893 lines
23 KiB
C
893 lines
23 KiB
C
/*
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* Core driver for the imx pin controller
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*
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* Copyright (C) 2012 Freescale Semiconductor, Inc.
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* Copyright (C) 2012 Linaro Ltd.
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*
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* Author: Dong Aisheng <dong.aisheng@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/mfd/syscon.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_address.h>
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#include <linux/pinctrl/machine.h>
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#include <linux/pinctrl/pinconf.h>
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/slab.h>
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#include <linux/regmap.h>
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#include "../core.h"
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#include "../pinconf.h"
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#include "../pinmux.h"
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#include "pinctrl-imx.h"
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/* The bits in CONFIG cell defined in binding doc*/
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#define IMX_NO_PAD_CTL 0x80000000 /* no pin config need */
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#define IMX_PAD_SION 0x40000000 /* set SION */
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/**
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* @dev: a pointer back to containing device
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* @base: the offset to the controller in virtual memory
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*/
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struct imx_pinctrl {
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struct device *dev;
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struct pinctrl_dev *pctl;
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void __iomem *base;
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void __iomem *input_sel_base;
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struct imx_pinctrl_soc_info *info;
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};
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static inline const struct group_desc *imx_pinctrl_find_group_by_name(
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struct pinctrl_dev *pctldev,
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const char *name)
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{
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const struct group_desc *grp = NULL;
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int i;
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for (i = 0; i < pctldev->num_groups; i++) {
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grp = pinctrl_generic_get_group(pctldev, i);
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if (grp && !strcmp(grp->name, name))
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break;
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}
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return grp;
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}
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static void imx_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
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unsigned offset)
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{
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seq_printf(s, "%s", dev_name(pctldev->dev));
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}
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static int imx_dt_node_to_map(struct pinctrl_dev *pctldev,
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struct device_node *np,
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struct pinctrl_map **map, unsigned *num_maps)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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struct imx_pinctrl_soc_info *info = ipctl->info;
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const struct group_desc *grp;
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struct pinctrl_map *new_map;
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struct device_node *parent;
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int map_num = 1;
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int i, j;
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/*
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* first find the group of this node and check if we need create
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* config maps for pins
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*/
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grp = imx_pinctrl_find_group_by_name(pctldev, np->name);
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if (!grp) {
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dev_err(info->dev, "unable to find group for node %s\n",
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np->name);
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return -EINVAL;
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}
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for (i = 0; i < grp->num_pins; i++) {
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struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
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if (!(pin->config & IMX_NO_PAD_CTL))
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map_num++;
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}
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new_map = kmalloc(sizeof(struct pinctrl_map) * map_num, GFP_KERNEL);
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if (!new_map)
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return -ENOMEM;
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*map = new_map;
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*num_maps = map_num;
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/* create mux map */
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parent = of_get_parent(np);
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if (!parent) {
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kfree(new_map);
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return -EINVAL;
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}
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new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
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new_map[0].data.mux.function = parent->name;
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new_map[0].data.mux.group = np->name;
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of_node_put(parent);
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/* create config map */
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new_map++;
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for (i = j = 0; i < grp->num_pins; i++) {
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struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
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if (!(pin->config & IMX_NO_PAD_CTL)) {
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new_map[j].type = PIN_MAP_TYPE_CONFIGS_PIN;
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new_map[j].data.configs.group_or_pin =
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pin_get_name(pctldev, pin->pin);
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new_map[j].data.configs.configs = &pin->config;
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new_map[j].data.configs.num_configs = 1;
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j++;
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}
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}
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dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
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(*map)->data.mux.function, (*map)->data.mux.group, map_num);
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return 0;
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}
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static void imx_dt_free_map(struct pinctrl_dev *pctldev,
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struct pinctrl_map *map, unsigned num_maps)
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{
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kfree(map);
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}
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static const struct pinctrl_ops imx_pctrl_ops = {
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.get_groups_count = pinctrl_generic_get_group_count,
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.get_group_name = pinctrl_generic_get_group_name,
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.get_group_pins = pinctrl_generic_get_group_pins,
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.pin_dbg_show = imx_pin_dbg_show,
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.dt_node_to_map = imx_dt_node_to_map,
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.dt_free_map = imx_dt_free_map,
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};
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static int imx_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
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unsigned group)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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struct imx_pinctrl_soc_info *info = ipctl->info;
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const struct imx_pin_reg *pin_reg;
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unsigned int npins, pin_id;
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int i;
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struct group_desc *grp = NULL;
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struct function_desc *func = NULL;
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/*
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* Configure the mux mode for each pin in the group for a specific
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* function.
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*/
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grp = pinctrl_generic_get_group(pctldev, group);
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if (!grp)
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return -EINVAL;
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func = pinmux_generic_get_function(pctldev, selector);
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if (!func)
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return -EINVAL;
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npins = grp->num_pins;
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dev_dbg(ipctl->dev, "enable function %s group %s\n",
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func->name, grp->name);
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for (i = 0; i < npins; i++) {
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struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
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pin_id = pin->pin;
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pin_reg = &info->pin_regs[pin_id];
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if (pin_reg->mux_reg == -1) {
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dev_dbg(ipctl->dev, "Pin(%s) does not support mux function\n",
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info->pins[pin_id].name);
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continue;
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}
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if (info->flags & SHARE_MUX_CONF_REG) {
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u32 reg;
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reg = readl(ipctl->base + pin_reg->mux_reg);
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reg &= ~(0x7 << 20);
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reg |= (pin->mux_mode << 20);
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writel(reg, ipctl->base + pin_reg->mux_reg);
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dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
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pin_reg->mux_reg, reg);
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} else {
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writel(pin->mux_mode, ipctl->base + pin_reg->mux_reg);
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dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
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pin_reg->mux_reg, pin->mux_mode);
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}
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/*
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* If the select input value begins with 0xff, it's a quirky
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* select input and the value should be interpreted as below.
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* 31 23 15 7 0
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* | 0xff | shift | width | select |
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* It's used to work around the problem that the select
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* input for some pin is not implemented in the select
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* input register but in some general purpose register.
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* We encode the select input value, width and shift of
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* the bit field into input_val cell of pin function ID
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* in device tree, and then decode them here for setting
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* up the select input bits in general purpose register.
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*/
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if (pin->input_val >> 24 == 0xff) {
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u32 val = pin->input_val;
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u8 select = val & 0xff;
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u8 width = (val >> 8) & 0xff;
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u8 shift = (val >> 16) & 0xff;
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u32 mask = ((1 << width) - 1) << shift;
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/*
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* The input_reg[i] here is actually some IOMUXC general
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* purpose register, not regular select input register.
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*/
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val = readl(ipctl->base + pin->input_reg);
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val &= ~mask;
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val |= select << shift;
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writel(val, ipctl->base + pin->input_reg);
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} else if (pin->input_reg) {
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/*
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* Regular select input register can never be at offset
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* 0, and we only print register value for regular case.
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*/
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if (ipctl->input_sel_base)
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writel(pin->input_val, ipctl->input_sel_base +
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pin->input_reg);
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else
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writel(pin->input_val, ipctl->base +
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pin->input_reg);
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dev_dbg(ipctl->dev,
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"==>select_input: offset 0x%x val 0x%x\n",
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pin->input_reg, pin->input_val);
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}
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}
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return 0;
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}
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static int imx_pmx_gpio_request_enable(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range, unsigned offset)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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struct imx_pinctrl_soc_info *info = ipctl->info;
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const struct imx_pin_reg *pin_reg;
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struct group_desc *grp;
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struct imx_pin *imx_pin;
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unsigned int pin, group;
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u32 reg;
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/* Currently implementation only for shared mux/conf register */
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if (!(info->flags & SHARE_MUX_CONF_REG))
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return 0;
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pin_reg = &info->pin_regs[offset];
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if (pin_reg->mux_reg == -1)
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return -EINVAL;
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/* Find the pinctrl config with GPIO mux mode for the requested pin */
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for (group = 0; group < pctldev->num_groups; group++) {
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grp = pinctrl_generic_get_group(pctldev, group);
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if (!grp)
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continue;
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for (pin = 0; pin < grp->num_pins; pin++) {
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imx_pin = &((struct imx_pin *)(grp->data))[pin];
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if (imx_pin->pin == offset && !imx_pin->mux_mode)
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goto mux_pin;
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}
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}
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return -EINVAL;
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mux_pin:
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reg = readl(ipctl->base + pin_reg->mux_reg);
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reg &= ~(0x7 << 20);
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reg |= imx_pin->config;
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writel(reg, ipctl->base + pin_reg->mux_reg);
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return 0;
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}
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static void imx_pmx_gpio_disable_free(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range, unsigned offset)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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struct imx_pinctrl_soc_info *info = ipctl->info;
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const struct imx_pin_reg *pin_reg;
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u32 reg;
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/*
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* Only Vybrid has the input/output buffer enable flags (IBE/OBE)
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* They are part of the shared mux/conf register.
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*/
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if (!(info->flags & SHARE_MUX_CONF_REG))
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return;
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pin_reg = &info->pin_regs[offset];
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if (pin_reg->mux_reg == -1)
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return;
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/* Clear IBE/OBE/PUE to disable the pin (Hi-Z) */
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reg = readl(ipctl->base + pin_reg->mux_reg);
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reg &= ~0x7;
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writel(reg, ipctl->base + pin_reg->mux_reg);
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}
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static int imx_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range, unsigned offset, bool input)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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struct imx_pinctrl_soc_info *info = ipctl->info;
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const struct imx_pin_reg *pin_reg;
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u32 reg;
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/*
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* Only Vybrid has the input/output buffer enable flags (IBE/OBE)
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* They are part of the shared mux/conf register.
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*/
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if (!(info->flags & SHARE_MUX_CONF_REG))
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return 0;
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pin_reg = &info->pin_regs[offset];
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if (pin_reg->mux_reg == -1)
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return -EINVAL;
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/* IBE always enabled allows us to read the value "on the wire" */
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reg = readl(ipctl->base + pin_reg->mux_reg);
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if (input)
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reg &= ~0x2;
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else
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reg |= 0x2;
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writel(reg, ipctl->base + pin_reg->mux_reg);
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return 0;
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}
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static const struct pinmux_ops imx_pmx_ops = {
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.get_functions_count = pinmux_generic_get_function_count,
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.get_function_name = pinmux_generic_get_function_name,
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.get_function_groups = pinmux_generic_get_function_groups,
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.set_mux = imx_pmx_set,
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.gpio_request_enable = imx_pmx_gpio_request_enable,
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.gpio_disable_free = imx_pmx_gpio_disable_free,
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.gpio_set_direction = imx_pmx_gpio_set_direction,
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};
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/* decode generic config into raw register values */
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static u32 imx_pinconf_decode_generic_config(struct imx_pinctrl *ipctl,
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unsigned long *configs,
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unsigned int num_configs)
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{
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struct imx_pinctrl_soc_info *info = ipctl->info;
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struct imx_cfg_params_decode *decode;
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enum pin_config_param param;
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u32 raw_config = 0;
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u32 param_val;
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int i, j;
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WARN_ON(num_configs > info->num_decodes);
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for (i = 0; i < num_configs; i++) {
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param = pinconf_to_config_param(configs[i]);
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param_val = pinconf_to_config_argument(configs[i]);
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decode = info->decodes;
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for (j = 0; j < info->num_decodes; j++) {
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if (param == decode->param) {
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if (decode->invert)
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param_val = !param_val;
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raw_config |= (param_val << decode->shift)
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& decode->mask;
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break;
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}
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decode++;
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}
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}
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if (info->fixup)
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info->fixup(configs, num_configs, &raw_config);
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return raw_config;
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}
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static u32 imx_pinconf_parse_generic_config(struct device_node *np,
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struct imx_pinctrl *ipctl)
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{
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struct imx_pinctrl_soc_info *info = ipctl->info;
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struct pinctrl_dev *pctl = ipctl->pctl;
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unsigned int num_configs;
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unsigned long *configs;
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int ret;
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if (!info->generic_pinconf)
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return 0;
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ret = pinconf_generic_parse_dt_config(np, pctl, &configs,
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&num_configs);
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if (ret)
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return 0;
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return imx_pinconf_decode_generic_config(ipctl, configs, num_configs);
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}
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static int imx_pinconf_get(struct pinctrl_dev *pctldev,
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unsigned pin_id, unsigned long *config)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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struct imx_pinctrl_soc_info *info = ipctl->info;
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const struct imx_pin_reg *pin_reg = &info->pin_regs[pin_id];
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if (pin_reg->conf_reg == -1) {
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dev_err(info->dev, "Pin(%s) does not support config function\n",
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info->pins[pin_id].name);
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return -EINVAL;
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}
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*config = readl(ipctl->base + pin_reg->conf_reg);
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if (info->flags & SHARE_MUX_CONF_REG)
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*config &= 0xffff;
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return 0;
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}
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static int imx_pinconf_set(struct pinctrl_dev *pctldev,
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unsigned pin_id, unsigned long *configs,
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unsigned num_configs)
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{
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struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
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struct imx_pinctrl_soc_info *info = ipctl->info;
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const struct imx_pin_reg *pin_reg = &info->pin_regs[pin_id];
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int i;
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if (pin_reg->conf_reg == -1) {
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dev_err(info->dev, "Pin(%s) does not support config function\n",
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info->pins[pin_id].name);
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return -EINVAL;
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}
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dev_dbg(ipctl->dev, "pinconf set pin %s\n",
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info->pins[pin_id].name);
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for (i = 0; i < num_configs; i++) {
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if (info->flags & SHARE_MUX_CONF_REG) {
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u32 reg;
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reg = readl(ipctl->base + pin_reg->conf_reg);
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reg &= ~0xffff;
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reg |= configs[i];
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writel(reg, ipctl->base + pin_reg->conf_reg);
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dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
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pin_reg->conf_reg, reg);
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} else {
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writel(configs[i], ipctl->base + pin_reg->conf_reg);
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dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%lx\n",
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pin_reg->conf_reg, configs[i]);
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}
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} /* for each config */
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return 0;
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}
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static void imx_pinconf_dbg_show(struct pinctrl_dev *pctldev,
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struct seq_file *s, unsigned pin_id)
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{
|
|
struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
|
|
struct imx_pinctrl_soc_info *info = ipctl->info;
|
|
const struct imx_pin_reg *pin_reg = &info->pin_regs[pin_id];
|
|
unsigned long config;
|
|
|
|
if (!pin_reg || pin_reg->conf_reg == -1) {
|
|
seq_printf(s, "N/A");
|
|
return;
|
|
}
|
|
|
|
config = readl(ipctl->base + pin_reg->conf_reg);
|
|
seq_printf(s, "0x%lx", config);
|
|
}
|
|
|
|
static void imx_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
|
|
struct seq_file *s, unsigned group)
|
|
{
|
|
struct group_desc *grp;
|
|
unsigned long config;
|
|
const char *name;
|
|
int i, ret;
|
|
|
|
if (group > pctldev->num_groups)
|
|
return;
|
|
|
|
seq_printf(s, "\n");
|
|
grp = pinctrl_generic_get_group(pctldev, group);
|
|
if (!grp)
|
|
return;
|
|
|
|
for (i = 0; i < grp->num_pins; i++) {
|
|
struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
|
|
|
|
name = pin_get_name(pctldev, pin->pin);
|
|
ret = imx_pinconf_get(pctldev, pin->pin, &config);
|
|
if (ret)
|
|
return;
|
|
seq_printf(s, " %s: 0x%lx\n", name, config);
|
|
}
|
|
}
|
|
|
|
static const struct pinconf_ops imx_pinconf_ops = {
|
|
.pin_config_get = imx_pinconf_get,
|
|
.pin_config_set = imx_pinconf_set,
|
|
.pin_config_dbg_show = imx_pinconf_dbg_show,
|
|
.pin_config_group_dbg_show = imx_pinconf_group_dbg_show,
|
|
};
|
|
|
|
/*
|
|
* Each pin represented in fsl,pins consists of 5 u32 PIN_FUNC_ID and
|
|
* 1 u32 CONFIG, so 24 types in total for each pin.
|
|
*/
|
|
#define FSL_PIN_SIZE 24
|
|
#define SHARE_FSL_PIN_SIZE 20
|
|
|
|
static int imx_pinctrl_parse_groups(struct device_node *np,
|
|
struct group_desc *grp,
|
|
struct imx_pinctrl *ipctl,
|
|
u32 index)
|
|
{
|
|
struct imx_pinctrl_soc_info *info = ipctl->info;
|
|
int size, pin_size;
|
|
const __be32 *list;
|
|
int i;
|
|
u32 config;
|
|
|
|
dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
|
|
|
|
if (info->flags & SHARE_MUX_CONF_REG)
|
|
pin_size = SHARE_FSL_PIN_SIZE;
|
|
else
|
|
pin_size = FSL_PIN_SIZE;
|
|
|
|
if (info->generic_pinconf)
|
|
pin_size -= 4;
|
|
|
|
/* Initialise group */
|
|
grp->name = np->name;
|
|
|
|
/*
|
|
* the binding format is fsl,pins = <PIN_FUNC_ID CONFIG ...>,
|
|
* do sanity check and calculate pins number
|
|
*
|
|
* First try legacy 'fsl,pins' property, then fall back to the
|
|
* generic 'pins'.
|
|
*
|
|
* Note: for generic 'pins' case, there's no CONFIG part in
|
|
* the binding format.
|
|
*/
|
|
list = of_get_property(np, "fsl,pins", &size);
|
|
if (!list) {
|
|
list = of_get_property(np, "pins", &size);
|
|
if (!list) {
|
|
dev_err(info->dev,
|
|
"no fsl,pins and pins property in node %s\n",
|
|
np->full_name);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* we do not check return since it's safe node passed down */
|
|
if (!size || size % pin_size) {
|
|
dev_err(info->dev, "Invalid fsl,pins or pins property in node %s\n",
|
|
np->full_name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* first try to parse the generic pin config */
|
|
config = imx_pinconf_parse_generic_config(np, ipctl);
|
|
|
|
grp->num_pins = size / pin_size;
|
|
grp->data = devm_kzalloc(info->dev, grp->num_pins *
|
|
sizeof(struct imx_pin), GFP_KERNEL);
|
|
grp->pins = devm_kzalloc(info->dev, grp->num_pins *
|
|
sizeof(unsigned int), GFP_KERNEL);
|
|
if (!grp->pins || !grp->data)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < grp->num_pins; i++) {
|
|
u32 mux_reg = be32_to_cpu(*list++);
|
|
u32 conf_reg;
|
|
unsigned int pin_id;
|
|
struct imx_pin_reg *pin_reg;
|
|
struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
|
|
|
|
if (!(info->flags & ZERO_OFFSET_VALID) && !mux_reg)
|
|
mux_reg = -1;
|
|
|
|
if (info->flags & SHARE_MUX_CONF_REG) {
|
|
conf_reg = mux_reg;
|
|
} else {
|
|
conf_reg = be32_to_cpu(*list++);
|
|
if (!conf_reg)
|
|
conf_reg = -1;
|
|
}
|
|
|
|
pin_id = (mux_reg != -1) ? mux_reg / 4 : conf_reg / 4;
|
|
pin_reg = &info->pin_regs[pin_id];
|
|
pin->pin = pin_id;
|
|
grp->pins[i] = pin_id;
|
|
pin_reg->mux_reg = mux_reg;
|
|
pin_reg->conf_reg = conf_reg;
|
|
pin->input_reg = be32_to_cpu(*list++);
|
|
pin->mux_mode = be32_to_cpu(*list++);
|
|
pin->input_val = be32_to_cpu(*list++);
|
|
|
|
if (info->generic_pinconf) {
|
|
/* generic pin config decoded */
|
|
pin->config = config;
|
|
} else {
|
|
/* legacy pin config read from devicetree */
|
|
config = be32_to_cpu(*list++);
|
|
|
|
/* SION bit is in mux register */
|
|
if (config & IMX_PAD_SION)
|
|
pin->mux_mode |= IOMUXC_CONFIG_SION;
|
|
pin->config = config & ~IMX_PAD_SION;
|
|
}
|
|
|
|
dev_dbg(info->dev, "%s: 0x%x 0x%08lx", info->pins[pin_id].name,
|
|
pin->mux_mode, pin->config);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int imx_pinctrl_parse_functions(struct device_node *np,
|
|
struct imx_pinctrl *ipctl,
|
|
u32 index)
|
|
{
|
|
struct pinctrl_dev *pctl = ipctl->pctl;
|
|
struct imx_pinctrl_soc_info *info = ipctl->info;
|
|
struct device_node *child;
|
|
struct function_desc *func;
|
|
struct group_desc *grp;
|
|
u32 i = 0;
|
|
|
|
dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
|
|
|
|
func = pinmux_generic_get_function(pctl, index);
|
|
if (!func)
|
|
return -EINVAL;
|
|
|
|
/* Initialise function */
|
|
func->name = np->name;
|
|
func->num_group_names = of_get_child_count(np);
|
|
if (func->num_group_names == 0) {
|
|
dev_err(info->dev, "no groups defined in %s\n", np->full_name);
|
|
return -EINVAL;
|
|
}
|
|
func->group_names = devm_kcalloc(info->dev, func->num_group_names,
|
|
sizeof(char *), GFP_KERNEL);
|
|
if (!func->group_names)
|
|
return -ENOMEM;
|
|
|
|
for_each_child_of_node(np, child) {
|
|
func->group_names[i] = child->name;
|
|
|
|
grp = devm_kzalloc(info->dev, sizeof(struct group_desc),
|
|
GFP_KERNEL);
|
|
if (!grp)
|
|
return -ENOMEM;
|
|
|
|
mutex_lock(&info->mutex);
|
|
radix_tree_insert(&pctl->pin_group_tree,
|
|
info->group_index++, grp);
|
|
mutex_unlock(&info->mutex);
|
|
|
|
imx_pinctrl_parse_groups(child, grp, ipctl, i++);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check if the DT contains pins in the direct child nodes. This indicates the
|
|
* newer DT format to store pins. This function returns true if the first found
|
|
* fsl,pins property is in a child of np. Otherwise false is returned.
|
|
*/
|
|
static bool imx_pinctrl_dt_is_flat_functions(struct device_node *np)
|
|
{
|
|
struct device_node *function_np;
|
|
struct device_node *pinctrl_np;
|
|
|
|
for_each_child_of_node(np, function_np) {
|
|
if (of_property_read_bool(function_np, "fsl,pins"))
|
|
return true;
|
|
|
|
for_each_child_of_node(function_np, pinctrl_np) {
|
|
if (of_property_read_bool(pinctrl_np, "fsl,pins"))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static int imx_pinctrl_probe_dt(struct platform_device *pdev,
|
|
struct imx_pinctrl *ipctl)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct device_node *child;
|
|
struct pinctrl_dev *pctl = ipctl->pctl;
|
|
struct imx_pinctrl_soc_info *info = ipctl->info;
|
|
u32 nfuncs = 0;
|
|
u32 i = 0;
|
|
bool flat_funcs;
|
|
|
|
if (!np)
|
|
return -ENODEV;
|
|
|
|
flat_funcs = imx_pinctrl_dt_is_flat_functions(np);
|
|
if (flat_funcs) {
|
|
nfuncs = 1;
|
|
} else {
|
|
nfuncs = of_get_child_count(np);
|
|
if (nfuncs <= 0) {
|
|
dev_err(&pdev->dev, "no functions defined\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < nfuncs; i++) {
|
|
struct function_desc *function;
|
|
|
|
function = devm_kzalloc(&pdev->dev, sizeof(*function),
|
|
GFP_KERNEL);
|
|
if (!function)
|
|
return -ENOMEM;
|
|
|
|
mutex_lock(&info->mutex);
|
|
radix_tree_insert(&pctl->pin_function_tree, i, function);
|
|
mutex_unlock(&info->mutex);
|
|
}
|
|
pctl->num_functions = nfuncs;
|
|
|
|
info->group_index = 0;
|
|
if (flat_funcs) {
|
|
pctl->num_groups = of_get_child_count(np);
|
|
} else {
|
|
pctl->num_groups = 0;
|
|
for_each_child_of_node(np, child)
|
|
pctl->num_groups += of_get_child_count(child);
|
|
}
|
|
|
|
if (flat_funcs) {
|
|
imx_pinctrl_parse_functions(np, ipctl, 0);
|
|
} else {
|
|
i = 0;
|
|
for_each_child_of_node(np, child)
|
|
imx_pinctrl_parse_functions(child, ipctl, i++);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* imx_free_resources() - free memory used by this driver
|
|
* @info: info driver instance
|
|
*/
|
|
static void imx_free_resources(struct imx_pinctrl *ipctl)
|
|
{
|
|
if (ipctl->pctl)
|
|
pinctrl_unregister(ipctl->pctl);
|
|
}
|
|
|
|
int imx_pinctrl_probe(struct platform_device *pdev,
|
|
struct imx_pinctrl_soc_info *info)
|
|
{
|
|
struct regmap_config config = { .name = "gpr" };
|
|
struct device_node *dev_np = pdev->dev.of_node;
|
|
struct pinctrl_desc *imx_pinctrl_desc;
|
|
struct device_node *np;
|
|
struct imx_pinctrl *ipctl;
|
|
struct resource *res;
|
|
struct regmap *gpr;
|
|
int ret, i;
|
|
|
|
if (!info || !info->pins || !info->npins) {
|
|
dev_err(&pdev->dev, "wrong pinctrl info\n");
|
|
return -EINVAL;
|
|
}
|
|
info->dev = &pdev->dev;
|
|
|
|
if (info->gpr_compatible) {
|
|
gpr = syscon_regmap_lookup_by_compatible(info->gpr_compatible);
|
|
if (!IS_ERR(gpr))
|
|
regmap_attach_dev(&pdev->dev, gpr, &config);
|
|
}
|
|
|
|
/* Create state holders etc for this driver */
|
|
ipctl = devm_kzalloc(&pdev->dev, sizeof(*ipctl), GFP_KERNEL);
|
|
if (!ipctl)
|
|
return -ENOMEM;
|
|
|
|
info->pin_regs = devm_kmalloc(&pdev->dev, sizeof(*info->pin_regs) *
|
|
info->npins, GFP_KERNEL);
|
|
if (!info->pin_regs)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < info->npins; i++) {
|
|
info->pin_regs[i].mux_reg = -1;
|
|
info->pin_regs[i].conf_reg = -1;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
ipctl->base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(ipctl->base))
|
|
return PTR_ERR(ipctl->base);
|
|
|
|
if (of_property_read_bool(dev_np, "fsl,input-sel")) {
|
|
np = of_parse_phandle(dev_np, "fsl,input-sel", 0);
|
|
if (!np) {
|
|
dev_err(&pdev->dev, "iomuxc fsl,input-sel property not found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ipctl->input_sel_base = of_iomap(np, 0);
|
|
of_node_put(np);
|
|
if (!ipctl->input_sel_base) {
|
|
dev_err(&pdev->dev,
|
|
"iomuxc input select base address not found\n");
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
imx_pinctrl_desc = devm_kzalloc(&pdev->dev, sizeof(*imx_pinctrl_desc),
|
|
GFP_KERNEL);
|
|
if (!imx_pinctrl_desc)
|
|
return -ENOMEM;
|
|
|
|
imx_pinctrl_desc->name = dev_name(&pdev->dev);
|
|
imx_pinctrl_desc->pins = info->pins;
|
|
imx_pinctrl_desc->npins = info->npins;
|
|
imx_pinctrl_desc->pctlops = &imx_pctrl_ops;
|
|
imx_pinctrl_desc->pmxops = &imx_pmx_ops;
|
|
imx_pinctrl_desc->confops = &imx_pinconf_ops;
|
|
imx_pinctrl_desc->owner = THIS_MODULE;
|
|
|
|
/* for generic pinconf */
|
|
imx_pinctrl_desc->custom_params = info->custom_params;
|
|
imx_pinctrl_desc->num_custom_params = info->num_custom_params;
|
|
|
|
mutex_init(&info->mutex);
|
|
|
|
ipctl->info = info;
|
|
ipctl->dev = info->dev;
|
|
platform_set_drvdata(pdev, ipctl);
|
|
ret = devm_pinctrl_register_and_init(&pdev->dev,
|
|
imx_pinctrl_desc, ipctl,
|
|
&ipctl->pctl);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "could not register IMX pinctrl driver\n");
|
|
goto free;
|
|
}
|
|
|
|
ret = imx_pinctrl_probe_dt(pdev, ipctl);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "fail to probe dt properties\n");
|
|
goto free;
|
|
}
|
|
|
|
dev_info(&pdev->dev, "initialized IMX pinctrl driver\n");
|
|
|
|
return pinctrl_enable(ipctl->pctl);
|
|
|
|
free:
|
|
imx_free_resources(ipctl);
|
|
|
|
return ret;
|
|
}
|