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);
37