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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/mfd/wcd934x.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/mfd/wcd934x.c')
-rw-r--r--drivers/mfd/wcd934x.c302
1 files changed, 302 insertions, 0 deletions
diff --git a/drivers/mfd/wcd934x.c b/drivers/mfd/wcd934x.c
new file mode 100644
index 0000000000..6b942d5270
--- /dev/null
+++ b/drivers/mfd/wcd934x.c
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2019, Linaro Limited
+
+#include <linux/clk.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/wcd934x/registers.h>
+#include <linux/mfd/wcd934x/wcd934x.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slimbus.h>
+
+#define WCD934X_REGMAP_IRQ_REG(_irq, _off, _mask) \
+ [_irq] = { \
+ .reg_offset = (_off), \
+ .mask = (_mask), \
+ .type = { \
+ .type_reg_offset = (_off), \
+ .types_supported = IRQ_TYPE_EDGE_BOTH, \
+ .type_reg_mask = (_mask), \
+ .type_level_low_val = (_mask), \
+ .type_level_high_val = (_mask), \
+ .type_falling_val = 0, \
+ .type_rising_val = 0, \
+ }, \
+ }
+
+static const struct mfd_cell wcd934x_devices[] = {
+ {
+ .name = "wcd934x-codec",
+ }, {
+ .name = "wcd934x-gpio",
+ .of_compatible = "qcom,wcd9340-gpio",
+ }, {
+ .name = "wcd934x-soundwire",
+ .of_compatible = "qcom,soundwire-v1.3.0",
+ },
+};
+
+static const struct regmap_irq wcd934x_irqs[] = {
+ WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SLIMBUS, 0, BIT(0)),
+ WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPL_FAULT, 0, BIT(2)),
+ WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPR_FAULT, 0, BIT(3)),
+ WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_SW_DET, 1, BIT(0)),
+ WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_DET, 1, BIT(1)),
+ WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_PRESS_DET, 1, BIT(2)),
+ WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_RELEASE_DET, 1, BIT(3)),
+ WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_LEG_DET, 1, BIT(4)),
+ WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SOUNDWIRE, 2, BIT(4)),
+};
+
+static const unsigned int wcd934x_config_regs[] = {
+ WCD934X_INTR_LEVEL0,
+};
+
+static const struct regmap_irq_chip wcd934x_regmap_irq_chip = {
+ .name = "wcd934x_irq",
+ .status_base = WCD934X_INTR_PIN1_STATUS0,
+ .mask_base = WCD934X_INTR_PIN1_MASK0,
+ .ack_base = WCD934X_INTR_PIN1_CLEAR0,
+ .num_regs = 4,
+ .irqs = wcd934x_irqs,
+ .num_irqs = ARRAY_SIZE(wcd934x_irqs),
+ .config_base = wcd934x_config_regs,
+ .num_config_bases = ARRAY_SIZE(wcd934x_config_regs),
+ .num_config_regs = 4,
+ .set_type_config = regmap_irq_set_type_config_simple,
+};
+
+static bool wcd934x_is_volatile_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case WCD934X_INTR_PIN1_STATUS0...WCD934X_INTR_PIN2_CLEAR3:
+ case WCD934X_SWR_AHB_BRIDGE_RD_DATA_0:
+ case WCD934X_SWR_AHB_BRIDGE_RD_DATA_1:
+ case WCD934X_SWR_AHB_BRIDGE_RD_DATA_2:
+ case WCD934X_SWR_AHB_BRIDGE_RD_DATA_3:
+ case WCD934X_SWR_AHB_BRIDGE_ACCESS_STATUS:
+ case WCD934X_ANA_MBHC_RESULT_3:
+ case WCD934X_ANA_MBHC_RESULT_2:
+ case WCD934X_ANA_MBHC_RESULT_1:
+ case WCD934X_ANA_MBHC_MECH:
+ case WCD934X_ANA_MBHC_ELECT:
+ case WCD934X_ANA_MBHC_ZDET:
+ case WCD934X_ANA_MICB2:
+ case WCD934X_ANA_RCO:
+ case WCD934X_ANA_BIAS:
+ return true;
+ default:
+ return false;
+ }
+};
+
+static const struct regmap_range_cfg wcd934x_ranges[] = {
+ { .name = "WCD934X",
+ .range_min = 0x0,
+ .range_max = WCD934X_MAX_REGISTER,
+ .selector_reg = WCD934X_SEL_REGISTER,
+ .selector_mask = WCD934X_SEL_MASK,
+ .selector_shift = WCD934X_SEL_SHIFT,
+ .window_start = WCD934X_WINDOW_START,
+ .window_len = WCD934X_WINDOW_LENGTH,
+ },
+};
+
+static struct regmap_config wcd934x_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .cache_type = REGCACHE_RBTREE,
+ .max_register = 0xffff,
+ .can_multi_write = true,
+ .ranges = wcd934x_ranges,
+ .num_ranges = ARRAY_SIZE(wcd934x_ranges),
+ .volatile_reg = wcd934x_is_volatile_register,
+};
+
+static int wcd934x_bring_up(struct wcd934x_ddata *ddata)
+{
+ struct regmap *regmap = ddata->regmap;
+ u16 id_minor, id_major;
+ int ret;
+
+ ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE0,
+ (u8 *)&id_minor, sizeof(u16));
+ if (ret)
+ return ret;
+
+ ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE2,
+ (u8 *)&id_major, sizeof(u16));
+ if (ret)
+ return ret;
+
+ dev_info(ddata->dev, "WCD934x chip id major 0x%x, minor 0x%x\n",
+ id_major, id_minor);
+
+ regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x01);
+ regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_A_STARTUP, 0x19);
+ regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_D_STARTUP, 0x15);
+ /* Add 1msec delay for VOUT to settle */
+ usleep_range(1000, 1100);
+ regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x5);
+ regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x7);
+ regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x3);
+ regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x7);
+ regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x3);
+
+ return 0;
+}
+
+static int wcd934x_slim_status_up(struct slim_device *sdev)
+{
+ struct device *dev = &sdev->dev;
+ struct wcd934x_ddata *ddata;
+ int ret;
+
+ ddata = dev_get_drvdata(dev);
+
+ ddata->regmap = regmap_init_slimbus(sdev, &wcd934x_regmap_config);
+ if (IS_ERR(ddata->regmap)) {
+ dev_err(dev, "Error allocating slim regmap\n");
+ return PTR_ERR(ddata->regmap);
+ }
+
+ ret = wcd934x_bring_up(ddata);
+ if (ret) {
+ dev_err(dev, "Failed to bring up WCD934X: err = %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq,
+ IRQF_TRIGGER_HIGH, 0,
+ &wcd934x_regmap_irq_chip,
+ &ddata->irq_data);
+ if (ret) {
+ dev_err(dev, "Failed to add IRQ chip: err = %d\n", ret);
+ return ret;
+ }
+
+ ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, wcd934x_devices,
+ ARRAY_SIZE(wcd934x_devices), NULL, 0, NULL);
+ if (ret) {
+ dev_err(dev, "Failed to add child devices: err = %d\n",
+ ret);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int wcd934x_slim_status(struct slim_device *sdev,
+ enum slim_device_status status)
+{
+ switch (status) {
+ case SLIM_DEVICE_STATUS_UP:
+ return wcd934x_slim_status_up(sdev);
+ case SLIM_DEVICE_STATUS_DOWN:
+ mfd_remove_devices(&sdev->dev);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int wcd934x_slim_probe(struct slim_device *sdev)
+{
+ struct device *dev = &sdev->dev;
+ struct device_node *np = dev->of_node;
+ struct wcd934x_ddata *ddata;
+ struct gpio_desc *reset_gpio;
+ int ret;
+
+ ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ ddata->irq = of_irq_get(np, 0);
+ if (ddata->irq < 0)
+ return dev_err_probe(ddata->dev, ddata->irq,
+ "Failed to get IRQ\n");
+
+ ddata->extclk = devm_clk_get(dev, "extclk");
+ if (IS_ERR(ddata->extclk))
+ return dev_err_probe(dev, PTR_ERR(ddata->extclk),
+ "Failed to get extclk");
+
+ ddata->supplies[0].supply = "vdd-buck";
+ ddata->supplies[1].supply = "vdd-buck-sido";
+ ddata->supplies[2].supply = "vdd-tx";
+ ddata->supplies[3].supply = "vdd-rx";
+ ddata->supplies[4].supply = "vdd-io";
+
+ ret = regulator_bulk_get(dev, WCD934X_MAX_SUPPLY, ddata->supplies);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to get supplies\n");
+
+ ret = regulator_bulk_enable(WCD934X_MAX_SUPPLY, ddata->supplies);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to enable supplies\n");
+
+ /*
+ * For WCD934X, it takes about 600us for the Vout_A and
+ * Vout_D to be ready after BUCK_SIDO is powered up.
+ * SYS_RST_N shouldn't be pulled high during this time
+ */
+ usleep_range(600, 650);
+ reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(reset_gpio)) {
+ ret = dev_err_probe(dev, PTR_ERR(reset_gpio),
+ "Failed to get reset gpio\n");
+ goto err_disable_regulators;
+ }
+ msleep(20);
+ gpiod_set_value(reset_gpio, 1);
+ msleep(20);
+
+ ddata->dev = dev;
+ dev_set_drvdata(dev, ddata);
+
+ return 0;
+
+err_disable_regulators:
+ regulator_bulk_disable(WCD934X_MAX_SUPPLY, ddata->supplies);
+ return ret;
+}
+
+static void wcd934x_slim_remove(struct slim_device *sdev)
+{
+ struct wcd934x_ddata *ddata = dev_get_drvdata(&sdev->dev);
+
+ regulator_bulk_disable(WCD934X_MAX_SUPPLY, ddata->supplies);
+ mfd_remove_devices(&sdev->dev);
+}
+
+static const struct slim_device_id wcd934x_slim_id[] = {
+ { SLIM_MANF_ID_QCOM, SLIM_PROD_CODE_WCD9340,
+ SLIM_DEV_IDX_WCD9340, SLIM_DEV_INSTANCE_ID_WCD9340 },
+ {}
+};
+
+static struct slim_driver wcd934x_slim_driver = {
+ .driver = {
+ .name = "wcd934x-slim",
+ },
+ .probe = wcd934x_slim_probe,
+ .remove = wcd934x_slim_remove,
+ .device_status = wcd934x_slim_status,
+ .id_table = wcd934x_slim_id,
+};
+
+module_slim_driver(wcd934x_slim_driver);
+MODULE_DESCRIPTION("WCD934X slim driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("slim:217:250:*");
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");