pwm: remove pwm-puv3 driver

The unicore32 port is removed from the kernel.
There is no point to keep stale PWM driver for this architecture.
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Guenter Roeck <linux@roeck-us.net>

drivers/pwm/Kconfig

@@ -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

@@ -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

-// 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");