mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 04:23:46 +00:00
38b6686f05
Add pinctrl driver for i.MX8. The pads configuration is controlled by SCU, so need to ask SCU to configure pads through scfw API. Add pinctrl-scu to invoke sc_pad_set to configure pads. Add a new flag IMX8_USE_SCU to differentiate i.MX8 from other platforms which could directly configure pads from Acore side. Add CONFIG_PINCTRL_IMX8 as the built gate. Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Anatolij Gustschin <agust@denx.de> Cc: Stefano Babic <sbabic@denx.de>
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2018 NXP
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <errno.h>
|
|
#include <linux/bitops.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/sci/sci.h>
|
|
#include <misc.h>
|
|
|
|
#include "pinctrl-imx.h"
|
|
|
|
#define PADRING_IFMUX_EN_SHIFT 31
|
|
#define PADRING_IFMUX_EN_MASK BIT(31)
|
|
#define PADRING_GP_EN_SHIFT 30
|
|
#define PADRING_GP_EN_MASK BIT(30)
|
|
#define PADRING_IFMUX_SHIFT 27
|
|
#define PADRING_IFMUX_MASK GENMASK(29, 27)
|
|
|
|
static int imx_pinconf_scu_set(struct imx_pinctrl_soc_info *info, u32 pad,
|
|
u32 mux, u32 val)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* Mux should be done in pmx set, but we do not have a good api
|
|
* to handle that in scfw, so config it in pad conf func
|
|
*/
|
|
|
|
val |= PADRING_IFMUX_EN_MASK;
|
|
val |= PADRING_GP_EN_MASK;
|
|
val |= (mux << PADRING_IFMUX_SHIFT) & PADRING_IFMUX_MASK;
|
|
|
|
ret = sc_pad_set(-1, pad, val);
|
|
if (ret)
|
|
printf("%s %d\n", __func__, ret);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int imx_pinctrl_scu_conf_pins(struct imx_pinctrl_soc_info *info, u32 *pin_data,
|
|
int npins)
|
|
{
|
|
int pin_id, mux, config_val;
|
|
int i, j = 0;
|
|
int ret;
|
|
|
|
/*
|
|
* Refer to linux documentation for details:
|
|
* Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt
|
|
*/
|
|
for (i = 0; i < npins; i++) {
|
|
pin_id = pin_data[j++];
|
|
mux = pin_data[j++];
|
|
config_val = pin_data[j++];
|
|
|
|
ret = imx_pinconf_scu_set(info, pin_id, mux, config_val);
|
|
if (ret)
|
|
printf("Set pin %d, mux %d, val %d, error\n", pin_id,
|
|
mux, config_val);
|
|
}
|
|
|
|
return 0;
|
|
}
|