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Mon, 02 Oct 2017 11:48:25 +0100 (BST) From: Marek Szyprowski To: linux-clk@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: Marek Szyprowski , Sylwester Nawrocki , Chanwoo Choi , Inki Dae , Krzysztof Kozlowski , Bartlomiej Zolnierkiewicz , devicetree@vger.kernel.org Subject: [PATCH 2/4] clk: samsung: Add a separate driver for Exynos4412 ISP clocks Date: Mon, 02 Oct 2017 12:47:57 +0200 Message-id: <20171002104759.25944-3-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.14.2 In-reply-to: <20171002104759.25944-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrHIsWRmVeSWpSXmKPExsWy7djPc7qVkpciDQ7v0bTYOGM9q8X1L89Z LeYfOcdqMen+BBaL8+c3sFt87LnHajHj/D4mi7VH7rJbHH7TzurA6bFpVSebR9+WVYwenzfJ BTBHcdmkpOZklqUW6dslcGWcWLOetaAvvOLD7iXMDYynPbsYOTkkBEwk2rbPY4GwxSQu3FvP 1sXIxSEksIxRou3vRmYI5zOjxKV1T9hgOl6un80EV7X25WlWCKeBSaL7zDJ2kCo2AUOJrrdd YB0iAg4Snz+9ZgQpYhZYxCTR/GkiK0hCWCBEon/3fbAiFgFVid6rEDavgK3E9OMLGCHWyUu8 X3AfzOYUsJNoPrAS6tgJbBIbnmpA2C4SZ05fhTpPWOLV8S3sELaMRGfHQSYIu59RoqlVG8Ke wShx7i0vhG0tcfj4RbB7mAX4JCZtmw70MwdQnFeio00IosRD4tLUJlYI21Hi2Mmd7BAPT2SU +PSijX0Co/QCRoZVjCKppcW56anFhnrFibnFpXnpesn5uZsYgbF6+t/x9zsYnzaHHGIU4GBU 4uFtMLsYKcSaWFZcmXuIUYKDWUmEl5ftUqQQb0piZVVqUX58UWlOavEhRmkOFiVxXtuotkgh gfTEktTs1NSC1CKYLBMHp1QD45SyadP2yEycJ/opquDxhguhXxf1HrRvuDl9gZD9v2ueBaU9 Dxee37P/zLNvKp8C/3NnPr/Dee9C84bty69s3GR1hldiSz0zz9afh77/0Tx68nJDUHRCI+/T fJfY/6rnsifK6z0P2pCwIUhAbsdW6Y73bPtNmEpehO9PeriWfeN3Kb7U6b3zjt5UYinOSDTU Yi4qTgQAWZJMvNECAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprMLMWRmVeSWpSXmKPExsVy+t/xq7qVkpciDRbeFLDYOGM9q8X1L89Z LeYfOcdqMen+BBaL8+c3sFt87LnHajHj/D4mi7VH7rJbHH7TzurA6bFpVSebR9+WVYwenzfJ BTBHcdmkpOZklqUW6dslcGWcWLOetaAvvOLD7iXMDYynPbsYOTkkBEwkXq6fzQRhi0lcuLee rYuRi0NIYAmjxJyzbewgCSGBJiaJNYvBGtgEDCW63naxgdgiAg4Snz+9ZgRpYBZYxiTx+Mo2 FpCEsECIRP/u+2BFLAKqEr1XIWxeAVuJ6ccXMEJsk5d4v+A+mM0pYCfRfGAlC8QyW4m5azez T2DkXcDIsIpRJLW0ODc9t9hQrzgxt7g0L10vOT93EyMwqLYd+7l5B+OljcGHGAU4GJV4eDVM LkYKsSaWFVfmHmKU4GBWEuHlZbsUKcSbklhZlVqUH19UmpNafIhRmoNFSZy3d8/qSCGB9MSS 1OzU1ILUIpgsEwenVANjiphOaJmFo6p7c1tHg1nd9F/LWssdf5abxfmyv1b89KDtCQO/gGwL W9PU0sUn3CdZpp0WMY2IYfob4Pf2/6sZk1r8E6VDxL8xzIm0vqAu/6p3RsRi1mu/+Oq2Ox8I 2iD84q795NfMCWICuu9MIqolhHRVFQ6VGOedvvh+006/F+3LZny6tkiJpTgj0VCLuag4EQAT XnvaJgIAAA== X-CMS-MailID: 20171002104825eucas1p1fc099af751d832f4fb1b040a2eaa1c52 X-Msg-Generator: CA X-Sender-IP: 182.198.249.179 X-Local-Sender: =?utf-8?q?Marek_Szyprowski=1BSRPOL-Kernel_=28TP=29=1B?= =?utf-8?b?7IK87ISx7KCE7J6QG1NlbmlvciBTb2Z0d2FyZSBFbmdpbmVlcg==?= X-Global-Sender: =?utf-8?q?Marek_Szyprowski=1BSRPOL-Kernel_=28TP=29=1BSam?= =?utf-8?q?sung_Electronics=1BSenior_Software_Engineer?= X-Sender-Code: =?utf-8?q?C10=1BEHQ=1BC10CD02CD027392?= CMS-TYPE: 201P X-CMS-RootMailID: 20171002104825eucas1p1fc099af751d832f4fb1b040a2eaa1c52 X-RootMTR: 20171002104825eucas1p1fc099af751d832f4fb1b040a2eaa1c52 References: <20171002104759.25944-1-m.szyprowski@samsung.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Some registers for the Exynos 4412 ISP (Camera subsystem) clocks are partially located in the SOC area, which belongs to ISP power domain. Because those registers are also located in a different memory region than the main clock controller, support for them can be provided by a separate clock controller. This in turn allows to almost seamlessly make it aware of the power domain using recently introduced runtime PM support for clocks. Signed-off-by: Marek Szyprowski --- .../devicetree/bindings/clock/exynos4-clock.txt | 27 ++++ drivers/clk/samsung/Makefile | 1 + drivers/clk/samsung/clk-exynos4412-isp.c | 179 +++++++++++++++++++++ include/dt-bindings/clock/exynos4.h | 35 ++++ 4 files changed, 242 insertions(+) create mode 100644 drivers/clk/samsung/clk-exynos4412-isp.c -- 2.14.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/Documentation/devicetree/bindings/clock/exynos4-clock.txt b/Documentation/devicetree/bindings/clock/exynos4-clock.txt index f5a5b19ed3b2..9b260e0d1e66 100644 --- a/Documentation/devicetree/bindings/clock/exynos4-clock.txt +++ b/Documentation/devicetree/bindings/clock/exynos4-clock.txt @@ -41,3 +41,30 @@ Example 2: UART controller node that consumes the clock generated by the clock clocks = <&clock CLK_UART2>, <&clock CLK_SCLK_UART2>; clock-names = "uart", "clk_uart_baud0"; }; + +Exynos4412 SoC contains some additional clocks for FIMC-ISP (Camera ISP) +subsystem. Registers for those clocks are partially located in the SOC area, +which belongs to ISP power domain. Because those registers are also located +in a different memory region than the main clock controller, a separate clock +controller has to be defined for handling them. The compatible string to such +controller is "samsung,exynos4412-isp-clock". It also has two input clocks +from the main Exynos4412 clock controller: "aclk200" and "aclk400_mcuisp". +The ISP clock controller has to be linked with respective ISP power domain +(for more information, see Samsung Exynos power domains bindings). + +Example 3: An example of a clock controllers for Exynos4412 SoCs. + + clock: clock-controller@10030000 { + compatible = "samsung,exynos4412-clock"; + reg = <0x10030000 0x18000>; + #clock-cells = <1>; + }; + + isp_clock: clock-controller@10048000 { + compatible = "samsung,exynos4412-isp-clock"; + reg = <0x10048000 0x1000>; + #clock-cells = <1>; + power-domains = <&pd_isp>; + clocks = <&clock CLK_ACLK200>, <&clock CLK_ACLK400_MCUISP>; + clock-names = "aclk200", "aclk400_mcuisp"; + }; diff --git a/drivers/clk/samsung/Makefile b/drivers/clk/samsung/Makefile index 7afc21dc374e..8a67a3bb6803 100644 --- a/drivers/clk/samsung/Makefile +++ b/drivers/clk/samsung/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_COMMON_CLK) += clk.o clk-pll.o clk-cpu.o obj-$(CONFIG_SOC_EXYNOS3250) += clk-exynos3250.o obj-$(CONFIG_ARCH_EXYNOS4) += clk-exynos4.o +obj-$(CONFIG_ARCH_EXYNOS4) += clk-exynos4412-isp.o obj-$(CONFIG_SOC_EXYNOS5250) += clk-exynos5250.o obj-$(CONFIG_SOC_EXYNOS5260) += clk-exynos5260.o obj-$(CONFIG_SOC_EXYNOS5410) += clk-exynos5410.o diff --git a/drivers/clk/samsung/clk-exynos4412-isp.c b/drivers/clk/samsung/clk-exynos4412-isp.c new file mode 100644 index 000000000000..6712db52e047 --- /dev/null +++ b/drivers/clk/samsung/clk-exynos4412-isp.c @@ -0,0 +1,179 @@ +/* + * Copyright (c) 2017 Samsung Electronics Co., Ltd. + * Author: Marek Szyprowski + * + * 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. + * + * Common Clock Framework support for Exynos4412 ISP module. +*/ + +#include +#include +#include +#include +#include +#include +#include + +#include "clk.h" + +/* Exynos4x12 specific registers, which belong to ISP power domain */ +#define E4X12_DIV_ISP0 0x0300 +#define E4X12_DIV_ISP1 0x0304 +#define E4X12_GATE_ISP0 0x0800 +#define E4X12_GATE_ISP1 0x0804 + +/* + * Support for CMU save/restore across system suspends + */ +static struct samsung_clk_reg_dump *exynos4x12_save_isp; + +static const unsigned long exynos4x12_clk_isp_save[] __initconst = { + E4X12_DIV_ISP0, + E4X12_DIV_ISP1, + E4X12_GATE_ISP0, + E4X12_GATE_ISP1, +}; + +PNAME(mout_user_aclk400_mcuisp_p4x12) = {"fin_pll", "div_aclk400_mcuisp", }; + +static struct samsung_div_clock exynos4x12_isp_div_clks[] = { + DIV(CLK_ISP_DIV_ISP0, "div_isp0", "aclk200", E4X12_DIV_ISP0, 0, 3), + DIV(CLK_ISP_DIV_ISP1, "div_isp1", "aclk200", E4X12_DIV_ISP0, 4, 3), + DIV(CLK_ISP_DIV_MCUISP0, "div_mcuisp0", "aclk400_mcuisp", + E4X12_DIV_ISP1, 4, 3), + DIV(CLK_ISP_DIV_MCUISP1, "div_mcuisp1", "div_mcuisp0", + E4X12_DIV_ISP1, 8, 3), + DIV(0, "div_mpwm", "div_isp1", E4X12_DIV_ISP1, 0, 3), +}; + +static struct samsung_gate_clock exynos4x12_isp_gate_clks[] = { + GATE(CLK_ISP_FIMC_ISP, "isp", "aclk200", E4X12_GATE_ISP0, 0, 0, 0), + GATE(CLK_ISP_FIMC_DRC, "drc", "aclk200", E4X12_GATE_ISP0, 1, 0, 0), + GATE(CLK_ISP_FIMC_FD, "fd", "aclk200", E4X12_GATE_ISP0, 2, 0, 0), + GATE(CLK_ISP_FIMC_LITE0, "lite0", "aclk200", E4X12_GATE_ISP0, 3, 0, 0), + GATE(CLK_ISP_FIMC_LITE1, "lite1", "aclk200", E4X12_GATE_ISP0, 4, 0, 0), + GATE(CLK_ISP_MCUISP, "mcuisp", "aclk200", E4X12_GATE_ISP0, 5, 0, 0), + GATE(CLK_ISP_GICISP, "gicisp", "aclk200", E4X12_GATE_ISP0, 7, 0, 0), + GATE(CLK_ISP_SMMU_ISP, "smmu_isp", "aclk200", E4X12_GATE_ISP0, 8, 0, 0), + GATE(CLK_ISP_SMMU_DRC, "smmu_drc", "aclk200", E4X12_GATE_ISP0, 9, 0, 0), + GATE(CLK_ISP_SMMU_FD, "smmu_fd", "aclk200", E4X12_GATE_ISP0, 10, 0, 0), + GATE(CLK_ISP_SMMU_LITE0, "smmu_lite0", "aclk200", E4X12_GATE_ISP0, 11, + 0, 0), + GATE(CLK_ISP_SMMU_LITE1, "smmu_lite1", "aclk200", E4X12_GATE_ISP0, 12, + 0, 0), + GATE(CLK_ISP_PPMUISPMX, "ppmuispmx", "aclk200", E4X12_GATE_ISP0, 20, + 0, 0), + GATE(CLK_ISP_PPMUISPX, "ppmuispx", "aclk200", E4X12_GATE_ISP0, 21, + 0, 0), + GATE(CLK_ISP_MCUCTL_ISP, "mcuctl_isp", "aclk200", E4X12_GATE_ISP0, 23, + 0, 0), + GATE(CLK_ISP_MPWM_ISP, "mpwm_isp", "aclk200", E4X12_GATE_ISP0, 24, + 0, 0), + GATE(CLK_ISP_I2C0_ISP, "i2c0_isp", "aclk200", E4X12_GATE_ISP0, 25, + 0, 0), + GATE(CLK_ISP_I2C1_ISP, "i2c1_isp", "aclk200", E4X12_GATE_ISP0, 26, + 0, 0), + GATE(CLK_ISP_MTCADC_ISP, "mtcadc_isp", "aclk200", E4X12_GATE_ISP0, 27, + 0, 0), + GATE(CLK_ISP_PWM_ISP, "pwm_isp", "aclk200", E4X12_GATE_ISP0, 28, 0, 0), + GATE(CLK_ISP_WDT_ISP, "wdt_isp", "aclk200", E4X12_GATE_ISP0, 30, 0, 0), + GATE(CLK_ISP_UART_ISP, "uart_isp", "aclk200", E4X12_GATE_ISP0, 31, + 0, 0), + GATE(CLK_ISP_ASYNCAXIM, "asyncaxim", "aclk200", E4X12_GATE_ISP1, 0, + 0, 0), + GATE(CLK_ISP_SMMU_ISPCX, "smmu_ispcx", "aclk200", E4X12_GATE_ISP1, 4, + 0, 0), + GATE(CLK_ISP_SPI0_ISP, "spi0_isp", "aclk200", E4X12_GATE_ISP1, 12, + 0, 0), + GATE(CLK_ISP_SPI1_ISP, "spi1_isp", "aclk200", E4X12_GATE_ISP1, 13, + 0, 0), +}; + +static int __maybe_unused exynos4x12_isp_clk_suspend(struct device *dev) +{ + struct samsung_clk_provider *ctx = dev_get_drvdata(dev); + + samsung_clk_save(ctx->reg_base, exynos4x12_save_isp, + ARRAY_SIZE(exynos4x12_clk_isp_save)); + return 0; +} + +static int __maybe_unused exynos4x12_isp_clk_resume(struct device *dev) +{ + struct samsung_clk_provider *ctx = dev_get_drvdata(dev); + + samsung_clk_restore(ctx->reg_base, exynos4x12_save_isp, + ARRAY_SIZE(exynos4x12_clk_isp_save)); + return 0; +} + +static int __init exynos4x12_isp_clk_probe(struct platform_device *pdev) +{ + struct samsung_clk_provider *ctx; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct resource *res; + void __iomem *reg_base; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + reg_base = devm_ioremap_resource(dev, res); + if (IS_ERR(reg_base)) { + dev_err(dev, "failed to map registers\n"); + return PTR_ERR(reg_base); + } + + exynos4x12_save_isp = samsung_clk_alloc_reg_dump(exynos4x12_clk_isp_save, + ARRAY_SIZE(exynos4x12_clk_isp_save)); + if (!exynos4x12_save_isp) + return -ENOMEM; + + ctx = samsung_clk_init(np, reg_base, CLK_NR_ISP_CLKS); + ctx->dev = dev; + + platform_set_drvdata(pdev, ctx); + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + + samsung_clk_register_div(ctx, exynos4x12_isp_div_clks, + ARRAY_SIZE(exynos4x12_isp_div_clks)); + samsung_clk_register_gate(ctx, exynos4x12_isp_gate_clks, + ARRAY_SIZE(exynos4x12_isp_gate_clks)); + + samsung_clk_of_add_provider(np, ctx); + pm_runtime_put(dev); + + return 0; +} + +static const struct of_device_id exynos4x12_isp_clk_of_match[] = { + { .compatible = "samsung,exynos4412-isp-clock", }, + { }, +}; + +static const struct dev_pm_ops exynos4x12_isp_pm_ops = { + SET_RUNTIME_PM_OPS(exynos4x12_isp_clk_suspend, + exynos4x12_isp_clk_resume, NULL) + SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + +static struct platform_driver exynos4x12_isp_clk_driver __refdata = { + .driver = { + .name = "exynos4x12-isp-clk", + .of_match_table = exynos4x12_isp_clk_of_match, + .suppress_bind_attrs = true, + .pm = &exynos4x12_isp_pm_ops, + }, + .probe = exynos4x12_isp_clk_probe, +}; + +static int __init exynos4x12_isp_clk_init(void) +{ + return platform_driver_register(&exynos4x12_isp_clk_driver); +} +core_initcall(exynos4x12_isp_clk_init); diff --git a/include/dt-bindings/clock/exynos4.h b/include/dt-bindings/clock/exynos4.h index c40111f36d5e..bf44a7c5eccc 100644 --- a/include/dt-bindings/clock/exynos4.h +++ b/include/dt-bindings/clock/exynos4.h @@ -272,4 +272,39 @@ /* must be greater than maximal clock id */ #define CLK_NR_CLKS 461 +/* Exynos4x12 ISP clocks */ +#define CLK_ISP_FIMC_ISP 1 +#define CLK_ISP_FIMC_DRC 2 +#define CLK_ISP_FIMC_FD 3 +#define CLK_ISP_FIMC_LITE0 4 +#define CLK_ISP_FIMC_LITE1 5 +#define CLK_ISP_MCUISP 6 +#define CLK_ISP_GICISP 7 +#define CLK_ISP_SMMU_ISP 8 +#define CLK_ISP_SMMU_DRC 9 +#define CLK_ISP_SMMU_FD 10 +#define CLK_ISP_SMMU_LITE0 11 +#define CLK_ISP_SMMU_LITE1 12 +#define CLK_ISP_PPMUISPMX 13 +#define CLK_ISP_PPMUISPX 14 +#define CLK_ISP_MCUCTL_ISP 15 +#define CLK_ISP_MPWM_ISP 16 +#define CLK_ISP_I2C0_ISP 17 +#define CLK_ISP_I2C1_ISP 18 +#define CLK_ISP_MTCADC_ISP 19 +#define CLK_ISP_PWM_ISP 20 +#define CLK_ISP_WDT_ISP 21 +#define CLK_ISP_UART_ISP 22 +#define CLK_ISP_ASYNCAXIM 23 +#define CLK_ISP_SMMU_ISPCX 24 +#define CLK_ISP_SPI0_ISP 25 +#define CLK_ISP_SPI1_ISP 26 + +#define CLK_ISP_DIV_ISP0 30 +#define CLK_ISP_DIV_ISP1 31 +#define CLK_ISP_DIV_MCUISP0 32 +#define CLK_ISP_DIV_MCUISP1 33 + +#define CLK_NR_ISP_CLKS 34 + #endif /* _DT_BINDINGS_CLOCK_EXYNOS_4_H */