From 893b99d907b85109c8cf8b00f381f36939f5ae3c Mon Sep 17 00:00:00 2001
From: Pete Johanson <peter@peterjohanson.com>
Date: Fri, 17 Jul 2020 22:43:19 -0400
Subject: Initial en11 exploration.

---
 app/drivers/zephyr/en11.c | 110 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 app/drivers/zephyr/en11.c

(limited to 'app/drivers/zephyr/en11.c')

diff --git a/app/drivers/zephyr/en11.c b/app/drivers/zephyr/en11.c
new file mode 100644
index 0000000..e6c6b74
--- /dev/null
+++ b/app/drivers/zephyr/en11.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2020 Peter Johanson
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#define DT_DRV_COMPAT alps_en11
+
+#include <device.h>
+#include <drivers/gpio.h>
+#include <sys/util.h>
+#include <kernel.h>
+#include <drivers/sensor.h>
+#include <sys/__assert.h>
+#include <logging/log.h>
+
+#include "en11.h"
+
+LOG_MODULE_REGISTER(EN11, CONFIG_SENSOR_LOG_LEVEL);
+
+static int en11_sample_fetch(struct device *dev, enum sensor_channel chan)
+{
+	struct en11_data *drv_data = dev->driver_data;
+	u16_t val;
+
+	__ASSERT_NO_MSG(chan == SENSOR_CHAN_ALL || chan == SENSOR_CHAN_AMBIENT_TEMP);
+
+	// if (en11_reg_read(drv_data, EN11_REG_TOBJ, &val) < 0) {
+	// 	return -EIO;
+	// }
+
+	// if (val & EN11_DATA_INVALID_BIT) {
+	// 	return -EIO;
+	// }
+
+	// drv_data->sample = arithmetic_shift_right((s16_t)val, 2);
+
+	return 0;
+}
+
+static int en11_channel_get(struct device *dev,
+			       enum sensor_channel chan,
+			       struct sensor_value *val)
+{
+	struct en11_data *drv_data = dev->driver_data;
+	// s32_t uval;
+
+	// if (chan != SENSOR_CHAN_AMBIENT_TEMP) {
+	// 	return -ENOTSUP;
+	// }
+
+	// uval = (s32_t)drv_data->sample * EN11_TEMP_SCALE;
+	// val->val1 = uval / 1000000;
+	// val->val2 = uval % 1000000;
+
+	return 0;
+}
+
+static const struct sensor_driver_api en11_driver_api = {
+#ifdef CONFIG_EN11_TRIGGER
+	.trigger_set = en11_trigger_set,
+#endif
+	.sample_fetch = en11_sample_fetch,
+	.channel_get = en11_channel_get,
+};
+
+int en11_init(struct device *dev)
+{
+	struct en11_data *drv_data = dev->driver_data;
+	const struct en11_config *drv_cfg = dev->config_info;
+
+	LOG_DBG("");
+
+	drv_data->a = device_get_binding(drv_cfg->a_label);
+	if (drv_data->a == NULL) {
+		LOG_ERR("Failed to get pointer to A GPIO device");
+		return -EINVAL;
+	}
+
+	drv_data->b = device_get_binding(drv_cfg->b_label);
+	if (drv_data->b == NULL) {
+		LOG_ERR("Failed to get pointer to B GPIO device");
+		return -EINVAL;
+	}
+
+#ifdef CONFIG_EN11_TRIGGER
+	if (en11_init_interrupt(dev) < 0) {
+		LOG_DBG("Failed to initialize interrupt!");
+		return -EIO;
+	}
+#endif
+
+	return 0;
+}
+
+struct en11_data en11_data;
+
+const struct en11_config en11_cfg = {
+	.a_label = DT_INST_GPIO_LABEL(0, a_gpios),
+	.a_pin = DT_INST_GPIO_PIN(0, a_gpios),
+	.a_flags = DT_INST_GPIO_FLAGS(0, a_gpios),
+	.b_label = DT_INST_GPIO_LABEL(0, b_gpios),
+	.b_pin = DT_INST_GPIO_PIN(0, b_gpios),
+	.b_flags = DT_INST_GPIO_FLAGS(0, b_gpios),
+};
+
+DEVICE_AND_API_INIT(en11, DT_INST_LABEL(0), en11_init,
+		    &en11_data,
+		    &en11_cfg, POST_KERNEL, CONFIG_SENSOR_INIT_PRIORITY,
+		    &en11_driver_api);
-- 
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