1 // SPDX-License-Identifier: GPL-2.0+ 2 #include <linux/device.h> 3 #include <linux/regmap.h> 4 #include <linux/mfd/syscon.h> 5 #include <linux/bitops.h> 6 #include <linux/module.h> 7 #include "pl111_nomadik.h" 8 9 #define PMU_CTRL_OFFSET 0x0000 10 #define PMU_CTRL_LCDNDIF BIT(26) 11 12 void pl111_nomadik_init(struct device *dev) 13 { 14 struct regmap *pmu_regmap; 15 16 /* 17 * Just bail out of this is not found, we could be running 18 * multiplatform on something else than Nomadik. 19 */ 20 pmu_regmap = 21 syscon_regmap_lookup_by_compatible("stericsson,nomadik-pmu"); 22 if (IS_ERR(pmu_regmap)) 23 return; 24 25 /* 26 * This bit in the PMU controller multiplexes the two graphics 27 * blocks found in the Nomadik STn8815. The other one is called 28 * MDIF (Master Display Interface) and gets muxed out here. 29 */ 30 regmap_update_bits(pmu_regmap, 31 PMU_CTRL_OFFSET, 32 PMU_CTRL_LCDNDIF, 33 0); 34 dev_info(dev, "set Nomadik PMU mux to CLCD mode\n"); 35 } 36 EXPORT_SYMBOL_GPL(pl111_nomadik_init); 37