| Message ID | 1382530220-27881-1-git-send-email-denis@eukrea.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 10/23/2013 07:10 AM, Denis Carikli wrote: > Cc: Rob Herring <rob.herring@calxeda.com> > Cc: Pawel Moll <pawel.moll@arm.com> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: Stephen Warren <swarren@wwwdotorg.org> > Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> > Cc: devicetree@vger.kernel.org > Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> > Cc: linux-input@vger.kernel.org > Cc: Sascha Hauer <kernel@pengutronix.de> > Cc: linux-arm-kernel@lists.infradead.org > Cc: Lothar Waßmann <LW@KARO-electronics.de> > Cc: Eric Bénard <eric@eukrea.com> > Signed-off-by: Denis Carikli <denis@eukrea.com> > --- > ChangeLog v4->v5: > - Most of the "if (ts->of)" were replaced by wrapping them in the > tsc2007_is_pen_down_valid and tsc2007_is_pen_down functions. > - Some whitespace cleanups. > - The devm_kzalloc call was fixed to make it compile. > --- > .../bindings/input/touchscreen/tsc2007.txt | 44 +++++ > drivers/input/touchscreen/tsc2007.c | 194 +++++++++++++++----- > 2 files changed, 197 insertions(+), 41 deletions(-) > create mode 100644 Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt > > diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt > new file mode 100644 > index 0000000..fadd3f6 > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt > @@ -0,0 +1,44 @@ > +* Texas Instruments tsc2007 touchscreen controller > + > +Required properties: > +- compatible: must be "ti,tsc2007". > +- reg: I2C address of the chip. > +- pinctrl-0: Should specify pin control groups used for this controller > + (see pinctrl bindings[0]). > +- pinctrl-names: Should contain only one value - "default" > + (see pinctrl bindings[0]). I'm confused why an i2c slave needs pinctl binding? > +- interrupt-parent: the phandle for the interrupt controller > + (see interrupt binding[1]). > +- interrupts: interrupt to which the chip is connected > + (see interrupt binding[1]). > +- ti,x-plate-ohms: X-plate resistance in ohms. > + > +Optional properties: > +- gpios: the interrupt gpio the chip is connected to (trough the penirq pin) > + (see GPIO binding[2] for more details). > +- max-rt: maximum pressure. > +- fuzzy: specifies the fuzz value that is used to filter noise from the event > + stream. > +- poll-period: how much time to wait(in millisecond) before reading again the > + values from the tsc2007. > + > +[0]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt > +[1]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt > +[2]: Documentation/devicetree/bindings/gpio/gpio.txt > + > +Example: > + &i2c1 { > + /* ... */ > + tsc2007@49 { > + compatible = "ti,tsc2007"; > + reg = <0x49>; > + pinctrl-names = "default"; > + pinctrl-0 = <&pinctrl_tsc2007_1>; > + interrupt-parent = <&gpio4>; > + interrupts = <0x0 0x8>; > + gpios = <&gpio4 0 0>; > + ti,x-plate-ohms = <180>; > + }; > + > + /* ... */ > + }; > diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c > index 0b67ba4..0625fe1 100644 > --- a/drivers/input/touchscreen/tsc2007.c > +++ b/drivers/input/touchscreen/tsc2007.c > @@ -26,6 +26,9 @@ > #include <linux/interrupt.h> > #include <linux/i2c.h> > #include <linux/i2c/tsc2007.h> > +#include <linux/of_device.h> > +#include <linux/of.h> > +#include <linux/of_gpio.h> > > #define TSC2007_MEASURE_TEMP0 (0x0 << 4) > #define TSC2007_MEASURE_AUX (0x2 << 4) > @@ -74,7 +77,10 @@ struct tsc2007 { > u16 max_rt; > unsigned long poll_delay; > unsigned long poll_period; > + int fuzzy; > + char of; > > + unsigned gpio; > int irq; > > wait_queue_head_t wait; > @@ -84,6 +90,11 @@ struct tsc2007 { > void (*clear_penirq)(void); > }; > > +static int tsc2007_get_pendown_state_dt(struct tsc2007 *ts) > +{ > + return !gpio_get_value(ts->gpio); > +} > + > static inline int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd) > { > s32 data; > @@ -142,6 +153,14 @@ static u32 tsc2007_calculate_pressure(struct tsc2007 *tsc, struct ts_event *tc) > return rt; > } > > +static bool tsc2007_is_pen_down_valid(struct tsc2007 *ts) > +{ > + if (ts->of) > + return gpio_is_valid(ts->gpio); > + else > + return ts->get_pendown_state ? true : false; > +} > + > static bool tsc2007_is_pen_down(struct tsc2007 *ts) > { > /* > @@ -158,10 +177,13 @@ static bool tsc2007_is_pen_down(struct tsc2007 *ts) > * to fall back on the pressure reading. > */ > > - if (!ts->get_pendown_state) > + if (!tsc2007_is_pen_down_valid(ts)) > return true; > > - return ts->get_pendown_state(); > + if (ts->of) > + return tsc2007_get_pendown_state_dt(ts); > + else > + return ts->get_pendown_state(); > } > > static irqreturn_t tsc2007_soft_irq(int irq, void *handle) > @@ -178,7 +200,7 @@ static irqreturn_t tsc2007_soft_irq(int irq, void *handle) > > rt = tsc2007_calculate_pressure(ts, &tc); > > - if (rt == 0 && !ts->get_pendown_state) { > + if(!rt && !tsc2007_is_pen_down_valid(ts)) { > /* > * If pressure reported is 0 and we don't have > * callback to check pendown state, we have to > @@ -228,7 +250,7 @@ static irqreturn_t tsc2007_hard_irq(int irq, void *handle) > { > struct tsc2007 *ts = handle; > > - if (!ts->get_pendown_state || likely(ts->get_pendown_state())) > + if (tsc2007_is_pen_down(ts)) > return IRQ_WAKE_THREAD; > > if (ts->clear_penirq) > @@ -273,34 +295,65 @@ static void tsc2007_close(struct input_dev *input_dev) > tsc2007_stop(ts); > } > > -static int tsc2007_probe(struct i2c_client *client, > - const struct i2c_device_id *id) > +#ifdef CONFIG_OF > +static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts, > + struct device_node *np) > { > - struct tsc2007 *ts; > - struct tsc2007_platform_data *pdata = client->dev.platform_data; > - struct input_dev *input_dev; > - int err; > - > - if (!pdata) { > - dev_err(&client->dev, "platform data is required!\n"); > + int err = 0; > + u32 val32; > + u64 val64; > + > + if (!of_property_read_u32(np, "max-rt", &val32)) > + ts->max_rt = val32; > + else > + ts->max_rt = MAX_12BIT; These functions don't overwrite the value if the property isn't present. So you can set the values to the defaults and just pass the variable (i.e. ts->max_rt) to of_property_read_u32 directly. Rob -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, Rob Herring wrote: > On 10/23/2013 07:10 AM, Denis Carikli wrote: [...] > > diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt > > new file mode 100644 > > index 0000000..fadd3f6 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt > > @@ -0,0 +1,44 @@ > > +* Texas Instruments tsc2007 touchscreen controller > > + > > +Required properties: > > +- compatible: must be "ti,tsc2007". > > +- reg: I2C address of the chip. > > +- pinctrl-0: Should specify pin control groups used for this controller > > + (see pinctrl bindings[0]). > > +- pinctrl-names: Should contain only one value - "default" > > + (see pinctrl bindings[0]). > > I'm confused why an i2c slave needs pinctl binding? > for the pendetect GPIO. [...] > > diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c > > index 0b67ba4..0625fe1 100644 > > --- a/drivers/input/touchscreen/tsc2007.c > > +++ b/drivers/input/touchscreen/tsc2007.c > > @@ -26,6 +26,9 @@ > > #include <linux/interrupt.h> > > #include <linux/i2c.h> > > #include <linux/i2c/tsc2007.h> > > +#include <linux/of_device.h> > > +#include <linux/of.h> > > +#include <linux/of_gpio.h> > > > > #define TSC2007_MEASURE_TEMP0 (0x0 << 4) > > #define TSC2007_MEASURE_AUX (0x2 << 4) > > @@ -74,7 +77,10 @@ struct tsc2007 { > > u16 max_rt; > > unsigned long poll_delay; > > unsigned long poll_period; > > + int fuzzy; > > + char of; > > > > + unsigned gpio; > > int irq; > > > > wait_queue_head_t wait; [...] > > @@ -273,34 +295,65 @@ static void tsc2007_close(struct input_dev *input_dev) > > tsc2007_stop(ts); > > } > > > > -static int tsc2007_probe(struct i2c_client *client, > > - const struct i2c_device_id *id) > > +#ifdef CONFIG_OF > > +static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts, > > + struct device_node *np) > > { > > - struct tsc2007 *ts; > > - struct tsc2007_platform_data *pdata = client->dev.platform_data; > > - struct input_dev *input_dev; > > - int err; > > - > > - if (!pdata) { > > - dev_err(&client->dev, "platform data is required!\n"); > > + int err = 0; > > + u32 val32; > > + u64 val64; > > + > > + if (!of_property_read_u32(np, "max-rt", &val32)) > > + ts->max_rt = val32; > > + else > > + ts->max_rt = MAX_12BIT; > > These functions don't overwrite the value if the property isn't present. > So you can set the values to the defaults and just pass the variable > (i.e. ts->max_rt) to of_property_read_u32 directly. > Not quite. Since max_rt is an u16 you can't pass it to of_property_read_u32(). And using of_property_read_u16() requires the abominable DT notation: "/bits/ 16 <value>;" Lothar Waßmann
On Thu, Oct 24, 2013 at 08:51:50AM +0200, Lothar Waßmann wrote: > Hi, > > Rob Herring wrote: > > On 10/23/2013 07:10 AM, Denis Carikli wrote: > [...] > > > diff --git > a/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt > b/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt > > > new file mode 100644 > > > index 0000000..fadd3f6 > > > --- /dev/null > > > +++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt > > > @@ -0,0 +1,44 @@ > > > +* Texas Instruments tsc2007 touchscreen controller > > > + > > > +Required properties: > > > +- compatible: must be "ti,tsc2007". > > > +- reg: I2C address of the chip. > > > +- pinctrl-0: Should specify pin control groups used for this controller > > > + (see pinctrl bindings[0]). > > > +- pinctrl-names: Should contain only one value - "default" > > > + (see pinctrl bindings[0]). > > > > I'm confused why an i2c slave needs pinctl binding? > > > for the pendetect GPIO. Shouldn't that be done transparently to users of the GPIO API? I was under the impression that gpio_request() would set everything up (or return an error if unable to do so) so that the GPIO can be used, including any required pinmuxing. > [...] > > > diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c > > > index 0b67ba4..0625fe1 100644 > > > --- a/drivers/input/touchscreen/tsc2007.c > > > +++ b/drivers/input/touchscreen/tsc2007.c > > > @@ -26,6 +26,9 @@ > > > #include <linux/interrupt.h> > > > #include <linux/i2c.h> > > > #include <linux/i2c/tsc2007.h> > > > +#include <linux/of_device.h> > > > +#include <linux/of.h> > > > +#include <linux/of_gpio.h> > > > > > > #define TSC2007_MEASURE_TEMP0 (0x0 << 4) > > > #define TSC2007_MEASURE_AUX (0x2 << 4) > > > @@ -74,7 +77,10 @@ struct tsc2007 { > > > u16 max_rt; > > > unsigned long poll_delay; > > > unsigned long poll_period; > > > + int fuzzy; > > > + char of; > > > > > > + unsigned gpio; > > > int irq; > > > > > > wait_queue_head_t wait; > [...] > > > @@ -273,34 +295,65 @@ static void tsc2007_close(struct input_dev *input_dev) > > > tsc2007_stop(ts); > > > } > > > > > > -static int tsc2007_probe(struct i2c_client *client, > > > - const struct i2c_device_id *id) > > > +#ifdef CONFIG_OF > > > +static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts, > > > + struct device_node *np) > > > { > > > - struct tsc2007 *ts; > > > - struct tsc2007_platform_data *pdata = client->dev.platform_data; > > > - struct input_dev *input_dev; > > > - int err; > > > - > > > - if (!pdata) { > > > - dev_err(&client->dev, "platform data is required!\n"); > > > + int err = 0; > > > + u32 val32; > > > + u64 val64; > > > + > > > + if (!of_property_read_u32(np, "max-rt", &val32)) > > > + ts->max_rt = val32; > > > + else > > > + ts->max_rt = MAX_12BIT; > > > > These functions don't overwrite the value if the property isn't present. > > So you can set the values to the defaults and just pass the variable > > (i.e. ts->max_rt) to of_property_read_u32 directly. > > > Not quite. Since max_rt is an u16 you can't pass it to > of_property_read_u32(). And using of_property_read_u16() requires the > abominable DT notation: "/bits/ 16 <value>;" In that case perhaps you need to check that whatever u32 value you read from DT is actually in the expected range before assigning to u16? Thierry
diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt new file mode 100644 index 0000000..fadd3f6 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt @@ -0,0 +1,44 @@ +* Texas Instruments tsc2007 touchscreen controller + +Required properties: +- compatible: must be "ti,tsc2007". +- reg: I2C address of the chip. +- pinctrl-0: Should specify pin control groups used for this controller + (see pinctrl bindings[0]). +- pinctrl-names: Should contain only one value - "default" + (see pinctrl bindings[0]). +- interrupt-parent: the phandle for the interrupt controller + (see interrupt binding[1]). +- interrupts: interrupt to which the chip is connected + (see interrupt binding[1]). +- ti,x-plate-ohms: X-plate resistance in ohms. + +Optional properties: +- gpios: the interrupt gpio the chip is connected to (trough the penirq pin) + (see GPIO binding[2] for more details). +- max-rt: maximum pressure. +- fuzzy: specifies the fuzz value that is used to filter noise from the event + stream. +- poll-period: how much time to wait(in millisecond) before reading again the + values from the tsc2007. + +[0]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt +[1]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt +[2]: Documentation/devicetree/bindings/gpio/gpio.txt + +Example: + &i2c1 { + /* ... */ + tsc2007@49 { + compatible = "ti,tsc2007"; + reg = <0x49>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_tsc2007_1>; + interrupt-parent = <&gpio4>; + interrupts = <0x0 0x8>; + gpios = <&gpio4 0 0>; + ti,x-plate-ohms = <180>; + }; + + /* ... */ + }; diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c index 0b67ba4..0625fe1 100644 --- a/drivers/input/touchscreen/tsc2007.c +++ b/drivers/input/touchscreen/tsc2007.c @@ -26,6 +26,9 @@ #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/i2c/tsc2007.h> +#include <linux/of_device.h> +#include <linux/of.h> +#include <linux/of_gpio.h> #define TSC2007_MEASURE_TEMP0 (0x0 << 4) #define TSC2007_MEASURE_AUX (0x2 << 4) @@ -74,7 +77,10 @@ struct tsc2007 { u16 max_rt; unsigned long poll_delay; unsigned long poll_period; + int fuzzy; + char of; + unsigned gpio; int irq; wait_queue_head_t wait; @@ -84,6 +90,11 @@ struct tsc2007 { void (*clear_penirq)(void); }; +static int tsc2007_get_pendown_state_dt(struct tsc2007 *ts) +{ + return !gpio_get_value(ts->gpio); +} + static inline int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd) { s32 data; @@ -142,6 +153,14 @@ static u32 tsc2007_calculate_pressure(struct tsc2007 *tsc, struct ts_event *tc) return rt; } +static bool tsc2007_is_pen_down_valid(struct tsc2007 *ts) +{ + if (ts->of) + return gpio_is_valid(ts->gpio); + else + return ts->get_pendown_state ? true : false; +} + static bool tsc2007_is_pen_down(struct tsc2007 *ts) { /* @@ -158,10 +177,13 @@ static bool tsc2007_is_pen_down(struct tsc2007 *ts) * to fall back on the pressure reading. */ - if (!ts->get_pendown_state) + if (!tsc2007_is_pen_down_valid(ts)) return true; - return ts->get_pendown_state(); + if (ts->of) + return tsc2007_get_pendown_state_dt(ts); + else + return ts->get_pendown_state(); } static irqreturn_t tsc2007_soft_irq(int irq, void *handle) @@ -178,7 +200,7 @@ static irqreturn_t tsc2007_soft_irq(int irq, void *handle) rt = tsc2007_calculate_pressure(ts, &tc); - if (rt == 0 && !ts->get_pendown_state) { + if(!rt && !tsc2007_is_pen_down_valid(ts)) { /* * If pressure reported is 0 and we don't have * callback to check pendown state, we have to @@ -228,7 +250,7 @@ static irqreturn_t tsc2007_hard_irq(int irq, void *handle) { struct tsc2007 *ts = handle; - if (!ts->get_pendown_state || likely(ts->get_pendown_state())) + if (tsc2007_is_pen_down(ts)) return IRQ_WAKE_THREAD; if (ts->clear_penirq) @@ -273,34 +295,65 @@ static void tsc2007_close(struct input_dev *input_dev) tsc2007_stop(ts); } -static int tsc2007_probe(struct i2c_client *client, - const struct i2c_device_id *id) +#ifdef CONFIG_OF +static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts, + struct device_node *np) { - struct tsc2007 *ts; - struct tsc2007_platform_data *pdata = client->dev.platform_data; - struct input_dev *input_dev; - int err; - - if (!pdata) { - dev_err(&client->dev, "platform data is required!\n"); + int err = 0; + u32 val32; + u64 val64; + + if (!of_property_read_u32(np, "max-rt", &val32)) + ts->max_rt = val32; + else + ts->max_rt = MAX_12BIT; + + if (!of_property_read_u32(np, "fuzzy", &val32)) + ts->fuzzy = val32; + + if (!of_property_read_u64(np, "poll-period", &val64)) + ts->poll_period = val64; + else + ts->poll_period = 1; + + if (!of_property_read_u32(np, "ti,x-plate-ohms", &val32)) { + ts->x_plate_ohms = val32; + } else { + dev_err(&client->dev, + "Error: lacking ti,x-plate-ohms devicetree property. (err %d).", + err); return -EINVAL; } - if (!i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_READ_WORD_DATA)) - return -EIO; + ts->gpio = of_get_gpio(np, 0); + if (!gpio_is_valid(ts->gpio)) + dev_err(&client->dev, + "GPIO not found (of_get_gpio returned %d)\n", + ts->gpio); - ts = kzalloc(sizeof(struct tsc2007), GFP_KERNEL); - input_dev = input_allocate_device(); - if (!ts || !input_dev) { - err = -ENOMEM; - goto err_free_mem; - } + /* Used to detect if it is probed trough the device tree, + * in order to be able to use that information in the IRQ handler. + */ + ts->of = 1; - ts->client = client; - ts->irq = client->irq; - ts->input = input_dev; - init_waitqueue_head(&ts->wait); + return 0; +} +#else +static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts, + struct device_node *np) +{ + return -ENODEV; +} +#endif + +static int tsc2007_probe_pdev(struct i2c_client *client, struct tsc2007 *ts, + struct tsc2007_platform_data *pdata, + const struct i2c_device_id *id) +{ + if (!pdata) { + dev_err(&client->dev, "platform data is required!\n"); + return -EINVAL; + } ts->model = pdata->model; ts->x_plate_ohms = pdata->x_plate_ohms; @@ -309,13 +362,57 @@ static int tsc2007_probe(struct i2c_client *client, ts->poll_period = pdata->poll_period ? : 1; ts->get_pendown_state = pdata->get_pendown_state; ts->clear_penirq = pdata->clear_penirq; + ts->fuzzy = pdata->fuzzy; if (pdata->x_plate_ohms == 0) { dev_err(&client->dev, "x_plate_ohms is not set up in platform data"); - err = -EINVAL; - goto err_free_mem; + return -EINVAL; } + /* Used to detect if it is probed trough the device tree, + * in order to be able to use that information in the IRQ handler. + */ + ts->of = 0; + + return 0; +} + +static int tsc2007_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device_node *np = client->dev.of_node; + struct tsc2007_platform_data *pdata = client->dev.platform_data; + struct tsc2007 *ts; + struct input_dev *input_dev; + int err = 0; + + ts = devm_kzalloc(&client->dev, sizeof(struct tsc2007), GFP_KERNEL); + if (!ts) + return -ENOMEM; + + if (np) + err = tsc2007_probe_dt(client, ts, np); + else + err = tsc2007_probe_pdev(client, ts, pdata, id); + + if (err) + return err; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_WORD_DATA)) + return -EIO; + + input_dev = input_allocate_device(); + if (!input_dev) { + err = -ENOMEM; + goto err_free_input; + }; + + ts->client = client; + ts->irq = client->irq; + ts->input = input_dev; + init_waitqueue_head(&ts->wait); + snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&client->dev)); @@ -331,19 +428,21 @@ static int tsc2007_probe(struct i2c_client *client, 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, MAX_12BIT, pdata->fuzzx, 0); - input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, pdata->fuzzy, 0); + input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, ts->fuzzy, 0); + input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, ts->fuzzy, 0); input_set_abs_params(input_dev, ABS_PRESSURE, 0, MAX_12BIT, - pdata->fuzzz, 0); + ts->fuzzy, 0); - if (pdata->init_platform_hw) - pdata->init_platform_hw(); + if (!np) { + if (pdata->init_platform_hw) + pdata->init_platform_hw(); + } err = request_threaded_irq(ts->irq, tsc2007_hard_irq, tsc2007_soft_irq, IRQF_ONESHOT, client->dev.driver->name, ts); if (err < 0) { dev_err(&client->dev, "irq %d busy?\n", ts->irq); - goto err_free_mem; + goto err_free_input; } tsc2007_stop(ts); @@ -358,23 +457,27 @@ static int tsc2007_probe(struct i2c_client *client, err_free_irq: free_irq(ts->irq, ts); - if (pdata->exit_platform_hw) - pdata->exit_platform_hw(); - err_free_mem: + if (!np) { + if (pdata->exit_platform_hw) + pdata->exit_platform_hw(); + } + err_free_input: input_free_device(input_dev); - kfree(ts); return err; } static int tsc2007_remove(struct i2c_client *client) { + struct device_node *np = client->dev.of_node; struct tsc2007 *ts = i2c_get_clientdata(client); struct tsc2007_platform_data *pdata = client->dev.platform_data; free_irq(ts->irq, ts); - if (pdata->exit_platform_hw) - pdata->exit_platform_hw(); + if (!np) { + if (pdata->exit_platform_hw) + pdata->exit_platform_hw(); + } input_unregister_device(ts->input); kfree(ts); @@ -389,10 +492,19 @@ static const struct i2c_device_id tsc2007_idtable[] = { MODULE_DEVICE_TABLE(i2c, tsc2007_idtable); +#ifdef CONFIG_OF +static const struct of_device_id tsc2007_of_match[] = { + { .compatible = "ti,tsc2007" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, tsc2007_of_match); +#endif + static struct i2c_driver tsc2007_driver = { .driver = { .owner = THIS_MODULE, - .name = "tsc2007" + .name = "tsc2007", + .of_match_table = of_match_ptr(tsc2007_of_match), }, .id_table = tsc2007_idtable, .probe = tsc2007_probe,
Cc: Rob Herring <rob.herring@calxeda.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: devicetree@vger.kernel.org Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: linux-input@vger.kernel.org Cc: Sascha Hauer <kernel@pengutronix.de> Cc: linux-arm-kernel@lists.infradead.org Cc: Lothar Waßmann <LW@KARO-electronics.de> Cc: Eric Bénard <eric@eukrea.com> Signed-off-by: Denis Carikli <denis@eukrea.com> --- ChangeLog v4->v5: - Most of the "if (ts->of)" were replaced by wrapping them in the tsc2007_is_pen_down_valid and tsc2007_is_pen_down functions. - Some whitespace cleanups. - The devm_kzalloc call was fixed to make it compile. --- .../bindings/input/touchscreen/tsc2007.txt | 44 +++++ drivers/input/touchscreen/tsc2007.c | 194 +++++++++++++++----- 2 files changed, 197 insertions(+), 41 deletions(-) create mode 100644 Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt