Hello. Thomas Chou wrote:
> This patch adds driver for a trivial gpio core, which is described > in http://nioswiki.com/GPIO. > > When CONFIG_SYS_GPIO_BASE is not defined, board may provide > its own driver. > > Signed-off-by: Thomas Chou <tho...@wytron.com.tw> > --- > arch dir reorganized. > > arch/nios2/include/asm/gpio.h | 52 > +++++++++++++++++++++++++++++++++++++++++ > 1 files changed, 52 insertions(+), 0 deletions(-) > create mode 100644 arch/nios2/include/asm/gpio.h > > diff --git a/arch/nios2/include/asm/gpio.h b/arch/nios2/include/asm/gpio.h > new file mode 100644 > index 0000000..cd2df7d > --- /dev/null > +++ b/arch/nios2/include/asm/gpio.h > @@ -0,0 +1,52 @@ > +/* > + * nios2 gpio driver > + * > + * This gpio core is described in http://nioswiki.com/GPIO > + * bit[0] data > + * bit[1] output enable > + * > + * when CONFIG_SYS_GPIO_BASE is not defined, board may provide > + * its own driver. > + * > + * Copyright (C) 2010 Thomas Chou <tho...@wytron.com.tw> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + */ > + > +#ifndef _ASM_NIOS2_GPIO_H_ > +#define _ASM_NIOS2_GPIO_H_ 1 > + > +#ifdef CONFIG_SYS_GPIO_BASE > +#include <asm/io.h> > + > +static inline int gpio_direction_input(unsigned gpio) > +{ > + writel(1, CONFIG_SYS_GPIO_BASE + ((gpio) << 2)); > > + return 0; > +} > + > +static inline int gpio_direction_output(unsigned gpio, int value) > +{ > + writel(value ? 3 : 2, CONFIG_SYS_GPIO_BASE + ((gpio) << 2)); > + return 0; > +} > + > +static inline int gpio_get_value(unsigned gpio) > +{ > + return readl(CONFIG_SYS_GPIO_BASE + ((gpio) << 2)); > +} > + > +static inline void gpio_set_value(unsigned gpio, int value) > +{ > + writel(value ? 3 : 2, CONFIG_SYS_GPIO_BASE + ((gpio) << 2)); > +} > Why enclose 'gpio' into () when it's not within a macro? WBR, Sergei _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
