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Fri, 26 May 2023 18:23:23 +1000 From: Marc Reilly To: barebox@lists.infradead.org Date: Fri, 26 May 2023 18:23:13 +1000 Message-Id: <20230526082313.29694-2-marc@cpdesign.com.au> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230526082313.29694-1-marc@cpdesign.com.au> References: <20230526082313.29694-1-marc@cpdesign.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Authenticated-User: marc@cpdesign.com.au X-Authenticator: dovecot_plain X-Originating-IP: 116.90.56.28 X-SpamExperts-Domain: panthur-sh-outbound0.mailcluster.com.au X-SpamExperts-Username: 116.90.56.28 Authentication-Results: mailcluster.com.au; auth=pass smtp.auth=116.90.56.28@panthur-sh-outbound0.mailcluster.com.au X-SpamExperts-Outgoing-Class: ham X-SpamExperts-Outgoing-Evidence: SB/global_tokens (0.00103441005844) X-Recommended-Action: accept X-Filter-ID: Pt3MvcO5N4iKaDQ5O6lkdGlMVN6RH8bjRMzItlySaT8nuEdQ01YT8Y4D4/UPyIDbPUtbdvnXkggZ 3YnVId/Y5jcf0yeVQAvfjHznO7+bT5zzRQC/PIR0ZeIYukWs6zeuXFWCX8oNdggW7HE9XDTdSavp k7Vp2UXVHEQMIct0liIrm4c/Hw9oiQyf2M9mRpxhswKQDamPN66SYe4XX4xmgJvmHZIaOCPnuqIf UsnKQndaIN+MTJ88TTpoG8fQ5knApuGXed8VjoeeEKguXydrkSpUidRDvhULdPLXIoXP6ZiGKpfT IF8fSxNC0LttVkKWhddHIda+F2OXJibxnCVgq/sDcLC0U2KR6OWH3DJPpNlNxaypTbp28NxghjNo pU/Oaqj4KISIRSJ5MfjE8OaunZEyYYf7TmlI3iEcqXK4A61ChHMQHCMEWTX9HEhwSP4/MSl+mev0 M9cO0xP2892D0Uv5/hXXQF+f2WAemEBBH0NsVeB41VPmQWlT6X4HxPATd38b9MLKMY00g8iKb4Ma HkcFBAvuf345Nnfstl8j+xb35lDPKa+hEyOYER4dYqg19L79JWHANylAmdcW1ioqKAhIbSJTbn3p hW1N8stWViDDh0zYybFfFGb1BguKhGQS1815h2jfNCQvp3x+etU3v+gbaW5naTC7zOfGQeBlb2X7 4O4hBSz/kkmPgL+fgIguuJvpOfcTAKs/W389rtyLn14MySZo15O38qenUYDW2udO1E27e7t+GBYd Grwwk77mzpIiZ3aYsCU80RnzQz1brqcneM2DtFL6lyn3SdWY2VjHp+W1tpo+4KZfjXpfNmlerfOY 3UNVu8TOdjOCr0g4mxFW6BNL/LNNOwdMx+faYopHdCUDK0lwKtLTqkxfwugNwU3HMLc26gkZ9IWu lt9fr6BKwhrOF0A1/P6Dxzn8HmJm4zuNRcgRKiGg7nXFaZTxkthHBBd+1FGtrHfmRLr1mA3ARdV5 AZf6qXuoaniPBKa/K7PRiH9N3uNqUeLkT9H/YAvNrlNPDcRjUdyh4v23HFAB9fsWrjkhC+/VkwPD 61O38M3G5FnJSs4QlaOH81x50MxOKVrDfQzDgqFDumjx949yYjkgur7cbmMvzASyKBHM3xi8wXJI Uf8Y97QTxRrgRfBTyao+gSRn3B4C0WLGZPe4LJ2MyI6lLpoeMdMOO8Y= X-Report-Abuse-To: spam@vmse01.mailcluster.com.au X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230526_012424_613412_8E2A46E0 X-CRM114-Status: GOOD ( 18.17 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.9 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [RFC PATCH 1/1] commands: add pwm manipulation command X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) This introduces a command to set parameters for a pwm device. Signed-off-by: Marc Reilly --- commands/Kconfig | 11 +++++ commands/Makefile | 1 + commands/pwm.c | 111 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 123 insertions(+) create mode 100644 commands/pwm.c diff --git a/commands/Kconfig b/commands/Kconfig index 4d3ff631a8..6b7d0bfd79 100644 --- a/commands/Kconfig +++ b/commands/Kconfig @@ -1929,6 +1929,17 @@ config CMD_I2C -w use word (16 bit) wide access -v verbose + +config CMD_PWM + bool + depends on PWM + prompt "PWM commands: pwm_set" + help + pwm_set - set pwm state + + Usage: i2c_set - set pwm parameters + + config CMD_LED bool depends on LED diff --git a/commands/Makefile b/commands/Makefile index 98625a0373..011ae59427 100644 --- a/commands/Makefile +++ b/commands/Makefile @@ -69,6 +69,7 @@ obj-$(CONFIG_CMD_GPIO) += gpio.o obj-$(CONFIG_CMD_UNCOMPRESS) += uncompress.o obj-$(CONFIG_CMD_I2C) += i2c.o obj-$(CONFIG_CMD_SPI) += spi.o +obj-$(CONFIG_CMD_PWM) += pwm.o obj-$(CONFIG_CMD_MIPI_DBI) += mipi_dbi.o obj-$(CONFIG_CMD_UBI) += ubi.o obj-$(CONFIG_CMD_UBIFORMAT) += ubiformat.o diff --git a/commands/pwm.c b/commands/pwm.c new file mode 100644 index 0000000000..8a26430e19 --- /dev/null +++ b/commands/pwm.c @@ -0,0 +1,111 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +// SPDX-FileCopyrightText: © 2023 Marc Reilly + +/* pwm - pwm commands */ + +#include +#include +#include +#include +#include +#include + +#define HZ_TO_NANOSECONDS(x) (1000000000UL/(x)) + +static int do_pwm_set(int argc, char *argv[]) +{ + struct pwm_device *pwm = NULL; + struct pwm_state state; + int error = 0; + char namebuf[128]; + char *devname = NULL; + int n = -1, polarity = -1, duty = -1, period = -1, freq = -1, opt; + + while ((opt = getopt(argc, argv, "n:d:D:P:f:i:")) > 0) { + switch (opt) { + case 'n': + n = simple_strtol(optarg, NULL, 0); + break; + case 'd': + devname = optarg; + break; + case 'D': + duty = simple_strtol(optarg, NULL, 0); + break; + case 'P': + period = simple_strtol(optarg, NULL, 0); + break; + case 'f': + freq = simple_strtol(optarg, NULL, 0); + break; + case 'i': + polarity = simple_strtol(optarg, NULL, 0); + break; + } + } + + if ((n < 0) && !devname) { + printf(" need to specify a device\n"); + return COMMAND_ERROR_USAGE; + } + if ((freq < 0) && (duty < 0) && (period < 0)) { + printf(" need to know some timing info; freq or dury/period\n"); + return COMMAND_ERROR_USAGE; + } + + if (!devname) { + sprintf(namebuf, "pwm%d", n); + } else { + strcpy(namebuf, devname); + } + + pwm = pwm_request(namebuf); + if (!pwm) { + printf("pwm device %s not found\n", namebuf); + return -ENODEV; + } + + pwm_get_state(pwm, &state); + if (polarity >= 0) + state.polarity = polarity; + + if (freq > 0) { + state.p_enable = true; + state.period_ns = HZ_TO_NANOSECONDS(freq); + pwm_set_relative_duty_cycle(&state, 50, 100); + } else if (duty > 0) { + state.p_enable = true; + state.period_ns = period; + state.duty_ns = duty; + } else { + state.p_enable = false; + } + + error = pwm_apply_state(pwm, &state); + + pwm_free(pwm); + + return error; +} + +BAREBOX_CMD_HELP_START(pwm_read) +BAREBOX_CMD_HELP_TEXT("Sets a pwm device parameters.") +BAREBOX_CMD_HELP_TEXT(" Specify the device either by device name or pwm number") +BAREBOX_CMD_HELP_TEXT(" Timings can either be specified via period + duty (on) duration,") +BAREBOX_CMD_HELP_TEXT(" or via frequency.") +BAREBOX_CMD_HELP_TEXT("Options:") +BAREBOX_CMD_HELP_OPT("-d number\t", "device name (eg 'pwm0')") +BAREBOX_CMD_HELP_OPT("-n number\t", "pwm chip number (default 0)") +BAREBOX_CMD_HELP_OPT("-D number\t", "duty cycle (ns)") +BAREBOX_CMD_HELP_OPT("-P number\t", "period (ns)") +BAREBOX_CMD_HELP_OPT("-f number\t", "frequency (Hz)") +BAREBOX_CMD_HELP_OPT("-i number\t", "line inverted polarity") +BAREBOX_CMD_HELP_END + +BAREBOX_CMD_START(pwm_set) + .cmd = do_pwm_set, + BAREBOX_CMD_DESC("set pwm") + BAREBOX_CMD_OPTS("[-dnDPfp]") + BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP) + BAREBOX_CMD_HELP(cmd_pwm_read_help) +BAREBOX_CMD_END -- 2.35.3