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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/m68k/include/asm/gpio.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/m68k/include/asm/gpio.h')
-rw-r--r--arch/m68k/include/asm/gpio.h102
1 files changed, 102 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/gpio.h b/arch/m68k/include/asm/gpio.h
new file mode 100644
index 000000000..a50b27719
--- /dev/null
+++ b/arch/m68k/include/asm/gpio.h
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Coldfire generic GPIO support
+ *
+ * (C) Copyright 2009, Steven King <sfking@fdwdc.com>
+*/
+
+#ifndef coldfire_gpio_h
+#define coldfire_gpio_h
+
+#include <linux/io.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+#include <asm/mcfgpio.h>
+/*
+ * The Generic GPIO functions
+ *
+ * If the gpio is a compile time constant and is one of the Coldfire gpios,
+ * use the inline version, otherwise dispatch thru gpiolib.
+ */
+
+static inline int gpio_get_value(unsigned gpio)
+{
+ if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX)
+ return mcfgpio_read(__mcfgpio_ppdr(gpio)) & mcfgpio_bit(gpio);
+ else
+ return __gpio_get_value(gpio);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+ if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX) {
+ if (gpio < MCFGPIO_SCR_START) {
+ unsigned long flags;
+ MCFGPIO_PORTTYPE data;
+
+ local_irq_save(flags);
+ data = mcfgpio_read(__mcfgpio_podr(gpio));
+ if (value)
+ data |= mcfgpio_bit(gpio);
+ else
+ data &= ~mcfgpio_bit(gpio);
+ mcfgpio_write(data, __mcfgpio_podr(gpio));
+ local_irq_restore(flags);
+ } else {
+ if (value)
+ mcfgpio_write(mcfgpio_bit(gpio),
+ MCFGPIO_SETR_PORT(gpio));
+ else
+ mcfgpio_write(~mcfgpio_bit(gpio),
+ MCFGPIO_CLRR_PORT(gpio));
+ }
+ } else
+ __gpio_set_value(gpio, value);
+}
+
+static inline int gpio_to_irq(unsigned gpio)
+{
+#if defined(MCFGPIO_IRQ_MIN)
+ if ((gpio >= MCFGPIO_IRQ_MIN) && (gpio < MCFGPIO_IRQ_MAX))
+#else
+ if (gpio < MCFGPIO_IRQ_MAX)
+#endif
+ return gpio + MCFGPIO_IRQ_VECBASE;
+ else
+ return __gpio_to_irq(gpio);
+}
+
+static inline int irq_to_gpio(unsigned irq)
+{
+ return (irq >= MCFGPIO_IRQ_VECBASE &&
+ irq < (MCFGPIO_IRQ_VECBASE + MCFGPIO_IRQ_MAX)) ?
+ irq - MCFGPIO_IRQ_VECBASE : -ENXIO;
+}
+
+static inline int gpio_cansleep(unsigned gpio)
+{
+ return gpio < MCFGPIO_PIN_MAX ? 0 : __gpio_cansleep(gpio);
+}
+
+#ifndef CONFIG_GPIOLIB
+static inline int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
+{
+ int err;
+
+ err = gpio_request(gpio, label);
+ if (err)
+ return err;
+
+ if (flags & GPIOF_DIR_IN)
+ err = gpio_direction_input(gpio);
+ else
+ err = gpio_direction_output(gpio,
+ (flags & GPIOF_INIT_HIGH) ? 1 : 0);
+
+ if (err)
+ gpio_free(gpio);
+
+ return err;
+}
+#endif /* !CONFIG_GPIOLIB */
+#endif