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authorGreg Ungerer <gerg@uclinux.org>2011-03-22 03:39:27 (GMT)
committerGreg Ungerer <gerg@uclinux.org>2011-03-25 04:05:13 (GMT)
commit66d857b08b8c3ed5c72c361f863cce77d2a978d7 (patch)
tree47222d86f4d78dc0da31baf64188bd2e4b38ac1e /arch/m68k/platform/coldfire/gpio.c
parentd39dd11c3e6a7af5c20bfac40594db36cf270f42 (diff)
downloadlinux-fsl-qoriq-66d857b08b8c3ed5c72c361f863cce77d2a978d7.tar.xz
m68k: merge m68k and m68knommu arch directories
There is a lot of common code that could be shared between the m68k and m68knommu arch branches. It makes sense to merge the two branches into a single directory structure so that we can more easily share that common code. This is a brute force merge, based on a script from Stephen King <sfking@fdwdc.com>, which was originally written by Arnd Bergmann <arnd@arndb.de>. > The script was inspired by the script Sam Ravnborg used to merge the > includes from m68knommu. For those files common to both arches but > differing in content, the m68k version of the file is renamed to > <file>_mm.<ext> and the m68knommu version of the file is moved into the > corresponding m68k directory and renamed <file>_no.<ext> and a small > wrapper file <file>.<ext> is used to select between the two version. Files > that are common to both but don't differ are removed from the m68knommu > tree and files and directories that are unique to the m68knommu tree are > moved to the m68k tree. Finally, the arch/m68knommu tree is removed. > > To select between the the versions of the files, the wrapper uses > > #ifdef CONFIG_MMU > #include <file>_mm.<ext> > #else > #include <file>_no.<ext> > #endif On top of this file merge I have done a simplistic merge of m68k and m68knommu Kconfig, which primarily attempts to keep existing options and menus in place. Other than a handful of options being moved it produces identical .config outputs on m68k and m68knommu targets I tested it on. With this in place there is now quite a bit of scope for merge cleanups in future patches. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch/m68k/platform/coldfire/gpio.c')
-rw-r--r--arch/m68k/platform/coldfire/gpio.c127
1 files changed, 127 insertions, 0 deletions
diff --git a/arch/m68k/platform/coldfire/gpio.c b/arch/m68k/platform/coldfire/gpio.c
new file mode 100644
index 0000000..ff004579
--- /dev/null
+++ b/arch/m68k/platform/coldfire/gpio.c
@@ -0,0 +1,127 @@
+/*
+ * Coldfire generic GPIO support.
+ *
+ * (C) Copyright 2009, Steven King <sfking@fdwdc.com>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sysdev.h>
+
+#include <asm/gpio.h>
+#include <asm/pinmux.h>
+#include <asm/mcfgpio.h>
+
+#define MCF_CHIP(chip) container_of(chip, struct mcf_gpio_chip, gpio_chip)
+
+int mcf_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ unsigned long flags;
+ MCFGPIO_PORTTYPE dir;
+ struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
+
+ local_irq_save(flags);
+ dir = mcfgpio_read(mcf_chip->pddr);
+ dir &= ~mcfgpio_bit(chip->base + offset);
+ mcfgpio_write(dir, mcf_chip->pddr);
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+int mcf_gpio_get_value(struct gpio_chip *chip, unsigned offset)
+{
+ struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
+
+ return mcfgpio_read(mcf_chip->ppdr) & mcfgpio_bit(chip->base + offset);
+}
+
+int mcf_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
+ int value)
+{
+ unsigned long flags;
+ MCFGPIO_PORTTYPE data;
+ struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
+
+ local_irq_save(flags);
+ /* write the value to the output latch */
+ data = mcfgpio_read(mcf_chip->podr);
+ if (value)
+ data |= mcfgpio_bit(chip->base + offset);
+ else
+ data &= ~mcfgpio_bit(chip->base + offset);
+ mcfgpio_write(data, mcf_chip->podr);
+
+ /* now set the direction to output */
+ data = mcfgpio_read(mcf_chip->pddr);
+ data |= mcfgpio_bit(chip->base + offset);
+ mcfgpio_write(data, mcf_chip->pddr);
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+void mcf_gpio_set_value(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
+
+ unsigned long flags;
+ MCFGPIO_PORTTYPE data;
+
+ local_irq_save(flags);
+ data = mcfgpio_read(mcf_chip->podr);
+ if (value)
+ data |= mcfgpio_bit(chip->base + offset);
+ else
+ data &= ~mcfgpio_bit(chip->base + offset);
+ mcfgpio_write(data, mcf_chip->podr);
+ local_irq_restore(flags);
+}
+
+void mcf_gpio_set_value_fast(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
+
+ if (value)
+ mcfgpio_write(mcfgpio_bit(chip->base + offset), mcf_chip->setr);
+ else
+ mcfgpio_write(~mcfgpio_bit(chip->base + offset), mcf_chip->clrr);
+}
+
+int mcf_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
+
+ return mcf_chip->gpio_to_pinmux ?
+ mcf_pinmux_request(mcf_chip->gpio_to_pinmux[offset], 0) : 0;
+}
+
+void mcf_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
+
+ mcf_gpio_direction_input(chip, offset);
+
+ if (mcf_chip->gpio_to_pinmux)
+ mcf_pinmux_release(mcf_chip->gpio_to_pinmux[offset], 0);
+}
+
+struct sysdev_class mcf_gpio_sysclass = {
+ .name = "gpio",
+};
+
+static int __init mcf_gpio_sysinit(void)
+{
+ return sysdev_class_register(&mcf_gpio_sysclass);
+}
+
+core_initcall(mcf_gpio_sysinit);