++ b/drivers/clk/renesas/rcar-usb2-clock-sel.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #define USB20_CLKSET0 0x00 @@ -35,6 +36,7 @@ struct usb2_clock_sel_priv { void __iomem *base; struct clk_hw hw; struct clk_bulk_data clks[ARRAY_SIZE(rcar_usb2_clocks)]; + struct reset_control *rsts; bool extal; bool xtal; }; @@ -62,10 +64,16 @@ static int usb2_clock_sel_enable(struct clk_hw *hw) struct usb2_clock_sel_priv *priv = to_priv(hw); int ret; - ret = clk_bulk_prepare_enable(ARRAY_SIZE(priv->clks), priv->clks); + ret = reset_control_deassert(priv->rsts); if (ret) return ret; + ret = clk_bulk_prepare_enable(ARRAY_SIZE(priv->clks), priv->clks); + if (ret) { + reset_control_assert(priv->rsts); + return ret; + } + usb2_clock_sel_enable_extal_only(priv); return 0; @@ -78,6 +86,7 @@ static void usb2_clock_sel_disable(struct clk_hw *hw) usb2_clock_sel_disable_extal_only(priv); clk_bulk_disable_unprepare(ARRAY_SIZE(priv->clks), priv->clks); + reset_control_assert(priv->rsts); } /* @@ -151,6 +160,10 @@ static int rcar_usb2_clock_sel_probe(struct platform_device *pdev) if (ret < 0) return ret; + priv->rsts = devm_reset_control_array_get(dev, true, false); + if (IS_ERR(priv->rsts)) + return PTR_ERR(priv->rsts); + pm_runtime_enable(dev); pm_runtime_get_sync(dev);