[PATCH 03/12] mfd: wcd9335: add wcd irq support

From: Srinivas Kandagatla
Date: Mon Jul 23 2018 - 11:58:25 EST

WCD9335 supports two lines of irqs INTR1 and INTR2.
Mutiple interrupts are muxed via these lines.
INTR1 consists of all possible interrupt sources like:
Ear OCP, HPH OCP, MBHC, MAD, VBAT, and SVA
INTR2 is a subset of first interrupt sources like MAD, VBAT, and SVA

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
drivers/mfd/Makefile | 2 +-
drivers/mfd/wcd9335-core.c | 9 ++
drivers/mfd/wcd9335-irq.c | 172 ++++++++++++++++++++++++++++++++++++
include/dt-bindings/mfd/wcd9335.h | 43 +++++++++
include/linux/mfd/wcd9335/wcd9335.h | 3 +
5 files changed, 228 insertions(+), 1 deletion(-)
create mode 100644 drivers/mfd/wcd9335-irq.c
create mode 100644 include/dt-bindings/mfd/wcd9335.h

diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index a4697370640b..210875afe78a 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -58,7 +58,7 @@ obj-$(CONFIG_MFD_ARIZONA) += cs47l24-tables.o
endif

obj-$(CONFIG_MFD_WCD9335) += wcd9335.o
-wcd9335-objs := wcd9335-core.o
+wcd9335-objs := wcd9335-core.o wcd9335-irq.o

obj-$(CONFIG_MFD_WM8400) += wm8400-core.o
wm831x-objs := wm831x-core.o wm831x-irq.o wm831x-otp.o
diff --git a/drivers/mfd/wcd9335-core.c b/drivers/mfd/wcd9335-core.c
index ccdd27c3a351..7d478d87e16f 100644
--- a/drivers/mfd/wcd9335-core.c
+++ b/drivers/mfd/wcd9335-core.c
@@ -244,12 +244,20 @@ static int wcd9335_slim_status(struct slim_device *sdev,
return ret;
}

+ wcd9335_irq_init(wcd);
wcd->slim_ifd = wcd->slim_ifd;

return mfd_add_devices(wcd->dev, 0, wcd9335_devices,
ARRAY_SIZE(wcd9335_devices), NULL, 0, NULL);
}

+static void wcd9335_slim_remove(struct slim_device *sdev)
+{
+ struct wcd9335 *wcd = dev_get_drvdata(&sdev->dev);
+
+ wcd9335_irq_exit(wcd);
+}
+
static const struct slim_device_id wcd9335_slim_id[] = {
{0x217, 0x1a0, 0x1, 0x0},
{}
@@ -260,6 +268,7 @@ static struct slim_driver wcd9335_slim_driver = {
.name = "wcd9335-slim",
},
.probe = wcd9335_slim_probe,
+ .remove = wcd9335_slim_remove,
.device_status = wcd9335_slim_status,
.id_table = wcd9335_slim_id,
};
diff --git a/drivers/mfd/wcd9335-irq.c b/drivers/mfd/wcd9335-irq.c
new file mode 100644
index 000000000000..84098c89419b
--- /dev/null
+++ b/drivers/mfd/wcd9335-irq.c
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2018, Linaro Limited
+//
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/regmap.h>
+#include <linux/of_irq.h>
+#include <dt-bindings/mfd/wcd9335.h>
+#include <linux/mfd/wcd9335/wcd9335.h>
+#include <linux/mfd/wcd9335/registers.h>
+
+static const struct regmap_irq wcd9335_irqs[] = {
+ /* INTR_REG 0 */
+ [WCD9335_IRQ_SLIMBUS] = {
+ .reg_offset = 0,
+ .mask = BIT(0),
+ },
+ [WCD9335_IRQ_FLL_LOCK_LOSS] = {
+ .reg_offset = 0,
+ .mask = BIT(1),
+ },
+ [WCD9335_IRQ_HPH_PA_OCPL_FAULT] = {
+ .reg_offset = 0,
+ .mask = BIT(2),
+ },
+ [WCD9335_IRQ_HPH_PA_OCPR_FAULT] = {
+ .reg_offset = 0,
+ .mask = BIT(3),
+ },
+ [WCD9335_IRQ_EAR_PA_OCP_FAULT] = {
+ .reg_offset = 0,
+ .mask = BIT(4),
+ },
+ [WCD9335_IRQ_HPH_PA_CNPL_COMPLETE] = {
+ .reg_offset = 0,
+ .mask = BIT(5),
+ },
+ [WCD9335_IRQ_HPH_PA_CNPR_COMPLETE] = {
+ .reg_offset = 0,
+ .mask = BIT(6),
+ },
+ [WCD9335_IRQ_EAR_PA_CNP_COMPLETE] = {
+ .reg_offset = 0,
+ .mask = BIT(7),
+ },
+ /* INTR_REG 1 */
+ [WCD9335_IRQ_MBHC_SW_DET] = {
+ .reg_offset = 1,
+ .mask = BIT(0),
+ },
+ [WCD9335_IRQ_MBHC_ELECT_INS_REM_DET] = {
+ .reg_offset = 1,
+ .mask = BIT(1),
+ },
+ [WCD9335_IRQ_MBHC_BUTTON_PRESS_DET] = {
+ .reg_offset = 1,
+ .mask = BIT(2),
+ },
+ [WCD9335_IRQ_MBHC_BUTTON_RELEASE_DET] = {
+ .reg_offset = 1,
+ .mask = BIT(3),
+ },
+ [WCD9335_IRQ_MBHC_ELECT_INS_REM_LEG_DET] = {
+ .reg_offset = 1,
+ .mask = BIT(4),
+ },
+ /* INTR_REG 2 */
+ [WCD9335_IRQ_LINE_PA1_CNP_COMPLETE] = {
+ .reg_offset = 2,
+ .mask = BIT(0),
+ },
+ [WCD9335_IRQ_LINE_PA2_CNP_COMPLETE] = {
+ .reg_offset = 2,
+ .mask = BIT(1),
+ },
+ [WCD9335_IRQ_LINE_PA3_CNP_COMPLETE] = {
+ .reg_offset = 2,
+ .mask = BIT(2),
+ },
+ [WCD9335_IRQ_LINE_PA4_CNP_COMPLETE] = {
+ .reg_offset = 2,
+ .mask = BIT(3),
+ },
+ [WCD9335_IRQ_SOUNDWIRE] = {
+ .reg_offset = 2,
+ .mask = BIT(4),
+ },
+ [WCD9335_IRQ_VDD_DIG_RAMP_COMPLETE] = {
+ .reg_offset = 2,
+ .mask = BIT(5),
+ },
+ [WCD9335_IRQ_RCO_ERROR] = {
+ .reg_offset = 2,
+ .mask = BIT(6),
+ },
+ [WCD9335_IRQ_SVA_ERROR] = {
+ .reg_offset = 2,
+ .mask = BIT(7),
+ },
+ /* INTR_REG 3 */
+ [WCD9335_IRQ_MAD_AUDIO] = {
+ .reg_offset = 3,
+ .mask = BIT(0),
+ },
+ [WCD9335_IRQ_MAD_BEACON] = {
+ .reg_offset = 3,
+ .mask = BIT(1),
+ },
+ [WCD9335_IRQ_MAD_ULTRASOUND] = {
+ .reg_offset = 3,
+ .mask = BIT(2),
+ },
+ [WCD9335_IRQ_VBAT_ATTACK] = {
+ .reg_offset = 3,
+ .mask = BIT(3),
+ },
+ [WCD9335_IRQ_VBAT_RESTORE] = {
+ .reg_offset = 3,
+ .mask = BIT(4),
+ },
+ [WCD9335_IRQ_SVA_OUTBOX1] = {
+ .reg_offset = 3,
+ .mask = BIT(5),
+ },
+ [WCD9335_IRQ_SVA_OUTBOX2] = {
+ .reg_offset = 3,
+ .mask = BIT(6),
+ },
+};
+
+static const struct regmap_irq_chip wcd9335_regmap_irq1_chip = {
+ .name = "wcd9335_pin1_irq",
+ .status_base = WCD9335_INTR_PIN1_STATUS0,
+ .mask_base = WCD9335_INTR_PIN1_MASK0,
+ .ack_base = WCD9335_INTR_PIN1_CLEAR0,
+ .type_base = WCD9335_INTR_LEVEL0,
+ .num_regs = 4,
+ .irqs = wcd9335_irqs,
+ .num_irqs = ARRAY_SIZE(wcd9335_irqs),
+};
+
+int wcd9335_irq_init(struct wcd9335 *wcd)
+{
+ int ret;
+ /*
+ * INTR1 consists of all possible interrupt sources Ear OCP,
+ * HPH OCP, MBHC, MAD, VBAT, and SVA
+ * INTR2 is a subset of first interrupt sources MAD, VBAT, and SVA
+ */
+ wcd->intr1 = of_irq_get_byname(wcd->dev->of_node, "intr1");
+ if (wcd->intr1 < 0 || wcd->intr1 == -EPROBE_DEFER) {
+ dev_err(wcd->dev, "Unable to configure irq\n");
+ return wcd->intr1;
+ }
+
+ ret = regmap_add_irq_chip(wcd->regmap, wcd->intr1,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+ 0, &wcd9335_regmap_irq1_chip,
+ &wcd->irq_data);
+ if (ret != 0) {
+ dev_err(wcd->dev, "Failed to register IRQ chip: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+int wcd9335_irq_exit(struct wcd9335 *wcd)
+{
+ regmap_del_irq_chip(wcd->intr1, wcd->irq_data);
+ return 0;
+}
diff --git a/include/dt-bindings/mfd/wcd9335.h b/include/dt-bindings/mfd/wcd9335.h
new file mode 100644
index 000000000000..17f985be8f52
--- /dev/null
+++ b/include/dt-bindings/mfd/wcd9335.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This header provides macros for WCD9335 device bindings.
+ *
+ * Copyright (c) 2018, Linaro Limited
+ */
+
+#ifndef _DT_BINDINGS_MFD_WCD9335_H
+#define _DT_BINDINGS_MFD_WCD9335_H
+
+#define WCD9335_IRQ_SLIMBUS 1
+#define WCD9335_IRQ_FLL_LOCK_LOSS 2
+#define WCD9335_IRQ_HPH_PA_OCPL_FAULT 3
+#define WCD9335_IRQ_HPH_PA_OCPR_FAULT 4
+#define WCD9335_IRQ_EAR_PA_OCP_FAULT 5
+#define WCD9335_IRQ_HPH_PA_CNPL_COMPLETE 6
+#define WCD9335_IRQ_HPH_PA_CNPR_COMPLETE 7
+#define WCD9335_IRQ_EAR_PA_CNP_COMPLETE 8
+#define WCD9335_IRQ_MBHC_SW_DET 9
+#define WCD9335_IRQ_MBHC_ELECT_INS_REM_DET 10
+#define WCD9335_IRQ_MBHC_BUTTON_PRESS_DET 11
+#define WCD9335_IRQ_MBHC_BUTTON_RELEASE_DET 12
+#define WCD9335_IRQ_MBHC_ELECT_INS_REM_LEG_DET 13
+#define WCD9335_IRQ_RESERVED_0 14
+#define WCD9335_IRQ_RESERVED_1 15
+#define WCD9335_IRQ_RESERVED_2 16
+#define WCD9335_IRQ_LINE_PA1_CNP_COMPLETE 17
+#define WCD9335_IRQ_LINE_PA2_CNP_COMPLETE 18
+#define WCD9335_IRQ_LINE_PA3_CNP_COMPLETE 19
+#define WCD9335_IRQ_LINE_PA4_CNP_COMPLETE 20
+#define WCD9335_IRQ_SOUNDWIRE 21
+#define WCD9335_IRQ_VDD_DIG_RAMP_COMPLETE 22
+#define WCD9335_IRQ_RCO_ERROR 23
+#define WCD9335_IRQ_SVA_ERROR 24
+#define WCD9335_IRQ_MAD_AUDIO 25
+#define WCD9335_IRQ_MAD_BEACON 26
+#define WCD9335_IRQ_MAD_ULTRASOUND 27
+#define WCD9335_IRQ_VBAT_ATTACK 28
+#define WCD9335_IRQ_VBAT_RESTORE 29
+#define WCD9335_IRQ_SVA_OUTBOX1 30
+#define WCD9335_IRQ_SVA_OUTBOX2 31
+
+#endif /* _DT_BINDINGS_MFD_WCD9335_H */
diff --git a/include/linux/mfd/wcd9335/wcd9335.h b/include/linux/mfd/wcd9335/wcd9335.h
index 6b7fa6a66d8f..ac0853625c72 100644
--- a/include/linux/mfd/wcd9335/wcd9335.h
+++ b/include/linux/mfd/wcd9335/wcd9335.h
@@ -37,4 +37,7 @@ struct wcd9335 {
struct regulator_bulk_data supplies[WCD9335_MAX_SUPPLY];
};

+extern int wcd9335_irq_init(struct wcd9335 *wcd);
+extern int wcd9335_irq_exit(struct wcd9335 *wcd);
+
#endif /* __WCD9335_H__ */
--
2.16.2