u-boot/drivers/pinctrl/broadcom/pinctrl-bcm6838.c
Simon Glass 41575d8e4c dm: treewide: Rename auto_alloc_size members to be shorter
This construct is quite long-winded. In earlier days it made some sense
since auto-allocation was a strange concept. But with driver model now
used pretty universally, we can shorten this to 'auto'. This reduces
verbosity and makes it easier to read.

Coincidentally it also ensures that every declaration is on one line,
thus making dtoc's job easier.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 08:00:25 -07:00

162 lines
4.1 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <common.h>
#include <dm.h>
#include <regmap.h>
#include <syscon.h>
#include <dm/device_compat.h>
#include <dm/pinctrl.h>
#define BCM6838_CMD_LOAD_MUX 0x21
#define BCM6838_FUNC_OFFS 12
#define BCM6838_FUNC_MASK (0x37 << BCM6838_FUNC_OFFS)
#define BCM6838_PIN_OFFS 0
#define BCM6838_PIN_MASK (0xfff << BCM6838_PIN_OFFS)
#define BCM6838_MAX_PIN_NAME_LEN 8
static char bcm6838_pin_name[BCM6838_MAX_PIN_NAME_LEN];
#define BCM6838_MAX_FUNC_NAME_LEN 8
static char bcm6838_func_name[BCM6838_MAX_FUNC_NAME_LEN];
struct bcm6838_test_port_hw {
unsigned long port_blk_data1;
unsigned long port_blk_data2;
unsigned long port_command;
};
static const struct bcm6838_test_port_hw bcm6838_hw = {
.port_blk_data1 = 0x10,
.port_blk_data2 = 0x14,
.port_command = 0x18
};
struct bcm6838_pinctrl_priv {
const struct bcm6838_test_port_hw *hw;
struct regmap *regmap;
u32 pins_count;
u32 functions_count;
};
int bcm6838_pinctrl_get_pins_count(struct udevice *dev)
{
struct bcm6838_pinctrl_priv *priv = dev_get_priv(dev);
return priv->pins_count;
}
const char *bcm6838_pinctrl_get_pin_name(struct udevice *dev,
unsigned int selector)
{
snprintf(bcm6838_pin_name, BCM6838_MAX_PIN_NAME_LEN, "%u", selector);
return bcm6838_pin_name;
}
int bcm6838_pinctrl_get_functions_count(struct udevice *dev)
{
struct bcm6838_pinctrl_priv *priv = dev_get_priv(dev);
return priv->functions_count;
}
const char *bcm6838_pinctrl_get_function_name(struct udevice *dev,
unsigned int selector)
{
snprintf(bcm6838_func_name, BCM6838_MAX_FUNC_NAME_LEN, "%u", selector);
return bcm6838_func_name;
}
int bcm6838_pinctrl_pinmux_set(struct udevice *dev,
unsigned int pin_selector,
unsigned int func_selector)
{
struct bcm6838_pinctrl_priv *priv = dev_get_priv(dev);
const struct bcm6838_test_port_hw *hw = priv->hw;
unsigned int data;
regmap_write(priv->regmap, hw->port_blk_data1, 0);
data = (func_selector << BCM6838_FUNC_OFFS) & BCM6838_FUNC_MASK;
data |= (pin_selector << BCM6838_PIN_OFFS) & BCM6838_PIN_MASK;
regmap_write(priv->regmap, hw->port_blk_data2, data);
regmap_write(priv->regmap, hw->port_command, BCM6838_CMD_LOAD_MUX);
return 0;
}
int bcm6838_pinctrl_probe(struct udevice *dev)
{
struct bcm6838_pinctrl_priv *priv = dev_get_priv(dev);
const struct bcm6838_test_port_hw *hw =
(const struct bcm6838_test_port_hw *)dev_get_driver_data(dev);
int err;
u32 phandle;
ofnode node;
err = ofnode_read_u32(dev_ofnode(dev), "regmap", &phandle);
if (err) {
dev_err(dev, "%s: unable to read regmap\n", __func__);
goto out;
}
node = ofnode_get_by_phandle(phandle);
if (!ofnode_valid(node)) {
dev_err(dev, "%s: unable to find node\n", __func__);
err = -EINVAL;
goto out;
}
priv->regmap = syscon_node_to_regmap(node);
if (!priv->regmap) {
dev_err(dev, "%s: unable to find regmap\n", __func__);
err = -ENODEV;
goto out;
}
err = ofnode_read_u32(dev_ofnode(dev), "brcm,pins-count",
&priv->pins_count);
if (err) {
dev_err(dev, "%s: unable to read brcm,pins-count\n",
__func__);
goto out;
}
err = ofnode_read_u32(dev_ofnode(dev), "brcm,functions-count",
&priv->functions_count);
if (err) {
dev_err(dev, "%s: unable to read brcm,functions-count\n",
__func__);
goto out;
}
priv->hw = hw;
out:
return err;
}
const struct pinctrl_ops bcm6838_pinctrl_ops = {
.set_state = pinctrl_generic_set_state,
.get_pins_count = bcm6838_pinctrl_get_pins_count,
.get_pin_name = bcm6838_pinctrl_get_pin_name,
.get_functions_count = bcm6838_pinctrl_get_functions_count,
.get_function_name = bcm6838_pinctrl_get_function_name,
.pinmux_set = bcm6838_pinctrl_pinmux_set,
};
static const struct udevice_id bcm6838_pinctrl_match[] = {
{
.compatible = "brcm,bcm6838-pinctrl",
.data = (ulong)&bcm6838_hw,
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(bcm6838_pinctrl) = {
.name = "bcm6838_pinctrl",
.id = UCLASS_PINCTRL,
.of_match = bcm6838_pinctrl_match,
.ops = &bcm6838_pinctrl_ops,
.priv_auto = sizeof(struct bcm6838_pinctrl_priv),
.probe = bcm6838_pinctrl_probe,
};