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84  * LCD contrast in 680 is controlled by pins 6..3 of HD64461 GPIO
89  * The contrast value is programmed by setting bits in the data
106  * LCD contrast in 620lx is controlled by pins 7,6,3,4,5 of HD64461
111  * The contrast value is programmed by setting bits in the data
200 	 * Contrast and power are controlled by HD64461 GPIO port B.
214 	 * 620LX and 680 have different contrast control.
249 	aprint_normal(": brightness %d, contrast %d\n",
264 	/* LCD contrast hooks */
288  * Get raw contrast value programmed in GPIO port B control register.
289  * Used only at attach time to get initial contrast.
294 	int contrast;
297 	contrast = 0;
303 			contrast |= (1 << bit);
306 	return contrast;
311  * Set contrast by programming GPIO port B control register.
315 j6x0lcd_contrast_set(struct j6x0lcd_softc *sc, int contrast)
319 	sc->sc_contrast = contrast;
324 	bcr |= sc->sc_contrast_control_bits[contrast];