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> >>=20 > >> diff --git a/drivers/clk/tegra/clk-tegra30.c > >> b/drivers/clk/tegra/clk-tegra30.c index 82a8cb9545eb..70e85e2949e0 100= 644 > >> --- a/drivers/clk/tegra/clk-tegra30.c > >> +++ b/drivers/clk/tegra/clk-tegra30.c > >> @@ -1237,6 +1237,7 @@ static struct tegra_clk_init_table init_table[] = =3D { > >>=20 > >> { TEGRA30_CLK_HDA, TEGRA30_CLK_PLL_P, 102000000, 0 }, > >> { TEGRA30_CLK_HDA2CODEC_2X, TEGRA30_CLK_PLL_P, 48000000, 0 }, > >> { TEGRA30_CLK_PWM, TEGRA30_CLK_PLL_P, 48000000, 0 }, > >>=20 > >> + { TEGRA30_CLK_CSUS, TEGRA30_CLK_CLK_MAX, 6000000, 1 }, > >>=20 > >> /* must be the last entry */ > >> { TEGRA30_CLK_CLK_MAX, TEGRA30_CLK_CLK_MAX, 0, 0 }, > >> =20 > >> }; > > > >I looked into what this clock does and it seems to be a gate for the CSU= S > >pin, which provides an output clock for camera sensors (VI MCLK). Defaul= t > >source seems to be PLLC_OUT1. It would be good to note that on the commi= t > >message, as I can't find any documentation about the CSUS clock elsewher= e. > > > >What is the 6MHz rate based on? >=20 > 6mhz is the statistic value which I was not able to alter while testing. = I > have tried 12mhz and 24mhz too but it remained 6mhz, so I left it 6mhz. > >Since this seems to be a clock consumed by the sensor, it seems to me th= at > >rather than making it always on, we could point to it in the sensor's > >device tree entry. >=20 > Sensor device tree uses vi_sensor as clocks source and sensor drivers don= 't > support multiple linked clocks. AIUI vi_sensor is an internal clock so the sensor cannot be receiving it=20 directly. Perhaps the sensor is actually connected to csus, and the reason = we=20 need to enable it is to allow the vi_sensor clock to pass through the csus= =20 gate? That leaves the question of why the csus pad would be muxed to vi_sensor by= =20 default, but perhaps there's an explanation for that. > >Cheers, > >Mikko