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Diffstat (limited to 'drivers/mfd/arizona-spi.c')
-rw-r--r--drivers/mfd/arizona-spi.c303
1 files changed, 303 insertions, 0 deletions
diff --git a/drivers/mfd/arizona-spi.c b/drivers/mfd/arizona-spi.c
new file mode 100644
index 0000000000..de5d894ac0
--- /dev/null
+++ b/drivers/mfd/arizona-spi.c
@@ -0,0 +1,303 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * arizona-spi.c -- Arizona SPI bus interface
+ *
+ * Copyright 2012 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/machine.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/of.h>
+#include <uapi/linux/input-event-codes.h>
+
+#include <linux/mfd/arizona/core.h>
+
+#include "arizona.h"
+
+#ifdef CONFIG_ACPI
+static const struct acpi_gpio_params reset_gpios = { 1, 0, false };
+static const struct acpi_gpio_params ldoena_gpios = { 2, 0, false };
+
+static const struct acpi_gpio_mapping arizona_acpi_gpios[] = {
+ { "reset-gpios", &reset_gpios, 1, },
+ { "wlf,ldoena-gpios", &ldoena_gpios, 1 },
+ { }
+};
+
+/*
+ * The ACPI resources for the device only describe external GPIO-s. They do
+ * not provide mappings for the GPIO-s coming from the Arizona codec itself.
+ */
+static const struct gpiod_lookup arizona_soc_gpios[] = {
+ { "arizona", 2, "wlf,spkvdd-ena", 0, GPIO_ACTIVE_HIGH },
+ { "arizona", 4, "wlf,micd-pol", 0, GPIO_ACTIVE_LOW },
+};
+
+static void arizona_spi_acpi_remove_lookup(void *lookup)
+{
+ gpiod_remove_lookup_table(lookup);
+}
+
+/* For ACPI tables from boards which ship with Windows as factory OS */
+static int arizona_spi_acpi_windows_probe(struct arizona *arizona)
+{
+ struct gpiod_lookup_table *lookup;
+ acpi_status status;
+ int ret;
+
+ /* Add mappings for the 2 ACPI declared GPIOs used for reset and ldo-ena */
+ devm_acpi_dev_add_driver_gpios(arizona->dev, arizona_acpi_gpios);
+
+ /* Add lookups for the SoCs own GPIOs used for micdet-polarity and spkVDD-enable */
+ lookup = devm_kzalloc(arizona->dev,
+ struct_size(lookup, table, ARRAY_SIZE(arizona_soc_gpios) + 1),
+ GFP_KERNEL);
+ if (!lookup)
+ return -ENOMEM;
+
+ lookup->dev_id = dev_name(arizona->dev);
+ memcpy(lookup->table, arizona_soc_gpios, sizeof(arizona_soc_gpios));
+
+ gpiod_add_lookup_table(lookup);
+ ret = devm_add_action_or_reset(arizona->dev, arizona_spi_acpi_remove_lookup, lookup);
+ if (ret)
+ return ret;
+
+ /* Enable 32KHz clock from SoC to codec for jack-detect */
+ status = acpi_evaluate_object(ACPI_HANDLE(arizona->dev), "CLKE", NULL, NULL);
+ if (ACPI_FAILURE(status))
+ dev_warn(arizona->dev, "Failed to enable 32KHz clk ACPI error %d\n", status);
+
+ return 0;
+}
+
+/* For ACPI tables from boards which ship with Android as factory OS */
+static int arizona_spi_acpi_android_probe(struct arizona *arizona)
+{
+ int ret;
+
+ /*
+ * Get the reset GPIO, treating -ENOENT as -EPROBE_DEFER to wait for
+ * the x86-android-tablets module to register the board specific GPIO
+ * lookup table.
+ */
+ arizona->pdata.reset = devm_gpiod_get(arizona->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(arizona->pdata.reset)) {
+ ret = PTR_ERR(arizona->pdata.reset);
+ if (ret == -ENOENT) {
+ dev_info_once(arizona->dev,
+ "Deferring probe till GPIO lookup is registered\n");
+ ret = -EPROBE_DEFER;
+ }
+ return dev_err_probe(arizona->dev, ret, "getting reset GPIO\n");
+ }
+
+ return 0;
+}
+
+/*
+ * The AOSP 3.5 mm Headset: Accessory Specification gives the following values:
+ * Function A Play/Pause: 0 ohm
+ * Function D Voice assistant: 135 ohm
+ * Function B Volume Up 240 ohm
+ * Function C Volume Down 470 ohm
+ * Minimum Mic DC resistance 1000 ohm
+ * Minimum Ear speaker impedance 16 ohm
+ * Note the first max value below must be less then the min. speaker impedance,
+ * to allow CTIA/OMTP detection to work. The other max values are the closest
+ * value from extcon-arizona.c:arizona_micd_levels halfway 2 button resistances.
+ */
+static const struct arizona_micd_range arizona_micd_aosp_ranges[] = {
+ { .max = 11, .key = KEY_PLAYPAUSE },
+ { .max = 186, .key = KEY_VOICECOMMAND },
+ { .max = 348, .key = KEY_VOLUMEUP },
+ { .max = 752, .key = KEY_VOLUMEDOWN },
+};
+
+static int arizona_spi_acpi_probe(struct arizona *arizona)
+{
+ struct acpi_device *adev = ACPI_COMPANION(arizona->dev);
+ int ret;
+
+ if (acpi_dev_hid_uid_match(adev, "10WM5102", NULL))
+ ret = arizona_spi_acpi_android_probe(arizona);
+ else
+ ret = arizona_spi_acpi_windows_probe(arizona);
+
+ if (ret)
+ return ret;
+
+ /*
+ * Some DSDTs wrongly declare the IRQ trigger-type as IRQF_TRIGGER_FALLING
+ * The IRQ line will stay low when a new IRQ event happens between reading
+ * the IRQ status flags and acknowledging them. When the IRQ line stays
+ * low like this the IRQ will never trigger again when its type is set
+ * to IRQF_TRIGGER_FALLING. Correct the IRQ trigger-type to fix this.
+ *
+ * Note theoretically it is possible that some boards are not capable
+ * of handling active low level interrupts. In that case setting the
+ * flag to IRQF_TRIGGER_FALLING would not be a bug (and we would need
+ * to work around this) but so far all known usages of IRQF_TRIGGER_FALLING
+ * are a bug in the board's DSDT.
+ */
+ arizona->pdata.irq_flags = IRQF_TRIGGER_LOW;
+
+ /* Wait 200 ms after jack insertion */
+ arizona->pdata.micd_detect_debounce = 200;
+
+ /* Use standard AOSP values for headset-button mappings */
+ arizona->pdata.micd_ranges = arizona_micd_aosp_ranges;
+ arizona->pdata.num_micd_ranges = ARRAY_SIZE(arizona_micd_aosp_ranges);
+
+ /* Use left headphone speaker for HP vs line-out detection */
+ arizona->pdata.hpdet_channel = ARIZONA_ACCDET_MODE_HPL;
+
+ return 0;
+}
+
+static const struct acpi_device_id arizona_acpi_match[] = {
+ {
+ .id = "WM510204",
+ .driver_data = WM5102,
+ },
+ {
+ .id = "WM510205",
+ .driver_data = WM5102,
+ },
+ {
+ .id = "10WM5102",
+ .driver_data = WM5102,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, arizona_acpi_match);
+#else
+static int arizona_spi_acpi_probe(struct arizona *arizona)
+{
+ return -ENODEV;
+}
+#endif
+
+static int arizona_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ const void *match_data;
+ struct arizona *arizona;
+ const struct regmap_config *regmap_config = NULL;
+ unsigned long type = 0;
+ int ret;
+
+ match_data = device_get_match_data(&spi->dev);
+ if (match_data)
+ type = (unsigned long)match_data;
+ else if (id)
+ type = id->driver_data;
+
+ switch (type) {
+ case WM5102:
+ if (IS_ENABLED(CONFIG_MFD_WM5102))
+ regmap_config = &wm5102_spi_regmap;
+ break;
+ case WM5110:
+ case WM8280:
+ if (IS_ENABLED(CONFIG_MFD_WM5110))
+ regmap_config = &wm5110_spi_regmap;
+ break;
+ case WM1831:
+ case CS47L24:
+ if (IS_ENABLED(CONFIG_MFD_CS47L24))
+ regmap_config = &cs47l24_spi_regmap;
+ break;
+ default:
+ dev_err(&spi->dev, "Unknown device type %ld\n", type);
+ return -EINVAL;
+ }
+
+ if (!regmap_config) {
+ dev_err(&spi->dev,
+ "No kernel support for device type %ld\n", type);
+ return -EINVAL;
+ }
+
+ arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
+ if (arizona == NULL)
+ return -ENOMEM;
+
+ arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
+ if (IS_ERR(arizona->regmap)) {
+ ret = PTR_ERR(arizona->regmap);
+ dev_err(&spi->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ arizona->type = type;
+ arizona->dev = &spi->dev;
+ arizona->irq = spi->irq;
+
+ if (has_acpi_companion(&spi->dev)) {
+ ret = arizona_spi_acpi_probe(arizona);
+ if (ret)
+ return ret;
+ }
+
+ return arizona_dev_init(arizona);
+}
+
+static void arizona_spi_remove(struct spi_device *spi)
+{
+ struct arizona *arizona = spi_get_drvdata(spi);
+
+ arizona_dev_exit(arizona);
+}
+
+static const struct spi_device_id arizona_spi_ids[] = {
+ { "wm5102", WM5102 },
+ { "wm5110", WM5110 },
+ { "wm8280", WM8280 },
+ { "wm1831", WM1831 },
+ { "cs47l24", CS47L24 },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
+
+#ifdef CONFIG_OF
+static const struct of_device_id arizona_spi_of_match[] = {
+ { .compatible = "wlf,wm5102", .data = (void *)WM5102 },
+ { .compatible = "wlf,wm5110", .data = (void *)WM5110 },
+ { .compatible = "wlf,wm8280", .data = (void *)WM8280 },
+ { .compatible = "wlf,wm1831", .data = (void *)WM1831 },
+ { .compatible = "cirrus,cs47l24", .data = (void *)CS47L24 },
+ {},
+};
+MODULE_DEVICE_TABLE(of, arizona_spi_of_match);
+#endif
+
+static struct spi_driver arizona_spi_driver = {
+ .driver = {
+ .name = "arizona",
+ .pm = pm_ptr(&arizona_pm_ops),
+ .of_match_table = of_match_ptr(arizona_spi_of_match),
+ .acpi_match_table = ACPI_PTR(arizona_acpi_match),
+ },
+ .probe = arizona_spi_probe,
+ .remove = arizona_spi_remove,
+ .id_table = arizona_spi_ids,
+};
+
+module_spi_driver(arizona_spi_driver);
+
+MODULE_SOFTDEP("pre: arizona_ldo1");
+MODULE_DESCRIPTION("Arizona SPI bus interface");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");