ath25: add back target support

Discussion on the mailing list reveals that this target has active
users. As we are finally able to upgrade this target to kernel 5.4,
add it back to master.

This reverts commit 7d29a5571403 ("ath25: drop target") and
immediately moves the relevant files to 5.4, without touching
the content.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 116 insertions, 0 deletions

diff --git a/target/linux/ath25/patches-5.4/330-board_leds.patch b/target/linux/ath25/patches-5.4/330-board_leds.patch
new file mode 100644
index 0000000000..e357fc6a64
--- /dev/null
+++ b/target/linux/ath25/patches-5.4/330-board_leds.patch
@@ -0,0 +1,116 @@
+--- a/arch/mips/ath25/ar2315.c
++++ b/arch/mips/ath25/ar2315.c
+@@ -23,6 +23,7 @@
+ #include <linux/reboot.h>
+ #include <linux/delay.h>
+ #include <linux/gpio.h>
++#include <linux/leds.h>
+ #include <asm/bootinfo.h>
+ #include <asm/reboot.h>
+ #include <asm/time.h>
+@@ -260,6 +261,50 @@ static struct platform_device ar2315_spi
+ 	.num_resources = ARRAY_SIZE(ar2315_spiflash_res)
+ };
+ 
++#ifdef CONFIG_LEDS_GPIO
++static struct gpio_led ar2315_leds[6];
++static struct gpio_led_platform_data ar2315_led_data = {
++	.leds = (void *)ar2315_leds,
++};
++
++static struct platform_device ar2315_gpio_leds = {
++	.name = "leds-gpio",
++	.id = -1,
++	.dev = {
++		.platform_data = (void *)&ar2315_led_data,
++	}
++};
++
++static void __init ar2315_init_gpio_leds(void)
++{
++	static char led_names[6][6];
++	int i, led = 0;
++
++	ar2315_led_data.num_leds = 0;
++	for (i = 1; i < 8; i++) {
++		if ((i == AR2315_RESET_GPIO) ||
++		    (i == ath25_board.config->reset_config_gpio))
++			continue;
++
++		if (i == ath25_board.config->sys_led_gpio)
++			strcpy(led_names[led], "wlan");
++		else
++			sprintf(led_names[led], "gpio%d", i);
++
++		ar2315_leds[led].name = led_names[led];
++		ar2315_leds[led].gpio = i;
++		ar2315_leds[led].active_low = 0;
++		led++;
++	}
++	ar2315_led_data.num_leds = led;
++	platform_device_register(&ar2315_gpio_leds);
++}
++#else
++static inline void ar2315_init_gpio_leds(void)
++{
++}
++#endif
++
+ void __init ar2315_init_devices(void)
+ {
+ 	/* Find board configuration */
+@@ -270,6 +315,8 @@ void __init ar2315_init_devices(void)
+ 	ar2315_gpio_res[1].end = ar2315_gpio_res[1].start;
+ 	platform_device_register(&ar2315_gpio);
+ 
++	ar2315_init_gpio_leds();
++
+ 	ar2315_wdt_res[1].start = irq_create_mapping(ar2315_misc_irq_domain,
+ 						     AR2315_MISC_IRQ_WATCHDOG);
+ 	ar2315_wdt_res[1].end = ar2315_wdt_res[1].start;
+--- a/arch/mips/ath25/ar5312.c
++++ b/arch/mips/ath25/ar5312.c
+@@ -23,6 +23,7 @@
+ #include <linux/mtd/physmap.h>
+ #include <linux/reboot.h>
+ #include <linux/gpio.h>
++#include <linux/leds.h>
+ #include <asm/bootinfo.h>
+ #include <asm/reboot.h>
+ #include <asm/time.h>
+@@ -231,6 +232,23 @@ static struct platform_device ar5312_gpi
+ 	.num_resources = ARRAY_SIZE(ar5312_gpio_res),
+ };
+ 
++#ifdef CONFIG_LEDS_GPIO
++static struct gpio_led ar5312_leds[] = {
++	{ .name = "wlan", .gpio = 0, .active_low = 1, },
++};
++
++static const struct gpio_led_platform_data ar5312_led_data = {
++	.num_leds = ARRAY_SIZE(ar5312_leds),
++	.leds = (void *)ar5312_leds,
++};
++
++static struct platform_device ar5312_gpio_leds = {
++	.name = "leds-gpio",
++	.id = -1,
++	.dev.platform_data = (void *)&ar5312_led_data,
++};
++#endif
++
+ static void __init ar5312_flash_init(void)
+ {
+ 	void __iomem *flashctl_base;
+@@ -301,6 +319,11 @@ void __init ar5312_init_devices(void)
+ 
+ 	platform_device_register(&ar5312_gpio);
+ 
++#ifdef CONFIG_LEDS_GPIO
++	ar5312_leds[0].gpio = config->sys_led_gpio;
++	platform_device_register(&ar5312_gpio_leds);
++#endif
++
+ 	/* Fix up MAC addresses if necessary */
+ 	if (is_broadcast_ether_addr(config->enet0_mac))
+ 		ether_addr_copy(config->enet0_mac, config->enet1_mac);