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https://github.com/AsahiLinux/u-boot
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3fad441c54
This patch adds pinctrl support for mt7628, with a file for common pinmux functions and a file for mt7628 which has additional support for pinconf. Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2019 MediaTek Inc. All Rights Reserved.
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*
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* Author: Weijie Gao <weijie.gao@mediatek.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <dm/pinctrl.h>
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#include <linux/io.h>
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#include "pinctrl-mtmips-common.h"
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static void mtmips_pinctrl_reg_set(struct mtmips_pinctrl_priv *priv,
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u32 reg, u32 shift, u32 mask, u32 value)
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{
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u32 val;
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val = readl(priv->base + reg);
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val &= ~(mask << shift);
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val |= value << shift;
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writel(val, priv->base + reg);
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}
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int mtmips_get_functions_count(struct udevice *dev)
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{
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struct mtmips_pinctrl_priv *priv = dev_get_priv(dev);
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return priv->nfuncs;
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}
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const char *mtmips_get_function_name(struct udevice *dev, unsigned int selector)
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{
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struct mtmips_pinctrl_priv *priv = dev_get_priv(dev);
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return priv->funcs[selector]->name;
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}
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int mtmips_pinmux_group_set(struct udevice *dev, unsigned int group_selector,
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unsigned int func_selector)
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{
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struct mtmips_pinctrl_priv *priv = dev_get_priv(dev);
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const struct mtmips_pmx_group *grp = &priv->groups[group_selector];
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const struct mtmips_pmx_func *func = priv->funcs[func_selector];
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int i;
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if (!grp->nfuncs)
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return 0;
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for (i = 0; i < grp->nfuncs; i++) {
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if (!strcmp(grp->funcs[i].name, func->name)) {
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mtmips_pinctrl_reg_set(priv, grp->reg, grp->shift,
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grp->mask, grp->funcs[i].value);
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return 0;
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}
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}
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return -EINVAL;
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}
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int mtmips_pinctrl_probe(struct mtmips_pinctrl_priv *priv, u32 ngroups,
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const struct mtmips_pmx_group *groups)
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{
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int i, j, n;
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priv->ngroups = ngroups;
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priv->groups = groups;
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priv->nfuncs = 0;
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for (i = 0; i < ngroups; i++)
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priv->nfuncs += groups[i].nfuncs;
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priv->funcs = malloc(priv->nfuncs * sizeof(*priv->funcs));
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if (!priv->funcs)
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return -ENOMEM;
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n = 0;
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for (i = 0; i < ngroups; i++) {
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for (j = 0; j < groups[i].nfuncs; j++)
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priv->funcs[n++] = &groups[i].funcs[j];
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}
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return 0;
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}
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