pl111_nomadik.c (955B)
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 12void 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} 36EXPORT_SYMBOL_GPL(pl111_nomadik_init);