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Fri, 22 Mar 2024 08:58:19 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Luc Michel , Luc Michel , Damien Hedde , =?UTF-8?q?In=C3=A8s=20Varhol?= , Arnaud Minier , qemu-arm@nongnu.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH-for-9.0 1/2] hw/clock: Let clock_set_mul_div() return boolean value Date: Fri, 22 Mar 2024 16:58:09 +0100 Message-ID: <20240322155810.5733-2-philmd@linaro.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240322155810.5733-1-philmd@linaro.org> References: <20240322155810.5733-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::334; envelope-from=philmd@linaro.org; helo=mail-wm1-x334.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1711123148460100004 Let clock_set_mul_div() return a boolean value whether the clock has been updated or not, similarly to clock_set(). Signed-off-by: Philippe Mathieu-Daud=C3=A9 Acked-by: Luc Michel --- include/hw/clock.h | 4 +++- hw/core/clock.c | 8 +++++++- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/include/hw/clock.h b/include/hw/clock.h index bb12117f67..eb58599131 100644 --- a/include/hw/clock.h +++ b/include/hw/clock.h @@ -357,6 +357,8 @@ char *clock_display_freq(Clock *clk); * @multiplier: multiplier value * @divider: divider value * + * @return: true if the clock is changed. + * * By default, a Clock's children will all run with the same period * as their parent. This function allows you to adjust the multiplier * and divider used to derive the child clock frequency. @@ -374,6 +376,6 @@ char *clock_display_freq(Clock *clk); * Note that this function does not call clock_propagate(); the * caller should do that if necessary. */ -void clock_set_mul_div(Clock *clk, uint32_t multiplier, uint32_t divider); +bool clock_set_mul_div(Clock *clk, uint32_t multiplier, uint32_t divider); =20 #endif /* QEMU_HW_CLOCK_H */ diff --git a/hw/core/clock.c b/hw/core/clock.c index d82e44cd1a..a19c7db7df 100644 --- a/hw/core/clock.c +++ b/hw/core/clock.c @@ -143,14 +143,20 @@ char *clock_display_freq(Clock *clk) return freq_to_str(clock_get_hz(clk)); } =20 -void clock_set_mul_div(Clock *clk, uint32_t multiplier, uint32_t divider) +bool clock_set_mul_div(Clock *clk, uint32_t multiplier, uint32_t divider) { assert(divider !=3D 0); =20 + if (clk->multiplier =3D=3D multiplier && clk->divider =3D=3D divider) { + return false; + } + trace_clock_set_mul_div(CLOCK_PATH(clk), clk->multiplier, multiplier, clk->divider, divider); clk->multiplier =3D multiplier; clk->divider =3D divider; + + return true; } =20 static void clock_initfn(Object *obj) --=20 2.41.0 From nobody Sun May 12 05:11:42 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1711123170; cv=none; d=zohomail.com; s=zohoarc; b=P5cvTVwu6E/Ysu/AMTOf8wdhFXsiTJA/+i5ZkSDyVag+kQAhM5mPWhmKRfPIik0xDPYab7G3VmixCkPBepJ6BeoPwC2eISjcWQMdG4e9m3HtJDJDPYavw2SHOTpZSUb5KmUgQvCT7E/IPEXvYMNf/cFWde2pzYXtiXsEwWT0SSs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1711123170; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; 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Fri, 22 Mar 2024 08:58:26 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Luc Michel , Luc Michel , Damien Hedde , =?UTF-8?q?In=C3=A8s=20Varhol?= , Arnaud Minier , qemu-arm@nongnu.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH-for-9.0 2/2] hw/misc/stm32l4x5_rcc: Propagate period when enabling a clock Date: Fri, 22 Mar 2024 16:58:10 +0100 Message-ID: <20240322155810.5733-3-philmd@linaro.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240322155810.5733-1-philmd@linaro.org> References: <20240322155810.5733-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::22a; envelope-from=philmd@linaro.org; helo=mail-lj1-x22a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1711123172264100003 From: Arnaud Minier The "clock_set_mul_div" function doesn't propagate the clock period to the children if it is changed (e.g. by enabling/disabling a clock multiplexer). This was overlooked during the implementation due to late changes. This commit propagates the change if the multiplier or divider changes. Fixes: ec7d83acbd ("hw/misc/stm32l4x5_rcc: Add an internal clock multiplexe= r object") Signed-off-by: Arnaud Minier Signed-off-by: In=C3=A8s Varhol Message-ID: <20240317103918.44375-2-arnaud.minier@telecom-paris.fr> [PMD: Check clock_set_mul_div() return value] Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- hw/misc/stm32l4x5_rcc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/misc/stm32l4x5_rcc.c b/hw/misc/stm32l4x5_rcc.c index bc2d63528b..7ad628b296 100644 --- a/hw/misc/stm32l4x5_rcc.c +++ b/hw/misc/stm32l4x5_rcc.c @@ -59,7 +59,10 @@ static void clock_mux_update(RccClockMuxState *mux, bool= bypass_source) freq_multiplier =3D mux->divider; } =20 - clock_set_mul_div(mux->out, freq_multiplier, mux->multiplier); + if (clock_set_mul_div(mux->out, freq_multiplier, mux->multiplier)) { + clock_propagate(mux->out); + } + clock_update(mux->out, clock_get(current_source)); =20 src_freq =3D clock_get_hz(current_source); --=20 2.41.0