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Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0058-enabling-the-realtime-clock-1-wire-chip-DS1307-and-1.patch')
-rw-r--r--target/linux/brcm2708/patches-4.14/950-0058-enabling-the-realtime-clock-1-wire-chip-DS1307-and-1.patch221
1 files changed, 0 insertions, 221 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0058-enabling-the-realtime-clock-1-wire-chip-DS1307-and-1.patch b/target/linux/brcm2708/patches-4.14/950-0058-enabling-the-realtime-clock-1-wire-chip-DS1307-and-1.patch
deleted file mode 100644
index d434102061..0000000000
--- a/target/linux/brcm2708/patches-4.14/950-0058-enabling-the-realtime-clock-1-wire-chip-DS1307-and-1.patch
+++ /dev/null
@@ -1,221 +0,0 @@
-From dc2d8a486db8a21cd998b0bdb117d30b8034aceb Mon Sep 17 00:00:00 2001
-From: popcornmix <popcornmix@gmail.com>
-Date: Wed, 8 May 2013 11:46:50 +0100
-Subject: [PATCH 058/454] enabling the realtime clock 1-wire chip DS1307 and
- 1-wire on GPIO4 (as a module)
-
-1-wire: Add support for configuring pin for w1-gpio kernel module
-See: https://github.com/raspberrypi/linux/pull/457
-
-Add bitbanging pullups, use them for w1-gpio
-
-Allows parasite power to work, uses module option pullup=1
-
-bcm2708: Ensure 1-wire pullup is disabled by default, and expose as module parameter
-
-Signed-off-by: Alex J Lennon <ajlennon@dynamicdevices.co.uk>
-
-w1-gpio: Add gpiopin module parameter and correctly free up gpio pull-up pin, if set
-
-Signed-off-by: Alex J Lennon <ajlennon@dynamicdevices.co.uk>
-
-w1-gpio: Sort out the pullup/parasitic power tangle
----
- drivers/w1/masters/w1-gpio.c | 69 ++++++++++++++++++++++++++++++++----
- drivers/w1/w1_int.c | 14 ++++++++
- drivers/w1/w1_io.c | 18 ++++++++--
- include/linux/w1-gpio.h | 1 +
- include/linux/w1.h | 6 ++++
- 5 files changed, 99 insertions(+), 9 deletions(-)
-
---- a/drivers/w1/masters/w1-gpio.c
-+++ b/drivers/w1/masters/w1-gpio.c
-@@ -22,6 +22,19 @@
-
- #include <linux/w1.h>
-
-+static int w1_gpio_pullup = 0;
-+static int w1_gpio_pullup_orig = 0;
-+module_param_named(pullup, w1_gpio_pullup, int, 0);
-+MODULE_PARM_DESC(pullup, "Enable parasitic power (power on data) mode");
-+static int w1_gpio_pullup_pin = -1;
-+static int w1_gpio_pullup_pin_orig = -1;
-+module_param_named(extpullup, w1_gpio_pullup_pin, int, 0);
-+MODULE_PARM_DESC(extpullup, "GPIO external pullup pin number");
-+static int w1_gpio_pin = -1;
-+static int w1_gpio_pin_orig = -1;
-+module_param_named(gpiopin, w1_gpio_pin, int, 0);
-+MODULE_PARM_DESC(gpiopin, "GPIO pin number");
-+
- static u8 w1_gpio_set_pullup(void *data, int delay)
- {
- struct w1_gpio_platform_data *pdata = data;
-@@ -66,6 +79,16 @@ static u8 w1_gpio_read_bit(void *data)
- return gpio_get_value(pdata->pin) ? 1 : 0;
- }
-
-+static void w1_gpio_bitbang_pullup(void *data, u8 on)
-+{
-+ struct w1_gpio_platform_data *pdata = data;
-+
-+ if (on)
-+ gpio_direction_output(pdata->pin, 1);
-+ else
-+ gpio_direction_input(pdata->pin);
-+}
-+
- #if defined(CONFIG_OF)
- static const struct of_device_id w1_gpio_dt_ids[] = {
- { .compatible = "w1-gpio" },
-@@ -79,6 +102,7 @@ static int w1_gpio_probe_dt(struct platf
- struct w1_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
- struct device_node *np = pdev->dev.of_node;
- int gpio;
-+ u32 value;
-
- pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
- if (!pdata)
-@@ -87,6 +111,9 @@ static int w1_gpio_probe_dt(struct platf
- if (of_get_property(np, "linux,open-drain", NULL))
- pdata->is_open_drain = 1;
-
-+ if (of_property_read_u32(np, "rpi,parasitic-power", &value) == 0)
-+ pdata->parasitic_power = (value != 0);
-+
- gpio = of_get_gpio(np, 0);
- if (gpio < 0) {
- if (gpio != -EPROBE_DEFER)
-@@ -102,7 +129,7 @@ static int w1_gpio_probe_dt(struct platf
- if (gpio == -EPROBE_DEFER)
- return gpio;
- /* ignore other errors as the pullup gpio is optional */
-- pdata->ext_pullup_enable_pin = gpio;
-+ pdata->ext_pullup_enable_pin = (gpio >= 0) ? gpio : -1;
-
- pdev->dev.platform_data = pdata;
-
-@@ -134,6 +161,22 @@ static int w1_gpio_probe(struct platform
- return -ENOMEM;
- }
-
-+ w1_gpio_pin_orig = pdata->pin;
-+ w1_gpio_pullup_pin_orig = pdata->ext_pullup_enable_pin;
-+ w1_gpio_pullup_orig = pdata->parasitic_power;
-+
-+ if(gpio_is_valid(w1_gpio_pin)) {
-+ pdata->pin = w1_gpio_pin;
-+ pdata->ext_pullup_enable_pin = -1;
-+ pdata->parasitic_power = -1;
-+ }
-+ pdata->parasitic_power |= w1_gpio_pullup;
-+ if(gpio_is_valid(w1_gpio_pullup_pin)) {
-+ pdata->ext_pullup_enable_pin = w1_gpio_pullup_pin;
-+ }
-+
-+ dev_info(&pdev->dev, "gpio pin %d, external pullup pin %d, parasitic power %d\n", pdata->pin, pdata->ext_pullup_enable_pin, pdata->parasitic_power);
-+
- err = devm_gpio_request(&pdev->dev, pdata->pin, "w1");
- if (err) {
- dev_err(&pdev->dev, "gpio_request (pin) failed\n");
-@@ -163,6 +206,14 @@ static int w1_gpio_probe(struct platform
- master->set_pullup = w1_gpio_set_pullup;
- }
-
-+ if (pdata->parasitic_power) {
-+ if (pdata->is_open_drain)
-+ printk(KERN_ERR "w1-gpio 'pullup'(parasitic power) "
-+ "option doesn't work with open drain GPIO\n");
-+ else
-+ master->bitbang_pullup = w1_gpio_bitbang_pullup;
-+ }
-+
- err = w1_add_master_device(master);
- if (err) {
- dev_err(&pdev->dev, "w1_add_master device failed\n");
-@@ -193,6 +244,10 @@ static int w1_gpio_remove(struct platfor
-
- w1_remove_master_device(master);
-
-+ pdata->pin = w1_gpio_pin_orig;
-+ pdata->ext_pullup_enable_pin = w1_gpio_pullup_pin_orig;
-+ pdata->parasitic_power = w1_gpio_pullup_orig;
-+
- return 0;
- }
-
---- a/drivers/w1/w1_int.c
-+++ b/drivers/w1/w1_int.c
-@@ -114,6 +114,20 @@ int w1_add_master_device(struct w1_bus_m
- return(-EINVAL);
- }
-
-+ /* bitbanging hardware uses bitbang_pullup, other hardware uses set_pullup
-+ * and takes care of timing itself */
-+ if (!master->write_byte && !master->touch_bit && master->set_pullup) {
-+ printk(KERN_ERR "w1_add_master_device: set_pullup requires "
-+ "write_byte or touch_bit, disabling\n");
-+ master->set_pullup = NULL;
-+ }
-+
-+ if (master->set_pullup && master->bitbang_pullup) {
-+ printk(KERN_ERR "w1_add_master_device: set_pullup should not "
-+ "be set when bitbang_pullup is used, disabling\n");
-+ master->set_pullup = NULL;
-+ }
-+
- /* Lock until the device is added (or not) to w1_masters. */
- mutex_lock(&w1_mlock);
- /* Search for the first available id (starting at 1). */
---- a/drivers/w1/w1_io.c
-+++ b/drivers/w1/w1_io.c
-@@ -126,10 +126,22 @@ static void w1_pre_write(struct w1_maste
- static void w1_post_write(struct w1_master *dev)
- {
- if (dev->pullup_duration) {
-- if (dev->enable_pullup && dev->bus_master->set_pullup)
-- dev->bus_master->set_pullup(dev->bus_master->data, 0);
-- else
-+ if (dev->enable_pullup) {
-+ if (dev->bus_master->set_pullup) {
-+ dev->bus_master->set_pullup(dev->
-+ bus_master->data,
-+ 0);
-+ } else if (dev->bus_master->bitbang_pullup) {
-+ dev->bus_master->
-+ bitbang_pullup(dev->bus_master->data, 1);
- msleep(dev->pullup_duration);
-+ dev->bus_master->
-+ bitbang_pullup(dev->bus_master->data, 0);
-+ }
-+ } else {
-+ msleep(dev->pullup_duration);
-+ }
-+
- dev->pullup_duration = 0;
- }
- }
---- a/include/linux/w1-gpio.h
-+++ b/include/linux/w1-gpio.h
-@@ -18,6 +18,7 @@
- struct w1_gpio_platform_data {
- unsigned int pin;
- unsigned int is_open_drain:1;
-+ unsigned int parasitic_power:1;
- void (*enable_external_pullup)(int enable);
- unsigned int ext_pullup_enable_pin;
- unsigned int pullup_duration;
---- a/include/linux/w1.h
-+++ b/include/linux/w1.h
-@@ -157,6 +157,12 @@ struct w1_bus_master {
-
- u8 (*set_pullup)(void *, int);
-
-+ /**
-+ * Turns the pullup on/off in bitbanging mode, takes an on/off argument.
-+ * @return -1=Error, 0=completed
-+ */
-+ void (*bitbang_pullup) (void *, u8);
-+
- void (*search)(void *, struct w1_master *,
- u8, w1_slave_found_callback);
- };
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 15:55:30 +0000