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u-boot/arch/powerpc/include/asm/mpc85xx_gpio.h
Madalin Bucur 9e998d5dc1 powerpc/mpc85xx: Fix compiling error with DM_GPIO
P4080DS compilation fails with DM_GPIO enabled:

drivers/gpio/gpio-uclass.c:355:5: error: redefinition of 'gpio_request'
 int gpio_request(unsigned gpio, const char *label)
     ^~~~~~~~~~~~
In file included from ./arch/powerpc/include/asm/arch/gpio.h:17:0,
                 from ./arch/powerpc/include/asm/gpio.h:1,
                 from drivers/gpio/gpio-uclass.c:16:
./arch/powerpc/include/asm/mpc85xx_gpio.h:68:19: note: previous definition of 'gpio_request' was here
 static inline int gpio_request(unsigned gpio, const char *label)
                   ^~~~~~~~~~~~

Signed-off-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
2020-06-03 12:14:27 +05:30

115 lines
2.6 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2010 eXMeritus, A Boeing Company
*/
#ifndef POWERPC_ASM_MPC85XX_GPIO_H_
#define POWERPC_ASM_MPC85XX_GPIO_H_
#ifndef CONFIG_DM_GPIO
# include <asm/immap_85xx.h>
/*
* The following internal functions are an MPC85XX-specific GPIO API which
* allows setting and querying multiple GPIOs in a single operation.
*
* All of these look relatively large, but the arguments are almost always
* constants, so they compile down to just a few instructions and a
* memory-mapped IO operation or two.
*/
static inline void mpc85xx_gpio_set(unsigned int mask,
unsigned int dir, unsigned int val)
{
ccsr_gpio_t *gpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
/* First mask off the unwanted parts of "dir" and "val" */
dir &= mask;
val &= mask;
/* Now read in the values we're supposed to preserve */
dir |= (in_be32(&gpio->gpdir) & ~mask);
val |= (in_be32(&gpio->gpdat) & ~mask);
/*
* Poke the new output values first, then set the direction. This
* helps to avoid transient data when switching from input to output
* and vice versa.
*/
out_be32(&gpio->gpdat, val);
out_be32(&gpio->gpdir, dir);
}
static inline void mpc85xx_gpio_set_in(unsigned int gpios)
{
mpc85xx_gpio_set(gpios, 0x00000000, 0x00000000);
}
static inline void mpc85xx_gpio_set_low(unsigned int gpios)
{
mpc85xx_gpio_set(gpios, 0xFFFFFFFF, 0x00000000);
}
static inline void mpc85xx_gpio_set_high(unsigned int gpios)
{
mpc85xx_gpio_set(gpios, 0xFFFFFFFF, 0xFFFFFFFF);
}
static inline unsigned int mpc85xx_gpio_get(unsigned int mask)
{
ccsr_gpio_t *gpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
/* Read the requested values */
return in_be32(&gpio->gpdat) & mask;
}
/*
* These implement the generic Linux GPIO API on top of the other functions
* in this header.
*/
static inline int gpio_request(unsigned gpio, const char *label)
{
/* Compatibility shim */
return 0;
}
static inline int gpio_free(unsigned gpio)
{
/* Compatibility shim */
return 0;
}
static inline int gpio_direction_input(unsigned gpio)
{
mpc85xx_gpio_set_in(1U << gpio);
return 0;
}
static inline int gpio_direction_output(unsigned gpio, int value)
{
if (value)
mpc85xx_gpio_set_high(1U << gpio);
else
mpc85xx_gpio_set_low(1U << gpio);
return 0;
}
static inline int gpio_get_value(unsigned gpio)
{
return !!mpc85xx_gpio_get(1U << gpio);
}
static inline int gpio_set_value(unsigned gpio, int value)
{
if (value)
mpc85xx_gpio_set_high(1U << gpio);
else
mpc85xx_gpio_set_low(1U << gpio);
return 0;
}
static inline int gpio_is_valid(int gpio)
{
return (gpio >= 0) && (gpio < 32);
}
#endif /* not CONFIG_DM_GPIO */
#endif /* not POWERPC_ASM_MPC85XX_GPIO_H_ */