I need to change the CSI mclk output to 48MHz (reference clock required by imager).
I have tried changing the device tree and driver code:
mclk = <48000000>; mclk_source = <0>; // must be 0 for imx6ul
ret = of_property_read_u32(dev->of_node, "mclk", &xxx_data.mclk);
if (ret) {
dev_err(dev, "mclk frequency is invalid\n");
return ret;
}
ret = of_property_read_u32(dev->of_node, "mclk_source", (u32 *) &(xxx_data.mclk_source));
if (ret) {
dev_err(dev, "mclk_source invalid\n");
return ret;
}
ret = clk_set_rate(xxx_data.sensor_clk, xxx_data.mclk);
if (ret < 0) {
dev_err(dev, "set rate failed, rate=%d\n", xxx_data.mclk);
return ret;
}
dev_info(dev, "mclk: %lu\n", clk_get_rate(xxx.sensor_clk)); <<<<<<< always prints 24000000
I have tried changing this in clk-imx6ul.c
clk_set_rate(clks[IMX6UL_CLK_CSI], 24000000); to clk_set_rate(clks[IMX6UL_CLK_CSI], 48000000);
But I still get 24000000.
If I comment out the line above, I get 12000000.
How do I get an output of 48000000 on MX6UL_PAD_CSI_MCLK__CSI_MCLK ?
Thanks in advance.
