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https://github.com/AsahiLinux/u-boot
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9c6a3c6772
This driver actually does nothing but test pinctrl uclass, and demonstrate how things work. To try this driver, uncomment /* #define DEBUG */ in the drivers/pinctrl/pinctrl-sandbox.c, and debug messages will be displayed. DRAM: 128 MiB sandbox pinmux: group = 1 (serial_a), function = 1 (serial) Using default environment In: cros-ec-keyb Out: lcd Err: lcd Net: Net Initialization Skipped eth0: eth@10002000, eth1: eth@80000000, eth5: eth@90000000 => i2c dev 0 Setting bus to 0 sandbox pinmux: group = 0 (i2c), function = 0 (i2c) sandbox pinconf: group = 0 (i2c), param = 3, arg = 1 Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Simon Glass <sjg@chromium.org>
147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/*
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* Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/* #define DEBUG */
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#include <common.h>
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#include <dm/device.h>
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#include <dm/pinctrl.h>
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static const char * const sandbox_pins[] = {
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"SCL",
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"SDA",
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"TX",
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"RX",
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};
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static const char * const sandbox_groups[] = {
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"i2c",
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"serial_a",
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"serial_b",
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"spi",
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};
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static const char * const sandbox_functions[] = {
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"i2c",
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"serial",
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"spi",
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};
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static const struct pinconf_param sandbox_conf_params[] = {
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{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
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{ "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
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{ "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
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{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
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{ "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
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{ "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
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{ "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
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{ "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
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{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
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{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
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{ "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
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};
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static int sandbox_get_pins_count(struct udevice *dev)
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{
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return ARRAY_SIZE(sandbox_pins);
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}
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static const char *sandbox_get_pin_name(struct udevice *dev, unsigned selector)
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{
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return sandbox_pins[selector];
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}
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static int sandbox_get_groups_count(struct udevice *dev)
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{
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return ARRAY_SIZE(sandbox_groups);
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}
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static const char *sandbox_get_group_name(struct udevice *dev,
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unsigned selector)
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{
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return sandbox_groups[selector];
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}
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static int sandbox_get_functions_count(struct udevice *dev)
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{
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return ARRAY_SIZE(sandbox_functions);
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}
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static const char *sandbox_get_function_name(struct udevice *dev,
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unsigned selector)
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{
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return sandbox_functions[selector];
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}
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static int sandbox_pinmux_set(struct udevice *dev, unsigned pin_selector,
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unsigned func_selector)
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{
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debug("sandbox pinmux: pin = %d (%s), function = %d (%s)\n",
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pin_selector, sandbox_get_pin_name(dev, pin_selector),
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func_selector, sandbox_get_function_name(dev, func_selector));
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return 0;
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}
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static int sandbox_pinmux_group_set(struct udevice *dev,
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unsigned group_selector,
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unsigned func_selector)
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{
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debug("sandbox pinmux: group = %d (%s), function = %d (%s)\n",
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group_selector, sandbox_get_group_name(dev, group_selector),
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func_selector, sandbox_get_function_name(dev, func_selector));
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return 0;
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}
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static int sandbox_pinconf_set(struct udevice *dev, unsigned pin_selector,
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unsigned param, unsigned argument)
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{
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debug("sandbox pinconf: pin = %d (%s), param = %d, arg = %d\n",
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pin_selector, sandbox_get_pin_name(dev, pin_selector),
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param, argument);
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return 0;
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}
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static int sandbox_pinconf_group_set(struct udevice *dev,
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unsigned group_selector,
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unsigned param, unsigned argument)
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{
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debug("sandbox pinconf: group = %d (%s), param = %d, arg = %d\n",
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group_selector, sandbox_get_group_name(dev, group_selector),
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param, argument);
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return 0;
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}
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const struct pinctrl_ops sandbox_pinctrl_ops = {
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.get_pins_count = sandbox_get_pins_count,
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.get_pin_name = sandbox_get_pin_name,
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.get_groups_count = sandbox_get_groups_count,
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.get_group_name = sandbox_get_group_name,
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.get_functions_count = sandbox_get_functions_count,
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.get_function_name = sandbox_get_function_name,
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.pinmux_set = sandbox_pinmux_set,
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.pinmux_group_set = sandbox_pinmux_group_set,
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.pinconf_num_params = ARRAY_SIZE(sandbox_conf_params),
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.pinconf_params = sandbox_conf_params,
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.pinconf_set = sandbox_pinconf_set,
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.pinconf_group_set = sandbox_pinconf_group_set,
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.set_state = pinctrl_generic_set_state,
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};
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static const struct udevice_id sandbox_pinctrl_match[] = {
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{ .compatible = "sandbox,pinctrl" },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(sandbox_pinctrl) = {
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.name = "sandbox_pinctrl",
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.id = UCLASS_PINCTRL,
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.of_match = sandbox_pinctrl_match,
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.ops = &sandbox_pinctrl_ops,
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};
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