1 // SPDX-License-Identifier: BSD-3-Clause
3 * Copyright (c) 2020, MIPI Alliance, Inc.
5 * Author: Nicolas Pitre <npitre@baylibre.com>
8 #include <linux/device.h>
9 #include <linux/bitfield.h>
10 #include <linux/i3c/master.h>
17 * Device Characteristic Table
20 void i3c_hci_dct_get_val(struct i3c_hci *hci, unsigned int dct_idx,
21 u64 *pid, unsigned int *dcr, unsigned int *bcr)
23 void __iomem *reg = hci->DCT_regs + dct_idx * 4 * 4;
24 u32 dct_entry_data[4];
27 for (i = 0; i < 4; i++) {
28 dct_entry_data[i] = readl(reg);
32 *pid = ((u64)dct_entry_data[0]) << (47 - 32 + 1) |
33 FIELD_GET(W1_MASK(47, 32), dct_entry_data[1]);
34 *dcr = FIELD_GET(W2_MASK(71, 64), dct_entry_data[2]);
35 *bcr = FIELD_GET(W2_MASK(79, 72), dct_entry_data[2]);