pwm: remove pwm-puv3 driver (a2022e1c) · Commits · 戴 / test

drivers/pwm/Kconfig

+0 −9

Original line number	Diff line number	Diff line
		@@ -370,15 +370,6 @@ config PWM_PCA9685
		To compile this driver as a module, choose M here: the module
		will be called pwm-pca9685.

		config PWM_PUV3
		tristate "PKUnity NetBook-0916 PWM support"
		depends on ARCH_PUV3
		help
		Generic PWM framework driver for PKUnity NetBook-0916.

		To compile this driver as a module, choose M here: the module
		will be called pwm-puv3.

		config PWM_PXA
		tristate "PXA PWM support"
		depends on ARCH_PXA \|\| COMPILE_TEST

drivers/pwm/Makefile

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Original line number	Diff line number	Diff line
		@@ -34,7 +34,6 @@ obj-$(CONFIG_PWM_MTK_DISP) += pwm-mtk-disp.o
		obj-$(CONFIG_PWM_MXS) += pwm-mxs.o
		obj-$(CONFIG_PWM_OMAP_DMTIMER) += pwm-omap-dmtimer.o
		obj-$(CONFIG_PWM_PCA9685) += pwm-pca9685.o
		obj-$(CONFIG_PWM_PUV3) += pwm-puv3.o
		obj-$(CONFIG_PWM_PXA) += pwm-pxa.o
		obj-$(CONFIG_PWM_RCAR) += pwm-rcar.o
		obj-$(CONFIG_PWM_RENESAS_TPU) += pwm-renesas-tpu.o

drivers/pwm/pwm-puv3.c

deleted100644 → 0

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Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* linux/arch/unicore32/kernel/pwm.c
		*
		* Code specific to PKUnity SoC and UniCore ISA
		*
		* Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
		* Copyright (C) 2001-2010 Guan Xuetao
		*/

		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/platform_device.h>
		#include <linux/slab.h>
		#include <linux/err.h>
		#include <linux/clk.h>
		#include <linux/io.h>
		#include <linux/pwm.h>

		#include <asm/div64.h>
		#include <mach/hardware.h>

		struct puv3_pwm_chip {
		struct pwm_chip chip;
		void __iomem *base;
		struct clk *clk;
		};

		static inline struct puv3_pwm_chip to_puv3(struct pwm_chip chip)
		{
		return container_of(chip, struct puv3_pwm_chip, chip);
		}

		/*
		* period_ns = 10^9 * (PRESCALE + 1) * (PV + 1) / PWM_CLK_RATE
		* duty_ns = 10^9 * (PRESCALE + 1) * DC / PWM_CLK_RATE
		*/
		static int puv3_pwm_config(struct pwm_chip chip, struct pwm_device pwm,
		int duty_ns, int period_ns)
		{
		unsigned long period_cycles, prescale, pv, dc;
		struct puv3_pwm_chip *puv3 = to_puv3(chip);
		unsigned long long c;

		c = clk_get_rate(puv3->clk);
		c = c * period_ns;
		do_div(c, 1000000000);
		period_cycles = c;

		if (period_cycles < 1)
		period_cycles = 1;

		prescale = (period_cycles - 1) / 1024;
		pv = period_cycles / (prescale + 1) - 1;

		if (prescale > 63)
		return -EINVAL;

		if (duty_ns == period_ns)
		dc = OST_PWMDCCR_FDCYCLE;
		else
		dc = (pv + 1) * duty_ns / period_ns;

		/*
		* NOTE: the clock to PWM has to be enabled first
		* before writing to the registers
		*/
		clk_prepare_enable(puv3->clk);

		writel(prescale, puv3->base + OST_PWM_PWCR);
		writel(pv - dc, puv3->base + OST_PWM_DCCR);
		writel(pv, puv3->base + OST_PWM_PCR);

		clk_disable_unprepare(puv3->clk);

		return 0;
		}

		static int puv3_pwm_enable(struct pwm_chip chip, struct pwm_device pwm)
		{
		struct puv3_pwm_chip *puv3 = to_puv3(chip);

		return clk_prepare_enable(puv3->clk);
		}

		static void puv3_pwm_disable(struct pwm_chip chip, struct pwm_device pwm)
		{
		struct puv3_pwm_chip *puv3 = to_puv3(chip);

		clk_disable_unprepare(puv3->clk);
		}

		static const struct pwm_ops puv3_pwm_ops = {
		.config = puv3_pwm_config,
		.enable = puv3_pwm_enable,
		.disable = puv3_pwm_disable,
		.owner = THIS_MODULE,
		};

		static int pwm_probe(struct platform_device *pdev)
		{
		struct puv3_pwm_chip *puv3;
		struct resource *r;
		int ret;

		puv3 = devm_kzalloc(&pdev->dev, sizeof(*puv3), GFP_KERNEL);
		if (!puv3)
		return -ENOMEM;

		puv3->clk = devm_clk_get(&pdev->dev, "OST_CLK");
		if (IS_ERR(puv3->clk))
		return PTR_ERR(puv3->clk);

		r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		puv3->base = devm_ioremap_resource(&pdev->dev, r);
		if (IS_ERR(puv3->base))
		return PTR_ERR(puv3->base);

		puv3->chip.dev = &pdev->dev;
		puv3->chip.ops = &puv3_pwm_ops;
		puv3->chip.base = -1;
		puv3->chip.npwm = 1;

		ret = pwmchip_add(&puv3->chip);
		if (ret < 0) {
		dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
		return ret;
		}

		platform_set_drvdata(pdev, puv3);
		return 0;
		}

		static int pwm_remove(struct platform_device *pdev)
		{
		struct puv3_pwm_chip *puv3 = platform_get_drvdata(pdev);

		return pwmchip_remove(&puv3->chip);
		}

		static struct platform_driver puv3_pwm_driver = {
		.driver = {
		.name = "PKUnity-v3-PWM",
		},
		.probe = pwm_probe,
		.remove = pwm_remove,
		};
		module_platform_driver(puv3_pwm_driver);

		MODULE_LICENSE("GPL v2");

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