2 * R-Car Gen1 RESET/WDT, R-Car Gen2, Gen3, and RZ/G RST Driver
4 * Copyright (C) 2016 Glider bvba
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
11 #include <linux/err.h>
13 #include <linux/of_address.h>
14 #include <linux/soc/renesas/rcar-rst.h>
17 unsigned int modemr; /* Mode Monitoring Register Offset */
20 static const struct rst_config rcar_rst_gen1 __initconst = {
24 static const struct rst_config rcar_rst_gen2 __initconst = {
28 static const struct of_device_id rcar_rst_matches[] __initconst = {
29 /* RZ/G is handled like R-Car Gen2 */
30 { .compatible = "renesas,r8a7743-rst", .data = &rcar_rst_gen2 },
31 { .compatible = "renesas,r8a7745-rst", .data = &rcar_rst_gen2 },
33 { .compatible = "renesas,r8a7778-reset-wdt", .data = &rcar_rst_gen1 },
34 { .compatible = "renesas,r8a7779-reset-wdt", .data = &rcar_rst_gen1 },
36 { .compatible = "renesas,r8a7790-rst", .data = &rcar_rst_gen2 },
37 { .compatible = "renesas,r8a7791-rst", .data = &rcar_rst_gen2 },
38 { .compatible = "renesas,r8a7792-rst", .data = &rcar_rst_gen2 },
39 { .compatible = "renesas,r8a7793-rst", .data = &rcar_rst_gen2 },
40 { .compatible = "renesas,r8a7794-rst", .data = &rcar_rst_gen2 },
41 /* R-Car Gen3 is handled like R-Car Gen2 */
42 { .compatible = "renesas,r8a7795-rst", .data = &rcar_rst_gen2 },
43 { .compatible = "renesas,r8a7796-rst", .data = &rcar_rst_gen2 },
44 { .compatible = "renesas,r8a77995-rst", .data = &rcar_rst_gen2 },
48 static void __iomem *rcar_rst_base __initdata;
49 static u32 saved_mode __initdata;
51 static int __init rcar_rst_init(void)
53 const struct of_device_id *match;
54 const struct rst_config *cfg;
55 struct device_node *np;
59 np = of_find_matching_node_and_match(NULL, rcar_rst_matches, &match);
63 base = of_iomap(np, 0);
65 pr_warn("%pOF: Cannot map regs\n", np);
72 saved_mode = ioread32(base + cfg->modemr);
74 pr_debug("%pOF: MODE = 0x%08x\n", np, saved_mode);
81 int __init rcar_rst_read_mode_pins(u32 *mode)
86 error = rcar_rst_init();