Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 <drm/drm_print.h>
8#include "pl111_nomadik.h"
9
10#define PMU_CTRL_OFFSET 0x0000
11#define PMU_CTRL_LCDNDIF BIT(26)
12
13void pl111_nomadik_init(struct drm_device *dev)
14{
15 struct regmap *pmu_regmap;
16
17 /*
18 * Just bail out of this is not found, we could be running
19 * multiplatform on something else than Nomadik.
20 */
21 pmu_regmap =
22 syscon_regmap_lookup_by_compatible("stericsson,nomadik-pmu");
23 if (IS_ERR(pmu_regmap))
24 return;
25
26 /*
27 * This bit in the PMU controller multiplexes the two graphics
28 * blocks found in the Nomadik STn8815. The other one is called
29 * MDIF (Master Display Interface) and gets muxed out here.
30 */
31 regmap_update_bits(pmu_regmap,
32 PMU_CTRL_OFFSET,
33 PMU_CTRL_LCDNDIF,
34 0);
35 drm_info(dev, "set Nomadik PMU mux to CLCD mode\n");
36}
37EXPORT_SYMBOL_GPL(pl111_nomadik_init);