From patchwork Thu Feb 14 16:32:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Brugger X-Patchwork-Id: 10813185 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B7F5E13B4 for ; Thu, 14 Feb 2019 16:33:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A3DD22EDB9 for ; Thu, 14 Feb 2019 16:33:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 96C4D2EDCD; Thu, 14 Feb 2019 16:33:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 302322EDB9 for ; Thu, 14 Feb 2019 16:33:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=kJq9krloq6ccSN+X3rkpkwCkD91rmIpC6EArVigvipg=; b=jl1Q+8qsjtjedr OEOAcZVjZT1VMpPX00AT8h8GMALHkEevjdk8GaUyghmYJpIoY5aeTMDtF4Qddt9IP/3U6mdTjK4Zk wmURSxSZ/7uq+GgRYEUWIEcC/GwJpZpUnJfIxLeq8BlFRAb/0lUquQMaDKFXGyO2F/WlVvg96hNyw 8Xg0myeXchQnF22PNKAHsiDrp/8eP2fzmP0NA2NkFuaT1qoA+Yd1EkH0ukf+k+TcczK3GO1dc689n uRgewQmjvLrOl2JLzp8euLxW3mcPwDHf9S+4SOncl+P0l7l8mgrnPQqIyZIW5JihbGv+ONsybp1cE vbFwVZPhQd4VbxxJ2s0w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1guJwx-0003nv-4a; Thu, 14 Feb 2019 16:33:23 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1guJwN-0003Jy-W7; Thu, 14 Feb 2019 16:32:58 +0000 Received: from ziggy.de (unknown [37.223.146.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 68C56222DA; Thu, 14 Feb 2019 16:32:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550161967; bh=m77rE7/wMUd1pn8crd6Ug8AEy5PbTKoRD6tBjs4D088=; h=From:To:Cc:Subject:Date:From; b=MPtecKHYHkXnHw4qVA2WnXh/V8ahPRHPR5KVs8d77X0dhofI+H6S7YWsvUFcseVHX Fb7tkXAfjKNNdje21jRFx4Ol/aLkOuw7ZuGASOJ0gvxOrSsaM36fJfX5nb3Pop82c3 tDVQdpV84ssBnw4Ee816Aslgk+PVvPF9pqYDF5nI= From: matthias.bgg@kernel.org To: mturquette@baylibre.com, sboyd@kernel.org, kevin-cw.chen@mediatek.com, mars.cheng@mediatek.com Subject: [PATCH v4 3/3] clk: mediatek: Mark bus and DRAM related clocks as critical Date: Thu, 14 Feb 2019 17:32:42 +0100 Message-Id: <20190214163242.26259-1-matthias.bgg@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190214_083248_523325_E008C002 X-CRM114-Status: GOOD ( 10.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sean.wang@mediatek.com, linux-kernel@vger.kernel.org, jasu@njomotys.info, matthias.bgg@gmail.com, linux-mediatek@lists.infradead.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jasper Mattsson Currently, DRAM-related clocks are not marked with CLK_IS_CRITICAL for MT6797. This causes memory corruption when the system is booted without clk_ignore_unused. This patch marks MUX ddrphycfg_sel as well as gates infra_dramc_f26m and infra_dramc_b_f26m as CLK_IS_CRITICAL. Signed-off-by: Jasper Mattsson Signed-off-by: Matthias Brugger Acked-by:Mars Cheng --- drivers/clk/mediatek/clk-mt6797.c | 68 +++++++++++++++++++------------ 1 file changed, 43 insertions(+), 25 deletions(-) diff --git a/drivers/clk/mediatek/clk-mt6797.c b/drivers/clk/mediatek/clk-mt6797.c index 5702bc974ed9..c2b46b184b9a 100644 --- a/drivers/clk/mediatek/clk-mt6797.c +++ b/drivers/clk/mediatek/clk-mt6797.c @@ -324,6 +324,10 @@ static const char * const anc_md32_parents[] = { "univpll_d5", }; +/* + * Clock mux ddrphycfg is needed by the DRAM controller. We mark it as + * critical as otherwise the system will hang after boot. + */ static const struct mtk_composite top_muxes[] = { MUX(CLK_TOP_MUX_ULPOSC_AXI_CK_MUX_PRE, "ulposc_axi_ck_mux_pre", ulposc_axi_ck_mux_pre_parents, 0x0040, 3, 1), @@ -331,8 +335,8 @@ static const struct mtk_composite top_muxes[] = { ulposc_axi_ck_mux_parents, 0x0040, 2, 1), MUX(CLK_TOP_MUX_AXI, "axi_sel", axi_parents, 0x0040, 0, 2), - MUX(CLK_TOP_MUX_DDRPHYCFG, "ddrphycfg_sel", ddrphycfg_parents, - 0x0040, 16, 2), + MUX_FLAGS(CLK_TOP_MUX_DDRPHYCFG, "ddrphycfg_sel", ddrphycfg_parents, + 0x0040, 16, 2, CLK_IS_CRITICAL | CLK_SET_RATE_PARENT), MUX(CLK_TOP_MUX_MM, "mm_sel", mm_parents, 0x0040, 24, 2), MUX_GATE(CLK_TOP_MUX_PWM, "pwm_sel", pwm_parents, 0x0050, 0, 3, 7), @@ -424,33 +428,45 @@ static const struct mtk_gate_regs infra2_cg_regs = { .sta_ofs = 0x00b0, }; -#define GATE_ICG0(_id, _name, _parent, _shift) { \ - .id = _id, \ - .name = _name, \ - .parent_name = _parent, \ - .regs = &infra0_cg_regs, \ - .shift = _shift, \ - .ops = &mtk_clk_gate_ops_setclr, \ +#define GATE_ICG0(_id, _name, _parent, _shift) { \ + .id = _id, \ + .name = _name, \ + .parent_name = _parent, \ + .regs = &infra0_cg_regs, \ + .shift = _shift, \ + .ops = &mtk_clk_gate_ops_setclr, \ } -#define GATE_ICG1(_id, _name, _parent, _shift) { \ - .id = _id, \ - .name = _name, \ - .parent_name = _parent, \ - .regs = &infra1_cg_regs, \ - .shift = _shift, \ - .ops = &mtk_clk_gate_ops_setclr, \ +#define GATE_ICG1(_id, _name, _parent, _shift) \ + GATE_ICG1_FLAGS(_id, _name, _parent, _shift, 0) + +#define GATE_ICG1_FLAGS(_id, _name, _parent, _shift, _flags) { \ + .id = _id, \ + .name = _name, \ + .parent_name = _parent, \ + .regs = &infra1_cg_regs, \ + .shift = _shift, \ + .ops = &mtk_clk_gate_ops_setclr, \ + .flags = _flags, \ } -#define GATE_ICG2(_id, _name, _parent, _shift) { \ - .id = _id, \ - .name = _name, \ - .parent_name = _parent, \ - .regs = &infra2_cg_regs, \ - .shift = _shift, \ - .ops = &mtk_clk_gate_ops_setclr, \ +#define GATE_ICG2(_id, _name, _parent, _shift) \ + GATE_ICG2_FLAGS(_id, _name, _parent, _shift, 0) + +#define GATE_ICG2_FLAGS(_id, _name, _parent, _shift, _flags) { \ + .id = _id, \ + .name = _name, \ + .parent_name = _parent, \ + .regs = &infra2_cg_regs, \ + .shift = _shift, \ + .ops = &mtk_clk_gate_ops_setclr, \ + .flags = _flags, \ } +/* + * Clock gates dramc and dramc_b are needed by the DRAM controller. + * We mark them as critical as otherwise the system will hang after boot. + */ static const struct mtk_gate infra_clks[] = { GATE_ICG0(CLK_INFRA_PMIC_TMR, "infra_pmic_tmr", "ulposc", 0), GATE_ICG0(CLK_INFRA_PMIC_AP, "infra_pmic_ap", "pmicspi_sel", 1), @@ -505,7 +521,8 @@ static const struct mtk_gate infra_clks[] = { GATE_ICG1(CLK_INFRA_CCIF_AP, "infra_ccif_ap", "axi_sel", 23), GATE_ICG1(CLK_INFRA_AUDIO, "infra_audio", "axi_sel", 25), GATE_ICG1(CLK_INFRA_CCIF_MD, "infra_ccif_md", "axi_sel", 26), - GATE_ICG1(CLK_INFRA_DRAMC_F26M, "infra_dramc_f26m", "clk26m", 31), + GATE_ICG1_FLAGS(CLK_INFRA_DRAMC_F26M, "infra_dramc_f26m", + "clk26m", 31, CLK_IS_CRITICAL), GATE_ICG2(CLK_INFRA_I2C4, "infra_i2c4", "axi_sel", 0), GATE_ICG2(CLK_INFRA_I2C_APPM, "infra_i2c_appm", "axi_sel", 1), GATE_ICG2(CLK_INFRA_I2C_GPUPM, "infra_i2c_gpupm", "axi_sel", 2), @@ -516,7 +533,8 @@ static const struct mtk_gate infra_clks[] = { GATE_ICG2(CLK_INFRA_I2C5, "infra_i2c5", "axi_sel", 7), GATE_ICG2(CLK_INFRA_SYS_CIRQ, "infra_sys_cirq", "axi_sel", 8), GATE_ICG2(CLK_INFRA_SPI1, "infra_spi1", "spi_sel", 10), - GATE_ICG2(CLK_INFRA_DRAMC_B_F26M, "infra_dramc_b_f26m", "clk26m", 11), + GATE_ICG2_FLAGS(CLK_INFRA_DRAMC_B_F26M, "infra_dramc_b_f26m", + "clk26m", 11, CLK_IS_CRITICAL), GATE_ICG2(CLK_INFRA_ANC_MD32, "infra_anc_md32", "anc_md32_sel", 12), GATE_ICG2(CLK_INFRA_ANC_MD32_32K, "infra_anc_md32_32k", "clk26m", 13), GATE_ICG2(CLK_INFRA_DVFS_SPM1, "infra_dvfs_spm1", "axi_sel", 15),