From patchwork Fri Nov 4 13:23:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roger Quadros X-Patchwork-Id: 13031846 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 53862C4332F for ; Fri, 4 Nov 2022 13:23:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230527AbiKDNX2 (ORCPT ); Fri, 4 Nov 2022 09:23:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231328AbiKDNX0 (ORCPT ); Fri, 4 Nov 2022 09:23:26 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 15B63110A; Fri, 4 Nov 2022 06:23:23 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 9C8C5B82CFE; Fri, 4 Nov 2022 13:23:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D922BC433D6; Fri, 4 Nov 2022 13:23:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667568200; bh=hiVOrDmoo5mWY3jYeQIALAtM77QmIzCznqlGhLcSSZw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bRDTjUQ3BFkrXQAkrw/QsX25wtrfyvqmHRyRUdq6kQqgSgsagM29GZw5sNTs4kfrW gxvLFcoe8YpTwoXFEE5fI2Fbe/SQMY4KrkrOKwkM4hmpyVWsrgN27O57v/ZMVJHCqS FO/kHHfGN/i+EPSjB8liHyO6ymCOiWrQgaKmqzMJHyCA/v9BWrBZABU8hFkT7zoPJz Kqi/sZveTwL1FUnFX+O++F8w0JzJJ2ZY7m0EDnIKTUV+gMYIY/uAaOErEIp3xT+ZtW 5qEiRb89UxPPm88GBymXumT+76hCx4O18xdaPe6Noth/gRJT6vjjKfXF/ONgKafJro wi35s7HM5ou1Q== From: Roger Quadros To: davem@davemloft.net Cc: edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, vigneshr@ti.com, vibhore@ti.com, srk@ti.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Roger Quadros Subject: [PATCH 1/5] net: ethernet: ti: am65-cpsw/cpts: Add suspend/resume helpers Date: Fri, 4 Nov 2022 15:23:06 +0200 Message-Id: <20221104132310.31577-2-rogerq@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221104132310.31577-1-rogerq@kernel.org> References: <20221104132310.31577-1-rogerq@kernel.org> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org CPTS looses context on suspend (e.g. on AM62). Provide suspend/resume hooks in CPTS driver. These will be invoked by CPSW driver if CPTS was instantiated by CPSW. Signed-off-by: Roger Quadros --- drivers/net/ethernet/ti/am65-cpts.c | 76 +++++++++++++++++++++++++++++ drivers/net/ethernet/ti/am65-cpts.h | 10 ++++ 2 files changed, 86 insertions(+) diff --git a/drivers/net/ethernet/ti/am65-cpts.c b/drivers/net/ethernet/ti/am65-cpts.c index e2f0fb286143..7f928c343426 100644 --- a/drivers/net/ethernet/ti/am65-cpts.c +++ b/drivers/net/ethernet/ti/am65-cpts.c @@ -176,6 +176,16 @@ struct am65_cpts { u32 genf_enable; u32 hw_ts_enable; struct sk_buff_head txq; + /* context save/restore */ + u64 sr_cpts_ns; + u64 sr_ktime_ns; + u32 sr_control; + u32 sr_int_enable; + u32 sr_rftclk_sel; + u32 sr_ts_ppm_hi; + u32 sr_ts_ppm_low; + struct am65_genf_regs sr_genf[AM65_CPTS_GENF_MAX_NUM]; + struct am65_genf_regs sr_estf[AM65_CPTS_ESTF_MAX_NUM]; }; struct am65_cpts_skb_cb_data { @@ -1029,6 +1039,72 @@ struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs, } EXPORT_SYMBOL_GPL(am65_cpts_create); +void am65_cpts_suspend(struct am65_cpts *cpts) +{ + /* save state and disable CPTS */ + cpts->sr_control = am65_cpts_read32(cpts, control); + cpts->sr_int_enable = am65_cpts_read32(cpts, int_enable); + cpts->sr_rftclk_sel = am65_cpts_read32(cpts, rftclk_sel); + cpts->sr_ts_ppm_hi = am65_cpts_read32(cpts, ts_ppm_hi); + cpts->sr_ts_ppm_low = am65_cpts_read32(cpts, ts_ppm_low); + cpts->sr_cpts_ns = am65_cpts_gettime(cpts, NULL); + cpts->sr_ktime_ns = ktime_to_ns(ktime_get_real()); + am65_cpts_disable(cpts); + clk_disable(cpts->refclk); + + /* Save GENF state */ + memcpy_fromio(&cpts->sr_genf, &cpts->reg->genf, sizeof(cpts->sr_genf)); + + /* Save ESTF state */ + memcpy_fromio(&cpts->sr_estf, &cpts->reg->estf, sizeof(cpts->sr_estf)); +} +EXPORT_SYMBOL_GPL(am65_cpts_suspend); + +void am65_cpts_resume(struct am65_cpts *cpts) +{ + int i; + s64 ktime_ns; + + /* restore state and enable CPTS */ + clk_enable(cpts->refclk); + am65_cpts_write32(cpts, cpts->sr_rftclk_sel, rftclk_sel); + am65_cpts_set_add_val(cpts); + am65_cpts_write32(cpts, cpts->sr_control, control); + am65_cpts_write32(cpts, cpts->sr_int_enable, int_enable); + + /* Restore time to saved CPTS time + time in suspend/resume */ + ktime_ns = ktime_to_ns(ktime_get_real()); + ktime_ns -= cpts->sr_ktime_ns; + am65_cpts_settime(cpts, cpts->sr_cpts_ns + ktime_ns); + + /* Restore compensation (PPM) */ + am65_cpts_write32(cpts, cpts->sr_ts_ppm_hi, ts_ppm_hi); + am65_cpts_write32(cpts, cpts->sr_ts_ppm_low, ts_ppm_low); + + /* Restore GENF state */ + for (i = 0; i < AM65_CPTS_GENF_MAX_NUM; i++) { + am65_cpts_write32(cpts, 0, genf[i].length); /* TRM sequence */ + am65_cpts_write32(cpts, cpts->sr_genf[i].comp_hi, genf[i].comp_hi); + am65_cpts_write32(cpts, cpts->sr_genf[i].comp_lo, genf[i].comp_lo); + am65_cpts_write32(cpts, cpts->sr_genf[i].length, genf[i].length); + am65_cpts_write32(cpts, cpts->sr_genf[i].control, genf[i].control); + am65_cpts_write32(cpts, cpts->sr_genf[i].ppm_hi, genf[i].ppm_hi); + am65_cpts_write32(cpts, cpts->sr_genf[i].ppm_low, genf[i].ppm_low); + } + + /* Restore ESTTF state */ + for (i = 0; i < AM65_CPTS_ESTF_MAX_NUM; i++) { + am65_cpts_write32(cpts, 0, estf[i].length); /* TRM sequence */ + am65_cpts_write32(cpts, cpts->sr_estf[i].comp_hi, estf[i].comp_hi); + am65_cpts_write32(cpts, cpts->sr_estf[i].comp_lo, estf[i].comp_lo); + am65_cpts_write32(cpts, cpts->sr_estf[i].length, estf[i].length); + am65_cpts_write32(cpts, cpts->sr_estf[i].control, estf[i].control); + am65_cpts_write32(cpts, cpts->sr_estf[i].ppm_hi, estf[i].ppm_hi); + am65_cpts_write32(cpts, cpts->sr_estf[i].ppm_low, estf[i].ppm_low); + } +} +EXPORT_SYMBOL_GPL(am65_cpts_resume); + static int am65_cpts_probe(struct platform_device *pdev) { struct device_node *node = pdev->dev.of_node; diff --git a/drivers/net/ethernet/ti/am65-cpts.h b/drivers/net/ethernet/ti/am65-cpts.h index cf9fbc28fd03..bd08f4b2edd2 100644 --- a/drivers/net/ethernet/ti/am65-cpts.h +++ b/drivers/net/ethernet/ti/am65-cpts.h @@ -28,6 +28,8 @@ u64 am65_cpts_ns_gettime(struct am65_cpts *cpts); int am65_cpts_estf_enable(struct am65_cpts *cpts, int idx, struct am65_cpts_estf_cfg *cfg); void am65_cpts_estf_disable(struct am65_cpts *cpts, int idx); +void am65_cpts_suspend(struct am65_cpts *cpts); +void am65_cpts_resume(struct am65_cpts *cpts); #else static inline struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs, @@ -69,6 +71,14 @@ static inline int am65_cpts_estf_enable(struct am65_cpts *cpts, int idx, static inline void am65_cpts_estf_disable(struct am65_cpts *cpts, int idx) { } + +static inline void am65_cpts_suspend(struct am65_cpts *cpts) +{ +} + +static inline void am65_cpts_resume(struct am65_cpts *cpts) +{ +} #endif #endif /* K3_CPTS_H_ */