From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752737AbeBZJz6 (ORCPT ); Mon, 26 Feb 2018 04:55:58 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:47868 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751022AbeBZJzU (ORCPT ); Mon, 26 Feb 2018 04:55:20 -0500 DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 75A596110B Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=sricharan@codeaurora.org From: Sricharan R To: viresh.kumar@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, mturquette@baylibre.com, sboyd@codeaurora.org, linux@armlinux.org.uk, andy.gross@linaro.org, david.brown@linaro.org, rjw@rjwysocki.net, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, linux-pm@vger.kernel.org, robh@kernel.org Cc: sricharan@codeaurora.org Subject: [PATCH v7 14/15] cpufreq: Add module to register cpufreq on Krait CPUs Date: Mon, 26 Feb 2018 15:23:30 +0530 Message-Id: <1519638811-17269-15-git-send-email-sricharan@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1519638811-17269-1-git-send-email-sricharan@codeaurora.org> References: <1519638811-17269-1-git-send-email-sricharan@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stephen Boyd Register a cpufreq-generic device whenever we detect that a "qcom,krait" compatible CPU is present in DT. Cc: [Sricharan: updated to use dev_pm_opp_set_prop_name and nvmem apis] Signed-off-by: Sricharan R Signed-off-by: Stephen Boyd --- drivers/cpufreq/Kconfig.arm | 10 ++ drivers/cpufreq/Makefile | 3 + drivers/cpufreq/cpufreq-dt-platdev.c | 5 + drivers/cpufreq/qcom-cpufreq.c | 182 +++++++++++++++++++++++++++++++++++ 4 files changed, 200 insertions(+) create mode 100644 drivers/cpufreq/qcom-cpufreq.c diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index 3a88e33..826f9e7 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -133,6 +133,16 @@ config ARM_OMAP2PLUS_CPUFREQ depends on ARCH_OMAP2PLUS default ARCH_OMAP2PLUS +config ARM_QCOM_CPUFREQ + bool "CPUfreq driver for the QCOM SoCs with KRAIT processors" + depends on ARCH_QCOM + select PM_OPP + help + This enables the CPUFreq driver for Qualcomm SoCs with + KRAIT processors. + + If in doubt, say N. + config ARM_S3C_CPUFREQ bool help diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index c60c1e1..21894f6 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -65,6 +65,9 @@ obj-$(CONFIG_MACH_MVEBU_V7) += mvebu-cpufreq.o obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o +obj-$(CONFIG_ARM_QCOM_CPUFREQ) += qcom-cpufreq.o +obj-$(CONFIG_ARM_S3C24XX_CPUFREQ) += s3c24xx-cpufreq.o +obj-$(CONFIG_ARM_S3C24XX_CPUFREQ_DEBUGFS) += s3c24xx-cpufreq-debugfs.o obj-$(CONFIG_ARM_S3C2410_CPUFREQ) += s3c2410-cpufreq.o obj-$(CONFIG_ARM_S3C2412_CPUFREQ) += s3c2412-cpufreq.o obj-$(CONFIG_ARM_S3C2416_CPUFREQ) += s3c2416-cpufreq.o diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c index 3b585e4..e2e9a99 100644 --- a/drivers/cpufreq/cpufreq-dt-platdev.c +++ b/drivers/cpufreq/cpufreq-dt-platdev.c @@ -127,6 +127,11 @@ { .compatible = "ti,am43", }, { .compatible = "ti,dra7", }, + { .compatible = "qcom,ipq8064", }, + { .compatible = "qcom,apq8064", }, + { .compatible = "qcom,msm8974", }, + { .compatible = "qcom,msm8960", }, + { } }; diff --git a/drivers/cpufreq/qcom-cpufreq.c b/drivers/cpufreq/qcom-cpufreq.c new file mode 100644 index 0000000..20d9fa8 --- /dev/null +++ b/drivers/cpufreq/qcom-cpufreq.c @@ -0,0 +1,182 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018, The Linux Foundation. All rights reserved. + +#include +#include +#include +#include +#include +#include +#include + +static void __init get_krait_bin_format_a(int *speed, int *pvs, int *pvs_ver, + struct nvmem_cell *pvs_nvmem, u8 *buf) +{ + u32 pte_efuse; + + pte_efuse = *((u32 *)buf); + + *speed = pte_efuse & 0xf; + if (*speed == 0xf) + *speed = (pte_efuse >> 4) & 0xf; + + if (*speed == 0xf) { + *speed = 0; + pr_warn("Speed bin: Defaulting to %d\n", *speed); + } else { + pr_info("Speed bin: %d\n", *speed); + } + + *pvs = (pte_efuse >> 10) & 0x7; + if (*pvs == 0x7) + *pvs = (pte_efuse >> 13) & 0x7; + + if (*pvs == 0x7) { + *pvs = 0; + pr_warn("PVS bin: Defaulting to %d\n", *pvs); + } else { + pr_info("PVS bin: %d\n", *pvs); + } + + kfree(buf); +} + +static void __init get_krait_bin_format_b(int *speed, int *pvs, int *pvs_ver, + struct nvmem_cell *pvs_nvmem, u8 *buf) +{ + u32 pte_efuse, redundant_sel; + + pte_efuse = *((u32 *)buf); + redundant_sel = (pte_efuse >> 24) & 0x7; + *speed = pte_efuse & 0x7; + + /* 4 bits of PVS are in efuse register bits 31, 8-6. */ + *pvs = ((pte_efuse >> 28) & 0x8) | ((pte_efuse >> 6) & 0x7); + *pvs_ver = (pte_efuse >> 4) & 0x3; + + switch (redundant_sel) { + case 1: + *speed = (pte_efuse >> 27) & 0xf; + break; + case 2: + *pvs = (pte_efuse >> 27) & 0xf; + break; + } + + /* Check SPEED_BIN_BLOW_STATUS */ + if (pte_efuse & BIT(3)) { + pr_info("Speed bin: %d\n", *speed); + } else { + pr_warn("Speed bin not set. Defaulting to 0!\n"); + *speed = 0; + } + + /* Check PVS_BLOW_STATUS */ + pte_efuse = *(((u32 *)buf) + 4); + if (pte_efuse) { + pr_info("PVS bin: %d\n", *pvs); + } else { + pr_warn("PVS bin not set. Defaulting to 0!\n"); + *pvs = 0; + } + + pr_info("PVS version: %d\n", *pvs_ver); + kfree(buf); +} + +static int __init qcom_cpufreq_populate_opps(struct nvmem_cell *pvs_nvmem, + struct opp_table **tbl) +{ + int speed = 0, pvs = 0, pvs_ver = 0, cpu; + struct device *cpu_dev; + u8 *buf; + size_t len; + char pvs_name[] = "speedXX-pvsXX-vXX"; + + buf = nvmem_cell_read(pvs_nvmem, &len); + if (len == 4) + get_krait_bin_format_a(&speed, &pvs, &pvs_ver, pvs_nvmem, buf); + else if (len == 8) + get_krait_bin_format_b(&speed, &pvs, &pvs_ver, pvs_nvmem, buf); + else + pr_warn("Unable to read nvmem data. Defaulting to 0!\n"); + + snprintf(pvs_name, sizeof(pvs_name), "speed%d-pvs%d-v%d", + speed, pvs, pvs_ver); + + for (cpu = 0; cpu < num_possible_cpus(); cpu++) { + cpu_dev = get_cpu_device(cpu); + if (!cpu_dev) + return -ENODEV; + + tbl[cpu] = dev_pm_opp_set_prop_name(cpu_dev, pvs_name); + + if (IS_ERR(tbl[cpu])) { + tbl[cpu] = 0; + pr_warn("failed to add OPP name %s\n", pvs_name); + return PTR_ERR(tbl[cpu]); + } + } + + return 0; +} + +static int __init qcom_cpufreq_driver_init(void) +{ + struct platform_device *pdev; + struct device *cpu_dev; + struct device_node *np; + struct nvmem_cell *pvs_nvmem; + struct opp_table *tbl[NR_CPUS] = { NULL }; + int ret, cpu = 0; + + cpu_dev = get_cpu_device(0); + if (!cpu_dev) + return -ENODEV; + + np = dev_pm_opp_of_get_opp_desc_node(cpu_dev); + if (!np) + return -ENOENT; + + if (!of_device_is_compatible(np, "operating-points-v2-krait-cpu")) { + ret = -ENOENT; + goto free_np; + } + + pvs_nvmem = of_nvmem_cell_get(np, NULL); + if (IS_ERR(pvs_nvmem)) { + dev_err(cpu_dev, "Could not get nvmem cell\n"); + ret = PTR_ERR(pvs_nvmem); + goto free_np; + } + + ret = qcom_cpufreq_populate_opps(pvs_nvmem, tbl); + if (ret) + goto free_opp_name; + + pdev = platform_device_register_simple("cpufreq-dt", -1, NULL, 0); + if (IS_ERR(pdev)) { + ret = PTR_ERR(pdev); + goto free_opp_name; + } + + of_node_put(np); + + return 0; + +free_opp_name: + while (tbl[cpu]) { + dev_pm_opp_put_prop_name(tbl[cpu]); + cpu++; + } + +free_np: + of_node_put(np); + + return ret; +} +late_initcall(qcom_cpufreq_driver_init); + +MODULE_DESCRIPTION("Qualcomm CPUfreq driver"); +MODULE_AUTHOR("Stephen Boyd "); +MODULE_LICENSE("GPL v2"); -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation