[PATCH v3 0/6] input: Introduce support for SPMI haptics found on Qcom PMICs

[PATCH v3 0/6] input: Introduce support for SPMI haptics found on Qcom PMICs

[Caleb Connolly]

This series introduces a driver for the SPMI haptics hardware block
found in Qualcomm PMICs. SPMI haptics support LRA (Linear Resonant
Actuator) style haptics, as well as ERM (Eccentric Rotating Mass).
It also supports several modes of driving the haptics, e.g. by loading
the pattern to play into an internal buffer, or using PWM.

More information about the hardware can be found here:
        https://gitlab.com/sdm845-mainline/linux/-/wikis/PMI8998-QPNP-Haptics

This driver has been written based on downstream sources as no public
documentation is available. It includes initial support for LRA haptics
in buffer mode, this combination seems to be the most common and will
enable haptics on the OnePlus 6 and 6T, PocoPhone F1, OnePlus 5 and
several other Qualcomm devices with mainline kernel support.

The driver is implemented using the ff-memless (forcefeedback) input
framework and makes an attempt to control the strength of vibration relative
to the magnitude set from userspace.

 ~ Caleb

Changes since v2:
 - Addressed Rob's comments on dt-bindings (I'm not sure what to do
   about the pmic compatible?)
 - Fixed some typos

Changes since v1:
 - Replace old QPNP naming with SPMI
 - Address Bjorn's comments on the driver, various style and code cleanups
 - Address Bjorn's comments on the DT bindings and DTS
 - Pickup patches from Joel and Jami to enable haptics on the OnePlus 5
   and Poco F1.

---
Caleb Connolly (4):
  dt-bindings: input: add Qualcomm SPMI haptics driver
  input: add Qualcomm SPMI haptics driver
  arm64: dts: qcom: pmi8998: introduce spmi haptics
  arm64: dts: qcom: sdm845-oneplus-common: add haptics

Jami Kettunen (1):
  arm64: dts: qcom: msm8998-oneplus-common: Enable PMI8998 haptics

Joel Selvaraj (1):
  arm64: dts: qcom: sdm845-xiaomi-beryllium: add haptics

 .../bindings/input/qcom,spmi-haptics.yaml     | 128 +++
 .../boot/dts/qcom/msm8998-oneplus-common.dtsi |   6 +
 arch/arm64/boot/dts/qcom/pmi8998.dtsi         |  16 +
 .../boot/dts/qcom/sdm845-oneplus-common.dtsi  |   6 +
 .../boot/dts/qcom/sdm845-xiaomi-beryllium.dts |   5 +
 drivers/input/misc/Kconfig                    |  12 +
 drivers/input/misc/Makefile                   |   1 +
 drivers/input/misc/qcom-spmi-haptics.c        | 981 ++++++++++++++++++
 include/dt-bindings/input/qcom,spmi-haptics.h |  32 +
 9 files changed, 1187 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/qcom,spmi-haptics.yaml
 create mode 100644 drivers/input/misc/qcom-spmi-haptics.c
 create mode 100644 include/dt-bindings/input/qcom,spmi-haptics.h

--
2.32.0

[PATCH v3 1/6] dt-bindings: input: add Qualcomm SPMI haptics driver

[Caleb Connolly]

Add bindings for qcom PMIC SPMI haptics driver.

Signed-off-by: Caleb Connolly <caleb@connolly.tech>
---
 .../bindings/input/qcom,spmi-haptics.yaml     | 128 ++++++++++++++++++
 include/dt-bindings/input/qcom,spmi-haptics.h |  32 +++++
 2 files changed, 160 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/qcom,spmi-haptics.yaml
 create mode 100644 include/dt-bindings/input/qcom,spmi-haptics.h

diff --git a/Documentation/devicetree/bindings/input/qcom,spmi-haptics.yaml b/Documentation/devicetree/bindings/input/qcom,spmi-haptics.yaml
new file mode 100644
index 000000000000..21e1fba98ae1
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/qcom,spmi-haptics.yaml
@@ -0,0 +1,128 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2020 Unisoc Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/qcom,spmi-haptics.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Technologies Inc PMI8998 spmi haptics
+
+maintainers:
+  - Caleb Connolly <caleb@connolly.tech>
+
+description: |
+  Qualcomm SPMI haptics is a peripheral on some QTI PMICs. It supports linear resonant
+  actuators and eccentric rotating mass type haptics commonly found in mobile devices.
+  It supports multiple sources of wave data such as an internal buffer, direct play
+  (from kernel or userspace) as well as an audio mode.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - qcom,pmi8998-haptics
+          - qcom,pmi8996-haptics
+          - qcom,pmi8941-haptics
+      - const: qcom,spmi-haptics
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: short circuit interrupt
+      - description: play interrupt
+
+  interrupt-names:
+    items:
+      - const: short
+      - const: play
+
+  qcom,actuator-type:
+    description: |
+      The type of actuator attached to the hardware.
+      Allowed values are,
+        0 - HAP_TYPE_LRA
+        1 - HAP_TYPE_ERM
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1 ]
+    default: 0
+
+  qcom,wave-shape:
+    description: |
+      Selects the wave shape to use.
+      Allowed values are,
+        0 - HAP_WAVE_SINE
+        1 - HAP_WAVE_SQUARE
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1 ]
+    default: 0
+
+  qcom,play-mode:
+    description: |
+      Selects the play mode to use.
+      Allowed values are,
+        0 - HAP_PLAY_DIRECT
+        1 - HAP_PLAY_BUFFER
+        2 - HAP_PLAY_AUDIO
+        3 - HAP_PLAY_PWM
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1, 2, 3 ]
+    default: 2
+
+  qcom,wave-play-rate-us:
+    description: |
+      Wave play rate in microseconds, 1/f where f
+      is the resonant frequency of the actuator.
+    minimum: 0
+    maximum: 20475
+
+  qcom,brake-pattern:
+    minItems: 4
+    maxItems: 4
+    description: |
+      The brake pattern is an array of amplitudes
+      used to brake the haptics. Allowed values are,
+        0 - 0V
+        1 - Vmax/4
+        2 - Vmax/2
+        3 - Vmax
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    default: [0x3, 0x3, 0x2, 0x1]
+    items:
+      enum: [ 0, 1, 2, 3 ]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - qcom,wave-play-rate-us
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/spmi/spmi.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/input/qcom,spmi-haptics.h>
+
+    pmic@3 {
+      compatible = "qcom,pmi8998", "qcom,spmi-pmic";
+      reg = <0x3 SPMI_USID>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      pmi8998_haptics: haptics@c000 {
+        compatible = "qcom,pmi8998-haptics", "qcom,spmi-haptics";
+        reg = <0xc000>;
+
+        interrupts = <0x3 0xc0 0x0 IRQ_TYPE_EDGE_BOTH>,
+                     <0x3 0xc0 0x1 IRQ_TYPE_EDGE_BOTH>;
+        interrupt-names = "short", "play";
+
+        qcom,wave-shape = <HAP_WAVE_SINE>;
+        qcom,wave-play-rate-us = <4255>;
+        qcom,play-mode = <HAP_PLAY_BUFFER>;
+        qcom,brake-pattern = <0x3 0x3 0x2 0x1>;
+      };
+    };
diff --git a/include/dt-bindings/input/qcom,spmi-haptics.h b/include/dt-bindings/input/qcom,spmi-haptics.h
new file mode 100644
index 000000000000..b3b9478b3217
--- /dev/null
+++ b/include/dt-bindings/input/qcom,spmi-haptics.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause) */
+/*
+ * This header provides constants for QCOM SPMI haptics hardware configuration.
+ */
+
+#ifndef _DT_BINDINGS_QCOM_PMIC_SPMI_HAPTICS_
+#define _DT_BINDINGS_QCOM_PMIC_SPMI_HAPTICS_
+
+// Actuator types
+#define HAP_TYPE_LRA		0
+#define HAP_TYPE_ERM		1
+
+// LRA Wave type
+#define HAP_WAVE_SINE		0
+#define HAP_WAVE_SQUARE		1
+
+// Play modes
+#define HAP_PLAY_DIRECT		0
+#define HAP_PLAY_BUFFER		1
+#define HAP_PLAY_AUDIO		2
+#define HAP_PLAY_PWM		3
+
+#define HAP_PLAY_MAX		HAP_PLAY_PWM
+
+// Auto resonance type
+#define HAP_AUTO_RES_NONE	0
+#define HAP_AUTO_RES_ZXD	1
+#define HAP_AUTO_RES_QWD	2
+#define HAP_AUTO_RES_MAX_QWD	3
+#define HAP_AUTO_RES_ZXD_EOP	4
+
+#endif /* _DT_BINDINGS_QCOM_PMIC_SPMI_HAPTICS_ */
--
2.32.0

[PATCH v3 2/6] input: add Qualcomm SPMI haptics driver

[Caleb Connolly]

Add support for the haptics found in pmi8998 and related PMICs.
Based on the ff-memless interface. Currently this driver provides
a partial implementation of hardware features.

This driver only supports LRAs (Linear Resonant Actuators) in the "buffer"
mode with a single wave pattern.

Signed-off-by: Caleb Connolly <caleb@connolly.tech>
---
 drivers/input/misc/Kconfig             |  12 +
 drivers/input/misc/Makefile            |   1 +
 drivers/input/misc/qcom-spmi-haptics.c | 981 +++++++++++++++++++++++++
 3 files changed, 994 insertions(+)
 create mode 100644 drivers/input/misc/qcom-spmi-haptics.c

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 498cde376981..de422aeb8e5f 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -186,6 +186,18 @@ config INPUT_PMIC8XXX_PWRKEY
 	  To compile this driver as a module, choose M here: the
 	  module will be called pmic8xxx-pwrkey.

+config INPUT_QCOM_SPMI_HAPTICS
+	tristate "Qualcomm SPMI HAPTICS"
+	depends on ARCH_QCOM
+	depends on SPMI
+	select INPUT_FF_MEMLESS
+	help
+	  This option enables support for the haptics found in pmi8998 and
+	  related PMICs. Based on the ff-memless interface.
+
+	  To compile this driver as module, choose M here: the
+	  module will be called qcom_spmi_haptics.
+
 config INPUT_SPARCSPKR
 	tristate "SPARC Speaker support"
 	depends on PCI && SPARC64
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index f593beed7e05..bf5579f335d5 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -65,6 +65,7 @@ obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY)	+= pmic8xxx-pwrkey.o
 obj-$(CONFIG_INPUT_POWERMATE)		+= powermate.o
 obj-$(CONFIG_INPUT_PWM_BEEPER)		+= pwm-beeper.o
 obj-$(CONFIG_INPUT_PWM_VIBRA)		+= pwm-vibra.o
+obj-$(CONFIG_INPUT_QCOM_SPMI_HAPTICS)	+= qcom-spmi-haptics.o
 obj-$(CONFIG_INPUT_RAVE_SP_PWRBUTTON)	+= rave-sp-pwrbutton.o
 obj-$(CONFIG_INPUT_RB532_BUTTON)	+= rb532_button.o
 obj-$(CONFIG_INPUT_REGULATOR_HAPTIC)	+= regulator-haptic.o
diff --git a/drivers/input/misc/qcom-spmi-haptics.c b/drivers/input/misc/qcom-spmi-haptics.c
new file mode 100644
index 000000000000..aad8a0be6792
--- /dev/null
+++ b/drivers/input/misc/qcom-spmi-haptics.c
@@ -0,0 +1,981 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2021, Caleb Connolly <caleb@connolly.tech>
+ * Qualcomm QPMI haptics driver for pmi8998 and related PMICs.
+ */
+
+#include <dt-bindings/input/qcom,spmi-haptics.h>
+
+#include <linux/atomic.h>
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/log2.h>
+#include <linux/minmax.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/types.h>
+
+
+#define HAP_STATUS_1_REG		0x0A
+#define HAP_BUSY_BIT			BIT(1)
+#define SC_FLAG_BIT			BIT(3)
+#define AUTO_RES_ERROR_BIT		BIT(4)
+
+#define HAP_LRA_AUTO_RES_LO_REG		0x0B
+#define HAP_LRA_AUTO_RES_HI_REG		0x0C
+
+#define HAP_EN_CTL_REG			0x46
+#define HAP_EN_BIT			BIT(7)
+
+#define HAP_EN_CTL2_REG			0x48
+#define BRAKE_EN_BIT			BIT(0)
+
+#define HAP_AUTO_RES_CTRL_REG		0x4B
+#define AUTO_RES_EN_BIT			BIT(7)
+#define AUTO_RES_ERR_RECOVERY_BIT	BIT(3)
+#define AUTO_RES_EN_FLAG_BIT		BIT(0)
+
+#define HAP_CFG1_REG			0x4C
+#define HAP_ACT_TYPE_MASK		BIT(0)
+
+#define HAP_CFG2_REG			0x4D
+#define HAP_LRA_RES_TYPE_MASK		BIT(0)
+
+#define HAP_SEL_REG			0x4E
+#define HAP_WF_SOURCE_MASK		GENMASK(5, 4)
+#define HAP_WF_SOURCE_SHIFT		4
+
+#define HAP_LRA_AUTO_RES_REG		0x4F
+#define LRA_AUTO_RES_MODE_MASK		GENMASK(6, 4)
+#define LRA_AUTO_RES_MODE_SHIFT		4
+#define LRA_HIGH_Z_MASK			GENMASK(3, 2)
+#define LRA_HIGH_Z_SHIFT		2
+#define LRA_RES_CAL_MASK		GENMASK(1, 0)
+#define HAP_RES_CAL_PERIOD_MIN		4
+#define HAP_RES_CAL_PERIOD_MAX		32
+
+#define HAP_VMAX_CFG_REG			0x51
+#define HAP_VMAX_OVD_BIT		BIT(6)
+#define HAP_VMAX_MASK			GENMASK(5, 1)
+#define HAP_VMAX_SHIFT			1
+
+#define HAP_ILIM_CFG_REG			0x52
+#define HAP_ILIM_SEL_MASK		BIT(0)
+#define HAP_ILIM_400_MA			0
+#define HAP_ILIM_800_MA			1
+
+#define HAP_SC_DEB_REG			0x53
+#define HAP_SC_DEB_MASK			GENMASK(2, 0)
+#define HAP_SC_DEB_CYCLES_MIN		0
+#define HAP_DEF_SC_DEB_CYCLES		8
+#define HAP_SC_DEB_CYCLES_MAX		32
+
+#define HAP_RATE_CFG1_REG		0x54
+#define HAP_RATE_CFG1_MASK		GENMASK(7, 0)
+#define HAP_RATE_CFG2_SHIFT		8 // As CFG2 is the most significant byte
+
+#define HAP_RATE_CFG2_REG		0x55
+#define HAP_RATE_CFG2_MASK		GENMASK(3, 0)
+
+#define HAP_SC_CLR_REG			0x59
+#define SC_CLR_BIT			BIT(0)
+
+#define HAP_BRAKE_REG			0x5C
+#define HAP_BRAKE_PAT_MASK		0x3
+
+#define HAP_WF_REPEAT_REG			0x5E
+#define WF_REPEAT_MASK			GENMASK(6, 4)
+#define WF_REPEAT_SHIFT			4
+#define WF_REPEAT_MIN			1
+#define WF_REPEAT_MAX			128
+#define WF_S_REPEAT_MASK		GENMASK(1, 0)
+#define WF_S_REPEAT_MIN			1
+#define WF_S_REPEAT_MAX			8
+
+#define HAP_WF_S1_REG			0x60
+#define HAP_WF_SIGN_BIT			BIT(7)
+#define HAP_WF_OVD_BIT			BIT(6)
+#define HAP_WF_SAMP_MAX			GENMASK(5, 1)
+#define HAP_WF_SAMPLE_LEN		8
+
+#define HAP_PLAY_REG			0x70
+#define HAP_PLAY_BIT			BIT(7)
+#define HAP_PAUSE_BIT			BIT(0)
+
+#define HAP_SEC_ACCESS_REG		0xD0
+#define HAP_SEC_ACCESS_UNLOCK		0xA5
+
+#define HAP_TEST2_REG			0xE3
+
+
+#define HAP_VMAX_MIN_MV			116
+#define HAP_VMAX_MAX_MV			3596
+#define HAP_VMAX_MAX_MV_STRONG		3596
+
+#define HAP_WAVE_PLAY_RATE_MIN_US	0
+#define HAP_WAVE_PLAY_RATE_MAX_US	20475
+#define HAP_WAVE_PLAY_TIME_MAX_MS	15000
+
+#define AUTO_RES_ERR_POLL_TIME_NS	(20 * NSEC_PER_MSEC)
+#define HAPTICS_BACK_EMF_DELAY_US	20000
+
+#define HAP_BRAKE_PAT_LEN		4
+#define HAP_WAVE_SAMP_LEN		8
+#define NUM_WF_SET			4
+#define HAP_WAVE_SAMP_SET_LEN		(HAP_WAVE_SAMP_LEN * NUM_WF_SET)
+#define HAP_RATE_CFG_STEP_US		5
+
+#define SC_MAX_COUNT			5
+#define SC_COUNT_RST_DELAY_US		1000000
+
+enum hap_play_control {
+	HAP_STOP,
+	HAP_PAUSE,
+	HAP_PLAY,
+};
+
+/**
+ * struct spmi_haptics - struct for spmi haptics data.
+ *
+ * @dev: Our device parent.
+ * @regmap: Register map for the hardware block.
+ * @input_dev: The input device used to receive events.
+ * @work: Work struct to play effects.
+ * @base: Base address of the regmap.
+ * @active: Atomic value used to track if haptics are currently playing.
+ * @play_irq: Fired to load the next wave pattern.
+ * @sc_irq: Short circuit irq.
+ * @last_sc_time: Time since the short circuit IRQ last fired.
+ * @sc_count: Number of times the short circuit IRQ has fired in this interval.
+ * @actuator_type: The type of actuator in use.
+ * @wave_shape: The shape of the waves to use (sine or square).
+ * @play_mode: The play mode to use (direct, buffer, pwm, audio).
+ * @magnitude: The strength we should be playing at.
+ * @vmax: Max voltage to use when playing.
+ * @current_limit: The current limit for this hardware (400mA or 800mA).
+ * @play_wave_rate: The wave rate to use for this hardware.
+ * @wave_samp: The array of wave samples to write for buffer mode.
+ * @brake_pat: The pattern to apply when braking.
+ * @play_lock: Lock to be held when updating the hardware state.
+ */
+struct spmi_haptics {
+	struct device *dev;
+	struct regmap *regmap;
+	struct input_dev *haptics_input_dev;
+	struct work_struct work;
+	u32 base;
+
+	atomic_t active;
+
+	int play_irq;
+	int sc_irq;
+	ktime_t last_sc_time;
+	u8 sc_count;
+
+	u8 actuator_type;
+	u8 wave_shape;
+	u8 play_mode;
+	int magnitude;
+	u32 vmax;
+	u32 current_limit;
+	u32 play_wave_rate;
+
+	u32 wave_samp[HAP_WAVE_SAMP_SET_LEN];
+	u8 brake_pat[HAP_BRAKE_PAT_LEN];
+
+	struct mutex play_lock;
+};
+
+static inline bool is_secure_addr(u16 addr)
+{
+	return (addr & 0xFF) > 0xD0;
+}
+
+static int spmi_haptics_read(struct spmi_haptics *haptics,
+	u16 addr, u8 *val, int len)
+{
+	int ret;
+
+	ret = regmap_bulk_read(haptics->regmap, addr, val, len);
+	if (ret < 0)
+		dev_err(haptics->dev, "Error reading address: 0x%x, ret %d\n", addr, ret);
+
+	return ret;
+}
+
+static int spmi_haptics_write(struct spmi_haptics *haptics,
+			      u16 addr, u8 *val, int len)
+{
+	int ret, i;
+
+	if (is_secure_addr(addr)) {
+		for (i = 0; i < len; i++) {
+			dev_dbg(haptics->dev, "%s: unlocking for addr: 0x%x, val: 0x%x", __func__,
+				addr, val[i]);
+			ret = regmap_write(haptics->regmap,
+				haptics->base + HAP_SEC_ACCESS_REG, HAP_SEC_ACCESS_UNLOCK);
+			if (ret < 0) {
+				dev_err(haptics->dev, "Error writing unlock code, ret %d\n",
+					ret);
+				return ret;
+			}
+
+			ret = regmap_write(haptics->regmap, addr + i, val[i]);
+			if (ret < 0) {
+				dev_err(haptics->dev, "Error writing address 0x%x, ret %d\n",
+					addr + i, ret);
+				return ret;
+			}
+		}
+	} else {
+		if (len > 1)
+			ret = regmap_bulk_write(haptics->regmap, addr, val, len);
+		else
+			ret = regmap_write(haptics->regmap, addr, *val);
+	}
+
+	if (ret < 0)
+		dev_err(haptics->dev, "%s: Error writing address: 0x%x, ret %d\n",
+			__func__, addr, ret);
+
+	return ret;
+}
+
+static int spmi_haptics_write_masked(struct spmi_haptics *haptics,
+	u16 addr, u8 mask, u8 val)
+{
+	int ret;
+
+	if (is_secure_addr(addr)) {
+		ret = regmap_write(haptics->regmap,
+			haptics->base + HAP_SEC_ACCESS_REG, HAP_SEC_ACCESS_UNLOCK);
+		if (ret < 0) {
+			dev_err(haptics->dev, "Error writing unlock code - ret %d\n", ret);
+			return ret;
+		}
+	}
+
+	ret = regmap_update_bits(haptics->regmap, addr, mask, val);
+	if (ret < 0)
+		dev_err(haptics->dev, "Error writing address: 0x%x - ret %d\n", addr, ret);
+
+	return ret;
+}
+
+static bool is_haptics_idle(struct spmi_haptics *haptics)
+{
+	int ret;
+	u8 val;
+
+	if (haptics->play_mode == HAP_PLAY_DIRECT ||
+			haptics->play_mode == HAP_PLAY_PWM)
+		return true;
+
+	ret = spmi_haptics_read(haptics, haptics->base + HAP_STATUS_1_REG, &val, 1);
+	if (ret < 0 || (val & HAP_BUSY_BIT))
+		return false;
+
+	return true;
+}
+
+static int spmi_haptics_module_enable(struct spmi_haptics *haptics, bool enable)
+{
+	u8 val;
+
+	dev_dbg(haptics->dev, "Setting module enable: %d", enable);
+
+	val = enable ? HAP_EN_BIT : 0;
+	return spmi_haptics_write(haptics, haptics->base + HAP_EN_CTL_REG, &val, 1);
+}
+
+static int spmi_haptics_write_vmax(struct spmi_haptics *haptics)
+{
+	u8 val = 0;
+	u32 vmax_mv = haptics->vmax;
+
+	vmax_mv = clamp_t(u32, vmax_mv, HAP_VMAX_MIN_MV, HAP_VMAX_MAX_MV);
+
+	dev_dbg(haptics->dev, "Setting vmax to: %d", vmax_mv);
+
+	val = DIV_ROUND_CLOSEST(vmax_mv, HAP_VMAX_MIN_MV);
+	val = FIELD_PREP(HAP_VMAX_MASK, val);
+
+	// TODO: pm660 can enable overdrive here
+
+	return spmi_haptics_write_masked(haptics, haptics->base + HAP_VMAX_CFG_REG,
+					 HAP_VMAX_MASK | HAP_WF_OVD_BIT, val);
+}
+
+static int spmi_haptics_write_current_limit(struct spmi_haptics *haptics)
+{
+	haptics->current_limit = clamp_t(u32, haptics->current_limit,
+					 HAP_ILIM_400_MA, HAP_ILIM_800_MA);
+
+	dev_dbg(haptics->dev, "Setting current_limit to: 0x%x", haptics->current_limit);
+
+	return spmi_haptics_write_masked(haptics, haptics->base + HAP_ILIM_CFG_REG,
+			HAP_ILIM_SEL_MASK, haptics->current_limit);
+}
+
+static int spmi_haptics_write_play_mode(struct spmi_haptics *haptics)
+{
+	u8 val = 0;
+
+	if (!is_haptics_idle(haptics))
+		return -EBUSY;
+
+	dev_dbg(haptics->dev, "Setting play_mode to: 0x%x", haptics->play_mode);
+
+	val = FIELD_PREP(HAP_WF_SOURCE_MASK, haptics->play_mode);
+	return spmi_haptics_write_masked(haptics, haptics->base + HAP_SEL_REG,
+					 HAP_WF_SOURCE_MASK, val);
+
+}
+
+static int spmi_haptics_write_play_rate(struct spmi_haptics *haptics, u16 play_rate)
+{
+	u8 val[2];
+
+	dev_dbg(haptics->dev, "Setting play_rate to: %d", play_rate);
+
+	val[0] = FIELD_PREP(HAP_RATE_CFG1_MASK, play_rate);
+	val[1] = FIELD_PREP(HAP_RATE_CFG2_MASK, play_rate >> HAP_RATE_CFG2_SHIFT);
+	return spmi_haptics_write(haptics, haptics->base + HAP_RATE_CFG1_REG, val, 2);
+}
+
+/*
+ * spmi_haptics_set_auto_res() - Auto resonance
+ * allows the haptics to automatically adjust the
+ * speed of the oscillation in order to maintain
+ * the resonant frequency.
+ */
+static int spmi_haptics_set_auto_res(struct spmi_haptics *haptics, bool enable)
+{
+	u8 val;
+
+	// LRAs are the only type to support auto res
+	if (haptics->actuator_type != HAP_TYPE_LRA)
+		return 0;
+
+	val = enable ? AUTO_RES_EN_BIT : 0;
+
+	return spmi_haptics_write_masked(haptics, haptics->base + HAP_TEST2_REG,
+				       AUTO_RES_EN_BIT, val);
+}
+
+static int spmi_haptics_write_brake(struct spmi_haptics *haptics)
+{
+	int ret, i;
+	u8 val;
+
+	dev_dbg(haptics->dev, "Configuring brake pattern");
+
+	ret = spmi_haptics_write_masked(haptics, haptics->base + HAP_EN_CTL2_REG,
+					BRAKE_EN_BIT, 1);
+	if (ret < 0)
+		return ret;
+
+	for (i = HAP_BRAKE_PAT_LEN - 1, val = 0; i >= 0; i--) {
+		u8 p = haptics->brake_pat[i] & HAP_BRAKE_PAT_MASK;
+
+		val |= p << (i * 2);
+	}
+
+	return spmi_haptics_write(haptics, haptics->base + HAP_BRAKE_REG, &val, 1);
+}
+
+static int spmi_haptics_write_buffer_config(struct spmi_haptics *haptics)
+{
+	u8 buf[HAP_WAVE_SAMP_LEN];
+	int i;
+
+	dev_dbg(haptics->dev, "Writing buffer config");
+
+	for (i = 0; i < HAP_WAVE_SAMP_LEN; i++)
+		buf[i] = haptics->wave_samp[i];
+
+	return spmi_haptics_write(haptics, haptics->base + HAP_WF_S1_REG, buf,
+				  HAP_WAVE_SAMP_LEN);
+}
+
+/*
+ * spmi_haptics_write_wave_repeat() - write wave repeat values.
+ */
+static int spmi_haptics_write_wave_repeat(struct spmi_haptics *haptics)
+{
+	u8 val, mask;
+
+	/* The number of times to repeat each wave */
+	mask = WF_REPEAT_MASK | WF_S_REPEAT_MASK;
+	val = FIELD_PREP(WF_REPEAT_MASK, 0) |
+	      FIELD_PREP(WF_S_REPEAT_MASK, 0);
+
+	return spmi_haptics_write_masked(haptics, haptics->base + HAP_WF_REPEAT_REG,
+					 mask, val);
+}
+
+static int spmi_haptics_write_play_control(struct spmi_haptics *haptics,
+						enum hap_play_control ctrl)
+{
+	u8 val;
+
+	switch (ctrl) {
+	case HAP_STOP:
+		val = 0;
+		break;
+	case HAP_PAUSE:
+		val = HAP_PAUSE_BIT;
+		break;
+	case HAP_PLAY:
+		val = HAP_PLAY_BIT;
+		break;
+	default:
+		return 0;
+	}
+
+	dev_dbg(haptics->dev, "haptics play ctrl: %d\n", ctrl);
+	return spmi_haptics_write(haptics, haptics->base + HAP_PLAY_REG, &val, 1);
+}
+
+/*
+ * This IRQ is fired to tell us to load the next wave sample set.
+ * As we only currently support a single sample set, it's unused.
+ */
+static irqreturn_t spmi_haptics_play_irq_handler(int irq, void *data)
+{
+	struct spmi_haptics *haptics = data;
+
+	dev_dbg(haptics->dev, "play_irq triggered");
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Fires every ~50ms whilst the haptics are active.
+ * If the SC_FLAG_BIT is set then that means there isn't a short circuit
+ * and we just need to clear the IRQ to indicate that the device should
+ * keep vibrating.
+ *
+ * Otherwise, it means a short circuit situation has occurred.
+ */
+static irqreturn_t spmi_haptics_sc_irq_handler(int irq, void *data)
+{
+	struct spmi_haptics *haptics = data;
+	int ret;
+	u8 val;
+	s64 sc_delta_time_us;
+	ktime_t temp;
+
+	ret = spmi_haptics_read(haptics, haptics->base + HAP_STATUS_1_REG, &val, 1);
+	if (ret < 0)
+		return IRQ_HANDLED;
+
+	if (!(val & SC_FLAG_BIT)) {
+		haptics->sc_count = 0;
+		return IRQ_HANDLED;
+	}
+
+	temp = ktime_get();
+	sc_delta_time_us = ktime_us_delta(temp, haptics->last_sc_time);
+	haptics->last_sc_time = temp;
+
+	if (sc_delta_time_us > SC_COUNT_RST_DELAY_US)
+		haptics->sc_count = 0;
+	else
+		haptics->sc_count++;
+
+	// Clear the interrupt flag
+	val = SC_CLR_BIT;
+	ret = spmi_haptics_write(haptics, haptics->base + HAP_SC_CLR_REG, &val, 1);
+	if (ret < 0)
+		return IRQ_HANDLED;
+
+	if (haptics->sc_count > SC_MAX_COUNT) {
+		dev_crit(haptics->dev, "Short circuit persists, disabling haptics\n");
+		ret = spmi_haptics_module_enable(haptics, false);
+		if (ret < 0)
+			dev_err(haptics->dev, "Error disabling module, rc=%d\n", ret);
+	}
+
+	return IRQ_HANDLED;
+}
+
+
+/**
+ * spmi_haptics_init() - Initialise haptics hardware for use
+ * @haptics: haptics device
+ * Returns: 0 on success, < 0 on error
+ */
+static int spmi_haptics_init(struct spmi_haptics *haptics)
+{
+	int ret;
+	u8 val, mask;
+	u16 play_rate;
+
+	ret = spmi_haptics_write_masked(haptics, haptics->base + HAP_CFG1_REG,
+		HAP_ACT_TYPE_MASK, haptics->actuator_type);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Configure auto resonance
+	 * see spmi_haptics_lra_auto_res_config downstream
+	 * This is greatly simplified.
+	 */
+	val = FIELD_PREP(LRA_RES_CAL_MASK, ilog2(32 / HAP_RES_CAL_PERIOD_MIN)) |
+	      FIELD_PREP(LRA_AUTO_RES_MODE_MASK, HAP_AUTO_RES_ZXD_EOP) |
+	      FIELD_PREP(LRA_HIGH_Z_MASK, 1);
+
+	mask = LRA_AUTO_RES_MODE_MASK | LRA_HIGH_Z_MASK | LRA_RES_CAL_MASK;
+
+	ret = spmi_haptics_write_masked(haptics, haptics->base + HAP_LRA_AUTO_RES_REG,
+			mask, val);
+
+	/* Configure the PLAY MODE register */
+	ret = spmi_haptics_write_play_mode(haptics);
+	if (ret < 0)
+		return ret;
+
+	ret = spmi_haptics_write_vmax(haptics);
+	if (ret < 0)
+		return ret;
+
+	/* Configure the ILIM register */
+	ret = spmi_haptics_write_current_limit(haptics);
+	if (ret < 0)
+		return ret;
+
+	// Configure the debounce for short-circuit detection.
+	ret = spmi_haptics_write_masked(haptics, haptics->base + HAP_SC_DEB_REG,
+			HAP_SC_DEB_MASK, HAP_SC_DEB_CYCLES_MAX);
+	if (ret < 0)
+		return ret;
+
+	// write the wave shape
+	ret = spmi_haptics_write_masked(haptics, haptics->base + HAP_CFG2_REG,
+			HAP_LRA_RES_TYPE_MASK, haptics->wave_shape);
+	if (ret < 0)
+		return ret;
+
+	play_rate = haptics->play_wave_rate / HAP_RATE_CFG_STEP_US;
+
+	/*
+	 * Configure RATE_CFG1 and RATE_CFG2 registers.
+	 * Note: For ERM these registers act as play rate and
+	 * for LRA these represent resonance period
+	 */
+	ret = spmi_haptics_write_play_rate(haptics, play_rate);
+	if (ret < 0)
+		return ret;
+
+	ret = spmi_haptics_write_brake(haptics);
+	if (ret < 0)
+		return ret;
+
+	if (haptics->play_mode == HAP_PLAY_BUFFER) {
+		ret = spmi_haptics_write_wave_repeat(haptics);
+		if (ret < 0)
+			return ret;
+
+		ret = spmi_haptics_write_buffer_config(haptics);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (haptics->play_irq >= 0) {
+		dev_dbg(haptics->dev, "%s: Requesting play IRQ, irq: %d", __func__,
+			haptics->play_irq);
+		ret = devm_request_threaded_irq(haptics->dev, haptics->play_irq,
+			NULL, spmi_haptics_play_irq_handler, IRQF_ONESHOT,
+			"haptics_play_irq", haptics);
+
+		if (ret < 0) {
+			dev_err(haptics->dev, "Unable to request play IRQ ret=%d\n", ret);
+			return ret;
+		}
+
+		/* use play_irq only for buffer mode */
+		if (haptics->play_mode != HAP_PLAY_BUFFER)
+			disable_irq(haptics->play_irq);
+	}
+
+	if (haptics->sc_irq >= 0) {
+		dev_dbg(haptics->dev, "%s: Requesting play IRQ, irq: %d", __func__,
+			haptics->play_irq);
+		ret = devm_request_threaded_irq(haptics->dev, haptics->sc_irq,
+			NULL, spmi_haptics_sc_irq_handler, IRQF_ONESHOT,
+			"haptics_sc_irq", haptics);
+
+		if (ret < 0) {
+			dev_err(haptics->dev, "Unable to request sc IRQ ret=%d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * spmi_haptics_enable - handler to start/stop vibration
+ * @haptics: pointer to haptics struct
+ * @enable: state to set
+ * Returns: 0 on success, < 0 on failure
+ */
+static int spmi_haptics_enable(struct spmi_haptics *haptics)
+{
+	int ret;
+
+	mutex_lock(&haptics->play_lock);
+	if (haptics->sc_count > SC_MAX_COUNT) {
+		dev_err(haptics->dev, "Can't play while in short circuit");
+		ret = -1;
+		goto out;
+	}
+	ret = spmi_haptics_set_auto_res(haptics, false);
+	if (ret < 0) {
+		dev_err(haptics->dev, "Error disabling auto_res, ret=%d\n", ret);
+		goto out;
+	}
+
+	ret = spmi_haptics_module_enable(haptics, true);
+	if (ret < 0) {
+		dev_err(haptics->dev, "Error enabling module, ret=%d\n", ret);
+		goto out;
+	}
+
+	ret = spmi_haptics_write_play_control(haptics, HAP_PLAY);
+	if (ret < 0) {
+		dev_err(haptics->dev, "Error enabling play, ret=%d\n", ret);
+		goto out;
+	}
+
+	ret = spmi_haptics_set_auto_res(haptics, true);
+	if (ret < 0) {
+		dev_err(haptics->dev, "Error enabling auto_res, ret=%d\n", ret);
+		goto out;
+	}
+
+out:
+	mutex_unlock(&haptics->play_lock);
+	return ret;
+}
+
+/**
+ * spmi_haptics_enable - handler to start/stop vibration
+ * @haptics: pointer to haptics struct
+ * @enable: state to set
+ * Returns: 0 on success, < 0 on failure
+ */
+static int spmi_haptics_disable(struct spmi_haptics *haptics)
+{
+	int ret;
+
+	mutex_lock(&haptics->play_lock);
+
+	ret = spmi_haptics_write_play_control(haptics, HAP_STOP);
+	if (ret < 0) {
+		dev_err(haptics->dev, "Error disabling play, ret=%d\n", ret);
+		goto out;
+	}
+
+	ret = spmi_haptics_module_enable(haptics, false);
+	if (ret < 0) {
+		dev_err(haptics->dev, "Error disabling module, ret=%d\n", ret);
+		goto out;
+	}
+
+out:
+	mutex_unlock(&haptics->play_lock);
+	return ret;
+}
+
+/*
+ * Threaded function to update the haptics state.
+ */
+static void spmi_haptics_work(struct work_struct *work)
+{
+	struct spmi_haptics *haptics = container_of(work, struct spmi_haptics, work);
+
+	int ret;
+	bool enable;
+
+	enable = atomic_read(&haptics->active);
+	dev_dbg(haptics->dev, "%s: state: %d\n", __func__, enable);
+
+	if (enable)
+		ret = spmi_haptics_enable(haptics);
+	else
+		ret = spmi_haptics_disable(haptics);
+	if (ret < 0)
+		dev_err(haptics->dev, "Error setting haptics, ret=%d", ret);
+}
+
+/**
+ * spmi_haptics_close - callback for input device close
+ * @dev: input device pointer
+ *
+ * Turns off the vibrator.
+ */
+static void spmi_haptics_close(struct input_dev *dev)
+{
+	struct spmi_haptics *haptics = input_get_drvdata(dev);
+
+	cancel_work_sync(&haptics->work);
+	if (atomic_read(&haptics->active)) {
+		atomic_set(&haptics->active, 0);
+		schedule_work(&haptics->work);
+	}
+}
+
+/**
+ * spmi_haptics_play_effect - play haptics effects
+ * @dev: input device pointer
+ * @data: data of effect
+ * @effect: effect to play
+ */
+static int spmi_haptics_play_effect(struct input_dev *dev, void *data,
+					struct ff_effect *effect)
+{
+	struct spmi_haptics *haptics = input_get_drvdata(dev);
+
+	dev_dbg(haptics->dev, "%s: Rumbling with strong: %d and weak: %d", __func__,
+		effect->u.rumble.strong_magnitude, effect->u.rumble.weak_magnitude);
+
+	haptics->magnitude = effect->u.rumble.strong_magnitude >> 8;
+	if (!haptics->magnitude)
+		haptics->magnitude = effect->u.rumble.weak_magnitude >> 10;
+
+	if (!haptics->magnitude) {
+		atomic_set(&haptics->active, 0);
+		goto end;
+	}
+
+	atomic_set(&haptics->active, 1);
+
+	haptics->vmax = ((HAP_VMAX_MAX_MV - HAP_VMAX_MIN_MV) * haptics->magnitude) / 100 +
+					HAP_VMAX_MIN_MV;
+
+	dev_dbg(haptics->dev, "%s: magnitude: %d, vmax: %d", __func__,
+		haptics->magnitude, haptics->vmax);
+
+	spmi_haptics_write_vmax(haptics);
+
+end:
+	schedule_work(&haptics->work);
+
+	return 0;
+}
+
+static int spmi_haptics_probe(struct platform_device *pdev)
+{
+	struct spmi_haptics *haptics;
+	struct device_node *node;
+	struct input_dev *input_dev;
+	int ret;
+	u32 val;
+	int i;
+
+	haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
+	if (!haptics)
+		return -ENOMEM;
+
+	haptics->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!haptics->regmap)
+		return -ENODEV;
+
+	node = pdev->dev.of_node;
+
+	haptics->dev = &pdev->dev;
+
+	ret = of_property_read_u32(node, "reg", &haptics->base);
+	if (ret < 0) {
+		dev_err(haptics->dev, "Couldn't find reg in node = %s ret = %d\n",
+			node->full_name, ret);
+		return ret;
+	}
+
+	haptics->play_irq = platform_get_irq_byname(pdev, "play");
+	if (haptics->play_irq < 0) {
+		dev_err(&pdev->dev, "Unable to get play irq\n");
+		ret = haptics->play_irq;
+		goto register_fail;
+	}
+
+	haptics->sc_irq = platform_get_irq_byname(pdev, "short");
+	if (haptics->sc_irq < 0) {
+		dev_err(&pdev->dev, "Unable to get sc irq\n");
+		ret = haptics->sc_irq;
+		goto register_fail;
+	}
+
+	// We only support LRAs for now
+	haptics->actuator_type = HAP_TYPE_LRA;
+	ret = of_property_read_u32(node, "qcom,actuator-type", &val);
+	if (!ret) {
+		if (val != HAP_TYPE_LRA) {
+			dev_err(&pdev->dev, "qcom,actuator-type (%d) isn't supported\n", val);
+			ret = -EINVAL;
+			goto register_fail;
+		}
+		haptics->actuator_type = val;
+	}
+
+	// Only buffer mode is currently supported
+	haptics->play_mode = HAP_PLAY_BUFFER;
+	ret = of_property_read_u32(node, "qcom,play-mode", &val);
+	if (!ret) {
+		if (val != HAP_PLAY_BUFFER) {
+			dev_err(&pdev->dev, "qcom,play-mode (%d) isn't supported\n", val);
+			ret = -EINVAL;
+			goto register_fail;
+		}
+		haptics->play_mode = val;
+	}
+
+	ret = of_property_read_u32(node, "qcom,wave-play-rate-us", &val);
+	if (!ret) {
+		haptics->play_wave_rate = val;
+	} else if (ret != -EINVAL) {
+		dev_err(haptics->dev, "Unable to read play rate ret=%d\n", ret);
+		goto register_fail;
+	}
+
+	haptics->play_wave_rate =
+		clamp_t(u32, haptics->play_wave_rate,
+			HAP_WAVE_PLAY_RATE_MIN_US, HAP_WAVE_PLAY_RATE_MAX_US);
+
+	haptics->wave_shape = HAP_WAVE_SINE;
+	ret = of_property_read_u32(node, "qcom,wave-shape", &val);
+	if (!ret) {
+		if (val != HAP_WAVE_SINE && val != HAP_WAVE_SQUARE) {
+			dev_err(&pdev->dev, "qcom,wave-shape is invalid: %d\n", val);
+			ret = -EINVAL;
+			goto register_fail;
+		}
+		haptics->wave_shape = val;
+	}
+
+	haptics->brake_pat[0] = 0x3;
+	haptics->brake_pat[1] = 0x3;
+	haptics->brake_pat[2] = 0x2;
+	haptics->brake_pat[3] = 0x1;
+
+	ret = of_property_read_u8_array(node, "qcom,brake-pattern", haptics->brake_pat, 4);
+	if (ret < 0 && ret != -EINVAL) {
+		dev_err(&pdev->dev, "qcom,brake-pattern is invalid, ret = %d\n", ret);
+		goto register_fail;
+	}
+
+	haptics->current_limit = HAP_ILIM_400_MA;
+
+	for (i = 0; i < HAP_WAVE_SAMP_LEN; i++)
+		haptics->wave_samp[i] = HAP_WF_SAMP_MAX;
+
+	ret = spmi_haptics_init(haptics);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Error initialising haptics, ret=%d\n",
+			ret);
+		goto register_fail;
+	}
+
+	platform_set_drvdata(pdev, haptics);
+
+	input_dev = devm_input_allocate_device(&pdev->dev);
+	if (!input_dev)
+		return -ENOMEM;
+
+	INIT_WORK(&haptics->work, spmi_haptics_work);
+	haptics->haptics_input_dev = input_dev;
+
+	input_dev->name = "spmi_haptics";
+	input_dev->id.version = 1;
+	input_dev->close = spmi_haptics_close;
+	input_set_drvdata(input_dev, haptics);
+	// Figure out how to make this FF_PERIODIC
+	input_set_capability(haptics->haptics_input_dev, EV_FF, FF_RUMBLE);
+
+	ret = input_ff_create_memless(input_dev, NULL,
+					spmi_haptics_play_effect);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"couldn't register vibrator as FF device\n");
+		goto register_fail;
+	}
+
+	ret = input_register_device(input_dev);
+	if (ret) {
+		dev_err(&pdev->dev, "couldn't register input device\n");
+		goto register_fail;
+	}
+
+	return 0;
+
+register_fail:
+	cancel_work_sync(&haptics->work);
+	mutex_destroy(&haptics->play_lock);
+
+	return ret;
+}
+
+static int __maybe_unused spmi_haptics_suspend(struct device *dev)
+{
+	struct spmi_haptics *haptics = dev_get_drvdata(dev);
+
+	cancel_work_sync(&haptics->work);
+	spmi_haptics_disable(haptics);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(spmi_haptics_pm_ops, spmi_haptics_suspend, NULL);
+
+static int spmi_haptics_remove(struct platform_device *pdev)
+{
+	struct spmi_haptics *haptics = dev_get_drvdata(&pdev->dev);
+
+	cancel_work_sync(&haptics->work);
+	mutex_destroy(&haptics->play_lock);
+	input_unregister_device(haptics->haptics_input_dev);
+
+	return 0;
+}
+
+static void spmi_haptics_shutdown(struct platform_device *pdev)
+{
+	struct spmi_haptics *haptics = dev_get_drvdata(&pdev->dev);
+
+	cancel_work_sync(&haptics->work);
+
+	spmi_haptics_disable(haptics);
+}
+
+static const struct of_device_id spmi_haptics_match_table[] = {
+	{ .compatible = "qcom,spmi-haptics" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, spmi_haptics_match_table);
+
+static struct platform_driver spmi_haptics_driver = {
+	.probe		= spmi_haptics_probe,
+	.remove		= spmi_haptics_remove,
+	.shutdown	= spmi_haptics_shutdown,
+	.driver		= {
+		.name	= "spmi-haptics",
+		.pm	= &spmi_haptics_pm_ops,
+		.of_match_table = spmi_haptics_match_table,
+	},
+};
+module_platform_driver(spmi_haptics_driver);
+
+MODULE_DESCRIPTION("spmi haptics driver using ff-memless framework");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Caleb Connolly <caleb@connolly.tech>");
--
2.32.0

[PATCH v3 3/6] arm64: dts: qcom: pmi8998: introduce spmi haptics

[Caleb Connolly]

Add bindings for Qualcomm SPMI haptics on platforms using pmi8998.

Signed-off-by: Caleb Connolly <caleb@connolly.tech>
---
 arch/arm64/boot/dts/qcom/pmi8998.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/pmi8998.dtsi b/arch/arm64/boot/dts/qcom/pmi8998.dtsi
index d230c510d4b7..5412cb3af0ae 100644
--- a/arch/arm64/boot/dts/qcom/pmi8998.dtsi
+++ b/arch/arm64/boot/dts/qcom/pmi8998.dtsi
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <dt-bindings/input/qcom,spmi-haptics.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/spmi/spmi.h>

@@ -41,5 +42,20 @@ lab: lab {
 				interrupt-names = "sc-err", "ocp";
 			};
 		};
+
+		pmi8998_haptics: haptics@c000 {
+			compatible = "qcom,pmi8998-haptics", "qcom,spmi-haptics";
+			reg = <0xc000>;
+
+			interrupts = <0x3 0xc0 0x0 IRQ_TYPE_EDGE_BOTH>,
+				     <0x3 0xc0 0x1 IRQ_TYPE_EDGE_BOTH>;
+			interrupt-names = "short", "play";
+
+			qcom,wave-shape = <HAP_WAVE_SINE>;
+			qcom,play-mode = <HAP_PLAY_BUFFER>;
+			qcom,brake-pattern = <0x3 0x3 0x2 0x1>;
+
+			status = "disabled";
+		};
 	};
 };
--
2.32.0

[PATCH v3 4/6] arm64: dts: qcom: sdm845-oneplus-common: add haptics

[Caleb Connolly]

Enable the pmi8998 SPMI haptics driver and configure the play rate for the
hardware.

Signed-off-by: Caleb Connolly <caleb@connolly.tech>
---
 arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
index 4d052e39b348..05e1f90c4f02 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
@@ -441,6 +441,12 @@ pinconf {
 	};
 };

+&pmi8998_haptics {
+	status = "okay";
+
+	qcom,wave-play-rate-us = <4255>;
+};
+
 &qupv3_id_1 {
 	status = "okay";
 };
--
2.32.0

[PATCH v3 5/6] arm64: dts: qcom: sdm845-xiaomi-beryllium: add haptics

[Caleb Connolly]

From: Joel Selvaraj <jo@jsfamily.in>

Enable the pmi8998 SPMI haptics driver and configure the play rate for the
hardware.

Signed-off-by: Joel Selvaraj <jo@jsfamily.in>
Signed-off-by: Caleb Connolly <caleb@connolly.tech>
---
 arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium.dts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium.dts b/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium.dts
index c60c8c640e17..b6ce5d0f4966 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium.dts
@@ -335,6 +335,11 @@ dai@2 {
 	};
 };

+&pmi8998_haptics {
+	status = "okay";
+	qcom,wave-play-rate-us = <4878>;
+};
+
 &qupv3_id_0 {
 	status = "okay";
 };
--
2.32.0

[PATCH v3 6/6] arm64: dts: qcom: msm8998-oneplus-common: Enable PMI8998 haptics

[Caleb Connolly]

From: Jami Kettunen <jami.kettunen@somainline.org>

The OnePlus 5 and 5T both have a haptics engine connected to PMI8998.

Signed-off-by: Jami Kettunen <jami.kettunen@somainline.org>
Signed-off-by: Caleb Connolly <caleb@connolly.tech>
---
 arch/arm64/boot/dts/qcom/msm8998-oneplus-common.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/msm8998-oneplus-common.dtsi b/arch/arm64/boot/dts/qcom/msm8998-oneplus-common.dtsi
index 0f5c7828a901..4494eb6794b4 100644
--- a/arch/arm64/boot/dts/qcom/msm8998-oneplus-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8998-oneplus-common.dtsi
@@ -257,6 +257,12 @@ pinconf {
 	};
 };

+&pmi8998_haptics {
+	status = "okay";
+
+	qcom,wave-play-rate-us = <4255>;
+};
+
 &qusb2phy {
 	status = "okay";

--
2.32.0

Re: [PATCH v3 2/6] input: add Qualcomm SPMI haptics driver

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 2997 bytes --]

Hi Caleb,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on input/next v5.14-rc6 next-20210816]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Caleb-Connolly/input-Introduce-support-for-SPMI-haptics-found-on-Qcom-PMICs/20210817-062200
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/4fe3986969c516117a071eb5f9df141c6fc95b69
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Caleb-Connolly/input-Introduce-support-for-SPMI-haptics-found-on-Qcom-PMICs/20210817-062200
        git checkout 4fe3986969c516117a071eb5f9df141c6fc95b69
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/input/misc/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/input/misc/qcom-spmi-haptics.c:196: warning: Function parameter or member 'haptics_input_dev' not described in 'spmi_haptics'
   drivers/input/misc/qcom-spmi-haptics.c:634: warning: Excess function parameter 'enable' description in 'spmi_haptics_enable'
>> drivers/input/misc/qcom-spmi-haptics.c:679: warning: expecting prototype for spmi_haptics_enable(). Prototype was for spmi_haptics_disable() instead


vim +679 drivers/input/misc/qcom-spmi-haptics.c

   671	
   672	/**
   673	 * spmi_haptics_enable - handler to start/stop vibration
   674	 * @haptics: pointer to haptics struct
   675	 * @enable: state to set
   676	 * Returns: 0 on success, < 0 on failure
   677	 */
   678	static int spmi_haptics_disable(struct spmi_haptics *haptics)
 > 679	{
   680		int ret;
   681	
   682		mutex_lock(&haptics->play_lock);
   683	
   684		ret = spmi_haptics_write_play_control(haptics, HAP_STOP);
   685		if (ret < 0) {
   686			dev_err(haptics->dev, "Error disabling play, ret=%d\n", ret);
   687			goto out;
   688		}
   689	
   690		ret = spmi_haptics_module_enable(haptics, false);
   691		if (ret < 0) {
   692			dev_err(haptics->dev, "Error disabling module, ret=%d\n", ret);
   693			goto out;
   694		}
   695	
   696	out:
   697		mutex_unlock(&haptics->play_lock);
   698		return ret;
   699	}
   700	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 77944 bytes --]

Re: [PATCH v3 1/6] dt-bindings: input: add Qualcomm SPMI haptics driver

[Rob Herring]

On Mon, 16 Aug 2021 22:19:55 +0000, Caleb Connolly wrote:
> Add bindings for qcom PMIC SPMI haptics driver.
> 
> Signed-off-by: Caleb Connolly <caleb@connolly.tech>
> ---
>  .../bindings/input/qcom,spmi-haptics.yaml     | 128 ++++++++++++++++++
>  include/dt-bindings/input/qcom,spmi-haptics.h |  32 +++++
>  2 files changed, 160 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/input/qcom,spmi-haptics.yaml
>  create mode 100644 include/dt-bindings/input/qcom,spmi-haptics.h
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/input/qcom,spmi-haptics.example.dt.yaml:0:0: /example-0/pmic@3: failed to match any schema with compatible: ['qcom,pmi8998', 'qcom,spmi-pmic']
Documentation/devicetree/bindings/input/qcom,spmi-haptics.example.dt.yaml:0:0: /example-0/pmic@3: failed to match any schema with compatible: ['qcom,pmi8998', 'qcom,spmi-pmic']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1517351

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.