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pinmux: added support for the SiFive Freedom E310 pinmux driver

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Change-Id: I4d1a1775df20e8d074b2f5a4a9f91619289582ff
Signed-off-by: Jean-Paul Etienne <fractalclone@gmail.com>
This commit is contained in:
Jean-Paul Etienne 2017-03-14 22:16:15 +01:00 • committed by Anas Nashif
commit f2c96e8fff
4 changed files with 124 additions and 0 deletions
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2
drivers/pinmux/Kconfig
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@ -52,4 +52,6 @@ source "drivers/pinmux/Kconfig.stm32"
source "drivers/pinmux/Kconfig.beetle"
source "drivers/pinmux/Kconfig.fe310"
endif # PINMUX

21
drivers/pinmux/Kconfig.fe310 Normal file
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@ -0,0 +1,21 @@
# Kconfig.fe310 - PINMUX configuration options for SiFive Freedom E310 SOC
#
# Copyright (c) 2017 Jean-Paul Etienne <fractalclone@gmail.com>
#
# SPDX-License-Identifier: Apache-2.0
#
menuconfig PINMUX_FE310
bool "SiFive Freedom E310 SOC pinmux driver"
depends on PINMUX && SOC_SERIES_RISCV32_FE310
default n
help
Enable driver for the SiFive Freedom E310 SOC pinmux driver
if PINMUX_FE310
config PINMUX_FE310_0_NAME
string "FE310 pinmux 0 driver name"
default "pinmux0"
endif # PINMUX_FE310

1
drivers/pinmux/Makefile
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@ -17,6 +17,7 @@ obj-$(CONFIG_BOARD_NUCLEO_L476RG) += stm32/pinmux_board_nucleo_l476rg.o
obj-$(CONFIG_BOARD_OLIMEXINO_STM32) += stm32/pinmux_board_olimexino_stm32.o
obj-$(CONFIG_BOARD_STM32_MINI_A15) += stm32/pinmux_board_stm32_mini_a15.o
obj-$(CONFIG_PINMUX_QMSI) += pinmux_qmsi.o
obj-$(CONFIG_PINMUX_FE310) += pinmux_fe310.o
# "runtime" pinmux
obj-$(CONFIG_PINMUX_DEV) += dev/

100
drivers/pinmux/pinmux_fe310.c Normal file
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@ -0,0 +1,100 @@
/*
* Copyright (c) 2017 Jean-Paul Etienne <fractalclone@gmail.com>
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @brief PINMUX driver for the SiFive Freedom E310 Processor
*/
#include <errno.h>
#include <device.h>
#include <pinmux.h>
#include <soc.h>
struct pinmux_fe310_config {
uint32_t base;
};
struct pinmux_fe310_regs_t {
uint32_t iof_en;
uint32_t iof_sel;
};
#define DEV_CFG(dev) \
((const struct pinmux_fe310_config * const) \
(dev)->config->config_info)
#define DEV_PINMUX(dev) \
((struct pinmux_fe310_regs_t *)(DEV_CFG(dev))->base)
static int pinmux_fe310_set(struct device *dev, uint32_t pin, uint32_t func)
{
volatile struct pinmux_fe310_regs_t *pinmux = DEV_PINMUX(dev);
if (func > FE310_PINMUX_IOF1 ||
pin >= FE310_PINMUX_PINS)
return -EINVAL;
if (func == FE310_PINMUX_IOF1)
pinmux->iof_sel |= (FE310_PINMUX_IOF1 << pin);
else
pinmux->iof_sel &= ~(FE310_PINMUX_IOF1 << pin);
/* Enable IO function for this pin */
pinmux->iof_en |= (1 << pin);
return 0;
}
static int pinmux_fe310_get(struct device *dev, uint32_t pin, uint32_t *func)
{
volatile struct pinmux_fe310_regs_t *pinmux = DEV_PINMUX(dev);
if (pin >= FE310_PINMUX_PINS ||
func == NULL)
return -EINVAL;
*func = (pinmux->iof_sel & (FE310_PINMUX_IOF1 << pin)) ?
FE310_PINMUX_IOF1 : FE310_PINMUX_IOF0;
return 0;
}
static int pinmux_fe310_pullup(struct device *dev, uint32_t pin, uint8_t func)
{
return -ENOTSUP;
}
static int pinmux_fe310_input(struct device *dev, uint32_t pin, uint8_t func)
{
return -ENOTSUP;
}
static int pinmux_fe310_init(struct device *dev)
{
volatile struct pinmux_fe310_regs_t *pinmux = DEV_PINMUX(dev);
/* Ensure that all pins are disabled initially */
pinmux->iof_en = 0x0;
return 0;
}
static const struct pinmux_driver_api pinmux_fe310_driver_api = {
.set = pinmux_fe310_set,
.get = pinmux_fe310_get,
.pullup = pinmux_fe310_pullup,
.input = pinmux_fe310_input,
};
static const struct pinmux_fe310_config pinmux_fe310_0_config = {
.base = FE310_PINMUX_0_BASE_ADDR,
};
DEVICE_AND_API_INIT(pinmux_fe310_0, CONFIG_PINMUX_FE310_0_NAME,
&pinmux_fe310_init, NULL,
&pinmux_fe310_0_config,
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
&pinmux_fe310_driver_api);