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[93.42.71.246]) by smtp.googlemail.com with ESMTPSA id n13-20020a170906724d00b006cedd6d7e24sm5856697ejk.119.2022.03.13.12.05.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Mar 2022 12:05:13 -0700 (PDT) From: Ansuel Smith To: Rob Herring , Bjorn Andersson , Andy Gross , Michael Turquette , Stephen Boyd , Peter De Schrijver , Prashant Gaikwad , Thierry Reding , Jonathan Hunter , Ansuel Smith , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH 11/16] clk: qcom: krait-cc: force sec_mux to QSB Date: Sun, 13 Mar 2022 20:04:14 +0100 Message-Id: <20220313190419.2207-12-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220313190419.2207-1-ansuelsmth@gmail.com> References: <20220313190419.2207-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Now that we have converted every driver to parent_data, it was notice that the bootloader can't really leave the system in a strange state where l2 or the cpu0/1 can be sourced in a number of ways for example cpu1 sourcing out of qsb, l2 sourcing out of pxo. To correctly reset the mux and the HFPLL force the sec_mux to QSB. Signed-off-by: Ansuel Smith --- drivers/clk/qcom/krait-cc.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/clk/qcom/krait-cc.c b/drivers/clk/qcom/krait-cc.c index 6530f10a546f..1bdc89c097e6 100644 --- a/drivers/clk/qcom/krait-cc.c +++ b/drivers/clk/qcom/krait-cc.c @@ -15,6 +15,8 @@ #include "clk-krait.h" +#define QSB_RATE 1 + static unsigned int sec_mux_map[] = { 2, 0, @@ -178,6 +180,12 @@ krait_add_sec_mux(struct device *dev, struct clk *qsb, int id, if (ret) clk = ERR_PTR(ret); + /* Force the sec_mux to be set to QSB rate. + * This is needed to correctly set the parents and + * to later reset mux and HFPLL to a known freq. + */ + clk_set_rate(clk, QSB_RATE); + err_clk: if (unique_aux) kfree(parent_name); @@ -374,7 +382,7 @@ static int krait_cc_probe(struct platform_device *pdev) */ cur_rate = clk_get_rate(l2_pri_mux_clk); aux_rate = 384000000; - if (cur_rate == 1) { + if (cur_rate == QSB_RATE) { dev_info(dev, "L2 @ QSB rate. Forcing new rate.\n"); cur_rate = aux_rate; } @@ -385,7 +393,7 @@ static int krait_cc_probe(struct platform_device *pdev) for_each_possible_cpu(cpu) { clk = clks[cpu]; cur_rate = clk_get_rate(clk); - if (cur_rate == 1) { + if (cur_rate == QSB_RATE) { dev_info(dev, "CPU%d @ QSB rate. Forcing new rate.\n", cpu); cur_rate = aux_rate; } -- 2.34.1