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[46.138.85.91]) by smtp.gmail.com with ESMTPSA id g30sm46607lfj.298.2021.08.16.18.30.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Aug 2021 18:30:27 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Ulf Hansson , Viresh Kumar , Stephen Boyd , Peter De Schrijver , Mikko Perttunen , Peter Chen , Mark Brown , Lee Jones , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Nishanth Menon , Vignesh Raghavendra , Richard Weinberger , Miquel Raynal , Lucas Stach , Stefan Agner , Adrian Hunter , Mauro Carvalho Chehab , Rob Herring , Michael Turquette Cc: linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, linux-staging@lists.linux.dev, linux-spi@vger.kernel.org, linux-pwm@vger.kernel.org, linux-mtd@lists.infradead.org, linux-mmc@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-clk@vger.kernel.org Subject: [PATCH v8 22/34] spi: tegra20-slink: Add OPP support Date: Tue, 17 Aug 2021 04:27:42 +0300 Message-Id: <20210817012754.8710-23-digetx@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210817012754.8710-1-digetx@gmail.com> References: <20210817012754.8710-1-digetx@gmail.com> Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The SPI on Tegra belongs to the core power domain and we're going to enable GENPD support for the core domain. Now SPI driver must use OPP API for driving the controller's clock rate because OPP API takes care of reconfiguring the domain's performance state in accordance to the rate. Add OPP support to the driver. Signed-off-by: Dmitry Osipenko --- drivers/spi/spi-tegra20-slink.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c index deff16ba6d58..37cb15dc59f7 100644 --- a/drivers/spi/spi-tegra20-slink.c +++ b/drivers/spi/spi-tegra20-slink.c @@ -18,12 +18,15 @@ #include #include #include +#include #include #include #include #include #include +#include + #define SLINK_COMMAND 0x000 #define SLINK_BIT_LENGTH(x) (((x) & 0x1f) << 0) #define SLINK_WORD_SIZE(x) (((x) & 0x1f) << 5) @@ -683,7 +686,7 @@ static int tegra_slink_start_transfer_one(struct spi_device *spi, bits_per_word = t->bits_per_word; speed = t->speed_hz; if (speed != tspi->cur_speed) { - clk_set_rate(tspi->clk, speed * 4); + dev_pm_opp_set_rate(tspi->dev, speed * 4); tspi->cur_speed = speed; } @@ -1054,6 +1057,10 @@ static int tegra_slink_probe(struct platform_device *pdev) goto exit_free_master; } + ret = devm_tegra_core_dev_init_opp_table_simple(&pdev->dev); + if (ret) + return ret; + /* disabled clock may cause interrupt storm upon request */ tspi->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(tspi->clk)) { @@ -1205,6 +1212,12 @@ static int tegra_slink_runtime_resume(struct device *dev) struct tegra_slink_data *tspi = spi_master_get_devdata(master); int ret; + ret = dev_pm_opp_sync(dev); + if (ret) { + dev_err(dev, "failed to sync OPP: %d\n", ret); + return ret; + } + ret = clk_prepare_enable(tspi->clk); if (ret < 0) { dev_err(tspi->dev, "clk_prepare failed: %d\n", ret); -- 2.32.0