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-rw-r--r--drivers/mfd/Kconfig7
-rw-r--r--drivers/mfd/Makefile2
-rw-r--r--drivers/mfd/spk-id.c209
3 files changed, 218 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3087618b1b26..344626e3b0fa 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1616,3 +1616,10 @@ config MFD_VEXPRESS_SYSREG
endmenu
endif
+
+config XIAOMI_SPK_ID
+ bool "Xiaomi Speaker ID"
+ depends on MACH_XIAOMI_SDM660
+ default n
+ help
+ Xiaomi Speaker ID platform driver
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index ff82ba49d70b..bc4be968ed50 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -81,6 +81,8 @@ obj-$(CONFIG_TWL4030_POWER) += twl4030-power.o
obj-$(CONFIG_MFD_TWL4030_AUDIO) += twl4030-audio.o
obj-$(CONFIG_TWL6040_CORE) += twl6040.o
+obj-$(CONFIG_XIAOMI_SPK_ID) += spk-id.o
+
obj-$(CONFIG_MFD_MC13XXX) += mc13xxx-core.o
obj-$(CONFIG_MFD_MC13XXX_SPI) += mc13xxx-spi.o
obj-$(CONFIG_MFD_MC13XXX_I2C) += mc13xxx-i2c.o
diff --git a/drivers/mfd/spk-id.c b/drivers/mfd/spk-id.c
new file mode 100644
index 000000000000..be041ba468f7
--- /dev/null
+++ b/drivers/mfd/spk-id.c
@@ -0,0 +1,209 @@
+/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2019 XiaoMi, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#define DEBUG
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/delay.h>
+#include <linux/mfd/spk-id.h>
+
+
+struct spk_id_info {
+ struct pinctrl *pinctrl;
+ struct pinctrl_state *pull_down;
+ struct pinctrl_state *pull_up;
+ struct pinctrl_state *no_pull;
+ int gpio;
+ int state;
+};
+
+
+static struct spk_id_info *spk_id_get_info(struct device_node *np)
+{
+ struct platform_device *pdev;
+ struct spk_id_info *info;
+
+ if (!np) {
+ pr_err("%s: device node is null\n", __func__);
+ return NULL;
+ }
+
+ pdev = of_find_device_by_node(np);
+ if (!pdev) {
+ pr_err("%s: platform device not found!\n", __func__);
+ return NULL;
+ }
+
+ info = dev_get_drvdata(&pdev->dev);
+ if (!info)
+ dev_err(&pdev->dev, "%s: cannot find spk id info\n", __func__);
+
+ return info;
+}
+
+int spk_id_get_pin_3state(struct device_node *np)
+{
+ struct spk_id_info *info;
+ int pu = 0;
+ int pd = 0;
+
+ info = spk_id_get_info(np);
+ if (!info)
+ return -EINVAL;
+
+ if (IS_ERR_OR_NULL(info->pinctrl)) {
+ pr_err("%s: pin ctrl is invalid:%ld\n", __func__, PTR_ERR(info->pinctrl));
+ return -EINVAL;
+ }
+
+ if (!gpio_is_valid(info->gpio)) {
+ pr_err("%s: gpio is invalid:%d\n", __func__, info->gpio);
+ return -EINVAL;
+ }
+
+ pinctrl_select_state(info->pinctrl, info->pull_down);
+ msleep(3);
+ pd = gpio_get_value(info->gpio);
+
+ pinctrl_select_state(info->pinctrl, info->pull_up);
+ msleep(3);
+ pu = gpio_get_value(info->gpio);
+
+
+ if ((pd == pu) && (pd == 0)) {
+ pr_info("%s: id pin%d = %d\n", __func__, info->gpio, pd);
+ pinctrl_select_state(info->pinctrl, info->pull_down);
+ info->state = PIN_PULL_DOWN;
+ } else if ((pd == pu) && (pd == 1)) {
+ pr_info("%s: id pin%d = %d\n", __func__, info->gpio, pd);
+ pinctrl_select_state(info->pinctrl, info->pull_up);
+ info->state = PIN_PULL_UP;
+ } else {
+ pr_info("%s: id pin%d = 2\n", __func__, info->gpio);
+ pinctrl_select_state(info->pinctrl, info->no_pull);
+ info->state = PIN_FLOAT;
+ }
+
+ return info->state;
+}
+EXPORT_SYMBOL(spk_id_get_pin_3state);
+
+static int spk_id_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct spk_id_info *info;
+
+ info = devm_kzalloc(&pdev->dev,
+ sizeof(struct spk_id_info),
+ GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ dev_dbg(&pdev->dev, "%s: device %s\n", __func__, pdev->name);
+ info->pinctrl = devm_pinctrl_get(&pdev->dev);
+ if (IS_ERR_OR_NULL(info->pinctrl)) {
+ dev_err(&pdev->dev, "%s: Cannot get speaker id gpio pinctrl:%ld\n",
+ __func__, PTR_ERR(info->pinctrl));
+ ret = PTR_ERR(info->pinctrl);
+ goto err_pctrl_get;
+ }
+
+ info->pull_down = pinctrl_lookup_state(
+ info->pinctrl, "pull_down");
+ if (IS_ERR_OR_NULL(info->pull_down)) {
+ dev_err(&pdev->dev, "%s: Cannot get pull_down pinctrl state:%ld\n",
+ __func__, PTR_ERR(info->pull_down));
+ ret = PTR_ERR(info->pull_down);
+ goto err_lookup_state;
+ }
+
+ info->pull_up = pinctrl_lookup_state(
+ info->pinctrl, "pull_up");
+ if (IS_ERR_OR_NULL(info->pull_up)) {
+ dev_err(&pdev->dev, "%s: Cannot get pull_up pinctrl state:%ld\n",
+ __func__, PTR_ERR(info->pull_up));
+ ret = PTR_ERR(info->pull_up);
+ goto err_lookup_state;
+ }
+
+ info->no_pull = pinctrl_lookup_state(
+ info->pinctrl, "no_pull");
+ if (IS_ERR_OR_NULL(info->no_pull)) {
+ dev_err(&pdev->dev, "%s: Cannot get no_pull pinctrl state:%ld\n",
+ __func__, PTR_ERR(info->no_pull));
+ ret = PTR_ERR(info->no_pull);
+ goto err_lookup_state;
+ }
+
+ info->gpio = of_get_named_gpio(pdev->dev.of_node,
+ "audio,speaker-id-gpio", 0);
+ if (gpio_is_valid(info->gpio)) {
+ ret = gpio_request(info->gpio, "speaker-id");
+ if (ret) {
+ dev_err(&pdev->dev, "%s: Failed to request gpio %d\n",
+ __func__, info->gpio);
+ goto err_lookup_state;
+ }
+ }
+
+ dev_set_drvdata(&pdev->dev, info);
+ return 0;
+
+err_lookup_state:
+ devm_pinctrl_put(info->pinctrl);
+err_pctrl_get:
+ devm_kfree(&pdev->dev, info);
+ return ret;
+}
+
+static int spk_id_remove(struct platform_device *pdev)
+{
+ struct spk_id_info *info;
+
+ info = dev_get_drvdata(&pdev->dev);
+
+ if (info) {
+ if (info->pinctrl)
+ devm_pinctrl_put(info->pinctrl);
+ if (gpio_is_valid(info->gpio))
+ gpio_free(info->gpio);
+ }
+
+ devm_kfree(&pdev->dev, info);
+ return 0;
+}
+
+static const struct of_device_id spk_id_match[] = {
+ {.compatible = "audio,speaker-id"},
+ {}
+};
+
+static struct platform_driver spk_id_driver = {
+ .driver = {
+ .name = "spk-id",
+ .owner = THIS_MODULE,
+ .of_match_table = spk_id_match,
+ },
+ .probe = spk_id_probe,
+ .remove = spk_id_remove,
+};
+module_platform_driver(spk_id_driver);
+
+MODULE_DESCRIPTION("Speaker ID platform driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-28 21:38:04 +0000