Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754933AbdLGNDp (ORCPT ); Thu, 7 Dec 2017 08:03:45 -0500 Received: from sci-ig2.spreadtrum.com ([222.66.158.135]:28899 "EHLO SHSQR01.spreadtrum.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754626AbdLGNDm (ORCPT ); Thu, 7 Dec 2017 08:03:42 -0500 From: Chunyan Zhang To: Stephen Boyd , Michael Turquette , Rob Herring , Mark Rutland CC: Catalin Marinas , Will Deacon , , , , , Arnd Bergmann , Mark Brown , Xiaolong Zhang , Ben Li , Orson Zhai , Chunyan Zhang Subject: [PATCH V7 02/12] clk: sprd: Add common infrastructure Date: Thu, 7 Dec 2017 20:57:05 +0800 Message-ID: <20171207125715.16160-3-chunyan.zhang@spreadtrum.com> X-Mailer: git-send-email 2.12.2 In-Reply-To: <20171207125715.16160-1-chunyan.zhang@spreadtrum.com> References: <20171207125715.16160-1-chunyan.zhang@spreadtrum.com> MIME-Version: 1.0 Content-Type: text/plain X-MAIL: SHSQR01.spreadtrum.com vB7D2ZjO069247 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5579 Lines: 208 Added Spreadtrum's clock driver framework together with common structures and interface functions. Signed-off-by: Chunyan Zhang --- drivers/clk/Kconfig | 1 + drivers/clk/Makefile | 1 + drivers/clk/sprd/Kconfig | 4 ++ drivers/clk/sprd/Makefile | 3 ++ drivers/clk/sprd/common.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/clk/sprd/common.h | 38 +++++++++++++++++++ 6 files changed, 143 insertions(+) create mode 100644 drivers/clk/sprd/Kconfig create mode 100644 drivers/clk/sprd/Makefile create mode 100644 drivers/clk/sprd/common.c create mode 100644 drivers/clk/sprd/common.h diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 1c4e1aa..ce1a32be 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -236,6 +236,7 @@ source "drivers/clk/mvebu/Kconfig" source "drivers/clk/qcom/Kconfig" source "drivers/clk/renesas/Kconfig" source "drivers/clk/samsung/Kconfig" +source "drivers/clk/sprd/Kconfig" source "drivers/clk/sunxi-ng/Kconfig" source "drivers/clk/tegra/Kconfig" source "drivers/clk/ti/Kconfig" diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index f7f761b..d880d13 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -85,6 +85,7 @@ obj-$(CONFIG_COMMON_CLK_SAMSUNG) += samsung/ obj-$(CONFIG_ARCH_SIRF) += sirf/ obj-$(CONFIG_ARCH_SOCFPGA) += socfpga/ obj-$(CONFIG_PLAT_SPEAR) += spear/ +obj-$(CONFIG_ARCH_SPRD) += sprd/ obj-$(CONFIG_ARCH_STI) += st/ obj-$(CONFIG_ARCH_SUNXI) += sunxi/ obj-$(CONFIG_ARCH_SUNXI) += sunxi-ng/ diff --git a/drivers/clk/sprd/Kconfig b/drivers/clk/sprd/Kconfig new file mode 100644 index 0000000..67a3287 --- /dev/null +++ b/drivers/clk/sprd/Kconfig @@ -0,0 +1,4 @@ +config SPRD_COMMON_CLK + tristate "Clock support for Spreadtrum SoCs" + depends on ARCH_SPRD || COMPILE_TEST + default ARCH_SPRD diff --git a/drivers/clk/sprd/Makefile b/drivers/clk/sprd/Makefile new file mode 100644 index 0000000..74f4b80 --- /dev/null +++ b/drivers/clk/sprd/Makefile @@ -0,0 +1,3 @@ +obj-$(CONFIG_SPRD_COMMON_CLK) += clk-sprd.o + +clk-sprd-y += common.o diff --git a/drivers/clk/sprd/common.c b/drivers/clk/sprd/common.c new file mode 100644 index 0000000..e038b044 --- /dev/null +++ b/drivers/clk/sprd/common.c @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Spreadtrum clock infrastructure +// +// Copyright (C) 2017 Spreadtrum, Inc. +// Author: Chunyan Zhang + +#include +#include +#include +#include +#include + +#include "common.h" + +static const struct regmap_config sprdclk_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = 0xffff, + .fast_io = true, +}; + +static void sprd_clk_set_regmap(const struct sprd_clk_desc *desc, + struct regmap *regmap) +{ + int i; + struct sprd_clk_common *cclk; + + for (i = 0; i < desc->num_clk_clks; i++) { + cclk = desc->clk_clks[i]; + if (!cclk) + continue; + + cclk->regmap = regmap; + } +} + +int sprd_clk_regmap_init(struct platform_device *pdev, + const struct sprd_clk_desc *desc) +{ + void __iomem *base; + struct device_node *node = pdev->dev.of_node; + struct regmap *regmap; + + if (of_find_property(node, "sprd,syscon", NULL)) { + regmap = syscon_regmap_lookup_by_phandle(node, "sprd,syscon"); + if (IS_ERR_OR_NULL(regmap)) { + pr_err("%s: failed to get syscon regmap\n", __func__); + return PTR_ERR(regmap); + } + } else { + base = of_iomap(node, 0); + regmap = devm_regmap_init_mmio(&pdev->dev, base, + &sprdclk_regmap_config); + if (IS_ERR_OR_NULL(regmap)) { + pr_err("failed to init regmap\n"); + return PTR_ERR(regmap); + } + } + + sprd_clk_set_regmap(desc, regmap); + + return 0; +} +EXPORT_SYMBOL_GPL(sprd_clk_regmap_init); + +int sprd_clk_probe(struct device *dev, struct clk_hw_onecell_data *clkhw) +{ + int i, ret; + struct clk_hw *hw; + + for (i = 0; i < clkhw->num; i++) { + + hw = clkhw->hws[i]; + + if (!hw) + continue; + + ret = devm_clk_hw_register(dev, hw); + if (ret) { + dev_err(dev, "Couldn't register clock %d - %s\n", + i, hw->init->name); + return ret; + } + } + + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clkhw); + if (ret) + dev_err(dev, "Failed to add clock provider\n"); + + return ret; +} +EXPORT_SYMBOL_GPL(sprd_clk_probe); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/clk/sprd/common.h b/drivers/clk/sprd/common.h new file mode 100644 index 0000000..abd9ff5 --- /dev/null +++ b/drivers/clk/sprd/common.h @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Spreadtrum clock infrastructure +// +// Copyright (C) 2017 Spreadtrum, Inc. +// Author: Chunyan Zhang + +#ifndef _SPRD_CLK_COMMON_H_ +#define _SPRD_CLK_COMMON_H_ + +#include +#include +#include + +struct device_node; + +struct sprd_clk_common { + struct regmap *regmap; + u32 reg; + struct clk_hw hw; +}; + +struct sprd_clk_desc { + struct sprd_clk_common **clk_clks; + unsigned long num_clk_clks; + struct clk_hw_onecell_data *hw_clks; +}; + +static inline struct sprd_clk_common * + hw_to_sprd_clk_common(const struct clk_hw *hw) +{ + return container_of(hw, struct sprd_clk_common, hw); +} +int sprd_clk_regmap_init(struct platform_device *pdev, + const struct sprd_clk_desc *desc); +int sprd_clk_probe(struct device *dev, struct clk_hw_onecell_data *clkhw); + +#endif /* _SPRD_CLK_COMMON_H_ */ -- 2.7.4