From patchwork Mon May 14 21:16:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 10399337 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E8D7A600D2 for ; Mon, 14 May 2018 21:18:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5ECE62851D for ; Mon, 14 May 2018 21:18:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 53D8328526; Mon, 14 May 2018 21:18:38 +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=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E2DAC28521 for ; Mon, 14 May 2018 21:18:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752246AbeENVSW (ORCPT ); Mon, 14 May 2018 17:18:22 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:34410 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752101AbeENVQh (ORCPT ); Mon, 14 May 2018 17:16:37 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id DFADB262027 From: Enric Balletbo i Serra To: MyungJoo Ham , Kyungmin Park , Chanwoo Choi , Rob Herring , Will Deacon , Heiko Stuebner , Michael Turquette , Stephen Boyd , Sandy Huang , David Airlie Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Derek Basehore , linux-clk@vger.kernel.org, linux-rockchip@lists.infradead.org, dri-devel@lists.freedesktop.org, Lin Huang , kernel@collabora.com, Sean Paul , linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH 03/10] devfreq: rk3399_dmc: Pass ODT and auto power down parameters to TF-A. Date: Mon, 14 May 2018 23:16:03 +0200 Message-Id: <20180514211610.26618-4-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180514211610.26618-1-enric.balletbo@collabora.com> References: <20180514211610.26618-1-enric.balletbo@collabora.com> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Trusted Firmware-A (TF-A) for rk3399 implements a SiP call to get the on-die termination (ODT) and auto power down parameters from kernel, this patch adds the functionality to do this. Also, if DDR clock frequency is lower than the on-die termination (ODT) disable frequency this driver should disable the DDR ODT. Signed-off-by: Enric Balletbo i Serra --- drivers/devfreq/rk3399_dmc.c | 50 ++++++++++++++++++++++++++++- include/soc/rockchip/rockchip_sip.h | 1 + 2 files changed, 50 insertions(+), 1 deletion(-) diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c index d5c03e5abe13..cc1bbca3fb15 100644 --- a/drivers/devfreq/rk3399_dmc.c +++ b/drivers/devfreq/rk3399_dmc.c @@ -18,14 +18,17 @@ #include #include #include +#include #include #include #include #include +#include #include #include #include +#include #include struct dram_timing { @@ -69,8 +72,11 @@ struct rk3399_dmcfreq { struct mutex lock; struct dram_timing timing; struct regulator *vdd_center; + struct regmap *regmap_pmu; unsigned long rate, target_rate; unsigned long volt, target_volt; + unsigned int odt_dis_freq; + int odt_pd_arg0, odt_pd_arg1; }; static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq, @@ -80,6 +86,8 @@ static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq, struct dev_pm_opp *opp; unsigned long old_clk_rate = dmcfreq->rate; unsigned long target_volt, target_rate; + struct arm_smccc_res res; + int dram_flag; int err; opp = devfreq_recommended_opp(dev, freq, flags); @@ -95,6 +103,15 @@ static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq, mutex_lock(&dmcfreq->lock); + dram_flag = 0; + if (target_rate >= dmcfreq->odt_dis_freq) + dram_flag = 1; + + arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, dmcfreq->odt_pd_arg0, + dmcfreq->odt_pd_arg1, + ROCKCHIP_SIP_CONFIG_DRAM_SET_ODT_PD, + dram_flag, 0, 0, 0, &res); + /* * If frequency scaling from low to high, adjust voltage first. * If frequency scaling from high to low, adjust frequency first. @@ -294,11 +311,13 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev) { struct arm_smccc_res res; struct device *dev = &pdev->dev; - struct device_node *np = pdev->dev.of_node; + struct device_node *np = pdev->dev.of_node, *node; struct rk3399_dmcfreq *data; int ret, index, size; uint32_t *timing; struct dev_pm_opp *opp; + u32 ddr_type; + u32 val; data = devm_kzalloc(dev, sizeof(struct rk3399_dmcfreq), GFP_KERNEL); if (!data) @@ -334,6 +353,29 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev) return ret; } + /* Try to find the optional reference to the pmu syscon */ + node = of_parse_phandle(np, "rockchip,pmu", 0); + if (node) { + data->regmap_pmu = syscon_node_to_regmap(node); + if (IS_ERR(data->regmap_pmu)) + return PTR_ERR(data->regmap_pmu); + } + + /* Get DDR type */ + regmap_read(data->regmap_pmu, RK3399_PMUGRF_OS_REG2, &val); + ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) & + RK3399_PMUGRF_DDRTYPE_MASK; + + /* Get the odt_dis_freq parameter in function of the DDR type */ + if (ddr_type == RK3399_PMUGRF_DDRTYPE_DDR3) + data->odt_dis_freq = data->timing.ddr3_odt_dis_freq; + else if (ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR3) + data->odt_dis_freq = data->timing.lpddr3_odt_dis_freq; + else if (ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR4) + data->odt_dis_freq = data->timing.lpddr4_odt_dis_freq; + else + return -EINVAL; + /* * Get dram timing and pass it to arm trust firmware, * the dram drvier in arm trust firmware will get these @@ -358,6 +400,12 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev) ROCKCHIP_SIP_CONFIG_DRAM_INIT, 0, 0, 0, 0, &res); + data->odt_pd_arg0 = (data->timing.sr_idle & 0xff) | + ((data->timing.sr_mc_gate_idle & 0xff) << 8) | + ((data->timing.standby_idle & 0xffff) << 16); + data->odt_pd_arg1 = (data->timing.pd_idle & 0xfff) | + ((data->timing.srpd_lite_idle & 0xfff) << 16); + /* * We add a devfreq driver to our parent since it has a device tree node * with operating points. diff --git a/include/soc/rockchip/rockchip_sip.h b/include/soc/rockchip/rockchip_sip.h index 7e28092c4d3d..ad9482c56797 100644 --- a/include/soc/rockchip/rockchip_sip.h +++ b/include/soc/rockchip/rockchip_sip.h @@ -23,5 +23,6 @@ #define ROCKCHIP_SIP_CONFIG_DRAM_GET_RATE 0x05 #define ROCKCHIP_SIP_CONFIG_DRAM_CLR_IRQ 0x06 #define ROCKCHIP_SIP_CONFIG_DRAM_SET_PARAM 0x07 +#define ROCKCHIP_SIP_CONFIG_DRAM_SET_ODT_PD 0x08 #endif