| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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); |