From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>
Cc: Rob Herring <robh+dt@kernel.org>,
Jon Hunter <jonathanh@nvidia.com>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>, Joseph Lo <josephl@nvidia.com>,
linux-tegra@vger.kernel.org, devicetree@vger.kernel.org,
linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v6 09/14] memory: tegra: Add EMC scaling support code for Tegra210
Date: Tue, 14 Apr 2020 23:46:18 +0300 [thread overview]
Message-ID: <5616bbe7-d185-1a6a-1fc5-e4ee5d2f65e6@gmail.com> (raw)
In-Reply-To: <20200409175238.3586487-10-thierry.reding@gmail.com>
09.04.2020 20:52, Thierry Reding пишет:
...
> +static void tegra210_change_dll_src(struct tegra210_emc *emc,
> + u32 clksrc)
> +{
> + u32 dll_setting = emc->next->dll_clk_src;
> + u32 emc_clk_src;
> + u32 emc_clk_div;
> +
> + emc_clk_src = (clksrc & EMC_CLK_EMC_2X_CLK_SRC_MASK) >>
> + EMC_CLK_EMC_2X_CLK_SRC_SHIFT;
> + emc_clk_div = (clksrc & EMC_CLK_EMC_2X_CLK_DIVISOR_MASK) >>
> + EMC_CLK_EMC_2X_CLK_DIVISOR_SHIFT;
> +
> + dll_setting &= ~(DLL_CLK_EMC_DLL_CLK_SRC_MASK |
> + DLL_CLK_EMC_DLL_CLK_DIVISOR_MASK);
> + dll_setting |= emc_clk_src << DLL_CLK_EMC_DLL_CLK_SRC_SHIFT;
> + dll_setting |= emc_clk_div << DLL_CLK_EMC_DLL_CLK_DIVISOR_SHIFT;
> +
> + dll_setting &= ~DLL_CLK_EMC_DLL_DDLL_CLK_SEL_MASK;
> + if (emc_clk_src == EMC_CLK_SOURCE_PLLMB_LJ)
> + dll_setting |= (PLLM_VCOB <<
> + DLL_CLK_EMC_DLL_DDLL_CLK_SEL_SHIFT);
> + else if (emc_clk_src == EMC_CLK_SOURCE_PLLM_LJ)
> + dll_setting |= (PLLM_VCOA <<
> + DLL_CLK_EMC_DLL_DDLL_CLK_SEL_SHIFT);
> + else
> + dll_setting |= (EMC_DLL_SWITCH_OUT <<
> + DLL_CLK_EMC_DLL_DDLL_CLK_SEL_SHIFT);
> +
> + tegra210_clk_emc_dll_update_setting(dll_setting);
> +
> + if (emc->next->clk_out_enb_x_0_clk_enb_emc_dll)
> + tegra210_clk_emc_dll_enable(true);
> + else
> + tegra210_clk_emc_dll_enable(false);
Isn't something like fence_udelay(1) needed after touching clk registers?
next prev parent reply other threads:[~2020-04-14 20:46 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-09 17:52 [PATCH v6 00/14] Add EMC scaling support for Tegra210 Thierry Reding
2020-04-09 17:52 ` [PATCH v6 01/14] dt-bindings: reserved-memory: Introduce memory-region-names Thierry Reding
2020-04-15 16:23 ` Rob Herring
2020-04-09 17:52 ` [PATCH v6 02/14] of: reserved-memory: Support lookup of regions by name Thierry Reding
2020-04-15 16:24 ` Rob Herring
2020-04-15 23:35 ` Thierry Reding
2020-04-16 0:58 ` Rob Herring
2020-04-09 17:52 ` [PATCH v6 03/14] of: reserved-memory: Support multiple regions per device Thierry Reding
2020-04-15 16:25 ` Rob Herring
2020-04-09 17:52 ` [PATCH v6 04/14] clk: tegra: Rename Tegra124 EMC clock source file Thierry Reding
2020-04-14 16:48 ` Dmitry Osipenko
2020-04-14 17:14 ` Thierry Reding
2020-04-09 17:52 ` [PATCH v6 05/14] clk: tegra: Add PLLP_UD and PLLMB_UD for Tegra210 Thierry Reding
2020-04-09 17:52 ` [PATCH v6 06/14] clk: tegra: Export functions for EMC clock scaling Thierry Reding
2020-04-09 17:52 ` [PATCH v6 07/14] clk: tegra: Implement Tegra210 EMC clock Thierry Reding
2020-04-09 18:24 ` Dmitry Osipenko
2020-04-14 14:34 ` Thierry Reding
2020-04-14 15:18 ` Dmitry Osipenko
2020-04-14 17:10 ` Thierry Reding
2020-04-14 20:22 ` Dmitry Osipenko
2020-04-10 20:49 ` Dmitry Osipenko
2020-04-14 14:36 ` Thierry Reding
2020-04-09 17:52 ` [PATCH v6 08/14] dt-bindings: memory: tegra: Add external memory controller binding for Tegra210 Thierry Reding
2020-04-15 16:27 ` Rob Herring
2020-04-09 17:52 ` [PATCH v6 09/14] memory: tegra: Add EMC scaling support code " Thierry Reding
2020-04-09 19:00 ` Dmitry Osipenko
2020-04-14 14:45 ` Thierry Reding
2020-04-09 19:16 ` Dmitry Osipenko
2020-04-14 14:54 ` Thierry Reding
2020-04-14 20:50 ` Dmitry Osipenko
2020-04-09 23:56 ` Dmitry Osipenko
2020-04-11 20:39 ` Dmitry Osipenko
2020-04-14 15:05 ` Thierry Reding
2020-04-14 15:32 ` Dmitry Osipenko
2020-04-14 15:02 ` Thierry Reding
2020-04-10 14:25 ` Dmitry Osipenko
2020-04-14 15:08 ` Thierry Reding
2020-04-10 14:26 ` Dmitry Osipenko
2020-04-14 15:39 ` Thierry Reding
2020-04-10 20:46 ` Dmitry Osipenko
2020-04-14 15:41 ` Thierry Reding
2020-04-14 20:39 ` Dmitry Osipenko
2020-04-14 20:46 ` Dmitry Osipenko [this message]
2020-04-14 20:56 ` Dmitry Osipenko
2020-04-09 17:52 ` [PATCH v6 10/14] memory: tegra: Add EMC scaling sequence " Thierry Reding
2020-04-10 14:18 ` Dmitry Osipenko
2020-04-14 15:45 ` Thierry Reding
2020-04-14 16:27 ` Dmitry Osipenko
2020-04-14 20:03 ` Thierry Reding
2020-04-09 17:52 ` [PATCH v6 11/14] memory: tegra: Support derated timings on Tegra210 Thierry Reding
2020-04-09 23:44 ` Dmitry Osipenko
2020-04-14 15:47 ` Thierry Reding
2020-04-14 16:25 ` Dmitry Osipenko
2020-04-10 14:28 ` Dmitry Osipenko
2020-04-14 16:29 ` Thierry Reding
2020-04-14 16:40 ` Dmitry Osipenko
2020-04-14 16:48 ` Thierry Reding
2020-04-09 17:52 ` [PATCH v6 12/14] arm64: tegra: Add external memory controller node for Tegra210 Thierry Reding
2020-04-09 17:52 ` [PATCH v6 13/14] arm64: tegra: Hook up EMC cooling device Thierry Reding
2020-04-09 17:52 ` [PATCH v6 14/14] clk: tegra: Remove the old emc_mux clock for Tegra210 Thierry Reding
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