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: Pragnesh Patel pragnesh.patel@sifive.com ---
Changes in v3: - Replace goto with return - Print return value for error - Change the assert condition for success
Changes in v2: - Add test for pwm command
README | 1 + cmd/Kconfig | 6 ++ cmd/Makefile | 1 + cmd/pwm.c | 117 ++++++++++++++++++++++++++++++++++++++ configs/sandbox_defconfig | 1 + test/cmd/Makefile | 1 + test/cmd/pwm.c | 47 +++++++++++++++ 7 files changed, 174 insertions(+) create mode 100644 cmd/pwm.c create mode 100644 test/cmd/pwm.c
diff --git a/README b/README index cb49aa15da..dab291e0d0 100644 --- a/README +++ b/README @@ -3160,6 +3160,7 @@ 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 diff --git a/cmd/Kconfig b/cmd/Kconfig index 1595de999b..0d085108f4 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -918,6 +918,12 @@ 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 diff --git a/cmd/Makefile b/cmd/Makefile index dd86675bf2..75df3c136c 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -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 diff --git a/cmd/pwm.c b/cmd/pwm.c new file mode 100644 index 0000000000..5849fc57b6 --- /dev/null +++ b/cmd/pwm.c @@ -0,0 +1,117 @@ +// 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"); diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig index f2a767a4cd..7a16603461 100644 --- a/configs/sandbox_defconfig +++ b/configs/sandbox_defconfig @@ -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 diff --git a/test/cmd/Makefile b/test/cmd/Makefile index 859dcda239..dde98dd371 100644 --- a/test/cmd/Makefile +++ b/test/cmd/Makefile @@ -4,3 +4,4 @@
obj-y += mem.o obj-$(CONFIG_CMD_MEM_SEARCH) += mem_search.o +obj-$(CONFIG_CMD_PWM) += pwm.o diff --git a/test/cmd/pwm.c b/test/cmd/pwm.c new file mode 100644 index 0000000000..3cc1aaffd4 --- /dev/null +++ b/test/cmd/pwm.c @@ -0,0 +1,47 @@ +// 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> */ + run_command("pwm invert 0 0 1", 0); + ut_assert_console_end(); + + run_command("pwm invert 0 0 0", 0); + ut_assert_console_end(); + + /* pwm <config> <pwm_dev_num> <channel> <period_ns> <duty_ns> */ + run_command("pwm config 0 0 period_ns duty_ns", 0); + ut_assert_console_end(); + + /* pwm <enable/disable> <pwm_dev_num> <channel> */ + run_command("pwm enable 0 0", 0); + ut_assert_console_end(); + + 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);