From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 61E31189BA6; Tue, 22 Oct 2024 09:04:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729587868; cv=none; b=NJq75SCmMfb3VaH86PEGEnWwxYY/lbsVb4PLhLeGQC8G6hb+WjpEh3OkuJIrbH1nKNgUq9SKSK9JGjirk3Ohez4kg27bJYjJe8tlC3V05sOp44CPfm92LeCliUEGqhbRX592PCWeChbvsrZX1lIVdVUY3VQSPBUOhUXPnl0Kug8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729587868; c=relaxed/simple; bh=FmDcReTPKUUV7YiJm+WOnQgrY+OEHQUfuIC7c1n0nYk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=JfAgOLHJokdIzme0MWxo99+iUT29Bm9vsx8OWP/nsPZ2CG1UONryJ+fqBkWpBHwgNp8MvgLsyBivVk807NktIW6wXTdsZJVNzgN9yju/PfSmBeGYSFB36EuE2YEWpX1ntVHqpDePBIhSHI/jLc9/kC/WBFlM6OmWv8dv+LKmwfk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [223.64.68.52]) by gateway (Coremail) with SMTP id _____8BxeeGVahdnsL4EAA--.10942S3; Tue, 22 Oct 2024 17:04:21 +0800 (CST) Received: from localhost.localdomain (unknown [223.64.68.52]) by front1 (Coremail) with SMTP id qMiowMAx7uCQahdnKy4HAA--.42603S2; Tue, 22 Oct 2024 17:04:17 +0800 (CST) From: Binbin Zhou To: Binbin Zhou , Huacai Chen , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Juxin Gao Cc: Huacai Chen , linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, Xuerui Wang , loongarch@lists.linux.dev, Sean Young , Binbin Zhou Subject: [PATCH v7 0/2] pwm: Introduce pwm driver for the Loongson family chips Date: Tue, 22 Oct 2024 17:04:13 +0800 Message-ID: X-Mailer: git-send-email 2.43.5 Precedence: bulk X-Mailing-List: linux-pwm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowMAx7uCQahdnKy4HAA--.42603S2 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj93XoWxCr48WF4DXw4DGF4kury7CFX_yoW5Cr47pF ZrC343Kr10qr10yrs3J348Cr1SvayrJF9rGFsay348X3yUCw4jqw4SgF45JFZrAr129F42 vrZ3CFWjka4UuFXCm3ZEXasCq-sJn29KB7ZKAUJUUUUr529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUB2b4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_JFI_Gr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AK xVW8Jr0_Cr1UM2kKe7AKxVWUXVWUAwAS0I0E0xvYzxvE52x082IY62kv0487Mc804VCY07 AIYIkI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWU XVWUAwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7V AKI48JMxkF7I0En4kS14v26r126r1DMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY 6r1j6r4UMxCIbckI1I0E14v26r1Y6r17MI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7 xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xII jxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVWUJVW8JwCI42IY6xAIw2 0EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x02 67AKxVWUJVW8JbIYCTnIWIevJa73UjIFyTuYvjxUc9a9UUUUU Hi all: This patchset introduce a generic PWM framework driver for Loongson family. Each PWM has one pulse width output signal and one pulse input signal to be measured. It can be found on Loongson-2K series cpus and Loongson LS7A bridge chips. Thanks. ------- V7: Thanks for Sean's advice. patch (2/2): - Set chip->atomic to keep pwm_apply_atomic() can be used with the pwm. - Test with CONFIG_PWM_DEBUG and CONFIG_DEBUG_ATOMIC_SLEEP enabled. Link to V6: https://lore.kernel.org/all/cover.1728463622.git.zhoubinbin@loongson.cn/ V6: patch (2/2): - Rebase on pwm/for-next; - Add Reference Manual; - Shortcut if !pwm->state.enabled; - When state->enabled is true, unconditionally execute pwm_loongson_set_polarity() to avoid that the polarity register is not set correctly. Link to V5: https://lore.kernel.org/all/cover.1720516327.git.zhoubinbin@loongson.cn/ V5: patch (2/2): - Rebase on pwm/for-next; - Test with PWM_DEBUG enabled. - In pwm_loongson_apply(), the pwm state is determined before the pwm polarity, avoid test failures when PWM_DEBUG is enabled; - Added DIV64_U64_ROUND_UP in pwm_loongson_get_state() to avoid precision loss and to avoid test failures when PWM_DEBUG is enabled. Link to V4: https://lore.kernel.org/all/cover.1716795485.git.zhoubinbin@loongson.cn/ V4: patch (2/2): - Rebase on pwm/for-next; - Addressed Uwe's review comments: - Make use of devm_pwmchip_alloc() function; - Add Limitations description; - Add LOONGSON_ prefix for Loongson pwm register defines; - Keep regs written only once; - Rewrite duty/period calculation; - Add dev_err_probe() in .probe(); - Fix some code style. Link to V3: https://lore.kernel.org/linux-pwm/cover.1713164810.git.zhoubinbin@loongson.cn/ V3: patch (1/2): - Add Reviewed-by tag from Krzysztof, thanks. patch (2/2): - Several code stlye adjustments, such as line breaks. Link to V2: https://lore.kernel.org/all/cover.1712732719.git.zhoubinbin@loongson.cn/ v2: - Remove the dts-related patches and update dts at once after all relevant drivers are complete. patch (1/2): - The dt-binding filename should match compatible, rename it as loongson,ls7a-pwm.yaml; - Update binding description; - Add description for each pwm cell; - Drop '#pwm-cells' from required, for pwm.yaml makes it required already. Link to v1: https://lore.kernel.org/linux-pwm/cover.1711953223.git.zhoubinbin@loongson.cn/ Binbin Zhou (2): dt-bindings: pwm: Add Loongson PWM controller pwm: Add Loongson PWM controller support .../bindings/pwm/loongson,ls7a-pwm.yaml | 66 ++++ MAINTAINERS | 7 + drivers/pwm/Kconfig | 12 + drivers/pwm/Makefile | 1 + drivers/pwm/pwm-loongson.c | 288 ++++++++++++++++++ 5 files changed, 374 insertions(+) create mode 100644 Documentation/devicetree/bindings/pwm/loongson,ls7a-pwm.yaml create mode 100644 drivers/pwm/pwm-loongson.c base-commit: c13bce43b32b06f2273c7961940c391cdaf13d1e -- 2.43.5