Re: [PATCH 11/16] Input: remove w90x900 touchscreen driver

From: Dmitry Torokhov
Date: Fri Aug 09 2019 - 17:56:45 EST

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Previous message: Dmitry Torokhov: "Re: [PATCH 10/16] Input: remove w90x900 keyboard driver"
In reply to: Arnd Bergmann: "[PATCH 11/16] Input: remove w90x900 touchscreen driver"
Next in thread: Arnd Bergmann: "[PATCH 16/16] ARM: remove w90x900 platform"
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On Fri, Aug 09, 2019 at 10:27:39PM +0200, Arnd Bergmann wrote:
> The ARM w90x900 platform is getting removed, so this driver is obsolete.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Applied, thank you.

> ---
> drivers/input/touchscreen/Kconfig | 9 -
> drivers/input/touchscreen/Makefile | 1 -
> drivers/input/touchscreen/w90p910_ts.c | 331 -------------------------
> 3 files changed, 341 deletions(-)
> delete mode 100644 drivers/input/touchscreen/w90p910_ts.c
>
> diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
> index fb91f2d4049e..46ad9090493b 100644
> --- a/drivers/input/touchscreen/Kconfig
> +++ b/drivers/input/touchscreen/Kconfig
> @@ -1112,15 +1112,6 @@ config TOUCHSCREEN_TSC2007_IIO
> or ambient light monitoring), temperature and raw input
> values.
>
> -config TOUCHSCREEN_W90X900
> - tristate "W90P910 touchscreen driver"
> - depends on ARCH_W90X900
> - help
> - Say Y here if you have a W90P910 based touchscreen.
> -
> - To compile this driver as a module, choose M here: the
> - module will be called w90p910_ts.
> -
> config TOUCHSCREEN_PCAP
> tristate "Motorola PCAP touchscreen"
> depends on EZX_PCAP
> diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
> index 084a596a0c8b..94c6162409b3 100644
> --- a/drivers/input/touchscreen/Makefile
> +++ b/drivers/input/touchscreen/Makefile
> @@ -102,7 +102,6 @@ wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9712) += wm9712.o
> wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9713) += wm9713.o
> obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE) += mainstone-wm97xx.o
> obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE) += zylonite-wm97xx.o
> -obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o
> obj-$(CONFIG_TOUCHSCREEN_SX8654) += sx8654.o
> obj-$(CONFIG_TOUCHSCREEN_TPS6507X) += tps6507x-ts.o
> obj-$(CONFIG_TOUCHSCREEN_ZET6223) += zet6223.o
> diff --git a/drivers/input/touchscreen/w90p910_ts.c b/drivers/input/touchscreen/w90p910_ts.c
> deleted file mode 100644
> index 7893d7fa398c..000000000000
> --- a/drivers/input/touchscreen/w90p910_ts.c
> +++ /dev/null
> @@ -1,331 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-only
> -/*
> - * Copyright (c) 2008 Nuvoton technology corporation.
> - *
> - * Wan ZongShun <mcuos.com@xxxxxxxxx>
> - */
> -
> -#include <linux/delay.h>
> -#include <linux/module.h>
> -#include <linux/platform_device.h>
> -#include <linux/io.h>
> -#include <linux/clk.h>
> -#include <linux/input.h>
> -#include <linux/interrupt.h>
> -#include <linux/slab.h>
> -
> -/* ADC controller bit defines */
> -#define ADC_DELAY 0xf00
> -#define ADC_DOWN 0x01
> -#define ADC_TSC_Y (0x01 << 8)
> -#define ADC_TSC_X (0x00 << 8)
> -#define TSC_FOURWIRE (~(0x03 << 1))
> -#define ADC_CLK_EN (0x01 << 28) /* ADC clock enable */
> -#define ADC_READ_CON (0x01 << 12)
> -#define ADC_CONV (0x01 << 13)
> -#define ADC_SEMIAUTO (0x01 << 14)
> -#define ADC_WAITTRIG (0x03 << 14)
> -#define ADC_RST1 (0x01 << 16)
> -#define ADC_RST0 (0x00 << 16)
> -#define ADC_EN (0x01 << 17)
> -#define ADC_INT (0x01 << 18)
> -#define WT_INT (0x01 << 20)
> -#define ADC_INT_EN (0x01 << 21)
> -#define LVD_INT_EN (0x01 << 22)
> -#define WT_INT_EN (0x01 << 23)
> -#define ADC_DIV (0x04 << 1) /* div = 6 */
> -
> -enum ts_state {
> - TS_WAIT_NEW_PACKET, /* We are waiting next touch report */
> - TS_WAIT_X_COORD, /* We are waiting for ADC to report X coord */
> - TS_WAIT_Y_COORD, /* We are waiting for ADC to report Y coord */
> - TS_IDLE, /* Input device is closed, don't do anything */
> -};
> -
> -struct w90p910_ts {
> - struct input_dev *input;
> - struct timer_list timer;
> - struct clk *clk;
> - int irq_num;
> - void __iomem *ts_reg;
> - spinlock_t lock;
> - enum ts_state state;
> -};
> -
> -static void w90p910_report_event(struct w90p910_ts *w90p910_ts, bool down)
> -{
> - struct input_dev *dev = w90p910_ts->input;
> -
> - if (down) {
> - input_report_abs(dev, ABS_X,
> - __raw_readl(w90p910_ts->ts_reg + 0x0c));
> - input_report_abs(dev, ABS_Y,
> - __raw_readl(w90p910_ts->ts_reg + 0x10));
> - }
> -
> - input_report_key(dev, BTN_TOUCH, down);
> - input_sync(dev);
> -}
> -
> -static void w90p910_prepare_x_reading(struct w90p910_ts *w90p910_ts)
> -{
> - unsigned long ctlreg;
> -
> - __raw_writel(ADC_TSC_X, w90p910_ts->ts_reg + 0x04);
> - ctlreg = __raw_readl(w90p910_ts->ts_reg);
> - ctlreg &= ~(ADC_WAITTRIG | WT_INT | WT_INT_EN);
> - ctlreg |= ADC_SEMIAUTO | ADC_INT_EN | ADC_CONV;
> - __raw_writel(ctlreg, w90p910_ts->ts_reg);
> -
> - w90p910_ts->state = TS_WAIT_X_COORD;
> -}
> -
> -static void w90p910_prepare_y_reading(struct w90p910_ts *w90p910_ts)
> -{
> - unsigned long ctlreg;
> -
> - __raw_writel(ADC_TSC_Y, w90p910_ts->ts_reg + 0x04);
> - ctlreg = __raw_readl(w90p910_ts->ts_reg);
> - ctlreg &= ~(ADC_WAITTRIG | ADC_INT | WT_INT_EN);
> - ctlreg |= ADC_SEMIAUTO | ADC_INT_EN | ADC_CONV;
> - __raw_writel(ctlreg, w90p910_ts->ts_reg);
> -
> - w90p910_ts->state = TS_WAIT_Y_COORD;
> -}
> -
> -static void w90p910_prepare_next_packet(struct w90p910_ts *w90p910_ts)
> -{
> - unsigned long ctlreg;
> -
> - ctlreg = __raw_readl(w90p910_ts->ts_reg);
> - ctlreg &= ~(ADC_INT | ADC_INT_EN | ADC_SEMIAUTO | ADC_CONV);
> - ctlreg |= ADC_WAITTRIG | WT_INT_EN;
> - __raw_writel(ctlreg, w90p910_ts->ts_reg);
> -
> - w90p910_ts->state = TS_WAIT_NEW_PACKET;
> -}
> -
> -static irqreturn_t w90p910_ts_interrupt(int irq, void *dev_id)
> -{
> - struct w90p910_ts *w90p910_ts = dev_id;
> - unsigned long flags;
> -
> - spin_lock_irqsave(&w90p910_ts->lock, flags);
> -
> - switch (w90p910_ts->state) {
> - case TS_WAIT_NEW_PACKET:
> - /*
> - * The controller only generates interrupts when pen
> - * is down.
> - */
> - del_timer(&w90p910_ts->timer);
> - w90p910_prepare_x_reading(w90p910_ts);
> - break;
> -
> -
> - case TS_WAIT_X_COORD:
> - w90p910_prepare_y_reading(w90p910_ts);
> - break;
> -
> - case TS_WAIT_Y_COORD:
> - w90p910_report_event(w90p910_ts, true);
> - w90p910_prepare_next_packet(w90p910_ts);
> - mod_timer(&w90p910_ts->timer, jiffies + msecs_to_jiffies(100));
> - break;
> -
> - case TS_IDLE:
> - break;
> - }
> -
> - spin_unlock_irqrestore(&w90p910_ts->lock, flags);
> -
> - return IRQ_HANDLED;
> -}
> -
> -static void w90p910_check_pen_up(struct timer_list *t)
> -{
> - struct w90p910_ts *w90p910_ts = from_timer(w90p910_ts, t, timer);
> - unsigned long flags;
> -
> - spin_lock_irqsave(&w90p910_ts->lock, flags);
> -
> - if (w90p910_ts->state == TS_WAIT_NEW_PACKET &&
> - !(__raw_readl(w90p910_ts->ts_reg + 0x04) & ADC_DOWN)) {
> -
> - w90p910_report_event(w90p910_ts, false);
> - }
> -
> - spin_unlock_irqrestore(&w90p910_ts->lock, flags);
> -}
> -
> -static int w90p910_open(struct input_dev *dev)
> -{
> - struct w90p910_ts *w90p910_ts = input_get_drvdata(dev);
> - unsigned long val;
> -
> - /* enable the ADC clock */
> - clk_enable(w90p910_ts->clk);
> -
> - __raw_writel(ADC_RST1, w90p910_ts->ts_reg);
> - msleep(1);
> - __raw_writel(ADC_RST0, w90p910_ts->ts_reg);
> - msleep(1);
> -
> - /* set delay and screen type */
> - val = __raw_readl(w90p910_ts->ts_reg + 0x04);
> - __raw_writel(val & TSC_FOURWIRE, w90p910_ts->ts_reg + 0x04);
> - __raw_writel(ADC_DELAY, w90p910_ts->ts_reg + 0x08);
> -
> - w90p910_ts->state = TS_WAIT_NEW_PACKET;
> - wmb();
> -
> - /* set trigger mode */
> - val = __raw_readl(w90p910_ts->ts_reg);
> - val |= ADC_WAITTRIG | ADC_DIV | ADC_EN | WT_INT_EN;
> - __raw_writel(val, w90p910_ts->ts_reg);
> -
> - return 0;
> -}
> -
> -static void w90p910_close(struct input_dev *dev)
> -{
> - struct w90p910_ts *w90p910_ts = input_get_drvdata(dev);
> - unsigned long val;
> -
> - /* disable trigger mode */
> -
> - spin_lock_irq(&w90p910_ts->lock);
> -
> - w90p910_ts->state = TS_IDLE;
> -
> - val = __raw_readl(w90p910_ts->ts_reg);
> - val &= ~(ADC_WAITTRIG | ADC_DIV | ADC_EN | WT_INT_EN | ADC_INT_EN);
> - __raw_writel(val, w90p910_ts->ts_reg);
> -
> - spin_unlock_irq(&w90p910_ts->lock);
> -
> - /* Now that interrupts are shut off we can safely delete timer */
> - del_timer_sync(&w90p910_ts->timer);
> -
> - /* stop the ADC clock */
> - clk_disable(w90p910_ts->clk);
> -}
> -
> -static int w90x900ts_probe(struct platform_device *pdev)
> -{
> - struct w90p910_ts *w90p910_ts;
> - struct input_dev *input_dev;
> - struct resource *res;
> - int err;
> -
> - w90p910_ts = kzalloc(sizeof(struct w90p910_ts), GFP_KERNEL);
> - input_dev = input_allocate_device();
> - if (!w90p910_ts || !input_dev) {
> - err = -ENOMEM;
> - goto fail1;
> - }
> -
> - w90p910_ts->input = input_dev;
> - w90p910_ts->state = TS_IDLE;
> - spin_lock_init(&w90p910_ts->lock);
> - timer_setup(&w90p910_ts->timer, w90p910_check_pen_up, 0);
> -
> - res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - if (!res) {
> - err = -ENXIO;
> - goto fail1;
> - }
> -
> - if (!request_mem_region(res->start, resource_size(res),
> - pdev->name)) {
> - err = -EBUSY;
> - goto fail1;
> - }
> -
> - w90p910_ts->ts_reg = ioremap(res->start, resource_size(res));
> - if (!w90p910_ts->ts_reg) {
> - err = -ENOMEM;
> - goto fail2;
> - }
> -
> - w90p910_ts->clk = clk_get(&pdev->dev, NULL);
> - if (IS_ERR(w90p910_ts->clk)) {
> - err = PTR_ERR(w90p910_ts->clk);
> - goto fail3;
> - }
> -
> - input_dev->name = "W90P910 TouchScreen";
> - input_dev->phys = "w90p910ts/event0";
> - input_dev->id.bustype = BUS_HOST;
> - input_dev->id.vendor = 0x0005;
> - input_dev->id.product = 0x0001;
> - input_dev->id.version = 0x0100;
> - input_dev->dev.parent = &pdev->dev;
> - input_dev->open = w90p910_open;
> - input_dev->close = w90p910_close;
> -
> - input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
> - input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
> -
> - input_set_abs_params(input_dev, ABS_X, 0, 0x400, 0, 0);
> - input_set_abs_params(input_dev, ABS_Y, 0, 0x400, 0, 0);
> -
> - input_set_drvdata(input_dev, w90p910_ts);
> -
> - w90p910_ts->irq_num = platform_get_irq(pdev, 0);
> - if (request_irq(w90p910_ts->irq_num, w90p910_ts_interrupt,
> - 0, "w90p910ts", w90p910_ts)) {
> - err = -EBUSY;
> - goto fail4;
> - }
> -
> - err = input_register_device(w90p910_ts->input);
> - if (err)
> - goto fail5;
> -
> - platform_set_drvdata(pdev, w90p910_ts);
> -
> - return 0;
> -
> -fail5: free_irq(w90p910_ts->irq_num, w90p910_ts);
> -fail4: clk_put(w90p910_ts->clk);
> -fail3: iounmap(w90p910_ts->ts_reg);
> -fail2: release_mem_region(res->start, resource_size(res));
> -fail1: input_free_device(input_dev);
> - kfree(w90p910_ts);
> - return err;
> -}
> -
> -static int w90x900ts_remove(struct platform_device *pdev)
> -{
> - struct w90p910_ts *w90p910_ts = platform_get_drvdata(pdev);
> - struct resource *res;
> -
> - free_irq(w90p910_ts->irq_num, w90p910_ts);
> - del_timer_sync(&w90p910_ts->timer);
> - iounmap(w90p910_ts->ts_reg);
> -
> - clk_put(w90p910_ts->clk);
> -
> - res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - release_mem_region(res->start, resource_size(res));
> -
> - input_unregister_device(w90p910_ts->input);
> - kfree(w90p910_ts);
> -
> - return 0;
> -}
> -
> -static struct platform_driver w90x900ts_driver = {
> - .probe = w90x900ts_probe,
> - .remove = w90x900ts_remove,
> - .driver = {
> - .name = "nuc900-ts",
> - },
> -};
> -module_platform_driver(w90x900ts_driver);
> -
> -MODULE_AUTHOR("Wan ZongShun <mcuos.com@xxxxxxxxx>");
> -MODULE_DESCRIPTION("w90p910 touch screen driver!");
> -MODULE_LICENSE("GPL");
> -MODULE_ALIAS("platform:nuc900-ts");
> --
> 2.20.0
>

--
Dmitry

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