Re: [PATCH 14/15] Input: atmel_tsadcc: remove driver

From: Jonathan Cameron
Date: Sun Mar 16 2014 - 14:26:03 EST

On 05/03/14 18:46, Dmitry Torokhov wrote:
On Wed, Mar 05, 2014 at 06:35:39PM +0100, Alexandre Belloni wrote:
The atmel_tsadcc driver is not used anymore, it has been replaced by at91_adc so
remove it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>

Acked-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
All the rest of this series looks fine to me.

Dmitry, are you happy for me to take this whole series through IIO once
the last few bits are pinned down? If the atmel guys want to take the whole
thing through their tree I'm also happy with that.

Not sure what the lowest pain route will be...

---
MAINTAINERS | 6 -
drivers/input/touchscreen/Kconfig | 12 --
drivers/input/touchscreen/Makefile | 1 -
drivers/input/touchscreen/atmel_tsadcc.c | 358 -------------------------------
4 files changed, 377 deletions(-)
delete mode 100644 drivers/input/touchscreen/atmel_tsadcc.c

diff --git a/MAINTAINERS b/MAINTAINERS
index c6d0e93eff62..134dd63dfa17 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1591,12 +1591,6 @@ S: Supported
F: drivers/misc/atmel_tclib.c
F: drivers/clocksource/tcb_clksrc.c

-ATMEL TSADCC DRIVER
-M: Josh Wu <josh.wu@xxxxxxxxx>
-L: linux-input@xxxxxxxxxxxxxxx
-S: Supported
-F: drivers/input/touchscreen/atmel_tsadcc.c
-
ATMEL USBA UDC DRIVER
M: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
L: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx (moderated for non-subscribers)
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 07e9e82029d1..4090f69e78af 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -559,18 +559,6 @@ config TOUCHSCREEN_TI_AM335X_TSC
To compile this driver as a module, choose M here: the
module will be called ti_am335x_tsc.

-config TOUCHSCREEN_ATMEL_TSADCC
- tristate "Atmel Touchscreen Interface"
- depends on ARCH_AT91
- help
- Say Y here if you have a 4-wire touchscreen connected to the
- ADC Controller on your Atmel SoC.
-
- If unsure, say N.
-
- To compile this driver as a module, choose M here: the
- module will be called atmel_tsadcc.
-
config TOUCHSCREEN_UCB1400
tristate "Philips UCB1400 touchscreen"
depends on AC97_BUS
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 62801f213346..f326a8290593 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -13,7 +13,6 @@ obj-$(CONFIG_TOUCHSCREEN_AD7879_I2C) += ad7879-i2c.o
obj-$(CONFIG_TOUCHSCREEN_AD7879_SPI) += ad7879-spi.o
obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o
obj-$(CONFIG_TOUCHSCREEN_ATMEL_MXT) += atmel_mxt_ts.o
-obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o
obj-$(CONFIG_TOUCHSCREEN_AUO_PIXCIR) += auo-pixcir-ts.o
obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o
obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o
diff --git a/drivers/input/touchscreen/atmel_tsadcc.c b/drivers/input/touchscreen/atmel_tsadcc.c
deleted file mode 100644
index a7c9d6967d1e..000000000000
--- a/drivers/input/touchscreen/atmel_tsadcc.c
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- * Atmel Touch Screen Driver
- *
- * Copyright (c) 2008 ATMEL
- * Copyright (c) 2008 Dan Liang
- * Copyright (c) 2008 TimeSys Corporation
- * Copyright (c) 2008 Justin Waters
- *
- * Based on touchscreen code from Atmel Corporation.
- *
- * 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.
- */
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/input.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/platform_data/atmel.h>
-#include <mach/cpu.h>
-
-/* Register definitions based on AT91SAM9RL64 preliminary draft datasheet */
-
-#define ATMEL_TSADCC_CR 0x00 /* Control register */
-#define ATMEL_TSADCC_SWRST (1 << 0) /* Software Reset*/
-#define ATMEL_TSADCC_START (1 << 1) /* Start conversion */
-
-#define ATMEL_TSADCC_MR 0x04 /* Mode register */
-#define ATMEL_TSADCC_TSAMOD (3 << 0) /* ADC mode */
-#define ATMEL_TSADCC_TSAMOD_ADC_ONLY_MODE (0x0) /* ADC Mode */
-#define ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE (0x1) /* Touch Screen Only Mode */
-#define ATMEL_TSADCC_LOWRES (1 << 4) /* Resolution selection */
-#define ATMEL_TSADCC_SLEEP (1 << 5) /* Sleep mode */
-#define ATMEL_TSADCC_PENDET (1 << 6) /* Pen Detect selection */
-#define ATMEL_TSADCC_PRES (1 << 7) /* Pressure Measurement Selection */
-#define ATMEL_TSADCC_PRESCAL (0x3f << 8) /* Prescalar Rate Selection */
-#define ATMEL_TSADCC_EPRESCAL (0xff << 8) /* Prescalar Rate Selection (Extended) */
-#define ATMEL_TSADCC_STARTUP (0x7f << 16) /* Start Up time */
-#define ATMEL_TSADCC_SHTIM (0xf << 24) /* Sample & Hold time */
-#define ATMEL_TSADCC_PENDBC (0xf << 28) /* Pen Detect debouncing time */
-
-#define ATMEL_TSADCC_TRGR 0x08 /* Trigger register */
-#define ATMEL_TSADCC_TRGMOD (7 << 0) /* Trigger mode */
-#define ATMEL_TSADCC_TRGMOD_NONE (0 << 0)
-#define ATMEL_TSADCC_TRGMOD_EXT_RISING (1 << 0)
-#define ATMEL_TSADCC_TRGMOD_EXT_FALLING (2 << 0)
-#define ATMEL_TSADCC_TRGMOD_EXT_ANY (3 << 0)
-#define ATMEL_TSADCC_TRGMOD_PENDET (4 << 0)
-#define ATMEL_TSADCC_TRGMOD_PERIOD (5 << 0)
-#define ATMEL_TSADCC_TRGMOD_CONTINUOUS (6 << 0)
-#define ATMEL_TSADCC_TRGPER (0xffff << 16) /* Trigger period */
-
-#define ATMEL_TSADCC_TSR 0x0C /* Touch Screen register */
-#define ATMEL_TSADCC_TSFREQ (0xf << 0) /* TS Frequency in Interleaved mode */
-#define ATMEL_TSADCC_TSSHTIM (0xf << 24) /* Sample & Hold time */
-
-#define ATMEL_TSADCC_CHER 0x10 /* Channel Enable register */
-#define ATMEL_TSADCC_CHDR 0x14 /* Channel Disable register */
-#define ATMEL_TSADCC_CHSR 0x18 /* Channel Status register */
-#define ATMEL_TSADCC_CH(n) (1 << (n)) /* Channel number */
-
-#define ATMEL_TSADCC_SR 0x1C /* Status register */
-#define ATMEL_TSADCC_EOC(n) (1 << ((n)+0)) /* End of conversion for channel N */
-#define ATMEL_TSADCC_OVRE(n) (1 << ((n)+8)) /* Overrun error for channel N */
-#define ATMEL_TSADCC_DRDY (1 << 16) /* Data Ready */
-#define ATMEL_TSADCC_GOVRE (1 << 17) /* General Overrun Error */
-#define ATMEL_TSADCC_ENDRX (1 << 18) /* End of RX Buffer */
-#define ATMEL_TSADCC_RXBUFF (1 << 19) /* TX Buffer full */
-#define ATMEL_TSADCC_PENCNT (1 << 20) /* Pen contact */
-#define ATMEL_TSADCC_NOCNT (1 << 21) /* No contact */
-
-#define ATMEL_TSADCC_LCDR 0x20 /* Last Converted Data register */
-#define ATMEL_TSADCC_DATA (0x3ff << 0) /* Channel data */
-
-#define ATMEL_TSADCC_IER 0x24 /* Interrupt Enable register */
-#define ATMEL_TSADCC_IDR 0x28 /* Interrupt Disable register */
-#define ATMEL_TSADCC_IMR 0x2C /* Interrupt Mask register */
-#define ATMEL_TSADCC_CDR0 0x30 /* Channel Data 0 */
-#define ATMEL_TSADCC_CDR1 0x34 /* Channel Data 1 */
-#define ATMEL_TSADCC_CDR2 0x38 /* Channel Data 2 */
-#define ATMEL_TSADCC_CDR3 0x3C /* Channel Data 3 */
-#define ATMEL_TSADCC_CDR4 0x40 /* Channel Data 4 */
-#define ATMEL_TSADCC_CDR5 0x44 /* Channel Data 5 */
-
-#define ATMEL_TSADCC_XPOS 0x50
-#define ATMEL_TSADCC_Z1DAT 0x54
-#define ATMEL_TSADCC_Z2DAT 0x58
-
-#define PRESCALER_VAL(x) ((x) >> 8)
-
-#define ADC_DEFAULT_CLOCK 100000
-
-struct atmel_tsadcc {
- struct input_dev *input;
- char phys[32];
- struct clk *clk;
- int irq;
- unsigned int prev_absx;
- unsigned int prev_absy;
- unsigned char bufferedmeasure;
-};
-
-static void __iomem *tsc_base;
-
-#define atmel_tsadcc_read(reg) __raw_readl(tsc_base + (reg))
-#define atmel_tsadcc_write(reg, val) __raw_writel((val), tsc_base + (reg))
-
-static irqreturn_t atmel_tsadcc_interrupt(int irq, void *dev)
-{
- struct atmel_tsadcc *ts_dev = (struct atmel_tsadcc *)dev;
- struct input_dev *input_dev = ts_dev->input;
-
- unsigned int status;
- unsigned int reg;
-
- status = atmel_tsadcc_read(ATMEL_TSADCC_SR);
- status &= atmel_tsadcc_read(ATMEL_TSADCC_IMR);
-
- if (status & ATMEL_TSADCC_NOCNT) {
- /* Contact lost */
- reg = atmel_tsadcc_read(ATMEL_TSADCC_MR) | ATMEL_TSADCC_PENDBC;
-
- atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
- atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);
- atmel_tsadcc_write(ATMEL_TSADCC_IDR,
- ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);
- atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);
-
- input_report_key(input_dev, BTN_TOUCH, 0);
- ts_dev->bufferedmeasure = 0;
- input_sync(input_dev);
-
- } else if (status & ATMEL_TSADCC_PENCNT) {
- /* Pen detected */
- reg = atmel_tsadcc_read(ATMEL_TSADCC_MR);
- reg &= ~ATMEL_TSADCC_PENDBC;
-
- atmel_tsadcc_write(ATMEL_TSADCC_IDR, ATMEL_TSADCC_PENCNT);
- atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
- atmel_tsadcc_write(ATMEL_TSADCC_IER,
- ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);
- atmel_tsadcc_write(ATMEL_TSADCC_TRGR,
- ATMEL_TSADCC_TRGMOD_PERIOD | (0x0FFF << 16));
-
- } else if (status & ATMEL_TSADCC_EOC(3)) {
- /* Conversion finished */
-
- if (ts_dev->bufferedmeasure) {
- /* Last measurement is always discarded, since it can
- * be erroneous.
- * Always report previous measurement */
- input_report_abs(input_dev, ABS_X, ts_dev->prev_absx);
- input_report_abs(input_dev, ABS_Y, ts_dev->prev_absy);
- input_report_key(input_dev, BTN_TOUCH, 1);
- input_sync(input_dev);
- } else
- ts_dev->bufferedmeasure = 1;
-
- /* Now make new measurement */
- ts_dev->prev_absx = atmel_tsadcc_read(ATMEL_TSADCC_CDR3) << 10;
- ts_dev->prev_absx /= atmel_tsadcc_read(ATMEL_TSADCC_CDR2);
-
- ts_dev->prev_absy = atmel_tsadcc_read(ATMEL_TSADCC_CDR1) << 10;
- ts_dev->prev_absy /= atmel_tsadcc_read(ATMEL_TSADCC_CDR0);
- }
-
- return IRQ_HANDLED;
-}
-
-/*
- * The functions for inserting/removing us as a module.
- */
-
-static int atmel_tsadcc_probe(struct platform_device *pdev)
-{
- struct atmel_tsadcc *ts_dev;
- struct input_dev *input_dev;
- struct resource *res;
- struct at91_tsadcc_data *pdata = dev_get_platdata(&pdev->dev);
- int err;
- unsigned int prsc;
- unsigned int reg;
-
- if (!pdata)
- return -EINVAL;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "no mmio resource defined.\n");
- return -ENXIO;
- }
-
- /* Allocate memory for device */
- ts_dev = kzalloc(sizeof(struct atmel_tsadcc), GFP_KERNEL);
- if (!ts_dev) {
- dev_err(&pdev->dev, "failed to allocate memory.\n");
- return -ENOMEM;
- }
- platform_set_drvdata(pdev, ts_dev);
-
- input_dev = input_allocate_device();
- if (!input_dev) {
- dev_err(&pdev->dev, "failed to allocate input device.\n");
- err = -EBUSY;
- goto err_free_mem;
- }
-
- ts_dev->irq = platform_get_irq(pdev, 0);
- if (ts_dev->irq < 0) {
- dev_err(&pdev->dev, "no irq ID is designated.\n");
- err = -ENODEV;
- goto err_free_dev;
- }
-
- if (!request_mem_region(res->start, resource_size(res),
- "atmel tsadcc regs")) {
- dev_err(&pdev->dev, "resources is unavailable.\n");
- err = -EBUSY;
- goto err_free_dev;
- }
-
- tsc_base = ioremap(res->start, resource_size(res));
- if (!tsc_base) {
- dev_err(&pdev->dev, "failed to map registers.\n");
- err = -ENOMEM;
- goto err_release_mem;
- }
-
- err = request_irq(ts_dev->irq, atmel_tsadcc_interrupt, 0,
- pdev->dev.driver->name, ts_dev);
- if (err) {
- dev_err(&pdev->dev, "failed to allocate irq.\n");
- goto err_unmap_regs;
- }
-
- ts_dev->clk = clk_get(&pdev->dev, "tsc_clk");
- if (IS_ERR(ts_dev->clk)) {
- dev_err(&pdev->dev, "failed to get ts_clk\n");
- err = PTR_ERR(ts_dev->clk);
- goto err_free_irq;
- }
-
- ts_dev->input = input_dev;
- ts_dev->bufferedmeasure = 0;
-
- snprintf(ts_dev->phys, sizeof(ts_dev->phys),
- "%s/input0", dev_name(&pdev->dev));
-
- input_dev->name = "atmel touch screen controller";
- input_dev->phys = ts_dev->phys;
- input_dev->dev.parent = &pdev->dev;
-
- __set_bit(EV_ABS, input_dev->evbit);
- input_set_abs_params(input_dev, ABS_X, 0, 0x3FF, 0, 0);
- input_set_abs_params(input_dev, ABS_Y, 0, 0x3FF, 0, 0);
-
- input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
-
- /* clk_enable() always returns 0, no need to check it */
- clk_enable(ts_dev->clk);
-
- prsc = clk_get_rate(ts_dev->clk);
- dev_info(&pdev->dev, "Master clock is set at: %d Hz\n", prsc);
-
- if (!pdata->adc_clock)
- pdata->adc_clock = ADC_DEFAULT_CLOCK;
-
- prsc = (prsc / (2 * pdata->adc_clock)) - 1;
-
- /* saturate if this value is too high */
- if (cpu_is_at91sam9rl()) {
- if (prsc > PRESCALER_VAL(ATMEL_TSADCC_PRESCAL))
- prsc = PRESCALER_VAL(ATMEL_TSADCC_PRESCAL);
- } else {
- if (prsc > PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL))
- prsc = PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL);
- }
-
- dev_info(&pdev->dev, "Prescaler is set at: %d\n", prsc);
-
- reg = ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE |
- ((0x00 << 5) & ATMEL_TSADCC_SLEEP) | /* Normal Mode */
- ((0x01 << 6) & ATMEL_TSADCC_PENDET) | /* Enable Pen Detect */
- (prsc << 8) |
- ((0x26 << 16) & ATMEL_TSADCC_STARTUP) |
- ((pdata->pendet_debounce << 28) & ATMEL_TSADCC_PENDBC);
-
- atmel_tsadcc_write(ATMEL_TSADCC_CR, ATMEL_TSADCC_SWRST);
- atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
- atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);
- atmel_tsadcc_write(ATMEL_TSADCC_TSR,
- (pdata->ts_sample_hold_time << 24) & ATMEL_TSADCC_TSSHTIM);
-
- atmel_tsadcc_read(ATMEL_TSADCC_SR);
- atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);
-
- /* All went ok, so register to the input system */
- err = input_register_device(input_dev);
- if (err)
- goto err_fail;
-
- return 0;
-
-err_fail:
- clk_disable(ts_dev->clk);
- clk_put(ts_dev->clk);
-err_free_irq:
- free_irq(ts_dev->irq, ts_dev);
-err_unmap_regs:
- iounmap(tsc_base);
-err_release_mem:
- release_mem_region(res->start, resource_size(res));
-err_free_dev:
- input_free_device(input_dev);
-err_free_mem:
- kfree(ts_dev);
- return err;
-}
-
-static int atmel_tsadcc_remove(struct platform_device *pdev)
-{
- struct atmel_tsadcc *ts_dev = platform_get_drvdata(pdev);
- struct resource *res;
-
- free_irq(ts_dev->irq, ts_dev);
-
- input_unregister_device(ts_dev->input);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- iounmap(tsc_base);
- release_mem_region(res->start, resource_size(res));
-
- clk_disable(ts_dev->clk);
- clk_put(ts_dev->clk);
-
- kfree(ts_dev);
-
- return 0;
-}
-
-static struct platform_driver atmel_tsadcc_driver = {
- .probe = atmel_tsadcc_probe,
- .remove = atmel_tsadcc_remove,
- .driver = {
- .name = "atmel_tsadcc",
- },
-};
-module_platform_driver(atmel_tsadcc_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Atmel TouchScreen Driver");
-MODULE_AUTHOR("Dan Liang <dan.liang@xxxxxxxxx>");
-
--
1.8.3.2



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