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Diffstat (limited to 'target/linux/brcm2708/patches-3.18/0068-lirc-rpi-Add-device-tree-support-and-a-suitable-over.patch')
-rwxr-xr-xtarget/linux/brcm2708/patches-3.18/0068-lirc-rpi-Add-device-tree-support-and-a-suitable-over.patch299
1 files changed, 299 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-3.18/0068-lirc-rpi-Add-device-tree-support-and-a-suitable-over.patch b/target/linux/brcm2708/patches-3.18/0068-lirc-rpi-Add-device-tree-support-and-a-suitable-over.patch
new file mode 100755
index 0000000000..5f6c784cb6
--- /dev/null
+++ b/target/linux/brcm2708/patches-3.18/0068-lirc-rpi-Add-device-tree-support-and-a-suitable-over.patch
@@ -0,0 +1,299 @@
+From f3c1830096661e270f11f2a33ffb7274f50c90a6 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Thu, 18 Dec 2014 16:48:32 +0000
+Subject: [PATCH 068/114] lirc-rpi: Add device tree support, and a suitable
+ overlay
+
+The overlay supports DT parameters that match the old module
+parameters, except that gpio_in_pull should be set using the
+strings "up", "down" or "off".
+
+lirc-rpi: Also support pinctrl-bcm2835 in non-DT mode
+---
+ arch/arm/boot/dts/lirc-rpi-overlay.dts | 57 ++++++++++++
+ drivers/staging/media/lirc/lirc_rpi.c | 154 +++++++++++++++++++++++++++------
+ 2 files changed, 183 insertions(+), 28 deletions(-)
+ create mode 100644 arch/arm/boot/dts/lirc-rpi-overlay.dts
+
+diff --git a/arch/arm/boot/dts/lirc-rpi-overlay.dts b/arch/arm/boot/dts/lirc-rpi-overlay.dts
+new file mode 100644
+index 0000000..7d5d82b
+--- /dev/null
++++ b/arch/arm/boot/dts/lirc-rpi-overlay.dts
+@@ -0,0 +1,57 @@
++// Definitions for lirc-rpi module
++/dts-v1/;
++/plugin/;
++
++/ {
++ compatible = "brcm,bcm2708";
++
++ fragment@0 {
++ target-path = "/";
++ __overlay__ {
++ lirc_rpi: lirc_rpi {
++ compatible = "rpi,lirc-rpi";
++ pinctrl-names = "default";
++ pinctrl-0 = <&lirc_pins>;
++ status = "okay";
++
++ // Override autodetection of IR receiver circuit
++ // (0 = active high, 1 = active low, -1 = no override )
++ rpi,sense = <0xffffffff>;
++
++ // Software carrier
++ // (0 = off, 1 = on)
++ rpi,softcarrier = <1>;
++
++ // Invert output
++ // (0 = off, 1 = on)
++ rpi,invert = <0>;
++
++ // Enable debugging messages
++ // (0 = off, 1 = on)
++ rpi,debug = <0>;
++ };
++ };
++ };
++
++ fragment@1 {
++ target = <&gpio>;
++ __overlay__ {
++ lirc_pins: lirc_pins {
++ brcm,pins = <17 18>;
++ brcm,function = <1 0>; // out in
++ brcm,pull = <0 1>; // off down
++ };
++ };
++ };
++
++ __overrides__ {
++ gpio_out_pin = <&lirc_pins>,"brcm,pins:0";
++ gpio_in_pin = <&lirc_pins>,"brcm,pins:4";
++ gpio_in_pull = <&lirc_pins>,"brcm,pull:4";
++
++ sense = <&lirc_rpi>,"rpi,sense:0";
++ softcarrier = <&lirc_rpi>,"rpi,softcarrier:0";
++ invert = <&lirc_rpi>,"rpi,invert:0";
++ debug = <&lirc_rpi>,"rpi,debug:0";
++ };
++};
+diff --git a/drivers/staging/media/lirc/lirc_rpi.c b/drivers/staging/media/lirc/lirc_rpi.c
+index c688364..cd66ca2 100644
+--- a/drivers/staging/media/lirc/lirc_rpi.c
++++ b/drivers/staging/media/lirc/lirc_rpi.c
+@@ -40,6 +40,7 @@
+ #include <media/lirc_dev.h>
+ #include <mach/gpio.h>
+ #include <linux/gpio.h>
++#include <linux/of_platform.h>
+
+ #include <linux/platform_data/bcm2708.h>
+
+@@ -295,32 +296,117 @@ static int is_right_chip(struct gpio_chip *chip, void *data)
+ return 0;
+ }
+
++static inline int read_bool_property(const struct device_node *np,
++ const char *propname,
++ bool *out_value)
++{
++ u32 value = 0;
++ int err = of_property_read_u32(np, propname, &value);
++ if (err == 0)
++ *out_value = (value != 0);
++ return err;
++}
++
++static void read_pin_settings(struct device_node *node)
++{
++ u32 pin;
++ int index;
++
++ for (index = 0;
++ of_property_read_u32_index(
++ node,
++ "brcm,pins",
++ index,
++ &pin) == 0;
++ index++) {
++ u32 function;
++ int err;
++ err = of_property_read_u32_index(
++ node,
++ "brcm,function",
++ index,
++ &function);
++ if (err == 0) {
++ if (function == 1) /* Output */
++ gpio_out_pin = pin;
++ else if (function == 0) /* Input */
++ gpio_in_pin = pin;
++ }
++ }
++}
++
+ static int init_port(void)
+ {
+ int i, nlow, nhigh, ret;
++ struct device_node *node;
++
++ node = lirc_rpi_dev->dev.of_node;
+
+ gpiochip = gpiochip_find("bcm2708_gpio", is_right_chip);
+
+- if (!gpiochip)
++ /*
++ * Because of the lack of a setpull function, only support
++ * pinctrl-bcm2835 if using device tree.
++ */
++ if (!gpiochip && node)
++ gpiochip = gpiochip_find("pinctrl-bcm2835", is_right_chip);
++
++ if (!gpiochip) {
++ pr_err(LIRC_DRIVER_NAME ": gpio chip not found!\n");
+ return -ENODEV;
++ }
++
++ if (node) {
++ struct device_node *pins_node;
++
++ pins_node = of_parse_phandle(node, "pinctrl-0", 0);
++ if (!pins_node) {
++ printk(KERN_ERR LIRC_DRIVER_NAME
++ ": pinctrl settings not found!\n");
++ ret = -EINVAL;
++ goto exit_init_port;
++ }
++
++ read_pin_settings(pins_node);
++
++ of_property_read_u32(node, "rpi,sense", &sense);
++
++ read_bool_property(node, "rpi,softcarrier", &softcarrier);
++
++ read_bool_property(node, "rpi,invert", &invert);
++
++ read_bool_property(node, "rpi,debug", &debug);
+
+- if (gpio_request(gpio_out_pin, LIRC_DRIVER_NAME " ir/out")) {
+- printk(KERN_ALERT LIRC_DRIVER_NAME
+- ": cant claim gpio pin %d\n", gpio_out_pin);
+- ret = -ENODEV;
+- goto exit_init_port;
+ }
++ else
++ {
++ if (gpio_in_pin >= BCM2708_NR_GPIOS ||
++ gpio_out_pin >= BCM2708_NR_GPIOS) {
++ ret = -EINVAL;
++ printk(KERN_ERR LIRC_DRIVER_NAME
++ ": invalid GPIO pin(s) specified!\n");
++ goto exit_init_port;
++ }
+
+- if (gpio_request(gpio_in_pin, LIRC_DRIVER_NAME " ir/in")) {
+- printk(KERN_ALERT LIRC_DRIVER_NAME
+- ": cant claim gpio pin %d\n", gpio_in_pin);
+- ret = -ENODEV;
+- goto exit_gpio_free_out_pin;
++ if (gpio_request(gpio_out_pin, LIRC_DRIVER_NAME " ir/out")) {
++ printk(KERN_ALERT LIRC_DRIVER_NAME
++ ": cant claim gpio pin %d\n", gpio_out_pin);
++ ret = -ENODEV;
++ goto exit_init_port;
++ }
++
++ if (gpio_request(gpio_in_pin, LIRC_DRIVER_NAME " ir/in")) {
++ printk(KERN_ALERT LIRC_DRIVER_NAME
++ ": cant claim gpio pin %d\n", gpio_in_pin);
++ ret = -ENODEV;
++ goto exit_gpio_free_out_pin;
++ }
++
++ bcm2708_gpio_setpull(gpiochip, gpio_in_pin, gpio_in_pull);
++ gpiochip->direction_input(gpiochip, gpio_in_pin);
++ gpiochip->direction_output(gpiochip, gpio_out_pin, 1);
+ }
+
+- bcm2708_gpio_setpull(gpiochip, gpio_in_pin, gpio_in_pull);
+- gpiochip->direction_input(gpiochip, gpio_in_pin);
+- gpiochip->direction_output(gpiochip, gpio_out_pin, 1);
+ gpiochip->set(gpiochip, gpio_out_pin, invert);
+
+ irq_num = gpiochip->to_irq(gpiochip, gpio_in_pin);
+@@ -514,15 +600,23 @@ static struct lirc_driver driver = {
+ .owner = THIS_MODULE,
+ };
+
++static const struct of_device_id lirc_rpi_of_match[] = {
++ { .compatible = "rpi,lirc-rpi", },
++ {},
++};
++MODULE_DEVICE_TABLE(of, lirc_rpi_of_match);
++
+ static struct platform_driver lirc_rpi_driver = {
+ .driver = {
+ .name = LIRC_DRIVER_NAME,
+ .owner = THIS_MODULE,
++ .of_match_table = of_match_ptr(lirc_rpi_of_match),
+ },
+ };
+
+ static int __init lirc_rpi_init(void)
+ {
++ struct device_node *node;
+ int result;
+
+ /* Init read buffer. */
+@@ -537,15 +631,26 @@ static int __init lirc_rpi_init(void)
+ goto exit_buffer_free;
+ }
+
+- lirc_rpi_dev = platform_device_alloc(LIRC_DRIVER_NAME, 0);
+- if (!lirc_rpi_dev) {
+- result = -ENOMEM;
+- goto exit_driver_unregister;
++ node = of_find_compatible_node(NULL, NULL,
++ lirc_rpi_of_match[0].compatible);
++
++ if (node) {
++ /* DT-enabled */
++ lirc_rpi_dev = of_find_device_by_node(node);
++ WARN_ON(lirc_rpi_dev->dev.of_node != node);
++ of_node_put(node);
+ }
++ else {
++ lirc_rpi_dev = platform_device_alloc(LIRC_DRIVER_NAME, 0);
++ if (!lirc_rpi_dev) {
++ result = -ENOMEM;
++ goto exit_driver_unregister;
++ }
+
+- result = platform_device_add(lirc_rpi_dev);
+- if (result)
+- goto exit_device_put;
++ result = platform_device_add(lirc_rpi_dev);
++ if (result)
++ goto exit_device_put;
++ }
+
+ return 0;
+
+@@ -577,13 +682,6 @@ static int __init lirc_rpi_init_module(void)
+ if (result)
+ return result;
+
+- if (gpio_in_pin >= BCM2708_NR_GPIOS || gpio_out_pin >= BCM2708_NR_GPIOS) {
+- result = -EINVAL;
+- printk(KERN_ERR LIRC_DRIVER_NAME
+- ": invalid GPIO pin(s) specified!\n");
+- goto exit_rpi;
+- }
+-
+ result = init_port();
+ if (result < 0)
+ goto exit_rpi;
+--
+1.8.3.2
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-15 05:17:18 +0000