A2W_PLL_FRAC_BITS  253 drivers/clk/bcm/clk-bcm2835.c # define A2W_PLL_FRAC_BITS		20
A2W_PLL_FRAC_BITS   32 drivers/clk/bcm/clk-raspberrypi.c #define A2W_PLL_FRAC_BITS		20