From patchwork Wed Jan 26 15:40:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Conor Dooley X-Patchwork-Id: 536850 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6E516C3526D for ; Wed, 26 Jan 2022 15:37:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242998AbiAZPht (ORCPT ); Wed, 26 Jan 2022 10:37:49 -0500 Received: from esa.microchip.iphmx.com ([68.232.153.233]:30281 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242985AbiAZPht (ORCPT ); Wed, 26 Jan 2022 10:37:49 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1643211469; x=1674747469; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=qYQL/2vLasMvQaOGDiMD2exx1N8juhfE8Ppak7zURa8=; b=jXOz/ICIDR4W1sQdy91nbrt6BETtXyIFptobAEtHaRcwdedOQru/sue2 0nJIbp785S4JZMpetw+1/FljVqEVkLn4iaWL4x/FNsXh8vNCmOitCstm8 FeG/N8u2HSq3WXsqiFYrQJxHhZ6dk60YFPV2X11jOGCGZIQRt/hy+QWgA UTu8UBj5CEkRAGTJGKDUvPGM9UTLkUdO8gQHgXkNc1H1q1VpVBEj1d2qf CjAwQDJZSrNX6t5evoh2aw9hge7jotf/4iBhnL3nzfF/zn/74DCB/b+2E kIexsTbIyL400vomRF/Vu2Ra8+ezPC1t4vAFV17mJTH/2QOsq97CBKexX A==; IronPort-SDR: AGQUCIZKcXpZ5HxdkfWWRvFtBFoDIuag+97yFDm46L8Z8wvxofUGSGrdpsrvrutbwxnjNqxL14 S7/MaeoY2O0pF4VYHctYQnWMTRKPhpr6HrZlcv6RLtR6v6FHkHjgeYE9NpMPZpK5LH0YsmuxfB HTgJ6ugnyI80BApum9Qa0SPVzUoMHNFmDWLn7Jz8GMmjfhVZchSY0mA0nGhwT+R5RYZgVSq7wY F6KY7nN8qQ+gi8FTNGrmKkwTwcK23mbfmR6OYGn97jHBP0VMLDl/joYgoMBrdiHd7RR9CbTyyN alesffdCrI9fh3r7rcMn4vp1 X-IronPort-AV: E=Sophos;i="5.88,318,1635231600"; d="scan'208";a="151513893" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 26 Jan 2022 08:37:48 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Wed, 26 Jan 2022 08:37:48 -0700 Received: from wendy.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Wed, 26 Jan 2022 08:37:45 -0700 From: To: , , , , CC: , , , , , , , Padmarao Bengari Subject: [PATCH v10 1/1] clk: microchip: Add driver for Microchip PolarFire SoC Date: Wed, 26 Jan 2022 15:40:05 +0000 Message-ID: <20220126154003.3797323-2-conor.dooley@microchip.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220126154003.3797323-1-conor.dooley@microchip.com> References: <20220126154003.3797323-1-conor.dooley@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Daire McNamara Add support for clock configuration on Microchip PolarFire SoC Reviewed-by: Geert Uytterhoeven Tested-by: Geert Uytterhoeven Co-developed-by: Padmarao Bengari Signed-off-by: Padmarao Bengari Signed-off-by: Daire McNamara Co-developed-by: Conor Dooley Signed-off-by: Conor Dooley --- drivers/clk/Kconfig | 4 +- drivers/clk/Makefile | 2 +- drivers/clk/microchip/Kconfig | 10 + drivers/clk/microchip/Makefile | 1 + drivers/clk/microchip/clk-mpfs.c | 382 +++++++++++++++++++++++++++++++ 5 files changed, 395 insertions(+), 4 deletions(-) create mode 100644 drivers/clk/microchip/Kconfig create mode 100644 drivers/clk/microchip/clk-mpfs.c diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index ad4256d54361..678a865021e2 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -330,9 +330,6 @@ config COMMON_CLK_PXA help Support for the Marvell PXA SoC. -config COMMON_CLK_PIC32 - def_bool COMMON_CLK && MACH_PIC32 - config COMMON_CLK_OXNAS bool "Clock driver for the OXNAS SoC Family" depends on ARCH_OXNAS || COMPILE_TEST @@ -407,6 +404,7 @@ source "drivers/clk/keystone/Kconfig" source "drivers/clk/mediatek/Kconfig" source "drivers/clk/meson/Kconfig" source "drivers/clk/mstar/Kconfig" +source "drivers/clk/microchip/Kconfig" source "drivers/clk/mvebu/Kconfig" source "drivers/clk/pistachio/Kconfig" source "drivers/clk/qcom/Kconfig" diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 16e588630472..61271926b16b 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -91,7 +91,7 @@ obj-$(CONFIG_ARCH_KEYSTONE) += keystone/ obj-$(CONFIG_MACH_LOONGSON32) += loongson1/ obj-y += mediatek/ obj-$(CONFIG_ARCH_MESON) += meson/ -obj-$(CONFIG_MACH_PIC32) += microchip/ +obj-y += microchip/ ifeq ($(CONFIG_COMMON_CLK), y) obj-$(CONFIG_ARCH_MMP) += mmp/ endif diff --git a/drivers/clk/microchip/Kconfig b/drivers/clk/microchip/Kconfig new file mode 100644 index 000000000000..e1af380d8c9c --- /dev/null +++ b/drivers/clk/microchip/Kconfig @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 + +config COMMON_CLK_PIC32 + def_bool COMMON_CLK && MACH_PIC32 + +config MCHP_CLK_MPFS + bool "Clk driver for PolarFire SoC" + depends on (RISCV && SOC_MICROCHIP_POLARFIRE) || COMPILE_TEST + help + Supports Clock Configuration for PolarFire SoC \ No newline at end of file diff --git a/drivers/clk/microchip/Makefile b/drivers/clk/microchip/Makefile index f34b247e870f..5fa6dcf30a9a 100644 --- a/drivers/clk/microchip/Makefile +++ b/drivers/clk/microchip/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_COMMON_CLK_PIC32) += clk-core.o obj-$(CONFIG_PIC32MZDA) += clk-pic32mzda.o +obj-$(CONFIG_MCHP_CLK_MPFS) += clk-mpfs.o diff --git a/drivers/clk/microchip/clk-mpfs.c b/drivers/clk/microchip/clk-mpfs.c new file mode 100644 index 000000000000..eec461b906d8 --- /dev/null +++ b/drivers/clk/microchip/clk-mpfs.c @@ -0,0 +1,382 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Daire McNamara, + * Copyright (C) 2020 Microchip Technology Inc. All rights reserved. + */ +#include +#include +#include +#include +#include +#include + +/* address offset of control registers */ +#define REG_CLOCK_CONFIG_CR 0x08u +#define REG_SUBBLK_CLOCK_CR 0x84u +#define REG_SUBBLK_RESET_CR 0x88u + +struct mpfs_clock_data { + void __iomem *base; + struct clk_hw_onecell_data hw_data; +}; + +struct mpfs_cfg_clock { + const struct clk_div_table *table; + unsigned int id; + u8 shift; + u8 width; +}; + +struct mpfs_cfg_hw_clock { + struct mpfs_cfg_clock cfg; + void __iomem *sys_base; + struct clk_hw hw; + struct clk_init_data init; +}; + +#define to_mpfs_cfg_clk(_hw) container_of(_hw, struct mpfs_cfg_hw_clock, hw) + +struct mpfs_periph_clock { + unsigned int id; + u8 shift; +}; + +struct mpfs_periph_hw_clock { + struct mpfs_periph_clock periph; + void __iomem *sys_base; + struct clk_hw hw; +}; + +#define to_mpfs_periph_clk(_hw) container_of(_hw, struct mpfs_periph_hw_clock, hw) + +/* + * mpfs_clk_lock prevents anything else from writing to the + * mpfs clk block while a software locked register is being written. + */ +static DEFINE_SPINLOCK(mpfs_clk_lock); + +static const struct clk_parent_data mpfs_cfg_parent[] = { + { .index = 0 }, +}; + +static const struct clk_div_table mpfs_div_cpu_axi_table[] = { + { 0, 1 }, { 1, 2 }, { 2, 4 }, { 3, 8 }, + { 0, 0 } +}; + +static const struct clk_div_table mpfs_div_ahb_table[] = { + { 1, 2 }, { 2, 4}, { 3, 8 }, + { 0, 0 } +}; + +static unsigned long mpfs_cfg_clk_recalc_rate(struct clk_hw *hw, unsigned long prate) +{ + struct mpfs_cfg_hw_clock *cfg_hw = to_mpfs_cfg_clk(hw); + struct mpfs_cfg_clock *cfg = &cfg_hw->cfg; + void __iomem *base_addr = cfg_hw->sys_base; + u32 val; + + val = readl_relaxed(base_addr + REG_CLOCK_CONFIG_CR) >> cfg->shift; + val &= clk_div_mask(cfg->width); + + return prate / (1u << val); +} + +static long mpfs_cfg_clk_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate) +{ + struct mpfs_cfg_hw_clock *cfg_hw = to_mpfs_cfg_clk(hw); + struct mpfs_cfg_clock *cfg = &cfg_hw->cfg; + + return divider_round_rate(hw, rate, prate, cfg->table, cfg->width, CLK_DIVIDER_ONE_BASED); +} + +static int mpfs_cfg_clk_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long prate) +{ + struct mpfs_cfg_hw_clock *cfg_hw = to_mpfs_cfg_clk(hw); + struct mpfs_cfg_clock *cfg = &cfg_hw->cfg; + void __iomem *base_addr = cfg_hw->sys_base; + unsigned long flags; + u32 val; + int divider_setting; + + divider_setting = divider_get_val(rate, prate, cfg->table, cfg->width, + CLK_DIVIDER_ONE_BASED); + + if (divider_setting < 0) + return divider_setting; + + spin_lock_irqsave(&mpfs_clk_lock, flags); + + val = readl_relaxed(base_addr + REG_CLOCK_CONFIG_CR); + val &= ~(clk_div_mask(cfg->width) << cfg_hw->cfg.shift); + val |= divider_setting << cfg->shift; + writel_relaxed(val, base_addr + REG_CLOCK_CONFIG_CR); + + spin_unlock_irqrestore(&mpfs_clk_lock, flags); + + return 0; +} + +static const struct clk_ops mpfs_clk_cfg_ops = { + .recalc_rate = mpfs_cfg_clk_recalc_rate, + .round_rate = mpfs_cfg_clk_round_rate, + .set_rate = mpfs_cfg_clk_set_rate, +}; + +#define CLK_CFG(_id, _name, _parent, _shift, _width, _table, _flags) { \ + .cfg.id = _id, \ + .cfg.shift = _shift, \ + .cfg.width = _width, \ + .cfg.table = _table, \ + .hw.init = CLK_HW_INIT_PARENTS_DATA(_name, _parent, &mpfs_clk_cfg_ops, \ + _flags), \ +} + +static struct mpfs_cfg_hw_clock mpfs_cfg_clks[] = { + CLK_CFG(CLK_CPU, "clk_cpu", mpfs_cfg_parent, 0, 2, mpfs_div_cpu_axi_table, 0), + CLK_CFG(CLK_AXI, "clk_axi", mpfs_cfg_parent, 2, 2, mpfs_div_cpu_axi_table, 0), + CLK_CFG(CLK_AHB, "clk_ahb", mpfs_cfg_parent, 4, 2, mpfs_div_ahb_table, 0), +}; + +static int mpfs_clk_register_cfg(struct device *dev, struct mpfs_cfg_hw_clock *cfg_hw, + void __iomem *sys_base) +{ + cfg_hw->sys_base = sys_base; + + return devm_clk_hw_register(dev, &cfg_hw->hw); +} + +static int mpfs_clk_register_cfgs(struct device *dev, struct mpfs_cfg_hw_clock *cfg_hws, + unsigned int num_clks, struct mpfs_clock_data *data) +{ + void __iomem *sys_base = data->base; + unsigned int i, id; + int ret; + + for (i = 0; i < num_clks; i++) { + struct mpfs_cfg_hw_clock *cfg_hw = &cfg_hws[i]; + + ret = mpfs_clk_register_cfg(dev, cfg_hw, sys_base); + if (ret) + return dev_err_probe(dev, ret, "failed to register clock id: %d\n", + cfg_hw->cfg.id); + + id = cfg_hws[i].cfg.id; + data->hw_data.hws[id] = &cfg_hw->hw; + } + + return 0; +} + +static int mpfs_periph_clk_enable(struct clk_hw *hw) +{ + struct mpfs_periph_hw_clock *periph_hw = to_mpfs_periph_clk(hw); + struct mpfs_periph_clock *periph = &periph_hw->periph; + void __iomem *base_addr = periph_hw->sys_base; + u32 reg, val; + unsigned long flags; + + spin_lock_irqsave(&mpfs_clk_lock, flags); + + reg = readl_relaxed(base_addr + REG_SUBBLK_RESET_CR); + val = reg & ~(1u << periph->shift); + writel_relaxed(val, base_addr + REG_SUBBLK_RESET_CR); + + reg = readl_relaxed(base_addr + REG_SUBBLK_CLOCK_CR); + val = reg | (1u << periph->shift); + writel_relaxed(val, base_addr + REG_SUBBLK_CLOCK_CR); + + spin_unlock_irqrestore(&mpfs_clk_lock, flags); + + return 0; +} + +static void mpfs_periph_clk_disable(struct clk_hw *hw) +{ + struct mpfs_periph_hw_clock *periph_hw = to_mpfs_periph_clk(hw); + struct mpfs_periph_clock *periph = &periph_hw->periph; + void __iomem *base_addr = periph_hw->sys_base; + u32 reg, val; + unsigned long flags; + + spin_lock_irqsave(&mpfs_clk_lock, flags); + + reg = readl_relaxed(base_addr + REG_SUBBLK_RESET_CR); + val = reg | (1u << periph->shift); + writel_relaxed(val, base_addr + REG_SUBBLK_RESET_CR); + + reg = readl_relaxed(base_addr + REG_SUBBLK_CLOCK_CR); + val = reg & ~(1u << periph->shift); + writel_relaxed(val, base_addr + REG_SUBBLK_CLOCK_CR); + + spin_unlock_irqrestore(&mpfs_clk_lock, flags); +} + +static int mpfs_periph_clk_is_enabled(struct clk_hw *hw) +{ + struct mpfs_periph_hw_clock *periph_hw = to_mpfs_periph_clk(hw); + struct mpfs_periph_clock *periph = &periph_hw->periph; + void __iomem *base_addr = periph_hw->sys_base; + u32 reg; + + reg = readl_relaxed(base_addr + REG_SUBBLK_RESET_CR); + if ((reg & (1u << periph->shift)) == 0u) { + reg = readl_relaxed(base_addr + REG_SUBBLK_CLOCK_CR); + if (reg & (1u << periph->shift)) + return 1; + } + + return 0; +} + +static const struct clk_ops mpfs_periph_clk_ops = { + .enable = mpfs_periph_clk_enable, + .disable = mpfs_periph_clk_disable, + .is_enabled = mpfs_periph_clk_is_enabled, +}; + +#define CLK_PERIPH(_id, _name, _parent, _shift, _flags) { \ + .periph.id = _id, \ + .periph.shift = _shift, \ + .hw.init = CLK_HW_INIT_HW(_name, _parent, &mpfs_periph_clk_ops, \ + _flags), \ +} + +#define PARENT_CLK(PARENT) (&mpfs_cfg_clks[CLK_##PARENT].hw) + +/* + * Critical clocks: + * - CLK_ENVM: reserved by hart software services (hss) superloop monitor/m mode interrupt + * trap handler + * - CLK_MMUART0: reserved by the hss + * - CLK_DDRC: provides clock to the ddr subsystem + * - CLK_FICx: these provide clocks for sections of the fpga fabric, disabling them would + * cause the fabric to go into reset + */ + +static struct mpfs_periph_hw_clock mpfs_periph_clks[] = { + CLK_PERIPH(CLK_ENVM, "clk_periph_envm", PARENT_CLK(AHB), 0, CLK_IS_CRITICAL), + CLK_PERIPH(CLK_MAC0, "clk_periph_mac0", PARENT_CLK(AHB), 1, 0), + CLK_PERIPH(CLK_MAC1, "clk_periph_mac1", PARENT_CLK(AHB), 2, 0), + CLK_PERIPH(CLK_MMC, "clk_periph_mmc", PARENT_CLK(AHB), 3, 0), + CLK_PERIPH(CLK_TIMER, "clk_periph_timer", PARENT_CLK(AHB), 4, 0), + CLK_PERIPH(CLK_MMUART0, "clk_periph_mmuart0", PARENT_CLK(AHB), 5, CLK_IS_CRITICAL), + CLK_PERIPH(CLK_MMUART1, "clk_periph_mmuart1", PARENT_CLK(AHB), 6, 0), + CLK_PERIPH(CLK_MMUART2, "clk_periph_mmuart2", PARENT_CLK(AHB), 7, 0), + CLK_PERIPH(CLK_MMUART3, "clk_periph_mmuart3", PARENT_CLK(AHB), 8, 0), + CLK_PERIPH(CLK_MMUART4, "clk_periph_mmuart4", PARENT_CLK(AHB), 9, 0), + CLK_PERIPH(CLK_SPI0, "clk_periph_spi0", PARENT_CLK(AHB), 10, 0), + CLK_PERIPH(CLK_SPI1, "clk_periph_spi1", PARENT_CLK(AHB), 11, 0), + CLK_PERIPH(CLK_I2C0, "clk_periph_i2c0", PARENT_CLK(AHB), 12, 0), + CLK_PERIPH(CLK_I2C1, "clk_periph_i2c1", PARENT_CLK(AHB), 13, 0), + CLK_PERIPH(CLK_CAN0, "clk_periph_can0", PARENT_CLK(AHB), 14, 0), + CLK_PERIPH(CLK_CAN1, "clk_periph_can1", PARENT_CLK(AHB), 15, 0), + CLK_PERIPH(CLK_USB, "clk_periph_usb", PARENT_CLK(AHB), 16, 0), + CLK_PERIPH(CLK_RTC, "clk_periph_rtc", PARENT_CLK(AHB), 18, 0), + CLK_PERIPH(CLK_QSPI, "clk_periph_qspi", PARENT_CLK(AHB), 19, 0), + CLK_PERIPH(CLK_GPIO0, "clk_periph_gpio0", PARENT_CLK(AHB), 20, 0), + CLK_PERIPH(CLK_GPIO1, "clk_periph_gpio1", PARENT_CLK(AHB), 21, 0), + CLK_PERIPH(CLK_GPIO2, "clk_periph_gpio2", PARENT_CLK(AHB), 22, 0), + CLK_PERIPH(CLK_DDRC, "clk_periph_ddrc", PARENT_CLK(AHB), 23, CLK_IS_CRITICAL), + CLK_PERIPH(CLK_FIC0, "clk_periph_fic0", PARENT_CLK(AHB), 24, CLK_IS_CRITICAL), + CLK_PERIPH(CLK_FIC1, "clk_periph_fic1", PARENT_CLK(AHB), 25, CLK_IS_CRITICAL), + CLK_PERIPH(CLK_FIC2, "clk_periph_fic2", PARENT_CLK(AHB), 26, CLK_IS_CRITICAL), + CLK_PERIPH(CLK_FIC3, "clk_periph_fic3", PARENT_CLK(AHB), 27, CLK_IS_CRITICAL), + CLK_PERIPH(CLK_ATHENA, "clk_periph_athena", PARENT_CLK(AHB), 28, 0), + CLK_PERIPH(CLK_CFM, "clk_periph_cfm", PARENT_CLK(AHB), 29, 0), +}; + +static int mpfs_clk_register_periph(struct device *dev, struct mpfs_periph_hw_clock *periph_hw, + void __iomem *sys_base) +{ + periph_hw->sys_base = sys_base; + + return devm_clk_hw_register(dev, &periph_hw->hw); +} + +static int mpfs_clk_register_periphs(struct device *dev, struct mpfs_periph_hw_clock *periph_hws, + int num_clks, struct mpfs_clock_data *data) +{ + void __iomem *sys_base = data->base; + unsigned int i, id; + int ret; + + for (i = 0; i < num_clks; i++) { + struct mpfs_periph_hw_clock *periph_hw = &periph_hws[i]; + + ret = mpfs_clk_register_periph(dev, periph_hw, sys_base); + if (ret) + return dev_err_probe(dev, ret, "failed to register clock id: %d\n", + periph_hw->periph.id); + + id = periph_hws[i].periph.id; + data->hw_data.hws[id] = &periph_hw->hw; + } + + return 0; +} + +static int mpfs_clk_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mpfs_clock_data *clk_data; + unsigned int num_clks; + int ret; + + /* CLK_RESERVED is not part of cfg_clks nor periph_clks, so add 1 */ + num_clks = ARRAY_SIZE(mpfs_cfg_clks) + ARRAY_SIZE(mpfs_periph_clks) + 1; + + clk_data = devm_kzalloc(dev, struct_size(clk_data, hw_data.hws, num_clks), GFP_KERNEL); + if (!clk_data) + return -ENOMEM; + + clk_data->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(clk_data->base)) + return PTR_ERR(clk_data->base); + + clk_data->hw_data.num = num_clks; + + ret = mpfs_clk_register_cfgs(dev, mpfs_cfg_clks, ARRAY_SIZE(mpfs_cfg_clks), clk_data); + if (ret) + return ret; + + ret = mpfs_clk_register_periphs(dev, mpfs_periph_clks, ARRAY_SIZE(mpfs_periph_clks), + clk_data); + if (ret) + return ret; + + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, &clk_data->hw_data); + if (ret) + return ret; + + return ret; +} + +static const struct of_device_id mpfs_clk_of_match_table[] = { + { .compatible = "microchip,mpfs-clkcfg", }, + {} +}; +MODULE_DEVICE_TABLE(of, mpfs_clk_match_table); + +static struct platform_driver mpfs_clk_driver = { + .probe = mpfs_clk_probe, + .driver = { + .name = "microchip-mpfs-clkcfg", + .of_match_table = mpfs_clk_of_match_table, + }, +}; + +static int __init clk_mpfs_init(void) +{ + return platform_driver_register(&mpfs_clk_driver); +} +core_initcall(clk_mpfs_init); + +static void __exit clk_mpfs_exit(void) +{ + platform_driver_unregister(&mpfs_clk_driver); +} +module_exit(clk_mpfs_exit); + +MODULE_DESCRIPTION("Microchip PolarFire SoC Clock Driver"); +MODULE_LICENSE("GPL v2");