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-rw-r--r--drivers/mfd/Kconfig18
-rw-r--r--drivers/mfd/Makefile3
-rw-r--r--drivers/mfd/atc260x-core.c310
-rw-r--r--drivers/mfd/atc260x-i2c.c64
4 files changed, 395 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index b74efa469e90..f9b43f15790b 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -2055,6 +2055,24 @@ config MFD_WCD934X
This driver provides common support WCD934x audio codec and its
associated Pin Controller, Soundwire Controller and Audio codec.
+config MFD_ATC260X
+ tristate
+ select MFD_CORE
+ select REGMAP
+ select REGMAP_IRQ
+
+config MFD_ATC260X_I2C
+ tristate "Actions Semi ATC260x PMICs with I2C"
+ select MFD_ATC260X
+ select REGMAP_I2C
+ depends on I2C
+ help
+ Support for the Actions Semi ATC260x PMICs controlled via I2C.
+
+ This driver provides common support for accessing the ATC2603C
+ and ATC2609A chip variants, additional drivers must be enabled
+ in order to use the functionality of the device.
+
config MFD_KHADAS_MCU
tristate "Support for Khadas System control Microcontroller"
depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 834f5463af28..f7872d0bd570 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -268,3 +268,6 @@ obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o
obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o
obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o
obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o
+
+obj-$(CONFIG_MFD_ATC260X) += atc260x-core.o
+obj-$(CONFIG_MFD_ATC260X_I2C) += atc260x-i2c.o
diff --git a/drivers/mfd/atc260x-core.c b/drivers/mfd/atc260x-core.c
new file mode 100644
index 000000000000..7148ff5b05b1
--- /dev/null
+++ b/drivers/mfd/atc260x-core.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Core support for ATC260x PMICs
+ *
+ * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+ * Copyright (C) 2020 Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
+ */
+
+#include <linux/interrupt.h>
+#include <linux/mfd/atc260x/core.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+#define ATC260X_CHIP_REV_MAX 31
+
+struct atc260x_init_regs {
+ unsigned int cmu_devrst;
+ unsigned int cmu_devrst_ints;
+ unsigned int ints_msk;
+ unsigned int pad_en;
+ unsigned int pad_en_extirq;
+};
+
+static void regmap_lock_mutex(void *__mutex)
+{
+ struct mutex *mutex = __mutex;
+
+ /*
+ * Using regmap within an atomic context (e.g. accessing a PMIC when
+ * powering system down) is normally allowed only if the regmap type
+ * is MMIO and the regcache type is either REGCACHE_NONE or
+ * REGCACHE_FLAT. For slow buses like I2C and SPI, the regmap is
+ * internally protected by a mutex which is acquired non-atomically.
+ *
+ * Let's improve this by using a customized locking scheme inspired
+ * from I2C atomic transfer. See i2c_in_atomic_xfer_mode() for a
+ * starting point.
+ */
+ if (system_state > SYSTEM_RUNNING && irqs_disabled())
+ mutex_trylock(mutex);
+ else
+ mutex_lock(mutex);
+}
+
+static void regmap_unlock_mutex(void *__mutex)
+{
+ struct mutex *mutex = __mutex;
+
+ mutex_unlock(mutex);
+}
+
+static const struct regmap_config atc2603c_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 16,
+ .max_register = ATC2603C_SADDR,
+ .cache_type = REGCACHE_NONE,
+};
+
+static const struct regmap_config atc2609a_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 16,
+ .max_register = ATC2609A_SADDR,
+ .cache_type = REGCACHE_NONE,
+};
+
+static const struct regmap_irq atc2603c_regmap_irqs[] = {
+ REGMAP_IRQ_REG(ATC2603C_IRQ_AUDIO, 0, ATC2603C_INTS_MSK_AUDIO),
+ REGMAP_IRQ_REG(ATC2603C_IRQ_OV, 0, ATC2603C_INTS_MSK_OV),
+ REGMAP_IRQ_REG(ATC2603C_IRQ_OC, 0, ATC2603C_INTS_MSK_OC),
+ REGMAP_IRQ_REG(ATC2603C_IRQ_OT, 0, ATC2603C_INTS_MSK_OT),
+ REGMAP_IRQ_REG(ATC2603C_IRQ_UV, 0, ATC2603C_INTS_MSK_UV),
+ REGMAP_IRQ_REG(ATC2603C_IRQ_ALARM, 0, ATC2603C_INTS_MSK_ALARM),
+ REGMAP_IRQ_REG(ATC2603C_IRQ_ONOFF, 0, ATC2603C_INTS_MSK_ONOFF),
+ REGMAP_IRQ_REG(ATC2603C_IRQ_SGPIO, 0, ATC2603C_INTS_MSK_SGPIO),
+ REGMAP_IRQ_REG(ATC2603C_IRQ_IR, 0, ATC2603C_INTS_MSK_IR),
+ REGMAP_IRQ_REG(ATC2603C_IRQ_REMCON, 0, ATC2603C_INTS_MSK_REMCON),
+ REGMAP_IRQ_REG(ATC2603C_IRQ_POWER_IN, 0, ATC2603C_INTS_MSK_POWERIN),
+};
+
+static const struct regmap_irq atc2609a_regmap_irqs[] = {
+ REGMAP_IRQ_REG(ATC2609A_IRQ_AUDIO, 0, ATC2609A_INTS_MSK_AUDIO),
+ REGMAP_IRQ_REG(ATC2609A_IRQ_OV, 0, ATC2609A_INTS_MSK_OV),
+ REGMAP_IRQ_REG(ATC2609A_IRQ_OC, 0, ATC2609A_INTS_MSK_OC),
+ REGMAP_IRQ_REG(ATC2609A_IRQ_OT, 0, ATC2609A_INTS_MSK_OT),
+ REGMAP_IRQ_REG(ATC2609A_IRQ_UV, 0, ATC2609A_INTS_MSK_UV),
+ REGMAP_IRQ_REG(ATC2609A_IRQ_ALARM, 0, ATC2609A_INTS_MSK_ALARM),
+ REGMAP_IRQ_REG(ATC2609A_IRQ_ONOFF, 0, ATC2609A_INTS_MSK_ONOFF),
+ REGMAP_IRQ_REG(ATC2609A_IRQ_WKUP, 0, ATC2609A_INTS_MSK_WKUP),
+ REGMAP_IRQ_REG(ATC2609A_IRQ_IR, 0, ATC2609A_INTS_MSK_IR),
+ REGMAP_IRQ_REG(ATC2609A_IRQ_REMCON, 0, ATC2609A_INTS_MSK_REMCON),
+ REGMAP_IRQ_REG(ATC2609A_IRQ_POWER_IN, 0, ATC2609A_INTS_MSK_POWERIN),
+};
+
+static const struct regmap_irq_chip atc2603c_regmap_irq_chip = {
+ .name = "atc2603c",
+ .irqs = atc2603c_regmap_irqs,
+ .num_irqs = ARRAY_SIZE(atc2603c_regmap_irqs),
+ .num_regs = 1,
+ .status_base = ATC2603C_INTS_PD,
+ .mask_base = ATC2603C_INTS_MSK,
+ .mask_invert = true,
+};
+
+static const struct regmap_irq_chip atc2609a_regmap_irq_chip = {
+ .name = "atc2609a",
+ .irqs = atc2609a_regmap_irqs,
+ .num_irqs = ARRAY_SIZE(atc2609a_regmap_irqs),
+ .num_regs = 1,
+ .status_base = ATC2609A_INTS_PD,
+ .mask_base = ATC2609A_INTS_MSK,
+ .mask_invert = true,
+};
+
+static const struct resource atc2603c_onkey_resources[] = {
+ DEFINE_RES_IRQ(ATC2603C_IRQ_ONOFF),
+};
+
+static const struct resource atc2609a_onkey_resources[] = {
+ DEFINE_RES_IRQ(ATC2609A_IRQ_ONOFF),
+};
+
+static const struct mfd_cell atc2603c_mfd_cells[] = {
+ { .name = "atc260x-regulator" },
+ { .name = "atc260x-pwrc" },
+ {
+ .name = "atc260x-onkey",
+ .num_resources = ARRAY_SIZE(atc2603c_onkey_resources),
+ .resources = atc2603c_onkey_resources,
+ },
+};
+
+static const struct mfd_cell atc2609a_mfd_cells[] = {
+ { .name = "atc260x-regulator" },
+ { .name = "atc260x-pwrc" },
+ {
+ .name = "atc260x-onkey",
+ .num_resources = ARRAY_SIZE(atc2609a_onkey_resources),
+ .resources = atc2609a_onkey_resources,
+ },
+};
+
+static const struct atc260x_init_regs atc2603c_init_regs = {
+ .cmu_devrst = ATC2603C_CMU_DEVRST,
+ .cmu_devrst_ints = ATC2603C_CMU_DEVRST_INTS,
+ .ints_msk = ATC2603C_INTS_MSK,
+ .pad_en = ATC2603C_PAD_EN,
+ .pad_en_extirq = ATC2603C_PAD_EN_EXTIRQ,
+};
+
+static const struct atc260x_init_regs atc2609a_init_regs = {
+ .cmu_devrst = ATC2609A_CMU_DEVRST,
+ .cmu_devrst_ints = ATC2609A_CMU_DEVRST_INTS,
+ .ints_msk = ATC2609A_INTS_MSK,
+ .pad_en = ATC2609A_PAD_EN,
+ .pad_en_extirq = ATC2609A_PAD_EN_EXTIRQ,
+};
+
+static void atc260x_cmu_reset(struct atc260x *atc260x)
+{
+ const struct atc260x_init_regs *regs = atc260x->init_regs;
+
+ /* Assert reset */
+ regmap_update_bits(atc260x->regmap, regs->cmu_devrst,
+ regs->cmu_devrst_ints, ~regs->cmu_devrst_ints);
+
+ /* De-assert reset */
+ regmap_update_bits(atc260x->regmap, regs->cmu_devrst,
+ regs->cmu_devrst_ints, regs->cmu_devrst_ints);
+}
+
+static void atc260x_dev_init(struct atc260x *atc260x)
+{
+ const struct atc260x_init_regs *regs = atc260x->init_regs;
+
+ /* Initialize interrupt block */
+ atc260x_cmu_reset(atc260x);
+
+ /* Disable all interrupt sources */
+ regmap_write(atc260x->regmap, regs->ints_msk, 0);
+
+ /* Enable EXTIRQ pad */
+ regmap_update_bits(atc260x->regmap, regs->pad_en,
+ regs->pad_en_extirq, regs->pad_en_extirq);
+}
+
+/**
+ * atc260x_match_device(): Setup ATC260x variant related fields
+ *
+ * @atc260x: ATC260x device to setup (.dev field must be set)
+ * @regmap_cfg: regmap config associated with this ATC260x device
+ *
+ * This lets the ATC260x core configure the MFD cells and register maps
+ * for later use.
+ */
+int atc260x_match_device(struct atc260x *atc260x, struct regmap_config *regmap_cfg)
+{
+ struct device *dev = atc260x->dev;
+ const void *of_data;
+
+ of_data = of_device_get_match_data(dev);
+ if (!of_data)
+ return -ENODEV;
+
+ atc260x->ic_type = (unsigned long)of_data;
+
+ switch (atc260x->ic_type) {
+ case ATC2603C:
+ *regmap_cfg = atc2603c_regmap_config;
+ atc260x->regmap_irq_chip = &atc2603c_regmap_irq_chip;
+ atc260x->cells = atc2603c_mfd_cells;
+ atc260x->nr_cells = ARRAY_SIZE(atc2603c_mfd_cells);
+ atc260x->type_name = "atc2603c";
+ atc260x->rev_reg = ATC2603C_CHIP_VER;
+ atc260x->init_regs = &atc2603c_init_regs;
+ break;
+ case ATC2609A:
+ *regmap_cfg = atc2609a_regmap_config;
+ atc260x->regmap_irq_chip = &atc2609a_regmap_irq_chip;
+ atc260x->cells = atc2609a_mfd_cells;
+ atc260x->nr_cells = ARRAY_SIZE(atc2609a_mfd_cells);
+ atc260x->type_name = "atc2609a";
+ atc260x->rev_reg = ATC2609A_CHIP_VER;
+ atc260x->init_regs = &atc2609a_init_regs;
+ break;
+ default:
+ dev_err(dev, "Unsupported ATC260x device type: %u\n",
+ atc260x->ic_type);
+ return -EINVAL;
+ }
+
+ atc260x->regmap_mutex = devm_kzalloc(dev, sizeof(*atc260x->regmap_mutex),
+ GFP_KERNEL);
+ if (!atc260x->regmap_mutex)
+ return -ENOMEM;
+
+ mutex_init(atc260x->regmap_mutex);
+
+ regmap_cfg->lock = regmap_lock_mutex,
+ regmap_cfg->unlock = regmap_unlock_mutex,
+ regmap_cfg->lock_arg = atc260x->regmap_mutex;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(atc260x_match_device);
+
+/**
+ * atc260x_device_probe(): Probe a configured ATC260x device
+ *
+ * @atc260x: ATC260x device to probe (must be configured)
+ *
+ * This function lets the ATC260x core register the ATC260x MFD devices
+ * and IRQCHIP. The ATC260x device passed in must be fully configured
+ * with atc260x_match_device, its IRQ set, and regmap created.
+ */
+int atc260x_device_probe(struct atc260x *atc260x)
+{
+ struct device *dev = atc260x->dev;
+ unsigned int chip_rev;
+ int ret;
+
+ if (!atc260x->irq) {
+ dev_err(dev, "No interrupt support\n");
+ return -EINVAL;
+ }
+
+ /* Initialize the hardware */
+ atc260x_dev_init(atc260x);
+
+ ret = regmap_read(atc260x->regmap, atc260x->rev_reg, &chip_rev);
+ if (ret) {
+ dev_err(dev, "Failed to get chip revision\n");
+ return ret;
+ }
+
+ if (chip_rev > ATC260X_CHIP_REV_MAX) {
+ dev_err(dev, "Unknown chip revision: %u\n", chip_rev);
+ return -EINVAL;
+ }
+
+ atc260x->ic_ver = __ffs(chip_rev + 1U);
+
+ dev_info(dev, "Detected chip type %s rev.%c\n",
+ atc260x->type_name, 'A' + atc260x->ic_ver);
+
+ ret = devm_regmap_add_irq_chip(dev, atc260x->regmap, atc260x->irq, IRQF_ONESHOT,
+ -1, atc260x->regmap_irq_chip, &atc260x->irq_data);
+ if (ret) {
+ dev_err(dev, "Failed to add IRQ chip: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
+ atc260x->cells, atc260x->nr_cells, NULL, 0,
+ regmap_irq_get_domain(atc260x->irq_data));
+ if (ret) {
+ dev_err(dev, "Failed to add child devices: %d\n", ret);
+ regmap_del_irq_chip(atc260x->irq, atc260x->irq_data);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(atc260x_device_probe);
+
+MODULE_DESCRIPTION("ATC260x PMICs Core support");
+MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
+MODULE_AUTHOR("Cristian Ciocaltea <cristian.ciocaltea@gmail.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/atc260x-i2c.c b/drivers/mfd/atc260x-i2c.c
new file mode 100644
index 000000000000..362005703367
--- /dev/null
+++ b/drivers/mfd/atc260x-i2c.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * I2C bus interface for ATC260x PMICs
+ *
+ * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+ * Copyright (C) 2020 Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/mfd/atc260x/core.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+static int atc260x_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct atc260x *atc260x;
+ struct regmap_config regmap_cfg;
+ int ret;
+
+ atc260x = devm_kzalloc(&client->dev, sizeof(*atc260x), GFP_KERNEL);
+ if (!atc260x)
+ return -ENOMEM;
+
+ atc260x->dev = &client->dev;
+ atc260x->irq = client->irq;
+
+ ret = atc260x_match_device(atc260x, &regmap_cfg);
+ if (ret)
+ return ret;
+
+ i2c_set_clientdata(client, atc260x);
+
+ atc260x->regmap = devm_regmap_init_i2c(client, &regmap_cfg);
+ if (IS_ERR(atc260x->regmap)) {
+ ret = PTR_ERR(atc260x->regmap);
+ dev_err(&client->dev, "failed to init regmap: %d\n", ret);
+ return ret;
+ }
+
+ return atc260x_device_probe(atc260x);
+}
+
+const struct of_device_id atc260x_i2c_of_match[] = {
+ { .compatible = "actions,atc2603c", .data = (void *)ATC2603C },
+ { .compatible = "actions,atc2609a", .data = (void *)ATC2609A },
+ { }
+};
+MODULE_DEVICE_TABLE(of, atc260x_i2c_of_match);
+
+static struct i2c_driver atc260x_i2c_driver = {
+ .driver = {
+ .name = "atc260x",
+ .of_match_table = of_match_ptr(atc260x_i2c_of_match),
+ },
+ .probe = atc260x_i2c_probe,
+};
+module_i2c_driver(atc260x_i2c_driver);
+
+MODULE_DESCRIPTION("ATC260x PMICs I2C bus interface");
+MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
+MODULE_AUTHOR("Cristian Ciocaltea <cristian.ciocaltea@gmail.com>");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-06 22:35:31 +0000