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96495d90fe
Add driver model support for GPIOs. Since existing GPIO drivers do not use driver model, this feature must be enabled by CONFIG_DM_GPIO. After all GPO drivers are converted over we can perhaps remove this config. Tests are provided for the sandbox implementation, and are a sufficient sanity check for basic operation. The GPIO uclass understands the concept of named banks of GPIOs, with each GPIO device providing a single bank. Within each bank the GPIOs are numbered using an offset from 0 to n-1. For example a bank named 'b' with 20 offsets will provide GPIOs named b0 to b19. Anonymous GPIO banks are also supported, and are just numbered without any prefix. Each time a GPIO driver is added to the uclass, the GPIOs are renumbered accordinging, so there is always a global GPIO numbering order. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com> Signed-off-by: Viktor Křivák <viktor.krivak@gmail.com> Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>
111 lines
3.4 KiB
C
111 lines
3.4 KiB
C
/*
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* Copyright (C) 2013 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <dm.h>
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#include <dm/ut.h>
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#include <dm/test.h>
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#include <dm/util.h>
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#include <asm/gpio.h>
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/* Test that sandbox GPIOs work correctly */
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static int dm_test_gpio(struct dm_test_state *dms)
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{
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unsigned int offset, gpio;
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struct dm_gpio_ops *ops;
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struct device *dev;
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const char *name;
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int offset_count;
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char buf[80];
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/*
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* We expect to get 3 banks. One is anonymous (just numbered) and
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* comes from platdata. The other two are named a (20 gpios)
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* and b (10 gpios) and come from the device tree. See
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* test/dm/test.dts.
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*/
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ut_assertok(gpio_lookup_name("b4", &dev, &offset, &gpio));
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ut_asserteq_str(dev->name, "extra-gpios");
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ut_asserteq(4, offset);
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ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 20 + 4, gpio);
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name = gpio_get_bank_info(dev, &offset_count);
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ut_asserteq_str("b", name);
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ut_asserteq(10, offset_count);
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/* Get the operations for this device */
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ops = gpio_get_ops(dev);
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ut_assert(ops->get_state);
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/* Cannot get a value until it is reserved */
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ut_asserteq(-1, ops->get_value(dev, offset));
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/*
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* Now some tests that use the 'sandbox' back door. All GPIOs
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* should default to input, include b4 that we are using here.
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*/
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ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
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ut_asserteq_str("b4: in: 0 [ ]", buf);
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/* Change it to an output */
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sandbox_gpio_set_direction(dev, offset, 1);
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ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
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ut_asserteq_str("b4: out: 0 [ ]", buf);
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sandbox_gpio_set_value(dev, offset, 1);
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ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
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ut_asserteq_str("b4: out: 1 [ ]", buf);
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ut_assertok(ops->request(dev, offset, "testing"));
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ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
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ut_asserteq_str("b4: out: 1 [x] testing", buf);
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/* Change the value a bit */
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ut_asserteq(1, ops->get_value(dev, offset));
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ut_assertok(ops->set_value(dev, offset, 0));
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ut_asserteq(0, ops->get_value(dev, offset));
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ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
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ut_asserteq_str("b4: out: 0 [x] testing", buf);
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ut_assertok(ops->set_value(dev, offset, 1));
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ut_asserteq(1, ops->get_value(dev, offset));
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/* Make it an input */
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ut_assertok(ops->direction_input(dev, offset));
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ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
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ut_asserteq_str("b4: in: 1 [x] testing", buf);
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sandbox_gpio_set_value(dev, offset, 0);
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ut_asserteq(0, sandbox_gpio_get_value(dev, offset));
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ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
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ut_asserteq_str("b4: in: 0 [x] testing", buf);
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ut_assertok(ops->free(dev, offset));
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ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
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ut_asserteq_str("b4: in: 0 [ ]", buf);
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/* Check the 'a' bank also */
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ut_assertok(gpio_lookup_name("a15", &dev, &offset, &gpio));
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ut_asserteq_str(dev->name, "base-gpios");
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ut_asserteq(15, offset);
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ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 15, gpio);
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name = gpio_get_bank_info(dev, &offset_count);
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ut_asserteq_str("a", name);
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ut_asserteq(20, offset_count);
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/* And the anonymous bank */
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ut_assertok(gpio_lookup_name("14", &dev, &offset, &gpio));
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ut_asserteq_str(dev->name, "gpio_sandbox");
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ut_asserteq(14, offset);
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ut_asserteq(14, gpio);
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name = gpio_get_bank_info(dev, &offset_count);
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ut_asserteq_ptr(NULL, name);
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ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT, offset_count);
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return 0;
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}
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DM_TEST(dm_test_gpio, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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