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 
pl111_nomadik_init(struct device * dev)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