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Fri, 18 Jan 2019 08:32:16 -0800 (PST) From: Jagan Teki To: Yong Deng , Mauro Carvalho Chehab , Maxime Ripard , Rob Herring , Mark Rutland , Chen-Yu Tsai , linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi , linux-amarula@amarulasolutions.com, Michael Trimarchi Subject: [PATCH v6 2/6] media: sun6i: Add mod_rate quirk Date: Fri, 18 Jan 2019 22:01:54 +0530 Message-Id: <20190118163158.21418-3-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 In-Reply-To: <20190118163158.21418-1-jagan@amarulasolutions.com> References: <20190118163158.21418-1-jagan@amarulasolutions.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190118_083218_583283_522CB7F0 X-CRM114-Status: GOOD ( 14.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jagan Teki Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Unfortunately default CSI_SCLK rate cannot work properly to drive the connected sensor interface, particularly on few Allwinner SoC's like A64. So, add mod_rate quirk via driver data so-that the respective SoC's which require to alter the default mod clock rate can assign the operating clock rate. Signed-off-by: Jagan Teki --- .../platform/sunxi/sun6i-csi/sun6i_csi.c | 26 ++++++++++++++++--- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c index ee882b66a5ea..a9aef630c3b4 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -28,8 +29,13 @@ #define MODULE_NAME "sun6i-csi" +struct sun6i_csi_variant { + unsigned long mod_rate; +}; + struct sun6i_csi_dev { struct sun6i_csi csi; + const struct sun6i_csi_variant *variant; struct device *dev; struct regmap *regmap; @@ -161,15 +167,20 @@ int sun6i_csi_set_power(struct sun6i_csi *csi, bool enable) regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0); clk_disable_unprepare(sdev->clk_ram); + if (sdev->variant->mod_rate) + clk_rate_exclusive_put(sdev->clk_mod); clk_disable_unprepare(sdev->clk_mod); reset_control_assert(sdev->rstc_bus); return 0; } + if (sdev->variant->mod_rate) + clk_set_rate_exclusive(sdev->clk_mod, sdev->variant->mod_rate); + ret = clk_prepare_enable(sdev->clk_mod); if (ret) { dev_err(sdev->dev, "Enable csi clk err %d\n", ret); - return ret; + goto clk_mod_put; } ret = clk_prepare_enable(sdev->clk_ram); @@ -192,6 +203,9 @@ int sun6i_csi_set_power(struct sun6i_csi *csi, bool enable) clk_disable_unprepare(sdev->clk_ram); clk_mod_disable: clk_disable_unprepare(sdev->clk_mod); +clk_mod_put: + if (sdev->variant->mod_rate) + clk_rate_exclusive_put(sdev->clk_mod); return ret; } @@ -871,6 +885,7 @@ static int sun6i_csi_probe(struct platform_device *pdev) sdev->dev = &pdev->dev; /* The DMA bus has the memory mapped at 0 */ sdev->dev->dma_pfn_offset = PHYS_OFFSET >> PAGE_SHIFT; + sdev->variant = of_device_get_match_data(sdev->dev); ret = sun6i_csi_resource_request(sdev, pdev); if (ret) @@ -891,10 +906,13 @@ static int sun6i_csi_remove(struct platform_device *pdev) return 0; } +static const struct sun6i_csi_variant sun6i_a31_csi = { +}; + static const struct of_device_id sun6i_csi_of_match[] = { - { .compatible = "allwinner,sun6i-a31-csi", }, - { .compatible = "allwinner,sun8i-h3-csi", }, - { .compatible = "allwinner,sun8i-v3s-csi", }, + { .compatible = "allwinner,sun6i-a31-csi", .data = &sun6i_a31_csi, }, + { .compatible = "allwinner,sun8i-h3-csi", .data = &sun6i_a31_csi, }, + { .compatible = "allwinner,sun8i-v3s-csi", .data = &sun6i_a31_csi, }, {}, }; MODULE_DEVICE_TABLE(of, sun6i_csi_of_match); -- 2.18.0.321.gffc6fa0e3 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel