mailbox: tegra: add support for Tegra264

Tegra264 has a slightly different doorbell register layout than
previous chips.

Acked-by: Thierry Reding <[e-mail]>
Signed-off-by: Stefan Kristiansson <[e-mail]>
Signed-off-by: Peter De Schrijver <[e-mail]>
Signed-off-by: Jassi Brar <[e-mail]>

drivers/mailbox/tegra-hsp.c

···
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2016-2018, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2016-2023, NVIDIA CORPORATION.  All rights reserved.
  */
 
 #include <linux/delay.h>
···
 	const struct tegra_hsp_db_map *map;
 	bool has_per_mb_ie;
 	bool has_128_bit_mb;
+	unsigned int reg_stride;
 };
 
 struct tegra_hsp {
···
 		return ERR_PTR(-ENOMEM);
 
 	offset = (1 + (hsp->num_sm / 2) + hsp->num_ss + hsp->num_as) * SZ_64K;
-	offset += index * 0x100;
+	offset += index * hsp->soc->reg_stride;
 
 	db->channel.regs = hsp->regs + offset;
 	db->channel.hsp = hsp;
···
 	.map = tegra186_hsp_db_map,
 	.has_per_mb_ie = false,
 	.has_128_bit_mb = false,
+	.reg_stride = 0x100,
 };
 
 static const struct tegra_hsp_soc tegra194_hsp_soc = {
 	.map = tegra186_hsp_db_map,
 	.has_per_mb_ie = true,
 	.has_128_bit_mb = false,
+	.reg_stride = 0x100,
 };
 
 static const struct tegra_hsp_soc tegra234_hsp_soc = {
 	.map = tegra186_hsp_db_map,
 	.has_per_mb_ie = false,
 	.has_128_bit_mb = true,
+	.reg_stride = 0x100,
+};
+
+static const struct tegra_hsp_soc tegra264_hsp_soc = {
+	.map = tegra186_hsp_db_map,
+	.has_per_mb_ie = false,
+	.has_128_bit_mb = true,
+	.reg_stride = 0x1000,
 };
 
 static const struct of_device_id tegra_hsp_match[] = {
 	{ .compatible = "nvidia,tegra186-hsp", .data = &tegra186_hsp_soc },
 	{ .compatible = "nvidia,tegra194-hsp", .data = &tegra194_hsp_soc },
 	{ .compatible = "nvidia,tegra234-hsp", .data = &tegra234_hsp_soc },
+	{ .compatible = "nvidia,tegra264-hsp", .data = &tegra264_hsp_soc },
 	{ }
 };