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.pa...@sifive.com>
---
cmd/Kconfig | 6 +++
cmd/Makefile | 1 +
cmd/pwm.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 126 insertions(+)
create mode 100644 cmd/pwm.c
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 1595de999b..4f3a70b1d5 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
+ PWM support.
+
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..f82f7789cd
--- /dev/null
+++ b/cmd/pwm.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Control PWM channels
+ *
+ * Copyright (c) 2020 SiFive, Inc
+ * author: Pragnesh Patel <pragnesh.pa...@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, period_ns = 0, duty_ns = 0;
+ int ret;
+
+ if (argc < 4)
+ show_usage:
+ return CMD_RET_USAGE;
+
+ str_cmd = argv[1];
+ argc -= 2;
+ argv += 2;
+
+ if (argc > 0) {
+ str_pwm = *argv;
+ argc--;
+ argv++;
+ }
+
+ if (!str_pwm)
+ goto show_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:
+ goto show_usage;
+ }
+
+ if (IS_ENABLED(CONFIG_DM_PWM)) {
+ ret = uclass_get_device_by_name(UCLASS_PWM, str_pwm, &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 {
+ goto show_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!\n");
+ return CMD_RET_FAILURE;
+ }
+
+ printf("success!\n");
+ return CMD_RET_SUCCESS;
+}
+
+U_BOOT_CMD(pwm, 6, 0, do_pwm,
+ "control pwm channels",
+ "pwm <invert> <pwm_device> <channel> <polarity>\n"
+ "pwm <config> <pwm_device> <channel> <period_ns> <duty_ns>\n"
+ "pwm <enable/disable> <pwm_device> <channel>");
--
2.17.1
