[PATCH 1/2] mc13783: add power button support
Philippe Rétornaz
philippe.retornaz at epfl.ch
Mon May 31 15:28:59 EDT 2010
This adds support for the power-on buttons of MC13783 PMIC.
This is done using a misc input device.
Signed-off-by: Philippe Rétornaz <philippe.retornaz at epfl.ch>
---
drivers/input/misc/Kconfig | 7 +
drivers/input/misc/Makefile | 1 +
drivers/input/misc/mc13783-pwrbutton.c | 301 ++++++++++++++++++++++++++++++++
drivers/mfd/mc13783-core.c | 4 +
include/linux/mfd/mc13783.h | 19 ++
5 files changed, 332 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/misc/mc13783-pwrbutton.c
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 23140a3..2d25b16 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -340,4 +340,11 @@ config INPUT_PCAP
To compile this driver as a module, choose M here: the
module will be called pcap_keys.
+config INPUT_MC13783_ON
+ tristate "MC13783 ON buttons"
+ depends on MFD_MC13783
+ help
+ Support the ON buttons of MC13783 PMIC as an input device
+ reporting power button status.
+
endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 7e95a5d..c96311d 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -32,4 +32,5 @@ obj-$(CONFIG_INPUT_WINBOND_CIR) += winbond-cir.o
obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o
obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o
obj-$(CONFIG_INPUT_YEALINK) += yealink.o
+obj-$(CONFIG_INPUT_MC13783_ON) += mc13783-pwrbutton.o
diff --git a/drivers/input/misc/mc13783-pwrbutton.c b/drivers/input/misc/mc13783-pwrbutton.c
new file mode 100644
index 0000000..61cfcce
--- /dev/null
+++ b/drivers/input/misc/mc13783-pwrbutton.c
@@ -0,0 +1,301 @@
+/**
+ * mc13783-pwrbutton.c - MC13783 Power Button Input Driver
+ *
+ * Copyright (C) 2010 Philippe Rétornaz
+ *
+ * Based on twl4030-pwrbutton driver by:
+ * Peter De Schrijver <peter.de-schrijver at nokia.com>
+ * Felipe Balbi <felipe.balbi at nokia.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file "COPYING" in the main directory of this
+ * archive for more details.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/mc13783.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+struct mc13783_pwrb {
+ struct input_dev *pwr;
+ struct mc13783 *mc13783;
+#define MC13783_PWRB_B1_EMULATE_CAD (1 << 0)
+#define MC13783_PWRB_B2_EMULATE_CAD (1 << 1)
+#define MC13783_PWRB_B3_EMULATE_CAD (1 << 2)
+#define MC13783_PWRB_B1_POL_INVERT (1 << 3)
+#define MC13783_PWRB_B2_POL_INVERT (1 << 4)
+#define MC13783_PWRB_B3_POL_INVERT (1 << 5)
+ int flags;
+ unsigned int b1on_key;
+ unsigned int b2on_key;
+ unsigned int b3on_key;
+};
+
+#define MC13783_REG_INTERRUPT_SENSE_1 5
+#define MC13783_IRQSENSE1_ONOFD1S (1 << 3)
+#define MC13783_IRQSENSE1_ONOFD2S (1 << 4)
+#define MC13783_IRQSENSE1_ONOFD3S (1 << 5)
+
+#define MC13783_REG_POWER_CONTROL_2 15
+#define MC13783_POWER_CONTROL_2_ON1BDBNC 4
+#define MC13783_POWER_CONTROL_2_ON2BDBNC 6
+#define MC13783_POWER_CONTROL_2_ON3BDBNC 8
+#define MC13783_POWER_CONTROL_2_ON1BRSTEN (1 << 1)
+#define MC13783_POWER_CONTROL_2_ON2BRSTEN (1 << 2)
+#define MC13783_POWER_CONTROL_2_ON3BRSTEN (1 << 3)
+
+static irqreturn_t b1on_irq(int irq, void *_priv)
+{
+ struct mc13783_pwrb *priv = _priv;
+ int val;
+
+ mc13783_irq_ack(priv->mc13783, irq);
+ mc13783_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);
+
+ val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0;
+
+ if (priv->flags & MC13783_PWRB_B1_POL_INVERT)
+ val ^= 1;
+
+ if (val && priv->flags & MC13783_PWRB_B1_EMULATE_CAD)
+ kill_cad_pid(SIGINT, 1);
+
+ input_report_key(priv->pwr, priv->b1on_key, val);
+ input_sync(priv->pwr);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t b2on_irq(int irq, void *_priv)
+{
+ struct mc13783_pwrb *priv = _priv;
+ int val;
+
+ mc13783_irq_ack(priv->mc13783, irq);
+ mc13783_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);
+
+ val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0;
+
+ if (priv->flags & MC13783_PWRB_B2_POL_INVERT)
+ val ^= 1;
+
+ if (val && priv->flags & MC13783_PWRB_B2_EMULATE_CAD)
+ kill_cad_pid(SIGINT, 1);
+
+ input_report_key(priv->pwr, priv->b2on_key, val);
+ input_sync(priv->pwr);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t b3on_irq(int irq, void *_priv)
+{
+ struct mc13783_pwrb *priv = _priv;
+ int val;
+
+ mc13783_irq_ack(priv->mc13783, irq);
+ mc13783_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);
+
+ val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0;
+
+ if (priv->flags & MC13783_PWRB_B3_POL_INVERT)
+ val ^= 1;
+
+ if (val && priv->flags & MC13783_PWRB_B3_EMULATE_CAD)
+ kill_cad_pid(SIGINT, 1);
+
+ input_report_key(priv->pwr, priv->b3on_key, val);
+ input_sync(priv->pwr);
+ return IRQ_HANDLED;
+}
+
+static int __devinit mc13783_pwrbutton_probe(struct platform_device *pdev)
+{
+ struct mc13783_buttons_platform_data *pdata;
+ struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
+ struct input_dev *pwr;
+ struct mc13783_pwrb *priv;
+ int err = 0;
+ int reg = 0;
+
+ pdata = dev_get_platdata(&pdev->dev);
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "missing platform data\n");
+ return -ENODEV;
+ }
+
+ pwr = input_allocate_device();
+ if (!pwr) {
+ dev_dbg(&pdev->dev, "Can't allocate power button\n");
+ return -ENOMEM;
+ }
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+
+ if (!priv) {
+ dev_dbg(&pdev->dev, "Can't allocate power button\n");
+ goto free_input_dev;
+ }
+
+ pwr->evbit[0] = BIT_MASK(EV_KEY);
+
+ reg |= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC;
+ reg |= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC;
+ reg |= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC;
+
+ priv->pwr = pwr;
+ priv->mc13783 = mc13783;
+
+ mc13783_lock(mc13783);
+
+ if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) {
+ priv->b1on_key = pdata->b1on_key;
+ if (pdata->b1on_key != KEY_RESERVED)
+ pwr->keybit[BIT_WORD(pdata->b1on_key)] |=
+ BIT_MASK(pdata->b1on_key);
+
+ if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT)
+ priv->flags |= MC13783_PWRB_B1_POL_INVERT;
+ if (pdata->b1on_flags & MC13783_BUTTON_EMUL_CAD)
+ priv->flags |= MC13783_PWRB_B1_EMULATE_CAD;
+
+ if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN)
+ reg |= MC13783_POWER_CONTROL_2_ON1BRSTEN;
+
+ mc13783_irq_request(mc13783, MC13783_IRQ_ONOFD1, b1on_irq,
+ "b1on", priv);
+ }
+
+ if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) {
+ priv->b2on_key = pdata->b2on_key;
+ if (pdata->b2on_key != KEY_RESERVED)
+ pwr->keybit[BIT_WORD(pdata->b2on_key)] |=
+ BIT_MASK(pdata->b2on_key);
+
+ if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT)
+ priv->flags |= MC13783_PWRB_B2_POL_INVERT;
+ if (pdata->b2on_flags & MC13783_BUTTON_EMUL_CAD)
+ priv->flags |= MC13783_PWRB_B2_EMULATE_CAD;
+
+ if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN)
+ reg |= MC13783_POWER_CONTROL_2_ON2BRSTEN;
+
+ mc13783_irq_request(mc13783, MC13783_IRQ_ONOFD2, b2on_irq,
+ "b2on", priv);
+ }
+
+ if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) {
+ priv->b3on_key = pdata->b3on_key;
+ if (pdata->b3on_key != KEY_RESERVED)
+ pwr->keybit[BIT_WORD(pdata->b3on_key)] |=
+ BIT_MASK(pdata->b3on_key);
+
+ if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT)
+ priv->flags |= MC13783_PWRB_B3_POL_INVERT;
+ if (pdata->b3on_flags & MC13783_BUTTON_EMUL_CAD)
+ priv->flags |= MC13783_PWRB_B3_EMULATE_CAD;
+
+ if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN)
+ reg |= MC13783_POWER_CONTROL_2_ON3BRSTEN;
+
+ mc13783_irq_request(mc13783, MC13783_IRQ_ONOFD3, b3on_irq,
+ "b3on", priv);
+ }
+
+ mc13783_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg);
+
+ mc13783_unlock(mc13783);
+
+ pwr->name = "mc13783_pwrbutton";
+ pwr->phys = "mc13783_pwrbutton/input0";
+ pwr->dev.parent = &pdev->dev;
+
+ err = input_register_device(pwr);
+ if (err) {
+ dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
+ goto free_irq;
+ }
+
+ platform_set_drvdata(pdev, priv);
+
+ return 0;
+
+free_irq:
+ mc13783_lock(mc13783);
+ if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
+ mc13783_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv);
+ if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
+ mc13783_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv);
+ if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
+ mc13783_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv);
+ mc13783_unlock(mc13783);
+
+ kfree(priv);
+
+free_input_dev:
+ input_free_device(pwr);
+ return err;
+}
+
+static int __devexit mc13783_pwrbutton_remove(struct platform_device *pdev)
+{
+ struct mc13783_pwrb *priv = platform_get_drvdata(pdev);
+ struct mc13783_buttons_platform_data *pdata;
+ pdata = dev_get_platdata(&pdev->dev);
+
+ mc13783_lock(priv->mc13783);
+ if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
+ mc13783_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv);
+ if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
+ mc13783_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv);
+ if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
+ mc13783_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv);
+ mc13783_unlock(priv->mc13783);
+
+ input_unregister_device(priv->pwr);
+
+ kfree(priv);
+
+ return 0;
+}
+
+struct platform_driver mc13783_pwrbutton_driver = {
+ .probe = mc13783_pwrbutton_probe,
+ .remove = __devexit_p(mc13783_pwrbutton_remove),
+ .driver = {
+ .name = "mc13783-pwrbutton",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init mc13783_pwrbutton_init(void)
+{
+ return platform_driver_register(&mc13783_pwrbutton_driver);
+}
+module_init(mc13783_pwrbutton_init);
+
+static void __exit mc13783_pwrbutton_exit(void)
+{
+ platform_driver_unregister(&mc13783_pwrbutton_driver);
+}
+module_exit(mc13783_pwrbutton_exit);
+
+MODULE_ALIAS("platform:mc13783-pwrbutton");
+MODULE_DESCRIPTION("MC13783 Power Button");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Philippe Retornaz");
+
diff --git a/drivers/mfd/mc13783-core.c b/drivers/mfd/mc13783-core.c
index fecf38a..fb3e98b 100644
--- a/drivers/mfd/mc13783-core.c
+++ b/drivers/mfd/mc13783-core.c
@@ -683,6 +683,10 @@ err_revision:
mc13783_add_subdevice_pdata(mc13783, "mc13783-led",
pdata->leds, sizeof(*pdata->leds));
+ if (pdata->flags & MC13783_USE_BUTTON)
+ mc13783_add_subdevice_pdata(mc13783, "mc13783-pwrbutton",
+ pdata->buttons, sizeof(*pdata->buttons));
+
return 0;
}
diff --git a/include/linux/mfd/mc13783.h b/include/linux/mfd/mc13783.h
index 4a894f6..66981a5 100644
--- a/include/linux/mfd/mc13783.h
+++ b/include/linux/mfd/mc13783.h
@@ -128,6 +128,23 @@ struct mc13783_leds_platform_data {
char tc3_period;
};
+struct mc13783_buttons_platform_data {
+#define MC13783_BUTTON_DBNC_0MS 0
+#define MC13783_BUTTON_DBNC_30MS 1
+#define MC13783_BUTTON_DBNC_150MS 2
+#define MC13783_BUTTON_DBNC_750MS 3
+#define MC13783_BUTTON_ENABLE (1 << 2)
+#define MC13783_BUTTON_POL_INVERT (1 << 3)
+#define MC13783_BUTTON_RESET_EN (1 << 4)
+#define MC13783_BUTTON_EMUL_CAD (1 << 5)
+ int b1on_flags;
+ unsigned int b1on_key;
+ int b2on_flags;
+ unsigned int b2on_key;
+ int b3on_flags;
+ unsigned int b3on_key;
+};
+
/* to be cleaned up */
struct regulator_init_data;
@@ -145,6 +162,7 @@ struct mc13783_platform_data {
int num_regulators;
struct mc13783_regulator_init_data *regulators;
struct mc13783_leds_platform_data *leds;
+ struct mc13783_buttons_platform_data *buttons;
#define MC13783_USE_TOUCHSCREEN (1 << 0)
#define MC13783_USE_CODEC (1 << 1)
@@ -152,6 +170,7 @@ struct mc13783_platform_data {
#define MC13783_USE_RTC (1 << 3)
#define MC13783_USE_REGULATOR (1 << 4)
#define MC13783_USE_LED (1 << 5)
+#define MC13783_USE_BUTTON (1 << 6)
unsigned int flags;
};
--
1.6.3.3
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