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(unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 946D73F762; Tue, 27 Feb 2024 11:48:50 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, peng.fan@oss.nxp.com, michal.simek@amd.com, quic_sibis@quicinc.com, quic_nkela@quicinc.com, mturquette@baylibre.com, sboyd@kernel.org, souvik.chakravarty@arm.com, Cristian Marussi , linux-clk@vger.kernel.org Subject: [PATCH 1/5] clk: scmi: Allocate CLK operations dynamically Date: Tue, 27 Feb 2024 19:48:08 +0000 Message-ID: <20240227194812.1209532-2-cristian.marussi@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240227194812.1209532-1-cristian.marussi@arm.com> References: <20240227194812.1209532-1-cristian.marussi@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792082843511773128 X-GMAIL-MSGID: 1792082843511773128 SCMI Clocks descriptors expose an increasing number of properties, thing which, in turn, leads to a varying set of supported CLK operations to be associated with each clock. Providing statically pre-defined CLK operations structs for all the possible combinations of allowed clock features is becoming cumbersome and error-prone. Allocate the per-clock operations descriptors dynamically and populate it with the strictly needed set of operations depending on the advertised clock properties: one descriptor is created for each distinct combination of clock operations, so minimizing the number of clk_ops structures to the strictly minimum needed. CC: Michael Turquette CC: Stephen Boyd CC: linux-clk@vger.kernel.org Signed-off-by: Cristian Marussi --- drivers/clk/clk-scmi.c | 163 ++++++++++++++++++++++++++++------------- 1 file changed, 114 insertions(+), 49 deletions(-) diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c index 8cbe24789c24..d5d369b052bd 100644 --- a/drivers/clk/clk-scmi.c +++ b/drivers/clk/clk-scmi.c @@ -2,7 +2,7 @@ /* * System Control and Power Interface (SCMI) Protocol based clock driver * - * Copyright (C) 2018-2022 ARM Ltd. + * Copyright (C) 2018-2024 ARM Ltd. */ #include @@ -16,6 +16,14 @@ #define NOT_ATOMIC false #define ATOMIC true +enum scmi_clk_feats { + SCMI_CLK_ATOMIC_SUPPORTED, + SCMI_CLK_MAX_FEATS +}; + +#define SCMI_MAX_CLK_OPS (1 << SCMI_CLK_MAX_FEATS) + +static const struct clk_ops *clk_ops_db[SCMI_MAX_CLK_OPS]; static const struct scmi_clk_proto_ops *scmi_proto_clk_ops; struct scmi_clk { @@ -158,42 +166,6 @@ static int scmi_clk_atomic_is_enabled(struct clk_hw *hw) return !!enabled; } -/* - * We can provide enable/disable/is_enabled atomic callbacks only if the - * underlying SCMI transport for an SCMI instance is configured to handle - * SCMI commands in an atomic manner. - * - * When no SCMI atomic transport support is available we instead provide only - * the prepare/unprepare API, as allowed by the clock framework when atomic - * calls are not available. - * - * Two distinct sets of clk_ops are provided since we could have multiple SCMI - * instances with different underlying transport quality, so they cannot be - * shared. - */ -static const struct clk_ops scmi_clk_ops = { - .recalc_rate = scmi_clk_recalc_rate, - .round_rate = scmi_clk_round_rate, - .set_rate = scmi_clk_set_rate, - .prepare = scmi_clk_enable, - .unprepare = scmi_clk_disable, - .set_parent = scmi_clk_set_parent, - .get_parent = scmi_clk_get_parent, - .determine_rate = scmi_clk_determine_rate, -}; - -static const struct clk_ops scmi_atomic_clk_ops = { - .recalc_rate = scmi_clk_recalc_rate, - .round_rate = scmi_clk_round_rate, - .set_rate = scmi_clk_set_rate, - .enable = scmi_clk_atomic_enable, - .disable = scmi_clk_atomic_disable, - .is_enabled = scmi_clk_atomic_is_enabled, - .set_parent = scmi_clk_set_parent, - .get_parent = scmi_clk_get_parent, - .determine_rate = scmi_clk_determine_rate, -}; - static int scmi_clk_ops_init(struct device *dev, struct scmi_clk *sclk, const struct clk_ops *scmi_ops) { @@ -230,6 +202,106 @@ static int scmi_clk_ops_init(struct device *dev, struct scmi_clk *sclk, return ret; } +/** + * scmi_clk_ops_alloc() - Alloc and configure clock operations + * @dev: A device reference for devres + * @feats_key: A bitmap representing the desired clk_ops capabilities. + * + * Allocate and configure a proper set of clock operations depending on the + * specifically required SCMI clock features. + * + * Return: A pointer to the allocated and configured clk_ops on Success, + * or NULL on allocation failure. + */ +static const struct clk_ops * +scmi_clk_ops_alloc(struct device *dev, unsigned long feats_key) +{ + struct clk_ops *ops; + + ops = devm_kzalloc(dev, sizeof(*ops), GFP_KERNEL); + if (!ops) + return NULL; + /* + * We can provide enable/disable/is_enabled atomic callbacks only if the + * underlying SCMI transport for an SCMI instance is configured to + * handle SCMI commands in an atomic manner. + * + * When no SCMI atomic transport support is available we instead provide + * only the prepare/unprepare API, as allowed by the clock framework + * when atomic calls are not available. + */ + if (feats_key & BIT(SCMI_CLK_ATOMIC_SUPPORTED)) { + ops->enable = scmi_clk_atomic_enable; + ops->disable = scmi_clk_atomic_disable; + ops->is_enabled = scmi_clk_atomic_is_enabled; + } else { + ops->prepare = scmi_clk_enable; + ops->unprepare = scmi_clk_disable; + } + + /* Rate ops */ + ops->recalc_rate = scmi_clk_recalc_rate; + ops->round_rate = scmi_clk_round_rate; + ops->determine_rate = scmi_clk_determine_rate; + ops->set_rate = scmi_clk_set_rate; + + /* Parent ops */ + ops->get_parent = scmi_clk_get_parent; + ops->set_parent = scmi_clk_set_parent; + + return ops; +} + +/** + * scmi_clk_ops_select() - Select a proper set of clock operations + * @sclk: A reference to an SCMI clock descriptor + * @atomic_capable: A flag to indicate if atomic mode is supported by the + * transport + * @atomic_threshold: Platform atomic threshold value + * + * After having built a bitmap descriptor to represent the set of features + * needed by this SCMI clock, at first use it to lookup into the set of + * previously allocated clk_ops to check if a suitable combination of clock + * operations was already created; when no match is found allocate a brand new + * set of clk_ops satisfying the required combination of features and save it + * for future references. + * + * In this way only one set of clk_ops is ever created for each different + * combination that is effectively needed. + * + * Return: A pointer to the allocated and configured clk_ops on Success, or + * NULL otherwise. + */ +static const struct clk_ops * +scmi_clk_ops_select(struct scmi_clk *sclk, bool atomic_capable, + unsigned int atomic_threshold) +{ + const struct scmi_clock_info *ci = sclk->info; + unsigned int feats_key = 0; + const struct clk_ops *ops; + + /* + * Note that when transport is atomic but SCMI protocol did not + * specify (or support) an enable_latency associated with a + * clock, we default to use atomic operations mode. + */ + if (atomic_capable && ci->enable_latency <= atomic_threshold) + feats_key |= BIT(SCMI_CLK_ATOMIC_SUPPORTED); + + /* Lookup previously allocated ops */ + ops = clk_ops_db[feats_key]; + if (!ops) { + ops = scmi_clk_ops_alloc(sclk->dev, feats_key); + if (!ops) + return NULL; + + /* Store new ops combinations */ + clk_ops_db[feats_key] = ops; + } + + return ops; +} + static int scmi_clocks_probe(struct scmi_device *sdev) { int idx, count, err; @@ -285,16 +357,10 @@ static int scmi_clocks_probe(struct scmi_device *sdev) sclk->ph = ph; sclk->dev = dev; - /* - * Note that when transport is atomic but SCMI protocol did not - * specify (or support) an enable_latency associated with a - * clock, we default to use atomic operations mode. - */ - if (is_atomic && - sclk->info->enable_latency <= atomic_threshold) - scmi_ops = &scmi_atomic_clk_ops; - else - scmi_ops = &scmi_clk_ops; + scmi_ops = scmi_clk_ops_select(sclk, is_atomic, + atomic_threshold); + if (!scmi_ops) + return -ENOMEM; /* Initialize clock parent data. */ if (sclk->info->num_parents > 0) { @@ -318,8 +384,7 @@ static int scmi_clocks_probe(struct scmi_device *sdev) } else { dev_dbg(dev, "Registered clock:%s%s\n", sclk->info->name, - scmi_ops == &scmi_atomic_clk_ops ? - " (atomic ops)" : ""); + scmi_ops->enable ? " (atomic ops)" : ""); hws[idx] = &sclk->hw; } } From patchwork Tue Feb 27 19:48:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 207401 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:a81b:b0:108:e6aa:91d0 with SMTP id bq27csp2928291dyb; Tue, 27 Feb 2024 11:49:25 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCVZUyhLY0gdVaycMx1FYYjEX0U3teR6RM37/OM26/Xhm7jYilckVck83GK0TO/tOFHg24T2N6mfoA/kEhRB3dBbsd47YA== X-Google-Smtp-Source: AGHT+IFSjqMRCxmajaF5CgpM4LQW0W372vObyg0uBLwXr7OuXgn+noRkMo+79eyzo/gfimfr7mED X-Received: by 2002:ac8:5a01:0:b0:42e:7b65:cee1 with SMTP id n1-20020ac85a01000000b0042e7b65cee1mr710102qta.5.1709063365620; Tue, 27 Feb 2024 11:49:25 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709063365; cv=pass; d=google.com; s=arc-20160816; b=lQyNRy6CEWXpP2Y8OGRtEPFJs2WKjArBEa5zIEXkt588O1Gaa+lBUs7hXlO78uSTFM ntafN5AiAsv3R2Xi4+JhnvOBJGMJyd7fbTQRucqaCRhCFFGVM3rYBG2SEuKKJjMUPUY5 a1X3a5sr7T9S3pVeXUb1I3OO+5RXKkA/wxjJ8xvqp7/2tzrtFIMd3TbVBgNgE6Wfh8+s jD6HPLYhiEHbOS2MFMbH5GHfAWR0e5I3VAoIH8MFS+yUh+5L32SnqfcBw3mCmaAN6Qww HE0yuaDjeS9LPSHtB5BL/SYRqSGDoM7boOgRGyDXA4oq+8ZrY74C2X6FfDCbiE4oAa/H zZHw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:in-reply-to:message-id :date:subject:cc:to:from; bh=Y1nwbGvN1shjq9zCHV9/pRB5cyuSvB53RAOjHBuBNWc=; fh=lZw7wsydj1sihtIy9YlkCXchAJ1lGlW2inIc4DTCWzg=; b=q8hkj8sKJyhsA/HWuYnlQiKYyXPDwuQSpg27OZ/frH9IqwSS/ZiZZji5K8wGzpBUq0 3mIS/ySuTNVpLQgWDPD1Cf7EAlIHEKxullC33dHcnPmnnXG4BHozxbyYFsn2tN4UxGt/ +EFBBjqUo8J5vICen3TtTgkvluKfWFWvG5bR/vrdU7dH5sd8h+JmAaIRJ2seGB+sNd3P z39HOzwpETevMV1FfA4D1gwGBcCe7WZ68GRFdLfag1HPsoAWXZ2APwGvyCQBLItiNFwZ FOHMZ5ttNzgHHVy3TH6SmmmsmTCvs3c52d0FjBav9BLWe8MoSGOQkl1elo1/gDuIkNTB kiBw==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; arc=pass (i=1 spf=pass spfdomain=arm.com dmarc=pass fromdomain=arm.com); spf=pass (google.com: domain of linux-kernel+bounces-83951-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-83951-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from ny.mirrors.kernel.org (ny.mirrors.kernel.org. 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(unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7AF823F762; Tue, 27 Feb 2024 11:48:53 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, peng.fan@oss.nxp.com, michal.simek@amd.com, quic_sibis@quicinc.com, quic_nkela@quicinc.com, mturquette@baylibre.com, sboyd@kernel.org, souvik.chakravarty@arm.com, Cristian Marussi , linux-clk@vger.kernel.org Subject: [PATCH 2/5] clk: scmi: Add support for state control restricted clocks Date: Tue, 27 Feb 2024 19:48:09 +0000 Message-ID: <20240227194812.1209532-3-cristian.marussi@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240227194812.1209532-1-cristian.marussi@arm.com> References: <20240227194812.1209532-1-cristian.marussi@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792082827548665874 X-GMAIL-MSGID: 1792082827548665874 Some exposed SCMI Clocks could be marked as non-supporting state changes. Configure a clk_ops descriptor which does not provide the state change callbacks for such clocks when registering with CLK framework. CC: Michael Turquette CC: Stephen Boyd CC: linux-clk@vger.kernel.org Signed-off-by: Cristian Marussi --- drivers/clk/clk-scmi.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c index d5d369b052bd..fc9603988d91 100644 --- a/drivers/clk/clk-scmi.c +++ b/drivers/clk/clk-scmi.c @@ -18,6 +18,7 @@ enum scmi_clk_feats { SCMI_CLK_ATOMIC_SUPPORTED, + SCMI_CLK_STATE_CTRL_FORBIDDEN, SCMI_CLK_MAX_FEATS }; @@ -230,15 +231,19 @@ scmi_clk_ops_alloc(struct device *dev, unsigned long feats_key) * only the prepare/unprepare API, as allowed by the clock framework * when atomic calls are not available. */ - if (feats_key & BIT(SCMI_CLK_ATOMIC_SUPPORTED)) { - ops->enable = scmi_clk_atomic_enable; - ops->disable = scmi_clk_atomic_disable; - ops->is_enabled = scmi_clk_atomic_is_enabled; - } else { - ops->prepare = scmi_clk_enable; - ops->unprepare = scmi_clk_disable; + if (!(feats_key & BIT(SCMI_CLK_STATE_CTRL_FORBIDDEN))) { + if (feats_key & BIT(SCMI_CLK_ATOMIC_SUPPORTED)) { + ops->enable = scmi_clk_atomic_enable; + ops->disable = scmi_clk_atomic_disable; + } else { + ops->prepare = scmi_clk_enable; + ops->unprepare = scmi_clk_disable; + } } + if (feats_key & BIT(SCMI_CLK_ATOMIC_SUPPORTED)) + ops->is_enabled = scmi_clk_atomic_is_enabled; + /* Rate ops */ ops->recalc_rate = scmi_clk_recalc_rate; ops->round_rate = scmi_clk_round_rate; @@ -288,6 +293,9 @@ scmi_clk_ops_select(struct scmi_clk *sclk, bool atomic_capable, if (atomic_capable && ci->enable_latency <= atomic_threshold) feats_key |= BIT(SCMI_CLK_ATOMIC_SUPPORTED); + if (ci->state_ctrl_forbidden) + feats_key |= BIT(SCMI_CLK_STATE_CTRL_FORBIDDEN); + /* Lookup previously allocated ops */ ops = clk_ops_db[feats_key]; if (!ops) { From patchwork Tue Feb 27 19:48:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 207403 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:a81b:b0:108:e6aa:91d0 with SMTP id bq27csp2928497dyb; Tue, 27 Feb 2024 11:49:54 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCWs4oDSU+zoTEVhWkGPNlp++os8gUu7unf4xiuwg5FwPBqzBaMCpUb+WIaKgH88pK/BtUiDVY+o/vOl5LqjgehV01099Q== X-Google-Smtp-Source: AGHT+IHncqaDXWR6ydVntrQ4/wdT/gWYtkhrtELqNB1TOC4btWL+sb7rgf5NMrT5xbZwlPd40oWg X-Received: by 2002:a05:620a:346:b0:787:ba6c:65c3 with SMTP id t6-20020a05620a034600b00787ba6c65c3mr3012935qkm.21.1709063394754; Tue, 27 Feb 2024 11:49:54 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709063394; cv=pass; d=google.com; s=arc-20160816; b=aBVR38N7RWkIuahnxg5Maj/J3hcCnnre6YYBxCR10mXX4ePPODpkjObXPApbfFTsq5 KBKCtOFsPB1Epd+CvjId37+2A6Pg8LtueQ55br7Tap+EC/wGzJByJ9mRxu+EwnL+zgtV sjcOZ6yfJaU8NZHc0Kdm9Yfy7CYBxCjafOvx5K+zZ/h4fznRmWMHzBVOYFJow7exubkM QjbEl0j7Opna4d6ksmPLfbfa25/NNkFv0+fE0t0x2OlrC4PaEmRgS7SsyJwIPjPAGIpq OXcl4yqnqRhjZQiMiRpPWUm4V3XfDQ9l/44DFI5edfP91D106AkgWQSvyS+4chnMEUNS JAhg== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:in-reply-to:message-id :date:subject:cc:to:from; bh=m3RBM/TQJ767gmNx+XDgPe1aVoufKRPvrw9tTuJXp4M=; fh=lZw7wsydj1sihtIy9YlkCXchAJ1lGlW2inIc4DTCWzg=; b=eEWMXXJzlnd0SGCZuSdM+SNl3ttghBrtEgFTNkmdR668GubClVblBKXp5y7RdUYQUA OhqO2+ugxgtvy65nOqY30pkgdcaJC8naNwnuU/pjjajvlyzFuQWbLy9ZCwYA3PN5UOiA 9lp+9GvN6yFrDHc4PPT99kqFGQDzU/3f4cEkCUNrQzAjSJ9/q8ACEO49fRI1zEdKs7Ct 1K75pTbfgL1hNKOhp6819oG6Kt/+cWtOoq+OZdTSoEENhIJe4LhvFP2cnPu/Zh6SFi/Y QCn1dRWsv3WKbWh5/7qbGpv0H+vYTe8y8bKD6v1rudS9e/QqNX15k6YQmCqy6vuFsBW4 qnRg==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; arc=pass (i=1 spf=pass spfdomain=arm.com dmarc=pass fromdomain=arm.com); spf=pass (google.com: domain of linux-kernel+bounces-83954-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-83954-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from ny.mirrors.kernel.org (ny.mirrors.kernel.org. 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(unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 490503F762; Tue, 27 Feb 2024 11:48:56 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, peng.fan@oss.nxp.com, michal.simek@amd.com, quic_sibis@quicinc.com, quic_nkela@quicinc.com, mturquette@baylibre.com, sboyd@kernel.org, souvik.chakravarty@arm.com, Cristian Marussi , linux-clk@vger.kernel.org Subject: [PATCH 3/5] clk: scmi: Add support for rate change restricted clocks Date: Tue, 27 Feb 2024 19:48:10 +0000 Message-ID: <20240227194812.1209532-4-cristian.marussi@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240227194812.1209532-1-cristian.marussi@arm.com> References: <20240227194812.1209532-1-cristian.marussi@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792082857796345859 X-GMAIL-MSGID: 1792082857796345859 Some exposed SCMI Clocks could be marked as non-supporting rate changes. Configure a clk_ops descriptors which does not provide the rate change callbacks for such clocks when registering with CLK framework. CC: Michael Turquette CC: Stephen Boyd CC: linux-clk@vger.kernel.org Signed-off-by: Cristian Marussi --- drivers/clk/clk-scmi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c index fc9603988d91..d20dcc60f9d1 100644 --- a/drivers/clk/clk-scmi.c +++ b/drivers/clk/clk-scmi.c @@ -19,6 +19,7 @@ enum scmi_clk_feats { SCMI_CLK_ATOMIC_SUPPORTED, SCMI_CLK_STATE_CTRL_FORBIDDEN, + SCMI_CLK_RATE_CTRL_FORBIDDEN, SCMI_CLK_MAX_FEATS }; @@ -248,7 +249,8 @@ scmi_clk_ops_alloc(struct device *dev, unsigned long feats_key) ops->recalc_rate = scmi_clk_recalc_rate; ops->round_rate = scmi_clk_round_rate; ops->determine_rate = scmi_clk_determine_rate; - ops->set_rate = scmi_clk_set_rate; + if (!(feats_key & BIT(SCMI_CLK_RATE_CTRL_FORBIDDEN))) + ops->set_rate = scmi_clk_set_rate; /* Parent ops */ ops->get_parent = scmi_clk_get_parent; @@ -296,6 +298,9 @@ scmi_clk_ops_select(struct scmi_clk *sclk, bool atomic_capable, if (ci->state_ctrl_forbidden) feats_key |= BIT(SCMI_CLK_STATE_CTRL_FORBIDDEN); + if (ci->rate_ctrl_forbidden) + feats_key |= BIT(SCMI_CLK_RATE_CTRL_FORBIDDEN); + /* Lookup previously allocated ops */ ops = clk_ops_db[feats_key]; if (!ops) { From patchwork Tue Feb 27 19:48:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 207404 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:a81b:b0:108:e6aa:91d0 with SMTP id bq27csp2928575dyb; Tue, 27 Feb 2024 11:50:06 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCWA8EpH6rFNZcTOeYyd3Xe45fBTC++Hmf6VfIOQ6FLG3czV56vd1IRLIZryYMSlkpLZCFwOqiz8FPN2e3V+sxB6+pzl5A== X-Google-Smtp-Source: AGHT+IFAqBgEK+Wh41Rpe9jfQ+LNc1u8sXq7Wim1qjitPCTQsMsidooYJc6WhQ2Lm2hf5vFABNIN X-Received: by 2002:a17:902:eccb:b0:1dc:a282:365f with SMTP id a11-20020a170902eccb00b001dca282365fmr7557699plh.40.1709063406437; Tue, 27 Feb 2024 11:50:06 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709063406; cv=pass; d=google.com; s=arc-20160816; b=GUsjQeShm78CeINAAbETV0xyRw1nB3T6PNxSOPA32MpwAZVx/tjBHJOSHM3tzH0t6l 4hVXkJj8/U3bJuna9OTT7v8jzKoQkdVXrsUqd+61+OMUCi88UWaF3MiElDbIjF9bow6e 2zmjr/Y0IiKBgme/qHq6omf5E3jYDW0jP7zW6/ZV4RSW8zzxP3dEmCrxlSQXUz3ecA3j HvHdkw/EOYAVqWlV5qDRnsd60DIvxGCOnZGydEdePM146YbfqDBVygV+iHjphQEK7fO+ D1QycyA4RNdgdj2d7kG05WSmur0j2g6QZyprfE5dM5dsqj8R7b2EBPJY7U1eq5lrWzHR +EgA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:in-reply-to:message-id :date:subject:cc:to:from; bh=6Jr+Xw1XeJgoXE4bZ3hcZk3CQfpBXtjA7EqtvF597sk=; fh=lZw7wsydj1sihtIy9YlkCXchAJ1lGlW2inIc4DTCWzg=; b=EbiYSMA0cdFZAM33yodmyHiF/096aFkRLVIizwT11XLjhPJBkcpJyQNTjy2KRmiuuY AZ6eO6yT8wDJjaDo3SFTfQpPLLYCns1pcKUvB86wY/8yh3LU4tnIdHZ5OH3TXvhw7xdf om595NV+a7FLDyw0mD/8KffDOFdAzpUMipQwKXnlAfL+rjDwWzO629KTXqkH23FB2Zew sz1slSWaoVHOlqkLpS11vtQ9wUyP07Nxmx2l672f8alN88XhvD0OOHb29coHYNi+Gocm JimRyq4PjWmmFQTA8m+wAi33G5IPZyuuiBx+6OYgJ0a6eEmn8cmXpNN4YX0EUeTx3TwO 70XA==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; arc=pass (i=1 spf=pass spfdomain=arm.com dmarc=pass fromdomain=arm.com); spf=pass (google.com: domain of linux-kernel+bounces-83955-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-83955-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. 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(unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2CE243F762; Tue, 27 Feb 2024 11:48:59 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, peng.fan@oss.nxp.com, michal.simek@amd.com, quic_sibis@quicinc.com, quic_nkela@quicinc.com, mturquette@baylibre.com, sboyd@kernel.org, souvik.chakravarty@arm.com, Cristian Marussi , linux-clk@vger.kernel.org Subject: [PATCH 4/5] clk: scmi: Add support for re-parenting restricted clocks Date: Tue, 27 Feb 2024 19:48:11 +0000 Message-ID: <20240227194812.1209532-5-cristian.marussi@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240227194812.1209532-1-cristian.marussi@arm.com> References: <20240227194812.1209532-1-cristian.marussi@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792082870366956135 X-GMAIL-MSGID: 1792082870366956135 Some exposed SCMI Clocks could be marked as non-supporting re-parenting changes. Configure a clk_ops descriptor which does not provide the re-parenting callbacks for such clocks when registering with CLK framework. CC: Michael Turquette CC: Stephen Boyd CC: linux-clk@vger.kernel.org Signed-off-by: Cristian Marussi --- drivers/clk/clk-scmi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c index d20dcc60f9d1..87e968b6c095 100644 --- a/drivers/clk/clk-scmi.c +++ b/drivers/clk/clk-scmi.c @@ -20,6 +20,7 @@ enum scmi_clk_feats { SCMI_CLK_ATOMIC_SUPPORTED, SCMI_CLK_STATE_CTRL_FORBIDDEN, SCMI_CLK_RATE_CTRL_FORBIDDEN, + SCMI_CLK_PARENT_CTRL_FORBIDDEN, SCMI_CLK_MAX_FEATS }; @@ -254,7 +255,8 @@ scmi_clk_ops_alloc(struct device *dev, unsigned long feats_key) /* Parent ops */ ops->get_parent = scmi_clk_get_parent; - ops->set_parent = scmi_clk_set_parent; + if (!(feats_key & BIT(SCMI_CLK_PARENT_CTRL_FORBIDDEN))) + ops->set_parent = scmi_clk_set_parent; return ops; } @@ -301,6 +303,9 @@ scmi_clk_ops_select(struct scmi_clk *sclk, bool atomic_capable, if (ci->rate_ctrl_forbidden) feats_key |= BIT(SCMI_CLK_RATE_CTRL_FORBIDDEN); + if (ci->parent_ctrl_forbidden) + feats_key |= BIT(SCMI_CLK_PARENT_CTRL_FORBIDDEN); + /* Lookup previously allocated ops */ ops = clk_ops_db[feats_key]; if (!ops) { From patchwork Tue Feb 27 19:48:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 207405 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:a81b:b0:108:e6aa:91d0 with SMTP id bq27csp2928653dyb; Tue, 27 Feb 2024 11:50:17 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCUPgt6ic6ncfw0kXSUzPWyOxbQU/CSbPOH3nnJDCJvC55Fo3tybsR7/JZWkH5uYu8hrJ0rYBkiNiKdLYFCrrAFcQQsLMA== X-Google-Smtp-Source: AGHT+IGPE+FGAq8+PnAbVeO/g2HkGTs4ra0nvduw+eZ7we5bqly39E/b/w+kDKL5wPfVccJeN7PZ X-Received: by 2002:a50:ed9a:0:b0:566:131b:5b5f with SMTP id h26-20020a50ed9a000000b00566131b5b5fmr3573106edr.26.1709063417650; Tue, 27 Feb 2024 11:50:17 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709063417; cv=pass; d=google.com; s=arc-20160816; b=QqVNKNHgejFi1DLlHiXGKET0l1aNcAfL6fN+OiNw4qf9ZRU/K6aOFy/Q5M417CTVvD 8qQ9JKL788KaY+0VUz3vEJn2z4yfg1M1JaFg4d2NjXviVutn+uLmwv+1I10TSZ5we/Rw hhCF9eF+uxikSHYiOifWqxwVO5Y/5mC6su8hxvkBup1l6i/KzDseIyj8+PkHPZWi0x1E kWR3B1DO/8Y0r5qVbt7vqXjcA4ixyHW8BfMjJrRzMJiAaVamUPziG++K4pekWnvILy5u qhgfknx8uSWCkokJNP3HrWiEyomcZQ8B4zcjbg38/BuEnNXG8EYTnlkOs9liGZiBipm3 YZhw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:in-reply-to:message-id :date:subject:cc:to:from; bh=SW5eiq/Ld1MQ/BTqB64pJtVEMVUMC9sJLkMTkfvcA+s=; fh=lZw7wsydj1sihtIy9YlkCXchAJ1lGlW2inIc4DTCWzg=; b=0+e/PlkS2zAJK0B7rGLgGo1JKOY/lQaIY9cgOnrKNw52s29lQIkjQoIUwupcgbTEJd Nmm9C026A9WqphB5JfehUFDBzKiNoOn5NOIyB8QxY/x105u1rYvdPOgjrhaWA/YVhmrS KARUBvF9LGi/isNBmJql4RQV+2epVChhsS7cr4rE7hbCsmg/bYiq/uQc9E8H4RzC4fYq MqLhlk0GyeqkHw5zDuyneu2Bq85si1aRxofCOALuagJUTtVchexX1mAwno0v0Qfej3eV cB80y3HdF+HcDMR+7yk6KjCvtWmLLzfl3OI2nQJYLcAS+JILu2jTMyLrI5fWhAtOojXt KuOA==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; arc=pass (i=1 spf=pass spfdomain=arm.com dmarc=pass fromdomain=arm.com); spf=pass (google.com: domain of linux-kernel+bounces-83956-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-83956-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from am.mirrors.kernel.org (am.mirrors.kernel.org. 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(unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E06773F762; Tue, 27 Feb 2024 11:49:01 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, peng.fan@oss.nxp.com, michal.simek@amd.com, quic_sibis@quicinc.com, quic_nkela@quicinc.com, mturquette@baylibre.com, sboyd@kernel.org, souvik.chakravarty@arm.com, Cristian Marussi , linux-clk@vger.kernel.org Subject: [PATCH 5/5] clk: scmi: Add support for get/set duty_cycle operations Date: Tue, 27 Feb 2024 19:48:12 +0000 Message-ID: <20240227194812.1209532-6-cristian.marussi@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240227194812.1209532-1-cristian.marussi@arm.com> References: <20240227194812.1209532-1-cristian.marussi@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792082881975521707 X-GMAIL-MSGID: 1792082881975521707 Provide the CLK framework callbacks related to get/set clock duty cycle if the related SCMI clock supports OEM extended configurations. CC: Michael Turquette CC: Stephen Boyd CC: linux-clk@vger.kernel.org Signed-off-by: Cristian Marussi --- drivers/clk/clk-scmi.c | 49 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c index 87e968b6c095..86ef7c553ddd 100644 --- a/drivers/clk/clk-scmi.c +++ b/drivers/clk/clk-scmi.c @@ -21,6 +21,7 @@ enum scmi_clk_feats { SCMI_CLK_STATE_CTRL_FORBIDDEN, SCMI_CLK_RATE_CTRL_FORBIDDEN, SCMI_CLK_PARENT_CTRL_FORBIDDEN, + SCMI_CLK_DUTY_CYCLE_SUPPORTED, SCMI_CLK_MAX_FEATS }; @@ -169,6 +170,45 @@ static int scmi_clk_atomic_is_enabled(struct clk_hw *hw) return !!enabled; } +static int scmi_clk_get_duty_cycle(struct clk_hw *hw, struct clk_duty *duty) +{ + int ret; + u32 val; + struct scmi_clk *clk = to_scmi_clk(hw); + + ret = scmi_proto_clk_ops->config_oem_get(clk->ph, clk->id, + SCMI_CLOCK_CFG_DUTY_CYCLE, + &val, NULL, false); + if (!ret) { + duty->num = val; + duty->den = 100; + } else { + dev_warn(clk->dev, + "Failed to get duty cycle for clock ID %d\n", clk->id); + } + + return ret; +} + +static int scmi_clk_set_duty_cycle(struct clk_hw *hw, struct clk_duty *duty) +{ + int ret; + u32 val; + struct scmi_clk *clk = to_scmi_clk(hw); + + /* SCMI OEM Duty Cycle is expressed as a percentage */ + val = (duty->num * 100) / duty->den; + ret = scmi_proto_clk_ops->config_oem_set(clk->ph, clk->id, + SCMI_CLOCK_CFG_DUTY_CYCLE, + val, false); + if (ret) + dev_warn(clk->dev, + "Failed to set duty cycle(%u/%u) for clock ID %d\n", + duty->num, duty->den, clk->id); + + return ret; +} + static int scmi_clk_ops_init(struct device *dev, struct scmi_clk *sclk, const struct clk_ops *scmi_ops) { @@ -258,6 +298,12 @@ scmi_clk_ops_alloc(struct device *dev, unsigned long feats_key) if (!(feats_key & BIT(SCMI_CLK_PARENT_CTRL_FORBIDDEN))) ops->set_parent = scmi_clk_set_parent; + /* Duty cycle */ + if (feats_key & BIT(SCMI_CLK_DUTY_CYCLE_SUPPORTED)) { + ops->get_duty_cycle = scmi_clk_get_duty_cycle; + ops->set_duty_cycle = scmi_clk_set_duty_cycle; + } + return ops; } @@ -306,6 +352,9 @@ scmi_clk_ops_select(struct scmi_clk *sclk, bool atomic_capable, if (ci->parent_ctrl_forbidden) feats_key |= BIT(SCMI_CLK_PARENT_CTRL_FORBIDDEN); + if (ci->extended_config) + feats_key |= BIT(SCMI_CLK_DUTY_CYCLE_SUPPORTED); + /* Lookup previously allocated ops */ ops = clk_ops_db[feats_key]; if (!ops) {