Commit 9e9a530a authored by Pragnesh Patel's avatar Pragnesh Patel Committed by Tom Rini
Browse files

cmd: Add a pwm command



Add the command "pwm" for controlling the pwm channels. This
command provides pwm invert/config/enable/disable functionalities
via PWM uclass drivers
Signed-off-by: default avatarPragnesh Patel <pragnesh.patel@sifive.com>
Reviewed-by: Simon Glass's avatarSimon Glass <sjg@chromium.org>
parent 2767d881
......@@ -3153,6 +3153,7 @@ i2c - I2C sub-system
sspi - SPI utility commands
base - print or set address offset
printenv- print environment variables
pwm - control pwm channels
setenv - set environment variables
saveenv - save environment variables to persistent storage
protect - enable or disable FLASH write protection
......
......@@ -928,6 +928,12 @@ config CMD_GPIO
help
GPIO support.
config CMD_PWM
bool "pwm"
depends on DM_PWM
help
Control PWM channels, this allows invert/config/enable/disable PWM channels.
config CMD_GPT
bool "GPT (GUID Partition Table) command"
select EFI_PARTITION
......
......@@ -120,6 +120,7 @@ endif
obj-$(CONFIG_CMD_PINMUX) += pinmux.o
obj-$(CONFIG_CMD_PMC) += pmc.o
obj-$(CONFIG_CMD_PSTORE) += pstore.o
obj-$(CONFIG_CMD_PWM) += pwm.o
obj-$(CONFIG_CMD_PXE) += pxe.o pxe_utils.o
obj-$(CONFIG_CMD_WOL) += wol.o
obj-$(CONFIG_CMD_QFW) += qfw.o
......
// SPDX-License-Identifier: GPL-2.0+
/*
* Control PWM channels
*
* Copyright (c) 2020 SiFive, Inc
* author: Pragnesh Patel <pragnesh.patel@sifive.com>
*/
#include <command.h>
#include <dm.h>
#include <pwm.h>
enum pwm_cmd {
PWM_SET_INVERT,
PWM_SET_CONFIG,
PWM_SET_ENABLE,
PWM_SET_DISABLE,
};
static int do_pwm(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
const char *str_cmd, *str_channel = NULL, *str_enable = NULL;
const char *str_pwm = NULL, *str_period = NULL, *str_duty = NULL;
enum pwm_cmd sub_cmd;
struct udevice *dev;
u32 channel, pwm_enable, pwm_dev, period_ns = 0, duty_ns = 0;
int ret;
if (argc < 4)
return CMD_RET_USAGE;
str_cmd = argv[1];
argc -= 2;
argv += 2;
if (argc > 0) {
str_pwm = *argv;
argc--;
argv++;
}
if (!str_pwm)
return CMD_RET_USAGE;
switch (*str_cmd) {
case 'i':
sub_cmd = PWM_SET_INVERT;
break;
case 'c':
sub_cmd = PWM_SET_CONFIG;
break;
case 'e':
sub_cmd = PWM_SET_ENABLE;
break;
case 'd':
sub_cmd = PWM_SET_DISABLE;
break;
default:
return CMD_RET_USAGE;
}
pwm_dev = simple_strtoul(str_pwm, NULL, 10);
ret = uclass_get_device(UCLASS_PWM, pwm_dev, &dev);
if (ret) {
printf("pwm: '%s' not found\n", str_pwm);
return cmd_process_error(cmdtp, ret);
}
if (argc > 0) {
str_channel = *argv;
channel = simple_strtoul(str_channel, NULL, 10);
argc--;
argv++;
} else {
return CMD_RET_USAGE;
}
if (sub_cmd == PWM_SET_INVERT && argc > 0) {
str_enable = *argv;
pwm_enable = simple_strtoul(str_enable, NULL, 10);
ret = pwm_set_invert(dev, channel, pwm_enable);
} else if (sub_cmd == PWM_SET_CONFIG && argc == 2) {
str_period = *argv;
argc--;
argv++;
period_ns = simple_strtoul(str_period, NULL, 10);
if (argc > 0) {
str_duty = *argv;
duty_ns = simple_strtoul(str_duty, NULL, 10);
}
ret = pwm_set_config(dev, channel, period_ns, duty_ns);
} else if (sub_cmd == PWM_SET_ENABLE) {
ret = pwm_set_enable(dev, channel, 1);
} else if (sub_cmd == PWM_SET_DISABLE) {
ret = pwm_set_enable(dev, channel, 0);
} else {
printf("PWM arguments missing\n");
return CMD_RET_FAILURE;
}
if (ret) {
printf("error(%d)\n", ret);
return CMD_RET_FAILURE;
}
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(pwm, 6, 0, do_pwm,
"control pwm channels",
"pwm <invert> <pwm_dev_num> <channel> <polarity>\n"
"pwm <config> <pwm_dev_num> <channel> <period_ns> <duty_ns>\n"
"pwm <enable/disable> <pwm_dev_num> <channel>\n"
"Note: All input values are in decimal");
......@@ -58,6 +58,7 @@ CONFIG_CMD_LSBLK=y
CONFIG_CMD_MUX=y
CONFIG_CMD_OSD=y
CONFIG_CMD_PCI=y
CONFIG_CMD_PWM=y
CONFIG_CMD_READ=y
CONFIG_CMD_REMOTEPROC=y
CONFIG_CMD_SPI=y
......
......@@ -4,4 +4,5 @@
obj-y += mem.o
obj-$(CONFIG_CMD_MEM_SEARCH) += mem_search.o
obj-$(CONFIG_CMD_PWM) += pwm.o
obj-y += setexpr.o
// SPDX-License-Identifier: GPL-2.0+
/*
* Test for pwm command
*
* Copyright 2020 SiFive, Inc
*
* Authors:
* Pragnesh Patel <pragnesh.patel@sifive.com>
*/
#include <dm.h>
#include <dm/test.h>
#include <test/test.h>
#include <test/ut.h>
/* Basic test of 'pwm' command */
static int dm_test_pwm_cmd(struct unit_test_state *uts)
{
struct udevice *dev;
ut_assertok(uclass_get_device(UCLASS_PWM, 0, &dev));
ut_assertnonnull(dev);
ut_assertok(console_record_reset_enable());
/* pwm <invert> <pwm_dev_num> <channel> <polarity> */
ut_assertok(run_command("pwm invert 0 0 1", 0));
ut_assert_console_end();
ut_assertok(run_command("pwm invert 0 0 0", 0));
ut_assert_console_end();
/* pwm <config> <pwm_dev_num> <channel> <period_ns> <duty_ns> */
ut_assertok(run_command("pwm config 0 0 10 50", 0));
ut_assert_console_end();
/* pwm <enable/disable> <pwm_dev_num> <channel> */
ut_assertok(run_command("pwm enable 0 0", 0));
ut_assert_console_end();
ut_assertok(run_command("pwm disable 0 0", 0));
ut_assert_console_end();
return 0;
}
DM_TEST(dm_test_pwm_cmd, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT | UT_TESTF_CONSOLE_REC);
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment