From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shawn Guo Subject: Re: [PATCH v2 04/15] clk: imx7d: reset parent for mipi csi root Date: Thu, 3 May 2018 10:27:16 +0800 Message-ID: <20180503022714.GO3443@dragon> References: <20180423134750.30403-1-rui.silva@linaro.org> <20180423134750.30403-5-rui.silva@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20180423134750.30403-5-rui.silva@linaro.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" To: Rui Miguel Silva Cc: devel@driverdev.osuosl.org, devicetree@vger.kernel.org, sakari.ailus@linux.intel.com, Greg Kroah-Hartman , Ryan Harkin , Rob Herring , Philipp Zabel , Steve Longerbeam , Fabio Estevam , mchehab@kernel.org, linux-clk@vger.kernel.org, linux-media@vger.kernel.org List-Id: devicetree@vger.kernel.org On Mon, Apr 23, 2018 at 02:47:39PM +0100, Rui Miguel Silva wrote: > To guarantee that we do not get Overflow in image FIFO the outer bandwidth has > to be faster than inputer bandwidth. For that it must be possible to set a > faster frequency clock. So set new parent to sys_pfd3 clock for the mipi csi > block. > > Cc: linux-clk@vger.kernel.org > Signed-off-by: Rui Miguel Silva > --- > drivers/clk/imx/clk-imx7d.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/clk/imx/clk-imx7d.c b/drivers/clk/imx/clk-imx7d.c > index f7f4db2e6fa6..9a1a18ceb132 100644 > --- a/drivers/clk/imx/clk-imx7d.c > +++ b/drivers/clk/imx/clk-imx7d.c > @@ -891,6 +891,9 @@ static void __init imx7d_clocks_init(struct device_node *ccm_node) > clk_set_parent(clks[IMX7D_PLL_AUDIO_MAIN_BYPASS], clks[IMX7D_PLL_AUDIO_MAIN]); > clk_set_parent(clks[IMX7D_PLL_VIDEO_MAIN_BYPASS], clks[IMX7D_PLL_VIDEO_MAIN]); > > + clk_set_parent(clks[IMX7D_MIPI_CSI_ROOT_SRC], > + clks[IMX7D_PLL_SYS_PFD3_CLK]); > + For i.MX clock driver, we intentionally ignore line over 80 columns warning to make the file easier for read. So I would suggest you keep it on a single line to stay consistent with other clk_set_parent() calls. Other than that, Acked-by: Shawn Guo > /* use old gpt clk setting, gpt1 root clk must be twice as gpt counter freq */ > clk_set_parent(clks[IMX7D_GPT1_ROOT_SRC], clks[IMX7D_OSC_24M_CLK]); > > -- > 2.17.0 >