| Pragnesh Patel | 1d5955f | 2020-12-22 11:30:05 +0530 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Control PWM channels |
| 4 | * |
| 5 | * Copyright (c) 2020 SiFive, Inc |
| 6 | * author: Pragnesh Patel <pragnesh.patel@sifive.com> |
| 7 | */ |
| 8 | |
| 9 | #include <command.h> |
| 10 | #include <dm.h> |
| 11 | #include <pwm.h> |
| 12 | |
| 13 | enum pwm_cmd { |
| 14 | PWM_SET_INVERT, |
| 15 | PWM_SET_CONFIG, |
| 16 | PWM_SET_ENABLE, |
| 17 | PWM_SET_DISABLE, |
| 18 | }; |
| 19 | |
| 20 | static int do_pwm(struct cmd_tbl *cmdtp, int flag, int argc, |
| 21 | char *const argv[]) |
| 22 | { |
| 23 | const char *str_cmd, *str_channel = NULL, *str_enable = NULL; |
| 24 | const char *str_pwm = NULL, *str_period = NULL, *str_duty = NULL; |
| 25 | enum pwm_cmd sub_cmd; |
| 26 | struct udevice *dev; |
| 27 | u32 channel, pwm_enable, pwm_dev, period_ns = 0, duty_ns = 0; |
| 28 | int ret; |
| 29 | |
| 30 | if (argc < 4) |
| 31 | return CMD_RET_USAGE; |
| 32 | |
| 33 | str_cmd = argv[1]; |
| 34 | argc -= 2; |
| 35 | argv += 2; |
| 36 | |
| 37 | if (argc > 0) { |
| 38 | str_pwm = *argv; |
| 39 | argc--; |
| 40 | argv++; |
| 41 | } |
| 42 | |
| 43 | if (!str_pwm) |
| 44 | return CMD_RET_USAGE; |
| 45 | |
| 46 | switch (*str_cmd) { |
| 47 | case 'i': |
| 48 | sub_cmd = PWM_SET_INVERT; |
| 49 | break; |
| 50 | case 'c': |
| 51 | sub_cmd = PWM_SET_CONFIG; |
| 52 | break; |
| 53 | case 'e': |
| 54 | sub_cmd = PWM_SET_ENABLE; |
| 55 | break; |
| 56 | case 'd': |
| 57 | sub_cmd = PWM_SET_DISABLE; |
| 58 | break; |
| 59 | default: |
| 60 | return CMD_RET_USAGE; |
| 61 | } |
| 62 | |
| 63 | pwm_dev = simple_strtoul(str_pwm, NULL, 10); |
| 64 | ret = uclass_get_device(UCLASS_PWM, pwm_dev, &dev); |
| 65 | if (ret) { |
| 66 | printf("pwm: '%s' not found\n", str_pwm); |
| 67 | return cmd_process_error(cmdtp, ret); |
| 68 | } |
| 69 | |
| 70 | if (argc > 0) { |
| 71 | str_channel = *argv; |
| 72 | channel = simple_strtoul(str_channel, NULL, 10); |
| 73 | argc--; |
| 74 | argv++; |
| 75 | } else { |
| 76 | return CMD_RET_USAGE; |
| 77 | } |
| 78 | |
| 79 | if (sub_cmd == PWM_SET_INVERT && argc > 0) { |
| 80 | str_enable = *argv; |
| 81 | pwm_enable = simple_strtoul(str_enable, NULL, 10); |
| 82 | ret = pwm_set_invert(dev, channel, pwm_enable); |
| 83 | } else if (sub_cmd == PWM_SET_CONFIG && argc == 2) { |
| 84 | str_period = *argv; |
| 85 | argc--; |
| 86 | argv++; |
| 87 | period_ns = simple_strtoul(str_period, NULL, 10); |
| 88 | |
| 89 | if (argc > 0) { |
| 90 | str_duty = *argv; |
| 91 | duty_ns = simple_strtoul(str_duty, NULL, 10); |
| 92 | } |
| 93 | |
| 94 | ret = pwm_set_config(dev, channel, period_ns, duty_ns); |
| 95 | } else if (sub_cmd == PWM_SET_ENABLE) { |
| 96 | ret = pwm_set_enable(dev, channel, 1); |
| 97 | } else if (sub_cmd == PWM_SET_DISABLE) { |
| 98 | ret = pwm_set_enable(dev, channel, 0); |
| 99 | } else { |
| 100 | printf("PWM arguments missing\n"); |
| 101 | return CMD_RET_FAILURE; |
| 102 | } |
| 103 | |
| 104 | if (ret) { |
| 105 | printf("error(%d)\n", ret); |
| 106 | return CMD_RET_FAILURE; |
| 107 | } |
| 108 | |
| 109 | return CMD_RET_SUCCESS; |
| 110 | } |
| 111 | |
| 112 | U_BOOT_CMD(pwm, 6, 0, do_pwm, |
| 113 | "control pwm channels", |
| 114 | "pwm <invert> <pwm_dev_num> <channel> <polarity>\n" |
| 115 | "pwm <config> <pwm_dev_num> <channel> <period_ns> <duty_ns>\n" |
| 116 | "pwm <enable/disable> <pwm_dev_num> <channel>\n" |
| 117 | "Note: All input values are in decimal"); |