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Date: Tue, 22 Sep 2015 17:00:18 -0500
From: "Franklin S Cooper Jr." <fcooper@...com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
CC: <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Maxime Ripard <maxime.ripard@...e-electrons.com>,
Lothar Waßmann <LW@...O-electronics.de>
Subject: Re: [PATCH 1/6] Input: edt-ft5x06 - switch to newer gpio framework
On Mon, Sep 21, 2015 at 03:55:33PM -0700, Dmitry Torokhov wrote:
> On Sat, Sep 12, 2015 at 10:45:46AM -0700, Dmitry Torokhov wrote:
> > From: Franklin S Cooper Jr <fcooper@...com>
> >
> > The current/old gpio framework used doesn't properly listen to
> > ACTIVE_LOW and ACTIVE_HIGH flags. The newer gpio framework takes into
> > account these flags when setting gpio values.
> >
> > Since the values being output were based on voltage and not logic they
> > change to reflect this difference. Also use gpiod_set_value_cansleep since
> > wake and reset pins can be provided by bus based io expanders.
> >
> > Switch from msleep(5) to udelay_range(5000,6000) to avoid check patch
> > warning.
> >
> > Signed-off-by: Franklin S Cooper Jr <fcooper@...com>
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
>
> Franklin, could you please give this series a spin so I can queue it for
> the next merge window?
>
> Thanks!
>
Sorry. Patch set worked fine for me.
Signed-off-by: Franklin S Cooper Jr <fcooper@...com>
> > ---
> > .../bindings/input/touchscreen/edt-ft5x06.txt | 4 +-
> > drivers/input/touchscreen/edt-ft5x06.c | 129 ++++++---------------
> > include/linux/input/edt-ft5x06.h | 3 -
> > 3 files changed, 40 insertions(+), 96 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
> > index 76db967..9330d4d 100644
> > --- a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
> > +++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
> > @@ -50,6 +50,6 @@ Example:
> > pinctrl-0 = <&edt_ft5x06_pins>;
> > interrupt-parent = <&gpio2>;
> > interrupts = <5 0>;
> > - reset-gpios = <&gpio2 6 1>;
> > - wake-gpios = <&gpio4 9 0>;
> > + reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>;
> > + wake-gpios = <&gpio4 9 GPIO_ACTIVE_HIGH>;
> > };
> > diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
> > index 48de1e8..5738722 100644
> > --- a/drivers/input/touchscreen/edt-ft5x06.c
> > +++ b/drivers/input/touchscreen/edt-ft5x06.c
> > @@ -34,8 +34,7 @@
> > #include <linux/delay.h>
> > #include <linux/debugfs.h>
> > #include <linux/slab.h>
> > -#include <linux/gpio.h>
> > -#include <linux/of_gpio.h>
> > +#include <linux/gpio/consumer.h>
> > #include <linux/input/mt.h>
> > #include <linux/input/touchscreen.h>
> > #include <linux/input/edt-ft5x06.h>
> > @@ -91,9 +90,9 @@ struct edt_ft5x06_ts_data {
> > u16 num_x;
> > u16 num_y;
> >
> > - int reset_pin;
> > - int irq_pin;
> > - int wake_pin;
> > + struct gpio_desc *reset_gpio;
> > + struct gpio_desc *wake_gpio;
> > + struct gpio_desc *irq_gpio;
> >
> > #if defined(CONFIG_DEBUG_FS)
> > struct dentry *debug_dir;
> > @@ -752,45 +751,6 @@ edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
> >
> > #endif /* CONFIG_DEBUGFS */
> >
> > -static int edt_ft5x06_ts_reset(struct i2c_client *client,
> > - struct edt_ft5x06_ts_data *tsdata)
> > -{
> > - int error;
> > -
> > - if (gpio_is_valid(tsdata->wake_pin)) {
> > - error = devm_gpio_request_one(&client->dev,
> > - tsdata->wake_pin, GPIOF_OUT_INIT_LOW,
> > - "edt-ft5x06 wake");
> > - if (error) {
> > - dev_err(&client->dev,
> > - "Failed to request GPIO %d as wake pin, error %d\n",
> > - tsdata->wake_pin, error);
> > - return error;
> > - }
> > -
> > - msleep(5);
> > - gpio_set_value(tsdata->wake_pin, 1);
> > - }
> > - if (gpio_is_valid(tsdata->reset_pin)) {
> > - /* this pulls reset down, enabling the low active reset */
> > - error = devm_gpio_request_one(&client->dev,
> > - tsdata->reset_pin, GPIOF_OUT_INIT_LOW,
> > - "edt-ft5x06 reset");
> > - if (error) {
> > - dev_err(&client->dev,
> > - "Failed to request GPIO %d as reset pin, error %d\n",
> > - tsdata->reset_pin, error);
> > - return error;
> > - }
> > -
> > - msleep(5);
> > - gpio_set_value(tsdata->reset_pin, 1);
> > - msleep(300);
> > - }
> > -
> > - return 0;
> > -}
> > -
> > static int edt_ft5x06_ts_identify(struct i2c_client *client,
> > struct edt_ft5x06_ts_data *tsdata,
> > char *fw_version)
> > @@ -931,30 +891,6 @@ edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
> > }
> > }
> >
> > -#ifdef CONFIG_OF
> > -static int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
> > - struct edt_ft5x06_ts_data *tsdata)
> > -{
> > - struct device_node *np = dev->of_node;
> > -
> > - /*
> > - * irq_pin is not needed for DT setup.
> > - * irq is associated via 'interrupts' property in DT
> > - */
> > - tsdata->irq_pin = -EINVAL;
> > - tsdata->reset_pin = of_get_named_gpio(np, "reset-gpios", 0);
> > - tsdata->wake_pin = of_get_named_gpio(np, "wake-gpios", 0);
> > -
> > - return 0;
> > -}
> > -#else
> > -static inline int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
> > - struct edt_ft5x06_ts_data *tsdata)
> > -{
> > - return -ENODEV;
> > -}
> > -#endif
> > -
> > static int edt_ft5x06_ts_probe(struct i2c_client *client,
> > const struct i2c_device_id *id)
> > {
> > @@ -973,32 +909,42 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
> > return -ENOMEM;
> > }
> >
> > - if (!pdata) {
> > - error = edt_ft5x06_i2c_ts_probe_dt(&client->dev, tsdata);
> > - if (error) {
> > - dev_err(&client->dev,
> > - "DT probe failed and no platform data present\n");
> > - return error;
> > - }
> > - } else {
> > - tsdata->reset_pin = pdata->reset_pin;
> > - tsdata->irq_pin = pdata->irq_pin;
> > - tsdata->wake_pin = -EINVAL;
> > + tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
> > + "reset", GPIOD_OUT_HIGH);
> > + if (IS_ERR(tsdata->reset_gpio)) {
> > + error = PTR_ERR(tsdata->reset_gpio);
> > + dev_err(&client->dev,
> > + "Failed to request GPIO reset pin, error %d\n", error);
> > + return error;
> > }
> >
> > - error = edt_ft5x06_ts_reset(client, tsdata);
> > - if (error)
> > + tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev,
> > + "wake", GPIOD_OUT_LOW);
> > + if (IS_ERR(tsdata->wake_gpio)) {
> > + error = PTR_ERR(tsdata->wake_gpio);
> > + dev_err(&client->dev,
> > + "Failed to request GPIO wake pin, error %d\n", error);
> > return error;
> > + }
> >
> > - if (gpio_is_valid(tsdata->irq_pin)) {
> > - error = devm_gpio_request_one(&client->dev, tsdata->irq_pin,
> > - GPIOF_IN, "edt-ft5x06 irq");
> > - if (error) {
> > - dev_err(&client->dev,
> > - "Failed to request GPIO %d, error %d\n",
> > - tsdata->irq_pin, error);
> > - return error;
> > - }
> > + tsdata->irq_gpio = devm_gpiod_get_optional(&client->dev,
> > + "irq", GPIOD_IN);
> > + if (IS_ERR(tsdata->irq_gpio)) {
> > + error = PTR_ERR(tsdata->irq_gpio);
> > + dev_err(&client->dev,
> > + "Failed to request GPIO irq pin, error %d\n", error);
> > + return error;
> > + }
> > +
> > + if (tsdata->wake_gpio) {
> > + usleep_range(5000, 6000);
> > + gpiod_set_value_cansleep(tsdata->wake_gpio, 1);
> > + }
> > +
> > + if (tsdata->reset_gpio) {
> > + usleep_range(5000, 6000);
> > + gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
> > + msleep(300);
> > }
> >
> > input = devm_input_allocate_device(&client->dev);
> > @@ -1074,7 +1020,8 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
> >
> > dev_dbg(&client->dev,
> > "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
> > - client->irq, tsdata->wake_pin, tsdata->reset_pin);
> > + client->irq, desc_to_gpio(tsdata->wake_gpio),
> > + desc_to_gpio(tsdata->reset_gpio));
> >
> > return 0;
> >
> > diff --git a/include/linux/input/edt-ft5x06.h b/include/linux/input/edt-ft5x06.h
> > index 8a1e0d1..5ca5b4c 100644
> > --- a/include/linux/input/edt-ft5x06.h
> > +++ b/include/linux/input/edt-ft5x06.h
> > @@ -10,9 +10,6 @@
> > */
> >
> > struct edt_ft5x06_platform_data {
> > - int irq_pin;
> > - int reset_pin;
> > -
> > /* startup defaults for operational parameters */
> > bool use_parameters;
> > u8 gain;
> > --
> > 2.6.0.rc0.131.gf624c3d
> >
>
> --
> Dmitry
--
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