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openwrt-xburst/target/linux/s3c24xx/patches-2.6.26/1117--neo-Every-access-to-GPIO-bank-B-has-to-go-through.patch
mirko a95f9f92e2 change prefix for kernelpatchbase 2.6.26 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13619 3c298f89-4303-0410-b956-a3cf2f4a3e73
2008-12-13 01:54:56 +00:00

498 lines
16 KiB
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Executable File
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From 81bf1ac05c1ba0d32db8fe8fb0cd52cb6b7d8e7e Mon Sep 17 00:00:00 2001
From: Holger Freyther <zecke@openmoko.org>
Date: Fri, 25 Jul 2008 23:06:05 +0100
Subject: [PATCH] [neo] Every access to GPIO bank B has to go through the shadow code
- Any setting of any PIN on bank B will undo the LED setting.
Introduce neo1973_gpb_set_pin to set the PIN in a way not losing
the LED or any other shadowed setting.
- Update users of GPBXY for gta01 and gta02.
Signed-Off-By: Holger Freyther <zecke@openmoko.org>
---
arch/arm/mach-s3c2410/mach-gta01.c | 9 ++--
arch/arm/mach-s3c2440/mach-gta02.c | 10 ++--
arch/arm/plat-s3c24xx/Makefile | 4 +-
arch/arm/plat-s3c24xx/neo1973_pm_bt.c | 15 +++---
arch/arm/plat-s3c24xx/neo1973_pm_gps.c | 5 ++-
arch/arm/plat-s3c24xx/neo1973_pm_gsm.c | 9 ++--
arch/arm/plat-s3c24xx/neo1973_shadow.c | 86 ++++++++++++++++++++++++++++++++
drivers/leds/leds-neo1973-gta02.c | 12 ++--
drivers/leds/leds-neo1973-vibrator.c | 7 ++-
drivers/video/backlight/gta01_bl.c | 9 ++--
include/asm-arm/plat-s3c24xx/neo1973.h | 33 ++++++++++++
11 files changed, 165 insertions(+), 34 deletions(-)
create mode 100644 arch/arm/plat-s3c24xx/neo1973_shadow.c
create mode 100644 include/asm-arm/plat-s3c24xx/neo1973.h
diff --git a/arch/arm/mach-s3c2410/mach-gta01.c b/arch/arm/mach-s3c2410/mach-gta01.c
index 8c1a402..a4384b6 100644
--- a/arch/arm/mach-s3c2410/mach-gta01.c
+++ b/arch/arm/mach-s3c2410/mach-gta01.c
@@ -72,6 +72,7 @@
#include <asm/plat-s3c24xx/cpu.h>
#include <asm/plat-s3c24xx/pm.h>
#include <asm/plat-s3c24xx/udc.h>
+#include <asm/plat-s3c24xx/neo1973.h>
static struct map_desc gta01_iodesc[] __initdata = {
{
@@ -416,10 +417,10 @@ static void gta01_mmc_set_power(unsigned char power_mode, unsigned short vdd)
case GTA01Bv4_SYSTEM_REV:
switch (power_mode) {
case MMC_POWER_OFF:
- s3c2410_gpio_setpin(GTA01_GPIO_SDMMC_ON, 1);
+ neo1973_gpb_setpin(GTA01_GPIO_SDMMC_ON, 1);
break;
case MMC_POWER_ON:
- s3c2410_gpio_setpin(GTA01_GPIO_SDMMC_ON, 0);
+ neo1973_gpb_setpin(GTA01_GPIO_SDMMC_ON, 0);
break;
}
break;
@@ -442,10 +443,10 @@ static void gta01_udc_command(enum s3c2410_udc_cmd_e cmd)
switch (cmd) {
case S3C2410_UDC_P_ENABLE:
- s3c2410_gpio_setpin(GTA01_GPIO_USB_PULLUP, 1);
+ neo1973_gpb_setpin(GTA01_GPIO_USB_PULLUP, 1);
break;
case S3C2410_UDC_P_DISABLE:
- s3c2410_gpio_setpin(GTA01_GPIO_USB_PULLUP, 0);
+ neo1973_gpb_setpin(GTA01_GPIO_USB_PULLUP, 0);
break;
default:
break;
diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
index f9e00d5..27babc9 100644
--- a/arch/arm/mach-s3c2440/mach-gta02.c
+++ b/arch/arm/mach-s3c2440/mach-gta02.c
@@ -75,6 +75,7 @@
#include <asm/plat-s3c24xx/cpu.h>
#include <asm/plat-s3c24xx/pm.h>
#include <asm/plat-s3c24xx/udc.h>
+#include <asm/plat-s3c24xx/neo1973.h>
#include <linux/jbt6k74.h>
#include <linux/glamofb.h>
@@ -127,11 +128,11 @@ FIQ_HANDLER_ENTRY(256, 512)
if (fiq_ipc.vib_pwm_latched || fiq_ipc.vib_pwm) { /* not idle */
if (((u8)_fiq_count_fiqs) == fiq_ipc.vib_pwm_latched)
- s3c2410_gpio_setpin(fiq_ipc.vib_gpio_pin, 0);
+ neo1973_gpb_setpin(fiq_ipc.vib_gpio_pin, 0);
if (((u8)_fiq_count_fiqs) == 0) {
fiq_ipc.vib_pwm_latched = fiq_ipc.vib_pwm;
if (fiq_ipc.vib_pwm_latched)
- s3c2410_gpio_setpin(fiq_ipc.vib_gpio_pin, 1);
+ neo1973_gpb_setpin(fiq_ipc.vib_gpio_pin, 1);
}
divisor = FIQ_DIVISOR_VIBRATOR;
}
@@ -319,6 +320,7 @@ FIQ_HANDLER_ENTRY(256, 512)
FIQ_HANDLER_END()
+
/**
* returns PCB revision information in b9,b8 and b2,b1,b0
* Pre-GTA02 A6 returns 0x000
@@ -763,10 +765,10 @@ static void gta02_udc_command(enum s3c2410_udc_cmd_e cmd)
switch (cmd) {
case S3C2410_UDC_P_ENABLE:
- s3c2410_gpio_setpin(GTA02_GPIO_USB_PULLUP, 1);
+ neo1973_gpb_setpin(GTA02_GPIO_USB_PULLUP, 1);
break;
case S3C2410_UDC_P_DISABLE:
- s3c2410_gpio_setpin(GTA02_GPIO_USB_PULLUP, 0);
+ neo1973_gpb_setpin(GTA02_GPIO_USB_PULLUP, 0);
break;
case S3C2410_UDC_P_RESET:
/* FIXME! */
diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
index 6b32a8a..c173f7b 100644
--- a/arch/arm/plat-s3c24xx/Makefile
+++ b/arch/arm/plat-s3c24xx/Makefile
@@ -33,4 +33,6 @@ obj-$(CONFIG_MACH_NEO1973) += neo1973_version.o \
neo1973_pm_host.o \
neo1973_pm_gsm.o \
neo1973_pm_gps.o \
- neo1973_pm_bt.o
+ neo1973_pm_bt.o \
+ neo1973_shadow.o
+
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_bt.c b/arch/arm/plat-s3c24xx/neo1973_pm_bt.c
index a9694b4..dfc9ae8 100644
--- a/arch/arm/plat-s3c24xx/neo1973_pm_bt.c
+++ b/arch/arm/plat-s3c24xx/neo1973_pm_bt.c
@@ -18,6 +18,7 @@
#include <asm/hardware.h>
#include <asm/mach-types.h>
+#include <asm/plat-s3c24xx/neo1973.h>
#ifdef CONFIG_MACH_NEO1973_GTA01
#include <asm/arch/gta01.h>
@@ -95,20 +96,20 @@ static ssize_t bt_write(struct device *dev, struct device_attribute *attr,
/* if we are powering up, assert reset, then power,
* then release reset */
if (on) {
- s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, 0);
+ neo1973_gpb_setpin(GTA01_GPIO_BT_EN, 0);
pcf50606_voltage_set(pcf50606_global,
PCF50606_REGULATOR_D1REG,
3100);
}
pcf50606_onoff_set(pcf50606_global,
PCF50606_REGULATOR_D1REG, on);
- s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, on);
+ neo1973_gpb_setpin(GTA01_GPIO_BT_EN, on);
break;
#endif /* CONFIG_MACH_NEO1973_GTA01 */
#ifdef CONFIG_MACH_NEO1973_GTA02
case MACH_TYPE_NEO1973_GTA02:
- s3c2410_gpio_setpin(GTA02_GPIO_BT_EN, on ? 0 : 1);
+ neo1973_gpb_setpin(GTA02_GPIO_BT_EN, on ? 0 : 1);
if (on)
pcf50633_voltage_set(pcf50633_global,
PCF50633_REGULATOR_LDO4, 3200);
@@ -127,13 +128,13 @@ static ssize_t bt_write(struct device *dev, struct device_attribute *attr,
#ifdef CONFIG_MACH_NEO1973_GTA01
case MACH_TYPE_NEO1973_GTA01:
- s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, on ? 0 : 1);
+ neo1973_gpb_setpin(GTA01_GPIO_BT_EN, on ? 0 : 1);
break;
#endif /* CONFIG_MACH_NEO1973_GTA01 */
#ifdef CONFIG_MACH_NEO1973_GTA02
case MACH_TYPE_NEO1973_GTA02:
- s3c2410_gpio_setpin(GTA02_GPIO_BT_EN, on ? 0 : 1);
+ neo1973_gpb_setpin(GTA02_GPIO_BT_EN, on ? 0 : 1);
break;
#endif /* CONFIG_MACH_NEO1973_GTA02 */
@@ -192,7 +193,7 @@ static int __init gta01_bt_probe(struct platform_device *pdev)
PCF50606_REGULATOR_D1REG, 0);
/* we pull reset to low to make sure that the chip doesn't
* drain power through the reset line */
- s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, 0);
+ neo1973_gpb_setpin(GTA01_GPIO_BT_EN, 0);
break;
#endif /* CONFIG_MACH_NEO1973_GTA01 */
@@ -203,7 +204,7 @@ static int __init gta01_bt_probe(struct platform_device *pdev)
PCF50633_REGULATOR_LDO4, 0);
/* we pull reset to low to make sure that the chip doesn't
* drain power through the reset line */
- s3c2410_gpio_setpin(GTA02_GPIO_BT_EN, 0);
+ neo1973_gpb_setpin(GTA02_GPIO_BT_EN, 0);
break;
#endif /* CONFIG_MACH_NEO1973_GTA02 */
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
index d882f7b..d020f8d 100644
--- a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
+++ b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
@@ -20,6 +20,9 @@
#include <asm/hardware.h>
#include <asm/mach-types.h>
+
+#include <asm/plat-s3c24xx/neo1973.h>
+
#ifdef CONFIG_MACH_NEO1973_GTA01
#include <asm/arch/gta01.h>
#include <linux/pcf50606.h>
@@ -264,7 +267,7 @@ static void gps_pwron_set(int on)
{
#ifdef CONFIG_MACH_NEO1973_GTA01
if (machine_is_neo1973_gta01())
- s3c2410_gpio_setpin(GTA01_GPIO_GPS_PWRON, on);
+ neo1973_gpb_setpin(GTA01_GPIO_GPS_PWRON, on);
#endif /* CONFIG_MACH_NEO1973_GTA01 */
#ifdef CONFIG_MACH_NEO1973_GTA02
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
index 5ad942e..149b866 100644
--- a/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
+++ b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
@@ -22,6 +22,7 @@
#include <asm/gpio.h>
#include <asm/mach-types.h>
#include <asm/arch/gta01.h>
+#include <asm/plat-s3c24xx/neo1973.h>
#ifdef CONFIG_MACH_NEO1973_GTA02
#include <asm/arch/gta02.h>
@@ -109,9 +110,9 @@ static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
#endif
}
- s3c2410_gpio_setpin(GTA01_GPIO_MODEM_ON, 1);
+ neo1973_gpb_setpin(GTA01_GPIO_MODEM_ON, 1);
} else {
- s3c2410_gpio_setpin(GTA01_GPIO_MODEM_ON, 0);
+ neo1973_gpb_setpin(GTA01_GPIO_MODEM_ON, 0);
switch (system_rev) {
#ifdef CONFIG_MACH_NEO1973_GTA02
@@ -138,9 +139,9 @@ static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
}
} else if (!strcmp(attr->attr.name, "reset")) {
if (machine_is_neo1973_gta01())
- s3c2410_gpio_setpin(GTA01_GPIO_MODEM_RST, on);
+ neo1973_gpb_setpin(GTA01_GPIO_MODEM_RST, on);
else if (machine_is_neo1973_gta02())
- s3c2410_gpio_setpin(GTA02_GPIO_MODEM_RST, on);
+ neo1973_gpb_setpin(GTA02_GPIO_MODEM_RST, on);
} else if (!strcmp(attr->attr.name, "download")) {
if (machine_is_neo1973_gta01())
s3c2410_gpio_setpin(GTA01_GPIO_MODEM_DNLOAD, on);
diff --git a/arch/arm/plat-s3c24xx/neo1973_shadow.c b/arch/arm/plat-s3c24xx/neo1973_shadow.c
new file mode 100644
index 0000000..09667da
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/neo1973_shadow.c
@@ -0,0 +1,86 @@
+/*
+ * include/asm-arm/plat-s3c24xx/neo1973.h
+ *
+ * Common utility code for GTA01 and GTA02
+ *
+ * Copyright (C) 2008 by Openmoko, Inc.
+ * Author: Holger Hans Peter Freyther <freyther@openmoko.org>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/irq.h>
+
+#include <asm/gpio.h>
+#include <asm/plat-s3c24xx/neo1973.h>
+
+/**
+ * Shadow GPIO bank B handling. For the LEDs we need to keep track of the state
+ * in software. The s3c2410_gpio_setpin must not be used for GPIOs on bank B
+ */
+static unsigned long gpb_mask;
+static unsigned long gpb_state;
+
+void neo1973_gpb_add_shadow_gpio(unsigned int gpio)
+{
+ unsigned long offset = S3C2410_GPIO_OFFSET(gpio);
+ unsigned long flags;
+
+ local_irq_save(flags);
+ gpb_mask |= 1L << offset;
+ local_irq_restore(flags);
+}
+EXPORT_SYMBOL(neo1973_gpb_add_shadow_gpio);
+
+static void set_shadow_gpio(unsigned long offset, unsigned int value)
+{
+ unsigned long state = value != 0;
+
+ gpb_state &= ~(1L << offset);
+ gpb_state |= state << offset;
+}
+
+void neo1973_gpb_setpin(unsigned int pin, unsigned to)
+{
+ void __iomem *base = S3C24XX_GPIO_BASE(S3C2410_GPB0);
+ unsigned long offset = S3C2410_GPIO_OFFSET(pin);
+ unsigned long flags;
+ unsigned long dat;
+
+ BUG_ON(base != S3C24XX_GPIO_BASE(pin));
+
+ local_irq_save(flags);
+ dat = __raw_readl(base + 0x04);
+
+ /* Add the shadow values */
+ dat &= ~gpb_mask;
+ dat |= gpb_state;
+
+ /* Do the operation like s3c2410_gpio_setpin */
+ dat &= ~(1L << offset);
+ dat |= to << offset;
+
+ /* Update the shadow state */
+ if ((1L << offset) & gpb_mask)
+ set_shadow_gpio(offset, to);
+
+ __raw_writel(dat, base + 0x04);
+ local_irq_restore(flags);
+}
+EXPORT_SYMBOL(neo1973_gpb_setpin);
diff --git a/drivers/leds/leds-neo1973-gta02.c b/drivers/leds/leds-neo1973-gta02.c
index 343550a..952ad69 100644
--- a/drivers/leds/leds-neo1973-gta02.c
+++ b/drivers/leds/leds-neo1973-gta02.c
@@ -20,6 +20,7 @@
#include <asm/arch/pwm.h>
#include <asm/arch/gta02.h>
#include <asm/plat-s3c/regs-timer.h>
+#include <asm/plat-s3c24xx/neo1973.h>
#define MAX_LEDS 3
#define COUNTER 256
@@ -60,14 +61,13 @@ static void gta02led_set(struct led_classdev *led_cdev,
* value == 0 -> 0% duty cycle (zero power)
*/
mutex_lock(&lp->mutex);
+
if (lp->has_pwm) {
- s3c2410_pwm_duty_cycle(value, &lp->pwm);
+ s3c2410_pwm_duty_cycle(value, &lp->pwm);
} else {
- if (value)
- s3c2410_gpio_setpin(lp->gpio, 1);
- else
- s3c2410_gpio_setpin(lp->gpio, 0);
+ neo1973_gpb_setpin(lp->gpio, value ? 1 : 0);
}
+
mutex_unlock(&lp->mutex);
}
@@ -164,7 +164,7 @@ static int __init gta02led_probe(struct platform_device *pdev)
case S3C2410_GPB3:
lp->has_pwm = 0;
s3c2410_gpio_cfgpin(lp->gpio, S3C2410_GPIO_OUTPUT);
- s3c2410_gpio_setpin(lp->gpio, 0);
+ neo1973_gpb_add_shadow_gpio(lp->gpio);
break;
default:
break;
diff --git a/drivers/leds/leds-neo1973-vibrator.c b/drivers/leds/leds-neo1973-vibrator.c
index f31302d..647e860 100644
--- a/drivers/leds/leds-neo1973-vibrator.c
+++ b/drivers/leds/leds-neo1973-vibrator.c
@@ -24,6 +24,7 @@
#include <asm/plat-s3c/regs-timer.h>
#include <asm/arch-s3c2410/fiq_ipc_gta02.h>
+#include <asm/plat-s3c24xx/neo1973.h>
#define COUNTER 64
@@ -56,9 +57,9 @@ static void neo1973_vib_vib_set(struct led_classdev *led_cdev,
s3c2410_pwm_duty_cycle(value / 4, &vp->pwm);
else {
if (value)
- s3c2410_gpio_setpin(vp->gpio, 1);
+ neo1973_gpb_setpin(vp->gpio, 1);
else
- s3c2410_gpio_setpin(vp->gpio, 0);
+ neo1973_gpb_setpin(vp->gpio, 0);
}
mutex_unlock(&vp->mutex);
@@ -131,7 +132,7 @@ static int __init neo1973_vib_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, &neo1973_vib_led);
if (machine_is_neo1973_gta02()) { /* use FIQ to control GPIO */
- s3c2410_gpio_setpin(neo1973_vib_led.gpio, 0); /* off */
+ neo1973_gpb_setpin(neo1973_vib_led.gpio, 0); /* off */
s3c2410_gpio_cfgpin(neo1973_vib_led.gpio, S3C2410_GPIO_OUTPUT);
/* safe, kmalloc'd copy needed for FIQ ISR */
fiq_ipc.vib_gpio_pin = neo1973_vib_led.gpio;
diff --git a/drivers/video/backlight/gta01_bl.c b/drivers/video/backlight/gta01_bl.c
index bd7d41f..301ec9c 100644
--- a/drivers/video/backlight/gta01_bl.c
+++ b/drivers/video/backlight/gta01_bl.c
@@ -40,6 +40,7 @@
#include <asm/arch/pwm.h>
#include <asm/plat-s3c/regs-timer.h>
+#include <asm/plat-s3c24xx/neo1973.h>
static struct backlight_properties gta01bl_prop;
static struct backlight_device *gta01_backlight_device;
@@ -83,12 +84,12 @@ static int gta01bl_send_intensity(struct backlight_device *bd)
mutex_lock(&gta01bl.mutex);
#ifdef GTA01_BACKLIGHT_ONOFF_ONLY
if (intensity)
- s3c2410_gpio_setpin(GTA01_GPIO_BACKLIGHT, 1);
+ neo1973_gpb_setpin(GTA01_GPIO_BACKLIGHT, 1);
else
- s3c2410_gpio_setpin(GTA01_GPIO_BACKLIGHT, 0);
+ neo1973_gpb_setpin(GTA01_GPIO_BACKLIGHT, 0);
#else
if (intensity == bd->props.max_brightness) {
- s3c2410_gpio_setpin(GTA01_GPIO_BACKLIGHT, 1);
+ neo1973_gpb_setpin(GTA01_GPIO_BACKLIGHT, 1);
s3c2410_gpio_cfgpin(GTA01_GPIO_BACKLIGHT, S3C2410_GPIO_OUTPUT);
} else {
s3c2410_pwm_duty_cycle(intensity & 0xffff, &gta01bl.pwm);
@@ -222,7 +223,7 @@ static int gta01bl_remove(struct platform_device *dev)
mutex_destroy(&gta01bl.mutex);
s3c2410_gpio_cfgpin(GTA01_GPIO_BACKLIGHT, S3C2410_GPIO_OUTPUT);
- s3c2410_gpio_setpin(GTA01_GPIO_BACKLIGHT, 1);
+ neo1973_gpb_setpin(GTA01_GPIO_BACKLIGHT, 1);
return 0;
}
diff --git a/include/asm-arm/plat-s3c24xx/neo1973.h b/include/asm-arm/plat-s3c24xx/neo1973.h
new file mode 100644
index 0000000..63297de
--- /dev/null
+++ b/include/asm-arm/plat-s3c24xx/neo1973.h
@@ -0,0 +1,33 @@
+/*
+ * include/asm-arm/plat-s3c24xx/neo1973.h
+ *
+ * Common utility code for GTA01 and GTA02
+ *
+ * Copyright (C) 2008 by Openmoko, Inc.
+ * Author: Holger Hans Peter Freyther <freyther@openmoko.org>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#ifndef NEO1973_H
+#define NEO1973_H
+
+void neo1973_gpb_add_shadow_gpio(unsigned int gpio);
+void neo1973_gpb_setpin(unsigned int pin, unsigned to);
+
+#endif
--
1.5.6.3
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