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[91.79.162.197]) by smtp.gmail.com with ESMTPSA id q4sm2008377lje.99.2019.06.16.16.36.07 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 16 Jun 2019 16:36:07 -0700 (PDT) From: Dmitry Osipenko To: Rob Herring , Michael Turquette , Joseph Lo , Thierry Reding , Jonathan Hunter , Peter De Schrijver , Prashant Gaikwad , Stephen Boyd Cc: devicetree@vger.kernel.org, linux-clk@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 03/10] memory: tegra20-emc: Adapt for clock driver changes Date: Mon, 17 Jun 2019 02:35:44 +0300 Message-Id: <20190616233551.6838-4-digetx@gmail.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190616233551.6838-1-digetx@gmail.com> References: <20190616233551.6838-1-digetx@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The emc_mux clock is gone now and EMC driver should provide the clock rounding functionality. Signed-off-by: Dmitry Osipenko --- drivers/memory/tegra/tegra20-emc.c | 55 ++++++++++++++++++++++++------ 1 file changed, 45 insertions(+), 10 deletions(-) diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c index 55ac3863a354..d3e1f898d745 100644 --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -138,7 +139,6 @@ struct tegra_emc { struct completion clk_handshake_complete; struct notifier_block clk_nb; struct clk *backup_clk; - struct clk *emc_mux; struct clk *pll_m; struct clk *clk; void __iomem *regs; @@ -424,6 +424,44 @@ static int emc_setup_hw(struct tegra_emc *emc) return 0; } +static long emc_round_rate(unsigned long rate, + unsigned long min_rate, + unsigned long max_rate, + void *arg) +{ + struct emc_timing *timing = NULL; + struct tegra_emc *emc = arg; + unsigned int i; + + min_rate = min(min_rate, emc->timings[emc->num_timings - 1].rate); + + for (i = 0; i < emc->num_timings; i++) { + if (emc->timings[i].rate < rate && i != emc->num_timings - 1) + continue; + + if (emc->timings[i].rate > max_rate) { + i = max(i, 1u) - 1; + + if (emc->timings[i].rate < min_rate) + break; + } + + if (emc->timings[i].rate < min_rate) + continue; + + timing = &emc->timings[i]; + break; + } + + if (!timing) { + dev_err(emc->dev, "no timing for rate %lu min %lu max %lu\n", + rate, min_rate, max_rate); + return -EINVAL; + } + + return timing->rate; +} + static int tegra_emc_probe(struct platform_device *pdev) { struct device_node *np; @@ -480,18 +518,20 @@ static int tegra_emc_probe(struct platform_device *pdev) return err; } + tegra20_clk_set_emc_round_callback(emc_round_rate, emc); + emc->clk = devm_clk_get(&pdev->dev, "emc"); if (IS_ERR(emc->clk)) { err = PTR_ERR(emc->clk); dev_err(&pdev->dev, "failed to get emc clock: %d\n", err); - return err; + goto unset_cb; } emc->pll_m = clk_get_sys(NULL, "pll_m"); if (IS_ERR(emc->pll_m)) { err = PTR_ERR(emc->pll_m); dev_err(&pdev->dev, "failed to get pll_m clock: %d\n", err); - return err; + goto unset_cb; } emc->backup_clk = clk_get_sys(NULL, "pll_p"); @@ -501,13 +541,6 @@ static int tegra_emc_probe(struct platform_device *pdev) goto put_pll_m; } - emc->emc_mux = clk_get_parent(emc->clk); - if (IS_ERR(emc->emc_mux)) { - err = PTR_ERR(emc->emc_mux); - dev_err(&pdev->dev, "failed to get emc_mux clock: %d\n", err); - goto put_backup; - } - err = clk_notifier_register(emc->clk, &emc->clk_nb); if (err) { dev_err(&pdev->dev, "failed to register clk notifier: %d\n", @@ -521,6 +554,8 @@ static int tegra_emc_probe(struct platform_device *pdev) clk_put(emc->backup_clk); put_pll_m: clk_put(emc->pll_m); +unset_cb: + tegra20_clk_set_emc_round_callback(NULL, NULL); return err; } -- 2.22.0