ROHM BD71837 PMIC power button driver providing power-key press
information to user-space.
Signed-off-by: Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx>
---
drivers/input/misc/Kconfig | 10 +++++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/bd718xx-pwrkey.c | 90 +++++++++++++++++++++++++++++++++++++
include/linux/mfd/bd71837.h | 82 +++++++++++++++++++++++++++++++++
4 files changed, 183 insertions(+)
create mode 100644 drivers/input/misc/bd718xx-pwrkey.c
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 572b15fa18c2..694c05d3f9fb 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -96,6 +96,16 @@ config INPUT_ATMEL_CAPTOUCH
To compile this driver as a module, choose M here: the
module will be called atmel_captouch.
+config INPUT_BD718XX_PWRKEY
+ tristate "ROHM BD71837/BD71847 power key support"
+ depends on MFD_BD71837
+ help
+ Say Y here if you want support for the power key usually found
+ on boards using a ROHM BD71837/BD71847 compatible PMIC.
+
+ To compile this driver as a module, choose M here: the
+ module will be called bd718xx-pwrkey.
+
config INPUT_BMA150
tristate "BMA150/SMB380 acceleration sensor support"
depends on I2C
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 72cde28649e2..ea5b81cbf2bf 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_INPUT_ATI_REMOTE2) += ati_remote2.o
obj-$(CONFIG_INPUT_ATLAS_BTNS) += atlas_btns.o
obj-$(CONFIG_INPUT_ATMEL_CAPTOUCH) += atmel_captouch.o
obj-$(CONFIG_INPUT_BMA150) += bma150.o
+obj-$(CONFIG_INPUT_BD718XX_PWRKEY) += bd718xx-pwrkey.o
obj-$(CONFIG_INPUT_CM109) += cm109.o
obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o
obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o
diff --git a/drivers/input/misc/bd718xx-pwrkey.c b/drivers/input/misc/bd718xx-pwrkey.c
new file mode 100644
index 000000000000..e8ac9475c3cf
--- /dev/null
+++ b/drivers/input/misc/bd718xx-pwrkey.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 ROHM Semiconductors
+// bd718xx-pwrkey.c -- ROHM BD71837MWV and BD71847 power button driver
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/mfd/bd71837.h>
+
+struct bd718xx_pwrkey {
+ struct input_dev *idev;
+ struct bd71837 *mfd;
+ int irq;
+};
+
+static irqreturn_t button_irq(int irq, void *_priv)
+{
+ struct input_dev *idev = (struct input_dev *)_priv;
+
+ input_report_key(idev, KEY_POWER, 1);
+ input_sync(idev);
+ input_report_key(idev, KEY_POWER, 0);
+ input_sync(idev);
+
+ return IRQ_HANDLED;
+}
+
+static int bd718xx_pwr_btn_probe(struct platform_device *pdev)
+{
+ int err = -ENOMEM;
+ struct bd718xx_pwrkey *pk;
+
+ pk = devm_kzalloc(&pdev->dev, sizeof(*pk), GFP_KERNEL);
+ if (!pk)
+ goto err_out;
+
+ pk->mfd = dev_get_drvdata(pdev->dev.parent);
+
+ pk->idev = devm_input_allocate_device(&pdev->dev);
+ if (!pk->idev)
+ goto err_out;
+
+ pk->idev->name = "bd718xx-pwrkey";
+ pk->idev->phys = "bd718xx-pwrkey/input0";
+ pk->idev->dev.parent = &pdev->dev;
+
+ input_set_capability(pk->idev, EV_KEY, KEY_POWER);
+
+ err = platform_get_irq_byname(pdev, "pwr-btn-s");
+ if (err < 0) {
+ dev_err(&pdev->dev, "could not get power key interrupt\n");
+ goto err_out;
+ }
+
+ pk->irq = err;
+ err = devm_request_threaded_irq(&pdev->dev, pk->irq, NULL, &button_irq,
+ 0, "bd718xx-pwrkey", pk);
+ if (err)
+ goto err_out;
+
+ platform_set_drvdata(pdev, pk);
+ err = regmap_update_bits(pk->mfd->regmap,
+ BD71837_REG_PWRONCONFIG0,
+ BD718XX_PWRBTN_SHORT_PRESS_MASK,
+ BD718XX_PWRBTN_SHORT_PRESS_10MS);
+ if (err)
+ goto err_out;
+
+ err = input_register_device(pk->idev);
+
+err_out:
+
+ return err;
+}
+
+static struct platform_driver bd718xx_pwr_btn_driver = {
+ .probe = bd718xx_pwr_btn_probe,
+ .driver = {
+ .name = "bd718xx-pwrkey",
+ },
+};
+module_platform_driver(bd718xx_pwr_btn_driver);
+MODULE_DESCRIPTION("Power button driver for buttons connected to ROHM bd71837/bd71847 PMIC");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx>");
+
diff --git a/include/linux/mfd/bd71837.h b/include/linux/mfd/bd71837.h
index 641b7dba3076..410c0afa0452 100644
--- a/include/linux/mfd/bd71837.h
+++ b/include/linux/mfd/bd71837.h
@@ -100,6 +100,86 @@ enum {
BD71837_MAX_REGISTER = 0x100,
};
+/* register write induced reset settings */
+
+/* even though the bit zero is not SWRESET type we still want to write zero
+ * to it when changing type. Biz zero is 'SWRESET' trigger bit and if we
+ * write 1 to it we will trigger the action. So always write 0 to it when
+ * changning SWRESET action - no matter what we read from it.
+ */
+#define BD71837_SWRESET_TYPE_MASK 7
+#define BD71837_SWRESET_TYPE_DISABLED 0
+#define BD71837_SWRESET_TYPE_COLD 4
+#define BD71837_SWRESET_TYPE_WARM 6
+
+#define BD71837_SWRESET_RESET_MASK 1
+#define BD71837_SWRESET_RESET 1
+
+/* Poweroff state transition conditions */
+
+#define BD718XX_ON_REQ_POWEROFF_MASK 1
+#define BD718XX_SWRESET_POWEROFF_MASK 2
+#define BD718XX_WDOG_POWEROFF_MASK 4
+#define BD718XX_KEY_L_POWEROFF_MASK 8
+
+#define BD718XX_POWOFF_TO_SNVS 0
+#define BD718XX_POWOFF_TO_RDY 0xF
+
+#define BD718XX_POWOFF_TIME_MASK 0xF0
+enum {
+ BD718XX_POWOFF_TIME_5MS = 0,
+ BD718XX_POWOFF_TIME_10MS,
+ BD718XX_POWOFF_TIME_15MS,
+ BD718XX_POWOFF_TIME_20MS,
+ BD718XX_POWOFF_TIME_25MS,
+ BD718XX_POWOFF_TIME_30MS,
+ BD718XX_POWOFF_TIME_35MS,
+ BD718XX_POWOFF_TIME_40MS,
+ BD718XX_POWOFF_TIME_45MS,
+ BD718XX_POWOFF_TIME_50MS,
+ BD718XX_POWOFF_TIME_75MS,
+ BD718XX_POWOFF_TIME_100MS,
+ BD718XX_POWOFF_TIME_250MS,
+ BD718XX_POWOFF_TIME_500MS,
+ BD718XX_POWOFF_TIME_750MS,
+ BD718XX_POWOFF_TIME_1500MS
+};
+
+/* Poweron sequence state transition conditions */
+
+#define BD718XX_RDY_TO_SNVS_MASK 0xF
+#define BD718XX_SNVS_TO_RUN_MASK 0xF0
+
+#define BD718XX_PWR_TRIG_KEY_L 1
+#define BD718XX_PWR_TRIG_KEY_S 2
+#define BD718XX_PWR_TRIG_PMIC_ON 4
+#define BD718XX_PWR_TRIG_VSYS_UVLO 8
+#define BD718XX_RDY_TO_SNVS_SIFT 0
+#define BD718XX_SNVS_TO_RUN_SIFT 4
+
+/* Timeout value for detecting short press */
+
+#define BD718XX_PWRBTN_SHORT_PRESS_MASK 0xF
+
+enum {
+ BD718XX_PWRBTN_SHORT_PRESS_10MS = 0,
+ BD718XX_PWRBTN_SHORT_PRESS_500MS,
+ BD718XX_PWRBTN_SHORT_PRESS_1000MS,
+ BD718XX_PWRBTN_SHORT_PRESS_1500MS,
+ BD718XX_PWRBTN_SHORT_PRESS_2000MS,
+ BD718XX_PWRBTN_SHORT_PRESS_2500MS,
+ BD718XX_PWRBTN_SHORT_PRESS_3000MS,
+ BD718XX_PWRBTN_SHORT_PRESS_3500MS,
+ BD718XX_PWRBTN_SHORT_PRESS_4000MS,
+ BD718XX_PWRBTN_SHORT_PRESS_4500MS,
+ BD718XX_PWRBTN_SHORT_PRESS_5000MS,
+ BD718XX_PWRBTN_SHORT_PRESS_5500MS,
+ BD718XX_PWRBTN_SHORT_PRESS_6000MS,
+ BD718XX_PWRBTN_SHORT_PRESS_6500MS,
+ BD718XX_PWRBTN_SHORT_PRESS_7000MS,
+ BD718XX_PWRBTN_SHORT_PRESS_7500MS
+};
+
#define REGLOCK_PWRSEQ 0x1
#define REGLOCK_VREG 0x10
@@ -222,6 +302,7 @@ enum {
struct bd71837;
struct bd71837_pmic;
struct bd71837_clk;
+struct bd718xx_pwrkey;
/*
* Board platform data may be used to initialize regulators.
@@ -244,6 +325,7 @@ struct bd71837 {
struct bd71837_pmic *pmic;
struct bd71837_clk *clk;
+ struct bd718xx_pwrkey *pwrkey;
struct bd71837_board *of_plat_data;
};
--
2.14.3
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