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Subject[PATCH v10 RESEND 3/9] mfd: madera: Add common support for Cirrus Logic Madera codecs
Date
This adds the generic core support for Cirrus Logic "Madera" class codecs.
These are complex audio codec SoCs with a variety of digital and analogue
I/O, onboard audio processing and DSPs, and other features.

These codecs are all based off a common set of hardware IP so can be
supported by a core of common code (with a few minor device-to-device
variations).

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Nikesh Oswal <Nikesh.Oswal@cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
Changes since v9:
- Moved a bit of reset GPIO fetching code from the probe to madera_get_reset_gpio().
- Added a few explanatory comments and edited some others to be clearer.
- Removed pointer to codec driver pdata substructure. We'll add this back when the
codec driver goes into the tree, then it can be a member instead of an unnecessary
pointer dereference.
- Removed the irqchip driver pdata substruct, it only contained a single unsigned int
for flags, so put this directly into the MFD pdata.
---
MAINTAINERS | 3 +
drivers/mfd/Kconfig | 29 ++
drivers/mfd/Makefile | 5 +
drivers/mfd/madera-core.c | 609 +++++++++++++++++++++++++++++++++++++++
drivers/mfd/madera-i2c.c | 140 +++++++++
drivers/mfd/madera-spi.c | 139 +++++++++
drivers/mfd/madera.h | 44 +++
include/linux/mfd/madera/core.h | 187 ++++++++++++
include/linux/mfd/madera/pdata.h | 59 ++++
9 files changed, 1215 insertions(+)
create mode 100644 drivers/mfd/madera-core.c
create mode 100644 drivers/mfd/madera-i2c.c
create mode 100644 drivers/mfd/madera-spi.c
create mode 100644 drivers/mfd/madera.h
create mode 100644 include/linux/mfd/madera/core.h
create mode 100644 include/linux/mfd/madera/pdata.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 5e9fb7c34d81..d2a2e30e3609 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3487,7 +3487,10 @@ L: patches@opensource.cirrus.com
T: git https://github.com/CirrusLogic/linux-drivers.git
W: https://github.com/CirrusLogic/linux-drivers/wiki
S: Supported
+F: Documentation/devicetree/bindings/mfd/madera.txt
F: include/linux/mfd/madera/*
+F: drivers/mfd/madera*
+F: drivers/mfd/cs47l*

CLEANCACHE API
M: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index b860eb5aa194..f5ca392f8bc2 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -232,6 +232,35 @@ config MFD_CROS_EC_CHARDEV
If you have a supported Chromebook, choose Y or M here.
The module will be called cros_ec_dev.

+config MFD_MADERA
+ tristate "Cirrus Logic Madera codecs"
+ select MFD_CORE
+ select REGMAP
+ select REGMAP_IRQ
+ select MADERA_IRQ
+ select PINCTRL
+ select PINCTRL_MADERA
+ help
+ Support for the Cirrus Logic Madera platform audio codecs
+
+config MFD_MADERA_I2C
+ tristate "Cirrus Logic Madera codecs with I2C"
+ depends on MFD_MADERA
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Support for the Cirrus Logic Madera platform audio SoC
+ core functionality controlled via I2C.
+
+config MFD_MADERA_SPI
+ tristate "Cirrus Logic Madera codecs with SPI"
+ depends on MFD_MADERA
+ depends on SPI_MASTER
+ select REGMAP_SPI
+ help
+ Support for the Cirrus Logic Madera platform audio SoC
+ core functionality controlled via SPI.
+
config MFD_ASIC3
bool "Compaq ASIC3"
depends on GPIOLIB && ARM
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index e9fd20dba18d..db9ee6d24d91 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -72,6 +72,11 @@ wm8994-objs := wm8994-core.o wm8994-irq.o wm8994-regmap.o
obj-$(CONFIG_MFD_WM8994) += wm8994.o
obj-$(CONFIG_MFD_WM97xx) += wm97xx-core.o

+madera-objs := madera-core.o
+obj-$(CONFIG_MFD_MADERA) += madera.o
+obj-$(CONFIG_MFD_MADERA_I2C) += madera-i2c.o
+obj-$(CONFIG_MFD_MADERA_SPI) += madera-spi.o
+
obj-$(CONFIG_TPS6105X) += tps6105x.o
obj-$(CONFIG_TPS65010) += tps65010.o
obj-$(CONFIG_TPS6507X) += tps6507x.o
diff --git a/drivers/mfd/madera-core.c b/drivers/mfd/madera-core.c
new file mode 100644
index 000000000000..8cfea969b060
--- /dev/null
+++ b/drivers/mfd/madera-core.c
@@ -0,0 +1,609 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Core MFD support for Cirrus Logic Madera codecs
+ *
+ * Copyright (C) 2015-2018 Cirrus Logic
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2.
+ */
+
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+
+#include <linux/mfd/madera/core.h>
+#include <linux/mfd/madera/registers.h>
+
+#include "madera.h"
+
+#define CS47L35_SILICON_ID 0x6360
+#define CS47L85_SILICON_ID 0x6338
+#define CS47L90_SILICON_ID 0x6364
+
+#define MADERA_32KZ_MCLK2 1
+
+static const char * const madera_core_supplies[] = {
+ "AVDD",
+ "DBVDD1",
+};
+
+static const struct mfd_cell madera_ldo1_devs[] = {
+ { .name = "madera-ldo1" },
+};
+
+static const char * const cs47l35_supplies[] = {
+ "MICVDD",
+ "DBVDD2",
+ "CPVDD1",
+ "CPVDD2",
+ "SPKVDD",
+};
+
+static const struct mfd_cell cs47l35_devs[] = {
+ { .name = "madera-pinctrl", },
+ { .name = "madera-irq", },
+ { .name = "madera-micsupp", },
+ { .name = "madera-gpio", },
+ { .name = "madera-extcon", },
+ {
+ .name = "cs47l35-codec",
+ .parent_supplies = cs47l35_supplies,
+ .num_parent_supplies = ARRAY_SIZE(cs47l35_supplies),
+ },
+};
+
+static const char * const cs47l85_supplies[] = {
+ "MICVDD",
+ "DBVDD2",
+ "DBVDD3",
+ "DBVDD4",
+ "CPVDD1",
+ "CPVDD2",
+ "SPKVDDL",
+ "SPKVDDR",
+};
+
+static const struct mfd_cell cs47l85_devs[] = {
+ { .name = "madera-pinctrl", },
+ { .name = "madera-irq", },
+ { .name = "madera-micsupp" },
+ { .name = "madera-gpio", },
+ { .name = "madera-extcon", },
+ {
+ .name = "cs47l85-codec",
+ .parent_supplies = cs47l85_supplies,
+ .num_parent_supplies = ARRAY_SIZE(cs47l85_supplies),
+ },
+};
+
+static const char * const cs47l90_supplies[] = {
+ "MICVDD",
+ "DBVDD2",
+ "DBVDD3",
+ "DBVDD4",
+ "CPVDD1",
+ "CPVDD2",
+};
+
+static const struct mfd_cell cs47l90_devs[] = {
+ { .name = "madera-pinctrl", },
+ { .name = "madera-irq", },
+ { .name = "madera-micsupp", },
+ { .name = "madera-gpio", },
+ { .name = "madera-extcon", },
+ {
+ .name = "cs47l90-codec",
+ .parent_supplies = cs47l90_supplies,
+ .num_parent_supplies = ARRAY_SIZE(cs47l90_supplies),
+ },
+};
+
+/* Used by madera-i2c and madera-spi drivers */
+const char *madera_name_from_type(enum madera_type type)
+{
+ switch (type) {
+ case CS47L35:
+ return "CS47L35";
+ case CS47L85:
+ return "CS47L85";
+ case CS47L90:
+ return "CS47L90";
+ case CS47L91:
+ return "CS47L91";
+ case WM1840:
+ return "WM1840";
+ default:
+ return "Unknown";
+ }
+}
+EXPORT_SYMBOL_GPL(madera_name_from_type);
+
+#define MADERA_BOOT_POLL_MAX_INTERVAL_US 5000
+#define MADERA_BOOT_POLL_TIMEOUT_US 25000
+
+static int madera_wait_for_boot(struct madera *madera)
+{
+ unsigned int val;
+ int ret;
+
+ /*
+ * We can't use an interrupt as we need to runtime resume to do so,
+ * so we poll the status bit. This won't race with the interrupt
+ * handler because it will be blocked on runtime resume.
+ */
+ ret = regmap_read_poll_timeout(madera->regmap,
+ MADERA_IRQ1_RAW_STATUS_1,
+ val,
+ (val & MADERA_BOOT_DONE_STS1),
+ MADERA_BOOT_POLL_MAX_INTERVAL_US,
+ MADERA_BOOT_POLL_TIMEOUT_US);
+
+ if (ret)
+ dev_err(madera->dev, "Polling BOOT_DONE_STS failed: %d\n", ret);
+
+ /*
+ * BOOT_DONE defaults to unmasked on boot so we must ack it.
+ * Do this unconditionally to avoid interrupt storms.
+ */
+ regmap_write(madera->regmap, MADERA_IRQ1_STATUS_1,
+ MADERA_BOOT_DONE_EINT1);
+
+ pm_runtime_mark_last_busy(madera->dev);
+
+ return ret;
+}
+
+static int madera_soft_reset(struct madera *madera)
+{
+ int ret;
+
+ ret = regmap_write(madera->regmap, MADERA_SOFTWARE_RESET, 0);
+ if (ret != 0) {
+ dev_err(madera->dev, "Failed to soft reset device: %d\n", ret);
+ return ret;
+ }
+
+ /* Allow time for internal clocks to startup after reset */
+ usleep_range(1000, 2000);
+
+ return 0;
+}
+
+static void madera_enable_hard_reset(struct madera *madera)
+{
+ if (!madera->pdata.reset)
+ return;
+
+ /*
+ * There are many existing out-of-tree users of these codecs that we
+ * can't break so preserve the expected behaviour of setting the line
+ * low to assert reset.
+ */
+ gpiod_set_raw_value_cansleep(madera->pdata.reset, 0);
+}
+
+static void madera_disable_hard_reset(struct madera *madera)
+{
+ if (!madera->pdata.reset)
+ return;
+
+ gpiod_set_raw_value_cansleep(madera->pdata.reset, 1);
+ usleep_range(1000, 2000);
+}
+
+static int __maybe_unused madera_runtime_resume(struct device *dev)
+{
+ struct madera *madera = dev_get_drvdata(dev);
+ int ret;
+
+ dev_dbg(dev, "Leaving sleep mode\n");
+
+ ret = regulator_enable(madera->dcvdd);
+ if (ret) {
+ dev_err(dev, "Failed to enable DCVDD: %d\n", ret);
+ return ret;
+ }
+
+ regcache_cache_only(madera->regmap, false);
+ regcache_cache_only(madera->regmap_32bit, false);
+
+ ret = madera_wait_for_boot(madera);
+ if (ret)
+ goto err;
+
+ ret = regcache_sync(madera->regmap);
+ if (ret) {
+ dev_err(dev, "Failed to restore 16-bit register cache\n");
+ goto err;
+ }
+
+ ret = regcache_sync(madera->regmap_32bit);
+ if (ret) {
+ dev_err(dev, "Failed to restore 32-bit register cache\n");
+ goto err;
+ }
+
+ return 0;
+
+err:
+ regcache_cache_only(madera->regmap_32bit, true);
+ regcache_cache_only(madera->regmap, true);
+ regulator_disable(madera->dcvdd);
+
+ return ret;
+}
+
+static int __maybe_unused madera_runtime_suspend(struct device *dev)
+{
+ struct madera *madera = dev_get_drvdata(dev);
+
+ dev_dbg(madera->dev, "Entering sleep mode\n");
+
+ regcache_cache_only(madera->regmap, true);
+ regcache_mark_dirty(madera->regmap);
+ regcache_cache_only(madera->regmap_32bit, true);
+ regcache_mark_dirty(madera->regmap_32bit);
+
+ regulator_disable(madera->dcvdd);
+
+ return 0;
+}
+
+const struct dev_pm_ops madera_pm_ops = {
+ SET_RUNTIME_PM_OPS(madera_runtime_suspend,
+ madera_runtime_resume,
+ NULL)
+};
+EXPORT_SYMBOL_GPL(madera_pm_ops);
+
+const struct of_device_id madera_of_match[] = {
+ { .compatible = "cirrus,cs47l35", .data = (void *)CS47L35 },
+ { .compatible = "cirrus,cs47l85", .data = (void *)CS47L85 },
+ { .compatible = "cirrus,cs47l90", .data = (void *)CS47L90 },
+ { .compatible = "cirrus,cs47l91", .data = (void *)CS47L91 },
+ { .compatible = "cirrus,wm1840", .data = (void *)WM1840 },
+ {}
+};
+EXPORT_SYMBOL_GPL(madera_of_match);
+
+static int madera_get_reset_gpio(struct madera *madera)
+{
+ struct gpio_desc *reset;
+ int ret;
+
+ if (madera->pdata.reset)
+ return 0;
+
+ reset = devm_gpiod_get_optional(madera->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(reset)) {
+ ret = PTR_ERR(reset);
+ if (ret != -EPROBE_DEFER)
+ dev_err(madera->dev, "Failed to request /RESET: %d\n",
+ ret);
+ return ret;
+ }
+
+ /*
+ * A hard reset is needed for full reset of the chip. We allow running
+ * without hard reset only because it can be useful for early
+ * prototyping and some debugging, but we need to warn it's not ideal.
+ */
+ if (!reset)
+ dev_warn(madera->dev,
+ "Running without reset GPIO is not recommended\n");
+
+ madera->pdata.reset = reset;
+
+ return 0;
+}
+
+static void madera_set_micbias_info(struct madera *madera)
+{
+ /*
+ * num_childbias is an array because future codecs can have different
+ * childbiases for each micbias. Unspecified values default to 0.
+ */
+ switch (madera->type) {
+ case CS47L35:
+ madera->num_micbias = 2;
+ madera->num_childbias[0] = 2;
+ madera->num_childbias[1] = 2;
+ return;
+ case CS47L85:
+ case WM1840:
+ madera->num_micbias = 4;
+ /* no child biases */
+ return;
+ case CS47L90:
+ case CS47L91:
+ madera->num_micbias = 2;
+ madera->num_childbias[0] = 4;
+ madera->num_childbias[1] = 4;
+ return;
+ default:
+ return;
+ }
+}
+
+int madera_dev_init(struct madera *madera)
+{
+ struct device *dev = madera->dev;
+ unsigned int hwid;
+ int (*patch_fn)(struct madera *) = NULL;
+ const struct mfd_cell *mfd_devs;
+ int n_devs = 0;
+ int i, ret;
+
+ dev_set_drvdata(madera->dev, madera);
+ BLOCKING_INIT_NOTIFIER_HEAD(&madera->notifier);
+ madera_set_micbias_info(madera);
+
+ /*
+ * We need writable hw config info that all children can share.
+ * Simplest to take one shared copy of pdata struct.
+ */
+ if (dev_get_platdata(madera->dev)) {
+ memcpy(&madera->pdata, dev_get_platdata(madera->dev),
+ sizeof(madera->pdata));
+ }
+
+ ret = madera_get_reset_gpio(madera);
+ if (ret)
+ return ret;
+
+ regcache_cache_only(madera->regmap, true);
+ regcache_cache_only(madera->regmap_32bit, true);
+
+ for (i = 0; i < ARRAY_SIZE(madera_core_supplies); i++)
+ madera->core_supplies[i].supply = madera_core_supplies[i];
+
+ madera->num_core_supplies = ARRAY_SIZE(madera_core_supplies);
+
+ /*
+ * On some codecs DCVDD could be supplied by the internal LDO1.
+ * For those we must add the LDO1 driver before requesting DCVDD
+ * No devm_ because we need to control shutdown order of children.
+ */
+ switch (madera->type) {
+ case CS47L35:
+ case CS47L90:
+ case CS47L91:
+ break;
+ case CS47L85:
+ case WM1840:
+ ret = mfd_add_devices(madera->dev, PLATFORM_DEVID_NONE,
+ madera_ldo1_devs,
+ ARRAY_SIZE(madera_ldo1_devs),
+ NULL, 0, NULL);
+ if (ret) {
+ dev_err(dev, "Failed to add LDO1 child: %d\n", ret);
+ return ret;
+ }
+ break;
+ default:
+ /* No point continuing if the type is unknown */
+ dev_err(madera->dev, "Unknown device type %d\n", madera->type);
+ return -ENODEV;
+ }
+
+ ret = devm_regulator_bulk_get(dev, madera->num_core_supplies,
+ madera->core_supplies);
+ if (ret) {
+ dev_err(dev, "Failed to request core supplies: %d\n", ret);
+ goto err_devs;
+ }
+
+ /*
+ * Don't use devres here. If the regulator is one of our children it
+ * will already have been removed before devres cleanup on this mfd
+ * driver tries to call put() on it. We need control of shutdown order.
+ */
+ madera->dcvdd = regulator_get(madera->dev, "DCVDD");
+ if (IS_ERR(madera->dcvdd)) {
+ ret = PTR_ERR(madera->dcvdd);
+ dev_err(dev, "Failed to request DCVDD: %d\n", ret);
+ goto err_devs;
+ }
+
+ ret = regulator_bulk_enable(madera->num_core_supplies,
+ madera->core_supplies);
+ if (ret) {
+ dev_err(dev, "Failed to enable core supplies: %d\n", ret);
+ goto err_dcvdd;
+ }
+
+ ret = regulator_enable(madera->dcvdd);
+ if (ret) {
+ dev_err(dev, "Failed to enable DCVDD: %d\n", ret);
+ goto err_enable;
+ }
+
+ madera_disable_hard_reset(madera);
+
+ regcache_cache_only(madera->regmap, false);
+ regcache_cache_only(madera->regmap_32bit, false);
+
+ /*
+ * Now we can power up and verify that this is a chip we know about
+ * before we start doing any writes to its registers.
+ */
+ ret = regmap_read(madera->regmap, MADERA_SOFTWARE_RESET, &hwid);
+ if (ret) {
+ dev_err(dev, "Failed to read ID register: %d\n", ret);
+ goto err_reset;
+ }
+
+ switch (hwid) {
+ case CS47L35_SILICON_ID:
+ if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
+ switch (madera->type) {
+ case CS47L35:
+ patch_fn = cs47l35_patch;
+ mfd_devs = cs47l35_devs;
+ n_devs = ARRAY_SIZE(cs47l35_devs);
+ break;
+ default:
+ break;
+ }
+ }
+ break;
+ case CS47L85_SILICON_ID:
+ if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
+ switch (madera->type) {
+ case CS47L85:
+ case WM1840:
+ patch_fn = cs47l85_patch;
+ mfd_devs = cs47l85_devs;
+ n_devs = ARRAY_SIZE(cs47l85_devs);
+ break;
+ default:
+ break;
+ }
+ }
+ break;
+ case CS47L90_SILICON_ID:
+ if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
+ switch (madera->type) {
+ case CS47L90:
+ case CS47L91:
+ patch_fn = cs47l90_patch;
+ mfd_devs = cs47l90_devs;
+ n_devs = ARRAY_SIZE(cs47l90_devs);
+ break;
+ default:
+ break;
+ }
+ }
+ break;
+ default:
+ dev_err(madera->dev, "Unknown device ID: %x\n", hwid);
+ ret = -EINVAL;
+ goto err_reset;
+ }
+
+ if (!n_devs) {
+ dev_err(madera->dev, "Device ID 0x%x not a %s\n", hwid,
+ madera->type_name);
+ ret = -ENODEV;
+ goto err_reset;
+ }
+
+ /*
+ * It looks like a device we support. If we don't have a hard reset
+ * we can now attempt a soft reset.
+ */
+ if (!madera->pdata.reset) {
+ ret = madera_soft_reset(madera);
+ if (ret)
+ goto err_reset;
+ }
+
+ ret = madera_wait_for_boot(madera);
+ if (ret) {
+ dev_err(madera->dev, "Device failed initial boot: %d\n", ret);
+ goto err_reset;
+ }
+
+ ret = regmap_read(madera->regmap, MADERA_HARDWARE_REVISION,
+ &madera->rev);
+ if (ret) {
+ dev_err(dev, "Failed to read revision register: %d\n", ret);
+ goto err_reset;
+ }
+ madera->rev &= MADERA_HW_REVISION_MASK;
+
+ dev_info(dev, "%s silicon revision %d\n", madera->type_name,
+ madera->rev);
+
+ /* Apply hardware patch */
+ if (patch_fn) {
+ ret = patch_fn(madera);
+ if (ret) {
+ dev_err(madera->dev, "Failed to apply patch %d\n", ret);
+ goto err_reset;
+ }
+ }
+
+ /* Init 32k clock sourced from MCLK2 */
+ ret = regmap_update_bits(madera->regmap,
+ MADERA_CLOCK_32K_1,
+ MADERA_CLK_32K_ENA_MASK | MADERA_CLK_32K_SRC_MASK,
+ MADERA_CLK_32K_ENA | MADERA_32KZ_MCLK2);
+ if (ret) {
+ dev_err(madera->dev, "Failed to init 32k clock: %d\n", ret);
+ goto err_reset;
+ }
+
+ pm_runtime_set_active(madera->dev);
+ pm_runtime_enable(madera->dev);
+ pm_runtime_set_autosuspend_delay(madera->dev, 100);
+ pm_runtime_use_autosuspend(madera->dev);
+
+ /* No devm_ because we need to control shutdown order of children */
+ ret = mfd_add_devices(madera->dev, PLATFORM_DEVID_NONE,
+ mfd_devs, n_devs,
+ NULL, 0, NULL);
+ if (ret) {
+ dev_err(madera->dev, "Failed to add subdevices: %d\n", ret);
+ goto err_pm_runtime;
+ }
+
+ return 0;
+
+err_pm_runtime:
+ pm_runtime_disable(madera->dev);
+err_reset:
+ madera_enable_hard_reset(madera);
+ regulator_disable(madera->dcvdd);
+err_enable:
+ regulator_bulk_disable(madera->num_core_supplies,
+ madera->core_supplies);
+err_dcvdd:
+ regulator_put(madera->dcvdd);
+err_devs:
+ mfd_remove_devices(dev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(madera_dev_init);
+
+int madera_dev_exit(struct madera *madera)
+{
+ /* Prevent any IRQs being serviced while we clean up */
+ disable_irq(madera->irq);
+
+ /*
+ * DCVDD could be supplied by a child node, we must disable it before
+ * removing the children, and prevent PM runtime from turning it back on
+ */
+ pm_runtime_disable(madera->dev);
+
+ regulator_disable(madera->dcvdd);
+ regulator_put(madera->dcvdd);
+
+ mfd_remove_devices(madera->dev);
+ madera_enable_hard_reset(madera);
+
+ regulator_bulk_disable(madera->num_core_supplies,
+ madera->core_supplies);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(madera_dev_exit);
+
+MODULE_DESCRIPTION("Madera core MFD driver");
+MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/madera-i2c.c b/drivers/mfd/madera-i2c.c
new file mode 100644
index 000000000000..05ae94be01d8
--- /dev/null
+++ b/drivers/mfd/madera-i2c.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * I2C bus interface to Cirrus Logic Madera codecs
+ *
+ * Copyright (C) 2015-2018 Cirrus Logic
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/madera/core.h>
+
+#include "madera.h"
+
+static int madera_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct madera *madera;
+ const struct regmap_config *regmap_16bit_config = NULL;
+ const struct regmap_config *regmap_32bit_config = NULL;
+ const void *of_data;
+ unsigned long type;
+ const char *name;
+ int ret;
+
+ of_data = of_device_get_match_data(&i2c->dev);
+ if (of_data)
+ type = (unsigned long)of_data;
+ else
+ type = id->driver_data;
+
+ switch (type) {
+ case CS47L35:
+ if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
+ regmap_16bit_config = &cs47l35_16bit_i2c_regmap;
+ regmap_32bit_config = &cs47l35_32bit_i2c_regmap;
+ }
+ break;
+ case CS47L85:
+ case WM1840:
+ if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
+ regmap_16bit_config = &cs47l85_16bit_i2c_regmap;
+ regmap_32bit_config = &cs47l85_32bit_i2c_regmap;
+ }
+ break;
+ case CS47L90:
+ case CS47L91:
+ if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
+ regmap_16bit_config = &cs47l90_16bit_i2c_regmap;
+ regmap_32bit_config = &cs47l90_32bit_i2c_regmap;
+ }
+ break;
+ default:
+ dev_err(&i2c->dev,
+ "Unknown Madera I2C device type %ld\n", type);
+ return -EINVAL;
+ }
+
+ name = madera_name_from_type(type);
+
+ if (!regmap_16bit_config) {
+ /* it's polite to say which codec isn't built into the kernel */
+ dev_err(&i2c->dev,
+ "Kernel does not include support for %s\n", name);
+ return -EINVAL;
+ }
+
+ madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL);
+ if (!madera)
+ return -ENOMEM;
+
+
+ madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config);
+ if (IS_ERR(madera->regmap)) {
+ ret = PTR_ERR(madera->regmap);
+ dev_err(&i2c->dev,
+ "Failed to allocate 16-bit register map: %d\n", ret);
+ return ret;
+ }
+
+ madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config);
+ if (IS_ERR(madera->regmap_32bit)) {
+ ret = PTR_ERR(madera->regmap_32bit);
+ dev_err(&i2c->dev,
+ "Failed to allocate 32-bit register map: %d\n", ret);
+ return ret;
+ }
+
+ madera->type = type;
+ madera->type_name = name;
+ madera->dev = &i2c->dev;
+ madera->irq = i2c->irq;
+
+ return madera_dev_init(madera);
+}
+
+static int madera_i2c_remove(struct i2c_client *i2c)
+{
+ struct madera *madera = dev_get_drvdata(&i2c->dev);
+
+ madera_dev_exit(madera);
+
+ return 0;
+}
+
+static const struct i2c_device_id madera_i2c_id[] = {
+ { "cs47l35", CS47L35 },
+ { "cs47l85", CS47L85 },
+ { "cs47l90", CS47L90 },
+ { "cs47l91", CS47L91 },
+ { "wm1840", WM1840 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, madera_i2c_id);
+
+static struct i2c_driver madera_i2c_driver = {
+ .driver = {
+ .name = "madera",
+ .pm = &madera_pm_ops,
+ .of_match_table = of_match_ptr(madera_of_match),
+ },
+ .probe = madera_i2c_probe,
+ .remove = madera_i2c_remove,
+ .id_table = madera_i2c_id,
+};
+
+module_i2c_driver(madera_i2c_driver);
+
+MODULE_DESCRIPTION("Madera I2C bus interface");
+MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/madera-spi.c b/drivers/mfd/madera-spi.c
new file mode 100644
index 000000000000..4c398b278bba
--- /dev/null
+++ b/drivers/mfd/madera-spi.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SPI bus interface to Cirrus Logic Madera codecs
+ *
+ * Copyright (C) 2015-2018 Cirrus Logic
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include <linux/mfd/madera/core.h>
+
+#include "madera.h"
+
+static int madera_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ struct madera *madera;
+ const struct regmap_config *regmap_16bit_config = NULL;
+ const struct regmap_config *regmap_32bit_config = NULL;
+ const void *of_data;
+ unsigned long type;
+ const char *name;
+ int ret;
+
+ of_data = of_device_get_match_data(&spi->dev);
+ if (of_data)
+ type = (unsigned long)of_data;
+ else
+ type = id->driver_data;
+
+ switch (type) {
+ case CS47L35:
+ if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
+ regmap_16bit_config = &cs47l35_16bit_spi_regmap;
+ regmap_32bit_config = &cs47l35_32bit_spi_regmap;
+ }
+ break;
+ case CS47L85:
+ case WM1840:
+ if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
+ regmap_16bit_config = &cs47l85_16bit_spi_regmap;
+ regmap_32bit_config = &cs47l85_32bit_spi_regmap;
+ }
+ break;
+ case CS47L90:
+ case CS47L91:
+ if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
+ regmap_16bit_config = &cs47l90_16bit_spi_regmap;
+ regmap_32bit_config = &cs47l90_32bit_spi_regmap;
+ }
+ break;
+ default:
+ dev_err(&spi->dev,
+ "Unknown Madera SPI device type %ld\n", type);
+ return -EINVAL;
+ }
+
+ name = madera_name_from_type(type);
+
+ if (!regmap_16bit_config) {
+ /* it's polite to say which codec isn't built into the kernel */
+ dev_err(&spi->dev,
+ "Kernel does not include support for %s\n", name);
+ return -EINVAL;
+ }
+
+ madera = devm_kzalloc(&spi->dev, sizeof(*madera), GFP_KERNEL);
+ if (!madera)
+ return -ENOMEM;
+
+ madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config);
+ if (IS_ERR(madera->regmap)) {
+ ret = PTR_ERR(madera->regmap);
+ dev_err(&spi->dev,
+ "Failed to allocate 16-bit register map: %d\n", ret);
+ return ret;
+ }
+
+ madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config);
+ if (IS_ERR(madera->regmap_32bit)) {
+ ret = PTR_ERR(madera->regmap_32bit);
+ dev_err(&spi->dev,
+ "Failed to allocate 32-bit register map: %d\n", ret);
+ return ret;
+ }
+
+ madera->type = type;
+ madera->type_name = name;
+ madera->dev = &spi->dev;
+ madera->irq = spi->irq;
+
+ return madera_dev_init(madera);
+}
+
+static int madera_spi_remove(struct spi_device *spi)
+{
+ struct madera *madera = spi_get_drvdata(spi);
+
+ madera_dev_exit(madera);
+
+ return 0;
+}
+
+static const struct spi_device_id madera_spi_ids[] = {
+ { "cs47l35", CS47L35 },
+ { "cs47l85", CS47L85 },
+ { "cs47l90", CS47L90 },
+ { "cs47l91", CS47L91 },
+ { "wm1840", WM1840 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, madera_spi_ids);
+
+static struct spi_driver madera_spi_driver = {
+ .driver = {
+ .name = "madera",
+ .pm = &madera_pm_ops,
+ .of_match_table = of_match_ptr(madera_of_match),
+ },
+ .probe = madera_spi_probe,
+ .remove = madera_spi_remove,
+ .id_table = madera_spi_ids,
+};
+
+module_spi_driver(madera_spi_driver);
+
+MODULE_DESCRIPTION("Madera SPI bus interface");
+MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/madera.h b/drivers/mfd/madera.h
new file mode 100644
index 000000000000..891b84efb9a7
--- /dev/null
+++ b/drivers/mfd/madera.h
@@ -0,0 +1,44 @@
+/*
+ * MFD internals for Cirrus Logic Madera codecs
+ *
+ * Copyright 2015-2018 Cirrus Logic
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef MADERA_MFD_H
+#define MADERA_MFD_H
+
+#include <linux/of.h>
+#include <linux/pm.h>
+
+struct madera;
+
+extern const struct dev_pm_ops madera_pm_ops;
+extern const struct of_device_id madera_of_match[];
+
+int madera_dev_init(struct madera *madera);
+int madera_dev_exit(struct madera *madera);
+
+const char *madera_name_from_type(enum madera_type type);
+
+extern const struct regmap_config cs47l35_16bit_spi_regmap;
+extern const struct regmap_config cs47l35_32bit_spi_regmap;
+extern const struct regmap_config cs47l35_16bit_i2c_regmap;
+extern const struct regmap_config cs47l35_32bit_i2c_regmap;
+int cs47l35_patch(struct madera *madera);
+
+extern const struct regmap_config cs47l85_16bit_spi_regmap;
+extern const struct regmap_config cs47l85_32bit_spi_regmap;
+extern const struct regmap_config cs47l85_16bit_i2c_regmap;
+extern const struct regmap_config cs47l85_32bit_i2c_regmap;
+int cs47l85_patch(struct madera *madera);
+
+extern const struct regmap_config cs47l90_16bit_spi_regmap;
+extern const struct regmap_config cs47l90_32bit_spi_regmap;
+extern const struct regmap_config cs47l90_16bit_i2c_regmap;
+extern const struct regmap_config cs47l90_32bit_i2c_regmap;
+int cs47l90_patch(struct madera *madera);
+#endif
diff --git a/include/linux/mfd/madera/core.h b/include/linux/mfd/madera/core.h
new file mode 100644
index 000000000000..c332681848ef
--- /dev/null
+++ b/include/linux/mfd/madera/core.h
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MFD internals for Cirrus Logic Madera codecs
+ *
+ * Copyright (C) 2015-2018 Cirrus Logic
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2.
+ */
+
+#ifndef MADERA_CORE_H
+#define MADERA_CORE_H
+
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/madera/pdata.h>
+#include <linux/notifier.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+enum madera_type {
+ /* 0 is reserved for indicating failure to identify */
+ CS47L35 = 1,
+ CS47L85 = 2,
+ CS47L90 = 3,
+ CS47L91 = 4,
+ WM1840 = 7,
+};
+
+#define MADERA_MAX_CORE_SUPPLIES 2
+#define MADERA_MAX_GPIOS 40
+
+#define CS47L35_NUM_GPIOS 16
+#define CS47L85_NUM_GPIOS 40
+#define CS47L90_NUM_GPIOS 38
+
+#define MADERA_MAX_MICBIAS 4
+
+/* Notifier events */
+#define MADERA_NOTIFY_VOICE_TRIGGER 0x1
+#define MADERA_NOTIFY_HPDET 0x2
+#define MADERA_NOTIFY_MICDET 0x4
+
+/* GPIO Function Definitions */
+#define MADERA_GP_FN_ALTERNATE 0x00
+#define MADERA_GP_FN_GPIO 0x01
+#define MADERA_GP_FN_DSP_GPIO 0x02
+#define MADERA_GP_FN_IRQ1 0x03
+#define MADERA_GP_FN_IRQ2 0x04
+#define MADERA_GP_FN_FLL1_CLOCK 0x10
+#define MADERA_GP_FN_FLL2_CLOCK 0x11
+#define MADERA_GP_FN_FLL3_CLOCK 0x12
+#define MADERA_GP_FN_FLLAO_CLOCK 0x13
+#define MADERA_GP_FN_FLL1_LOCK 0x18
+#define MADERA_GP_FN_FLL2_LOCK 0x19
+#define MADERA_GP_FN_FLL3_LOCK 0x1A
+#define MADERA_GP_FN_FLLAO_LOCK 0x1B
+#define MADERA_GP_FN_OPCLK_OUT 0x40
+#define MADERA_GP_FN_OPCLK_ASYNC_OUT 0x41
+#define MADERA_GP_FN_PWM1 0x48
+#define MADERA_GP_FN_PWM2 0x49
+#define MADERA_GP_FN_SPDIF_OUT 0x4C
+#define MADERA_GP_FN_HEADPHONE_DET 0x50
+#define MADERA_GP_FN_MIC_DET 0x58
+#define MADERA_GP_FN_DRC1_SIGNAL_DETECT 0x80
+#define MADERA_GP_FN_DRC2_SIGNAL_DETECT 0x81
+#define MADERA_GP_FN_ASRC1_IN1_LOCK 0x88
+#define MADERA_GP_FN_ASRC1_IN2_LOCK 0x89
+#define MADERA_GP_FN_ASRC2_IN1_LOCK 0x8A
+#define MADERA_GP_FN_ASRC2_IN2_LOCK 0x8B
+#define MADERA_GP_FN_DSP_IRQ1 0xA0
+#define MADERA_GP_FN_DSP_IRQ2 0xA1
+#define MADERA_GP_FN_DSP_IRQ3 0xA2
+#define MADERA_GP_FN_DSP_IRQ4 0xA3
+#define MADERA_GP_FN_DSP_IRQ5 0xA4
+#define MADERA_GP_FN_DSP_IRQ6 0xA5
+#define MADERA_GP_FN_DSP_IRQ7 0xA6
+#define MADERA_GP_FN_DSP_IRQ8 0xA7
+#define MADERA_GP_FN_DSP_IRQ9 0xA8
+#define MADERA_GP_FN_DSP_IRQ10 0xA9
+#define MADERA_GP_FN_DSP_IRQ11 0xAA
+#define MADERA_GP_FN_DSP_IRQ12 0xAB
+#define MADERA_GP_FN_DSP_IRQ13 0xAC
+#define MADERA_GP_FN_DSP_IRQ14 0xAD
+#define MADERA_GP_FN_DSP_IRQ15 0xAE
+#define MADERA_GP_FN_DSP_IRQ16 0xAF
+#define MADERA_GP_FN_HPOUT1L_SC 0xB0
+#define MADERA_GP_FN_HPOUT1R_SC 0xB1
+#define MADERA_GP_FN_HPOUT2L_SC 0xB2
+#define MADERA_GP_FN_HPOUT2R_SC 0xB3
+#define MADERA_GP_FN_HPOUT3L_SC 0xB4
+#define MADERA_GP_FN_HPOUT4R_SC 0xB5
+#define MADERA_GP_FN_SPKOUTL_SC 0xB6
+#define MADERA_GP_FN_SPKOUTR_SC 0xB7
+#define MADERA_GP_FN_HPOUT1L_ENA 0xC0
+#define MADERA_GP_FN_HPOUT1R_ENA 0xC1
+#define MADERA_GP_FN_HPOUT2L_ENA 0xC2
+#define MADERA_GP_FN_HPOUT2R_ENA 0xC3
+#define MADERA_GP_FN_HPOUT3L_ENA 0xC4
+#define MADERA_GP_FN_HPOUT4R_ENA 0xC5
+#define MADERA_GP_FN_SPKOUTL_ENA 0xC6
+#define MADERA_GP_FN_SPKOUTR_ENA 0xC7
+#define MADERA_GP_FN_HPOUT1L_DIS 0xD0
+#define MADERA_GP_FN_HPOUT1R_DIS 0xD1
+#define MADERA_GP_FN_HPOUT2L_DIS 0xD2
+#define MADERA_GP_FN_HPOUT2R_DIS 0xD3
+#define MADERA_GP_FN_HPOUT3L_DIS 0xD4
+#define MADERA_GP_FN_HPOUT4R_DIS 0xD5
+#define MADERA_GP_FN_SPKOUTL_DIS 0xD6
+#define MADERA_GP_FN_SPKOUTR_DIS 0xD7
+#define MADERA_GP_FN_SPK_SHUTDOWN 0xE0
+#define MADERA_GP_FN_SPK_OVH_SHUTDOWN 0xE1
+#define MADERA_GP_FN_SPK_OVH_WARN 0xE2
+#define MADERA_GP_FN_TIMER1_STATUS 0x140
+#define MADERA_GP_FN_TIMER2_STATUS 0x141
+#define MADERA_GP_FN_TIMER3_STATUS 0x142
+#define MADERA_GP_FN_TIMER4_STATUS 0x143
+#define MADERA_GP_FN_TIMER5_STATUS 0x144
+#define MADERA_GP_FN_TIMER6_STATUS 0x145
+#define MADERA_GP_FN_TIMER7_STATUS 0x146
+#define MADERA_GP_FN_TIMER8_STATUS 0x147
+#define MADERA_GP_FN_EVENTLOG1_FIFO_STS 0x150
+#define MADERA_GP_FN_EVENTLOG2_FIFO_STS 0x151
+#define MADERA_GP_FN_EVENTLOG3_FIFO_STS 0x152
+#define MADERA_GP_FN_EVENTLOG4_FIFO_STS 0x153
+#define MADERA_GP_FN_EVENTLOG5_FIFO_STS 0x154
+#define MADERA_GP_FN_EVENTLOG6_FIFO_STS 0x155
+#define MADERA_GP_FN_EVENTLOG7_FIFO_STS 0x156
+#define MADERA_GP_FN_EVENTLOG8_FIFO_STS 0x157
+
+struct snd_soc_dapm_context;
+
+/*
+ * struct madera - internal data shared by the set of Madera drivers
+ *
+ * This should not be used by anything except child drivers of the Madera MFD
+ *
+ * @regmap: pointer to the regmap instance for 16-bit registers
+ * @regmap_32bit: pointer to the regmap instance for 32-bit registers
+ * @dev: pointer to the MFD device
+ * @type: type of codec
+ * @rev: silicon revision
+ * @type_name: display name of this codec
+ * @num_core_supplies: number of core supply regulators
+ * @core_supplies: list of core supplies that are always required
+ * @dcvdd: pointer to DCVDD regulator
+ * @internal_dcvdd: true if DCVDD is supplied from the internal LDO1
+ * @pdata: our pdata
+ * @irq_dev: the irqchip child driver device
+ * @irq: host irq number from SPI or I2C configuration
+ * @out_clamp: indicates output clamp state for each analogue output
+ * @out_shorted: indicates short circuit state for each analogue output
+ * @hp_ena: bitflags of enable state for the headphone outputs
+ * @num_micbias: number of MICBIAS outputs
+ * @num_childbias: number of child biases for each MICBIAS
+ * @dapm: pointer to codec driver DAPM context
+ * @notifier: notifier for signalling events to ASoC machine driver
+ */
+struct madera {
+ struct regmap *regmap;
+ struct regmap *regmap_32bit;
+
+ struct device *dev;
+
+ enum madera_type type;
+ unsigned int rev;
+ const char *type_name;
+
+ int num_core_supplies;
+ struct regulator_bulk_data core_supplies[MADERA_MAX_CORE_SUPPLIES];
+ struct regulator *dcvdd;
+ bool internal_dcvdd;
+
+ struct madera_pdata pdata;
+
+ struct device *irq_dev;
+ int irq;
+
+ unsigned int num_micbias;
+ unsigned int num_childbias[MADERA_MAX_MICBIAS];
+
+ struct snd_soc_dapm_context *dapm;
+
+ struct blocking_notifier_head notifier;
+};
+#endif
diff --git a/include/linux/mfd/madera/pdata.h b/include/linux/mfd/madera/pdata.h
new file mode 100644
index 000000000000..0b311f39c8f4
--- /dev/null
+++ b/include/linux/mfd/madera/pdata.h
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Platform data for Cirrus Logic Madera codecs
+ *
+ * Copyright (C) 2015-2018 Cirrus Logic
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2.
+ */
+
+#ifndef MADERA_PDATA_H
+#define MADERA_PDATA_H
+
+#include <linux/kernel.h>
+#include <linux/regulator/arizona-ldo1.h>
+#include <linux/regulator/arizona-micsupp.h>
+#include <linux/regulator/machine.h>
+
+#define MADERA_MAX_MICBIAS 4
+#define MADERA_MAX_CHILD_MICBIAS 4
+
+#define MADERA_MAX_GPSW 2
+
+struct gpio_desc;
+struct pinctrl_map;
+struct madera_irqchip_pdata;
+struct madera_codec_pdata;
+
+/**
+ * struct madera_pdata - Configuration data for Madera devices
+ *
+ * @reset: GPIO controlling /RESET (NULL = none)
+ * @ldo1: Substruct of pdata for the LDO1 regulator
+ * @micvdd: Substruct of pdata for the MICVDD regulator
+ * @irq_flags: Mode for primary IRQ (defaults to active low)
+ * @gpio_base: Base GPIO number
+ * @gpio_configs: Array of GPIO configurations (See Documentation/pinctrl.txt)
+ * @n_gpio_configs: Number of entries in gpio_configs
+ * @gpsw: General purpose switch mode setting. Depends on the external
+ * hardware connected to the switch. (See the SW1_MODE field
+ * in the datasheet for the available values for your codec)
+ */
+struct madera_pdata {
+ struct gpio_desc *reset;
+
+ struct arizona_ldo1_pdata ldo1;
+ struct arizona_micsupp_pdata micvdd;
+
+ unsigned int irq_flags;
+ int gpio_base;
+
+ const struct pinctrl_map *gpio_configs;
+ int n_gpio_configs;
+
+ u32 gpsw[MADERA_MAX_GPSW];
+};
+
+#endif
--
2.11.0
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