From e56a17a78f778d92e7d60717893fe9e81b65869a Mon Sep 17 00:00:00 2001
From: Jesse Gilles <jgilles@multitech.com>
Date: Wed, 4 Jan 2012 16:51:48 -0600
Subject: add daughter card reset (ndc-reset)
---
io-module/mts_io.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 88 insertions(+)
(limited to 'io-module/mts_io.c')
diff --git a/io-module/mts_io.c b/io-module/mts_io.c
index fe7fcaf..c62b534 100644
--- a/io-module/mts_io.c
+++ b/io-module/mts_io.c
@@ -260,6 +260,13 @@ static struct gpio_pin gpio_pins_mtcdp_1_0[] = {
.use_pullup = 0,
},
#endif
+ {
+ .name = "NDC_RESET",
+ .pin = AT91_PIN_PB21,
+ .direction = GPIO_DIR_OUTPUT,
+ .output_value = 1,
+ .use_pullup = 0,
+ },
{ },
};
@@ -604,6 +611,27 @@ static int radio_reset(void)
return ret;
}
+static int ndc_reset(void)
+{
+ int ret;
+ struct gpio_pin *pin = gpio_pin_by_name("NDC_RESET");
+
+ if (!pin) {
+ return -ENODEV;
+ }
+
+ ret = at91_set_gpio_value(pin->pin, 0);
+ if (ret) {
+ return ret;
+ }
+
+ mdelay(1);
+
+ ret = at91_set_gpio_value(pin->pin, 1);
+
+ return ret;
+}
+
static int ADT7302_to_celsius(int value)
{
if (value & 0x2000) {
@@ -692,6 +720,65 @@ static struct device_attribute dev_attr_radio_reset = {
.store = mts_attr_store_radio_reset,
};
+static ssize_t mts_attr_show_ndc_reset(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int value;
+ struct gpio_pin *pin = gpio_pin_by_name("NDC_RESET");
+
+ if (!pin) {
+ return -ENODEV;
+ }
+
+ mutex_lock(&mts_io_mutex);
+
+ value = at91_get_gpio_value(pin->pin);
+
+ mutex_unlock(&mts_io_mutex);
+
+ if (value < 0) {
+ return value;
+ }
+
+ return sprintf(buf, "%d\n", value);
+}
+
+static ssize_t mts_attr_store_ndc_reset(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ int value;
+ int err;
+
+ if (sscanf(buf, "%i", &value) != 1) {
+ return -EINVAL;
+ }
+ if (value != 0) {
+ return -EINVAL;
+ }
+
+ mutex_lock(&mts_io_mutex);
+
+ err = ndc_reset();
+
+ mutex_unlock(&mts_io_mutex);
+
+ if (err) {
+ return err;
+ }
+
+ return count;
+}
+
+static struct device_attribute dev_attr_ndc_reset = {
+ .attr = {
+ .name = "ndc-reset",
+ .mode = MTS_ATTR_MODE_RW,
+ },
+ .show = mts_attr_show_ndc_reset,
+ .store = mts_attr_store_ndc_reset,
+};
+
static ssize_t mts_attr_show_eth0_enabled(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -2202,6 +2289,7 @@ static struct attribute *platform_attributes[] = {
&dev_attr_reset.attr,
&dev_attr_reset_monitor.attr,
&dev_attr_radio_reset.attr,
+ &dev_attr_ndc_reset.attr,
&dev_attr_eth0_enabled.attr,
&dev_attr_extserial_dtr.attr,
&dev_attr_led_ls.attr,
--
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