From patchwork Tue Apr 24 20:32:32 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 10361045 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 658C26038F for ; Tue, 24 Apr 2018 20:37:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 528EF289D7 for ; Tue, 24 Apr 2018 20:37:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4668828DF0; Tue, 24 Apr 2018 20:37:14 +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 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 23E2528D88 for ; Tue, 24 Apr 2018 20:37:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752273AbeDXUhJ (ORCPT ); Tue, 24 Apr 2018 16:37:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:41564 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751368AbeDXUdd (ORCPT ); Tue, 24 Apr 2018 16:33:33 -0400 Received: from localhost.localdomain (adsl-84-226-183-37.adslplus.ch [84.226.183.37]) (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 909C0217CE; Tue, 24 Apr 2018 20:33:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 909C0217CE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=krzk@kernel.org From: Krzysztof Kozlowski To: Kukjin Kim , Krzysztof Kozlowski , Rob Herring , Mark Rutland , Tejun Heo , Sylwester Nawrocki , Tomasz Figa , Chanwoo Choi , Michael Turquette , Stephen Boyd , "Rafael J. Wysocki" , Viresh Kumar , Zhang Rui , Eduardo Valentin , Russell King , Hans de Goede , Linus Walleij , Andi Shyti , Mark Brown , Bartlomiej Zolnierkiewicz , Alan Stern , Greg Kroah-Hartman , linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, linux-clk@vger.kernel.org, linux-pm@vger.kernel.org, linux-i2c@vger.kernel.org, linux-gpio@vger.kernel.org, linux-spi@vger.kernel.org, linux-usb@vger.kernel.org Cc: Marek Szyprowski , Arnd Bergmann , Olof Johansson , Jaehoon Chung Subject: [RFC 03/10] cpufreq: exynos: Remove support for Exynos5440 Date: Tue, 24 Apr 2018 22:32:32 +0200 Message-Id: <20180424203239.21885-4-krzk@kernel.org> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180424203239.21885-1-krzk@kernel.org> References: <20180424203239.21885-1-krzk@kernel.org> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The Exynos5440 is not actively developed, there are no development boards available and probably there are no real products with it. Remove wide-tree support for Exynos5440. Signed-off-by: Krzysztof Kozlowski Acked-by: Viresh Kumar Reviewed-by: Chanwoo Choi Reviewed-by: Rob Herring --- .../bindings/cpufreq/cpufreq-exynos5440.txt | 28 -- drivers/cpufreq/Kconfig.arm | 14 - drivers/cpufreq/Makefile | 1 - drivers/cpufreq/exynos5440-cpufreq.c | 452 --------------------- 4 files changed, 495 deletions(-) delete mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-exynos5440.txt delete mode 100644 drivers/cpufreq/exynos5440-cpufreq.c diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-exynos5440.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-exynos5440.txt deleted file mode 100644 index caff1a57436f..000000000000 --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-exynos5440.txt +++ /dev/null @@ -1,28 +0,0 @@ - -Exynos5440 cpufreq driver -------------------- - -Exynos5440 SoC cpufreq driver for CPU frequency scaling. - -Required properties: -- interrupts: Interrupt to know the completion of cpu frequency change. -- operating-points: Table of frequencies and voltage CPU could be transitioned into, - in the decreasing order. Frequency should be in KHz units and voltage - should be in microvolts. - -Optional properties: -- clock-latency: Clock monitor latency in microsecond. - -All the required listed above must be defined under node cpufreq. - -Example: --------- - cpufreq@160000 { - compatible = "samsung,exynos5440-cpufreq"; - reg = <0x160000 0x1000>; - interrupts = <0 57 0>; - operating-points = < - 1000000 975000 - 800000 925000>; - clock-latency = <100000>; - }; diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index 7f56fe5183f2..538a4004a2c5 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -81,20 +81,6 @@ config ARM_BRCMSTB_AVS_CPUFREQ_DEBUG If in doubt, say N. -config ARM_EXYNOS5440_CPUFREQ - tristate "SAMSUNG EXYNOS5440" - depends on SOC_EXYNOS5440 - depends on HAVE_CLK && OF - select PM_OPP - default y - help - This adds the CPUFreq driver for Samsung EXYNOS5440 - SoC. The nature of exynos5440 clock controller is - different than previous exynos controllers so not using - the common exynos framework. - - If in doubt, say N. - config ARM_HIGHBANK_CPUFREQ tristate "Calxeda Highbank-based" depends on ARCH_HIGHBANK && CPUFREQ_DT && REGULATOR diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 8d24ade3bd02..56724f867f78 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -56,7 +56,6 @@ obj-$(CONFIG_ARM_ARMADA_37XX_CPUFREQ) += armada-37xx-cpufreq.o obj-$(CONFIG_ARM_BRCMSTB_AVS_CPUFREQ) += brcmstb-avs-cpufreq.o obj-$(CONFIG_ACPI_CPPC_CPUFREQ) += cppc_cpufreq.o obj-$(CONFIG_ARCH_DAVINCI) += davinci-cpufreq.o -obj-$(CONFIG_ARM_EXYNOS5440_CPUFREQ) += exynos5440-cpufreq.o obj-$(CONFIG_ARM_HIGHBANK_CPUFREQ) += highbank-cpufreq.o obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o diff --git a/drivers/cpufreq/exynos5440-cpufreq.c b/drivers/cpufreq/exynos5440-cpufreq.c deleted file mode 100644 index 932caa386ece..000000000000 --- a/drivers/cpufreq/exynos5440-cpufreq.c +++ /dev/null @@ -1,452 +0,0 @@ -/* - * Copyright (c) 2013 Samsung Electronics Co., Ltd. - * http://www.samsung.com - * - * Amit Daniel Kachhap - * - * EXYNOS5440 - CPU frequency scaling support - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* Register definitions */ -#define XMU_DVFS_CTRL 0x0060 -#define XMU_PMU_P0_7 0x0064 -#define XMU_C0_3_PSTATE 0x0090 -#define XMU_P_LIMIT 0x00a0 -#define XMU_P_STATUS 0x00a4 -#define XMU_PMUEVTEN 0x00d0 -#define XMU_PMUIRQEN 0x00d4 -#define XMU_PMUIRQ 0x00d8 - -/* PMU mask and shift definations */ -#define P_VALUE_MASK 0x7 - -#define XMU_DVFS_CTRL_EN_SHIFT 0 - -#define P0_7_CPUCLKDEV_SHIFT 21 -#define P0_7_CPUCLKDEV_MASK 0x7 -#define P0_7_ATBCLKDEV_SHIFT 18 -#define P0_7_ATBCLKDEV_MASK 0x7 -#define P0_7_CSCLKDEV_SHIFT 15 -#define P0_7_CSCLKDEV_MASK 0x7 -#define P0_7_CPUEMA_SHIFT 28 -#define P0_7_CPUEMA_MASK 0xf -#define P0_7_L2EMA_SHIFT 24 -#define P0_7_L2EMA_MASK 0xf -#define P0_7_VDD_SHIFT 8 -#define P0_7_VDD_MASK 0x7f -#define P0_7_FREQ_SHIFT 0 -#define P0_7_FREQ_MASK 0xff - -#define C0_3_PSTATE_VALID_SHIFT 8 -#define C0_3_PSTATE_CURR_SHIFT 4 -#define C0_3_PSTATE_NEW_SHIFT 0 - -#define PSTATE_CHANGED_EVTEN_SHIFT 0 - -#define PSTATE_CHANGED_IRQEN_SHIFT 0 - -#define PSTATE_CHANGED_SHIFT 0 - -/* some constant values for clock divider calculation */ -#define CPU_DIV_FREQ_MAX 500 -#define CPU_DBG_FREQ_MAX 375 -#define CPU_ATB_FREQ_MAX 500 - -#define PMIC_LOW_VOLT 0x30 -#define PMIC_HIGH_VOLT 0x28 - -#define CPUEMA_HIGH 0x2 -#define CPUEMA_MID 0x4 -#define CPUEMA_LOW 0x7 - -#define L2EMA_HIGH 0x1 -#define L2EMA_MID 0x3 -#define L2EMA_LOW 0x4 - -#define DIV_TAB_MAX 2 -/* frequency unit is 20MHZ */ -#define FREQ_UNIT 20 -#define MAX_VOLTAGE 1550000 /* In microvolt */ -#define VOLTAGE_STEP 12500 /* In microvolt */ - -#define CPUFREQ_NAME "exynos5440_dvfs" -#define DEF_TRANS_LATENCY 100000 - -enum cpufreq_level_index { - L0, L1, L2, L3, L4, - L5, L6, L7, L8, L9, -}; -#define CPUFREQ_LEVEL_END (L7 + 1) - -struct exynos_dvfs_data { - void __iomem *base; - struct resource *mem; - int irq; - struct clk *cpu_clk; - unsigned int latency; - struct cpufreq_frequency_table *freq_table; - unsigned int freq_count; - struct device *dev; - bool dvfs_enabled; - struct work_struct irq_work; -}; - -static struct exynos_dvfs_data *dvfs_info; -static DEFINE_MUTEX(cpufreq_lock); -static struct cpufreq_freqs freqs; - -static int init_div_table(void) -{ - struct cpufreq_frequency_table *pos, *freq_tbl = dvfs_info->freq_table; - unsigned int tmp, clk_div, ema_div, freq, volt_id, idx; - struct dev_pm_opp *opp; - - cpufreq_for_each_entry_idx(pos, freq_tbl, idx) { - opp = dev_pm_opp_find_freq_exact(dvfs_info->dev, - pos->frequency * 1000, true); - if (IS_ERR(opp)) { - dev_err(dvfs_info->dev, - "failed to find valid OPP for %u KHZ\n", - pos->frequency); - return PTR_ERR(opp); - } - - freq = pos->frequency / 1000; /* In MHZ */ - clk_div = ((freq / CPU_DIV_FREQ_MAX) & P0_7_CPUCLKDEV_MASK) - << P0_7_CPUCLKDEV_SHIFT; - clk_div |= ((freq / CPU_ATB_FREQ_MAX) & P0_7_ATBCLKDEV_MASK) - << P0_7_ATBCLKDEV_SHIFT; - clk_div |= ((freq / CPU_DBG_FREQ_MAX) & P0_7_CSCLKDEV_MASK) - << P0_7_CSCLKDEV_SHIFT; - - /* Calculate EMA */ - volt_id = dev_pm_opp_get_voltage(opp); - - volt_id = (MAX_VOLTAGE - volt_id) / VOLTAGE_STEP; - if (volt_id < PMIC_HIGH_VOLT) { - ema_div = (CPUEMA_HIGH << P0_7_CPUEMA_SHIFT) | - (L2EMA_HIGH << P0_7_L2EMA_SHIFT); - } else if (volt_id > PMIC_LOW_VOLT) { - ema_div = (CPUEMA_LOW << P0_7_CPUEMA_SHIFT) | - (L2EMA_LOW << P0_7_L2EMA_SHIFT); - } else { - ema_div = (CPUEMA_MID << P0_7_CPUEMA_SHIFT) | - (L2EMA_MID << P0_7_L2EMA_SHIFT); - } - - tmp = (clk_div | ema_div | (volt_id << P0_7_VDD_SHIFT) - | ((freq / FREQ_UNIT) << P0_7_FREQ_SHIFT)); - - __raw_writel(tmp, dvfs_info->base + XMU_PMU_P0_7 + 4 * idx); - dev_pm_opp_put(opp); - } - - return 0; -} - -static void exynos_enable_dvfs(unsigned int cur_frequency) -{ - unsigned int tmp, cpu; - struct cpufreq_frequency_table *freq_table = dvfs_info->freq_table; - struct cpufreq_frequency_table *pos; - /* Disable DVFS */ - __raw_writel(0, dvfs_info->base + XMU_DVFS_CTRL); - - /* Enable PSTATE Change Event */ - tmp = __raw_readl(dvfs_info->base + XMU_PMUEVTEN); - tmp |= (1 << PSTATE_CHANGED_EVTEN_SHIFT); - __raw_writel(tmp, dvfs_info->base + XMU_PMUEVTEN); - - /* Enable PSTATE Change IRQ */ - tmp = __raw_readl(dvfs_info->base + XMU_PMUIRQEN); - tmp |= (1 << PSTATE_CHANGED_IRQEN_SHIFT); - __raw_writel(tmp, dvfs_info->base + XMU_PMUIRQEN); - - /* Set initial performance index */ - cpufreq_for_each_entry(pos, freq_table) - if (pos->frequency == cur_frequency) - break; - - if (pos->frequency == CPUFREQ_TABLE_END) { - dev_crit(dvfs_info->dev, "Boot up frequency not supported\n"); - /* Assign the highest frequency */ - pos = freq_table; - cur_frequency = pos->frequency; - } - - dev_info(dvfs_info->dev, "Setting dvfs initial frequency = %uKHZ", - cur_frequency); - - for (cpu = 0; cpu < CONFIG_NR_CPUS; cpu++) { - tmp = __raw_readl(dvfs_info->base + XMU_C0_3_PSTATE + cpu * 4); - tmp &= ~(P_VALUE_MASK << C0_3_PSTATE_NEW_SHIFT); - tmp |= ((pos - freq_table) << C0_3_PSTATE_NEW_SHIFT); - __raw_writel(tmp, dvfs_info->base + XMU_C0_3_PSTATE + cpu * 4); - } - - /* Enable DVFS */ - __raw_writel(1 << XMU_DVFS_CTRL_EN_SHIFT, - dvfs_info->base + XMU_DVFS_CTRL); -} - -static int exynos_target(struct cpufreq_policy *policy, unsigned int index) -{ - unsigned int tmp; - int i; - struct cpufreq_frequency_table *freq_table = dvfs_info->freq_table; - - mutex_lock(&cpufreq_lock); - - freqs.old = policy->cur; - freqs.new = freq_table[index].frequency; - - cpufreq_freq_transition_begin(policy, &freqs); - - /* Set the target frequency in all C0_3_PSTATE register */ - for_each_cpu(i, policy->cpus) { - tmp = __raw_readl(dvfs_info->base + XMU_C0_3_PSTATE + i * 4); - tmp &= ~(P_VALUE_MASK << C0_3_PSTATE_NEW_SHIFT); - tmp |= (index << C0_3_PSTATE_NEW_SHIFT); - - __raw_writel(tmp, dvfs_info->base + XMU_C0_3_PSTATE + i * 4); - } - mutex_unlock(&cpufreq_lock); - return 0; -} - -static void exynos_cpufreq_work(struct work_struct *work) -{ - unsigned int cur_pstate, index; - struct cpufreq_policy *policy = cpufreq_cpu_get(0); /* boot CPU */ - struct cpufreq_frequency_table *freq_table = dvfs_info->freq_table; - - /* Ensure we can access cpufreq structures */ - if (unlikely(dvfs_info->dvfs_enabled == false)) - goto skip_work; - - mutex_lock(&cpufreq_lock); - freqs.old = policy->cur; - - cur_pstate = __raw_readl(dvfs_info->base + XMU_P_STATUS); - if (cur_pstate >> C0_3_PSTATE_VALID_SHIFT & 0x1) - index = (cur_pstate >> C0_3_PSTATE_CURR_SHIFT) & P_VALUE_MASK; - else - index = (cur_pstate >> C0_3_PSTATE_NEW_SHIFT) & P_VALUE_MASK; - - if (likely(index < dvfs_info->freq_count)) { - freqs.new = freq_table[index].frequency; - } else { - dev_crit(dvfs_info->dev, "New frequency out of range\n"); - freqs.new = freqs.old; - } - cpufreq_freq_transition_end(policy, &freqs, 0); - - cpufreq_cpu_put(policy); - mutex_unlock(&cpufreq_lock); -skip_work: - enable_irq(dvfs_info->irq); -} - -static irqreturn_t exynos_cpufreq_irq(int irq, void *id) -{ - unsigned int tmp; - - tmp = __raw_readl(dvfs_info->base + XMU_PMUIRQ); - if (tmp >> PSTATE_CHANGED_SHIFT & 0x1) { - __raw_writel(tmp, dvfs_info->base + XMU_PMUIRQ); - disable_irq_nosync(irq); - schedule_work(&dvfs_info->irq_work); - } - return IRQ_HANDLED; -} - -static void exynos_sort_descend_freq_table(void) -{ - struct cpufreq_frequency_table *freq_tbl = dvfs_info->freq_table; - int i = 0, index; - unsigned int tmp_freq; - /* - * Exynos5440 clock controller state logic expects the cpufreq table to - * be in descending order. But the OPP library constructs the table in - * ascending order. So to make the table descending we just need to - * swap the i element with the N - i element. - */ - for (i = 0; i < dvfs_info->freq_count / 2; i++) { - index = dvfs_info->freq_count - i - 1; - tmp_freq = freq_tbl[i].frequency; - freq_tbl[i].frequency = freq_tbl[index].frequency; - freq_tbl[index].frequency = tmp_freq; - } -} - -static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy) -{ - policy->clk = dvfs_info->cpu_clk; - return cpufreq_generic_init(policy, dvfs_info->freq_table, - dvfs_info->latency); -} - -static struct cpufreq_driver exynos_driver = { - .flags = CPUFREQ_STICKY | CPUFREQ_ASYNC_NOTIFICATION | - CPUFREQ_NEED_INITIAL_FREQ_CHECK, - .verify = cpufreq_generic_frequency_table_verify, - .target_index = exynos_target, - .get = cpufreq_generic_get, - .init = exynos_cpufreq_cpu_init, - .name = CPUFREQ_NAME, - .attr = cpufreq_generic_attr, -}; - -static const struct of_device_id exynos_cpufreq_match[] = { - { - .compatible = "samsung,exynos5440-cpufreq", - }, - {}, -}; -MODULE_DEVICE_TABLE(of, exynos_cpufreq_match); - -static int exynos_cpufreq_probe(struct platform_device *pdev) -{ - int ret = -EINVAL; - struct device_node *np; - struct resource res; - unsigned int cur_frequency; - - np = pdev->dev.of_node; - if (!np) - return -ENODEV; - - dvfs_info = devm_kzalloc(&pdev->dev, sizeof(*dvfs_info), GFP_KERNEL); - if (!dvfs_info) { - ret = -ENOMEM; - goto err_put_node; - } - - dvfs_info->dev = &pdev->dev; - - ret = of_address_to_resource(np, 0, &res); - if (ret) - goto err_put_node; - - dvfs_info->base = devm_ioremap_resource(dvfs_info->dev, &res); - if (IS_ERR(dvfs_info->base)) { - ret = PTR_ERR(dvfs_info->base); - goto err_put_node; - } - - dvfs_info->irq = irq_of_parse_and_map(np, 0); - if (!dvfs_info->irq) { - dev_err(dvfs_info->dev, "No cpufreq irq found\n"); - ret = -ENODEV; - goto err_put_node; - } - - ret = dev_pm_opp_of_add_table(dvfs_info->dev); - if (ret) { - dev_err(dvfs_info->dev, "failed to init OPP table: %d\n", ret); - goto err_put_node; - } - - ret = dev_pm_opp_init_cpufreq_table(dvfs_info->dev, - &dvfs_info->freq_table); - if (ret) { - dev_err(dvfs_info->dev, - "failed to init cpufreq table: %d\n", ret); - goto err_free_opp; - } - dvfs_info->freq_count = dev_pm_opp_get_opp_count(dvfs_info->dev); - exynos_sort_descend_freq_table(); - - if (of_property_read_u32(np, "clock-latency", &dvfs_info->latency)) - dvfs_info->latency = DEF_TRANS_LATENCY; - - dvfs_info->cpu_clk = devm_clk_get(dvfs_info->dev, "armclk"); - if (IS_ERR(dvfs_info->cpu_clk)) { - dev_err(dvfs_info->dev, "Failed to get cpu clock\n"); - ret = PTR_ERR(dvfs_info->cpu_clk); - goto err_free_table; - } - - cur_frequency = clk_get_rate(dvfs_info->cpu_clk); - if (!cur_frequency) { - dev_err(dvfs_info->dev, "Failed to get clock rate\n"); - ret = -EINVAL; - goto err_free_table; - } - cur_frequency /= 1000; - - INIT_WORK(&dvfs_info->irq_work, exynos_cpufreq_work); - ret = devm_request_irq(dvfs_info->dev, dvfs_info->irq, - exynos_cpufreq_irq, IRQF_TRIGGER_NONE, - CPUFREQ_NAME, dvfs_info); - if (ret) { - dev_err(dvfs_info->dev, "Failed to register IRQ\n"); - goto err_free_table; - } - - ret = init_div_table(); - if (ret) { - dev_err(dvfs_info->dev, "Failed to initialise div table\n"); - goto err_free_table; - } - - exynos_enable_dvfs(cur_frequency); - ret = cpufreq_register_driver(&exynos_driver); - if (ret) { - dev_err(dvfs_info->dev, - "%s: failed to register cpufreq driver\n", __func__); - goto err_free_table; - } - - of_node_put(np); - dvfs_info->dvfs_enabled = true; - return 0; - -err_free_table: - dev_pm_opp_free_cpufreq_table(dvfs_info->dev, &dvfs_info->freq_table); -err_free_opp: - dev_pm_opp_of_remove_table(dvfs_info->dev); -err_put_node: - of_node_put(np); - dev_err(&pdev->dev, "%s: failed initialization\n", __func__); - return ret; -} - -static int exynos_cpufreq_remove(struct platform_device *pdev) -{ - cpufreq_unregister_driver(&exynos_driver); - dev_pm_opp_free_cpufreq_table(dvfs_info->dev, &dvfs_info->freq_table); - dev_pm_opp_of_remove_table(dvfs_info->dev); - return 0; -} - -static struct platform_driver exynos_cpufreq_platdrv = { - .driver = { - .name = "exynos5440-cpufreq", - .of_match_table = exynos_cpufreq_match, - }, - .probe = exynos_cpufreq_probe, - .remove = exynos_cpufreq_remove, -}; -module_platform_driver(exynos_cpufreq_platdrv); - -MODULE_AUTHOR("Amit Daniel Kachhap "); -MODULE_DESCRIPTION("Exynos5440 cpufreq driver"); -MODULE_LICENSE("GPL");