14c58063dSHeiko Stuebner /* 24c58063dSHeiko Stuebner * Rockchip Generic Register Files setup 34c58063dSHeiko Stuebner * 44c58063dSHeiko Stuebner * Copyright (c) 2016 Heiko Stuebner <heiko@sntech.de> 54c58063dSHeiko Stuebner * 64c58063dSHeiko Stuebner * This program is free software; you can redistribute it and/or modify 74c58063dSHeiko Stuebner * it under the terms of the GNU General Public License version 2 as 84c58063dSHeiko Stuebner * published by the Free Software Foundation. 94c58063dSHeiko Stuebner */ 104c58063dSHeiko Stuebner 114c58063dSHeiko Stuebner #include <linux/err.h> 124c58063dSHeiko Stuebner #include <linux/mfd/syscon.h> 134c58063dSHeiko Stuebner #include <linux/of_device.h> 144c58063dSHeiko Stuebner #include <linux/platform_device.h> 154c58063dSHeiko Stuebner #include <linux/regmap.h> 164c58063dSHeiko Stuebner 174c58063dSHeiko Stuebner #define HIWORD_UPDATE(val, mask, shift) \ 184c58063dSHeiko Stuebner ((val) << (shift) | (mask) << ((shift) + 16)) 194c58063dSHeiko Stuebner 204c58063dSHeiko Stuebner struct rockchip_grf_value { 214c58063dSHeiko Stuebner const char *desc; 224c58063dSHeiko Stuebner u32 reg; 234c58063dSHeiko Stuebner u32 val; 244c58063dSHeiko Stuebner }; 254c58063dSHeiko Stuebner 264c58063dSHeiko Stuebner struct rockchip_grf_info { 274c58063dSHeiko Stuebner const struct rockchip_grf_value *values; 284c58063dSHeiko Stuebner int num_values; 294c58063dSHeiko Stuebner }; 304c58063dSHeiko Stuebner 314c58063dSHeiko Stuebner #define RK3036_GRF_SOC_CON0 0x140 324c58063dSHeiko Stuebner 334c58063dSHeiko Stuebner static const struct rockchip_grf_value rk3036_defaults[] __initconst = { 344c58063dSHeiko Stuebner /* 354c58063dSHeiko Stuebner * Disable auto jtag/sdmmc switching that causes issues with the 364c58063dSHeiko Stuebner * clock-framework and the mmc controllers making them unreliable. 374c58063dSHeiko Stuebner */ 384c58063dSHeiko Stuebner { "jtag switching", RK3036_GRF_SOC_CON0, HIWORD_UPDATE(0, 1, 11) }, 394c58063dSHeiko Stuebner }; 404c58063dSHeiko Stuebner 414c58063dSHeiko Stuebner static const struct rockchip_grf_info rk3036_grf __initconst = { 424c58063dSHeiko Stuebner .values = rk3036_defaults, 434c58063dSHeiko Stuebner .num_values = ARRAY_SIZE(rk3036_defaults), 444c58063dSHeiko Stuebner }; 454c58063dSHeiko Stuebner 466e61c891SXiao Yao #define RK3128_GRF_SOC_CON0 0x140 476e61c891SXiao Yao 486e61c891SXiao Yao static const struct rockchip_grf_value rk3128_defaults[] __initconst = { 496e61c891SXiao Yao { "jtag switching", RK3128_GRF_SOC_CON0, HIWORD_UPDATE(0, 1, 8) }, 506e61c891SXiao Yao }; 516e61c891SXiao Yao 526e61c891SXiao Yao static const struct rockchip_grf_info rk3128_grf __initconst = { 536e61c891SXiao Yao .values = rk3128_defaults, 546e61c891SXiao Yao .num_values = ARRAY_SIZE(rk3128_defaults), 556e61c891SXiao Yao }; 566e61c891SXiao Yao 57e17ee5f0SShawn Lin #define RK3228_GRF_SOC_CON6 0x418 58e17ee5f0SShawn Lin 59e17ee5f0SShawn Lin static const struct rockchip_grf_value rk3228_defaults[] __initconst = { 60e17ee5f0SShawn Lin { "jtag switching", RK3228_GRF_SOC_CON6, HIWORD_UPDATE(0, 1, 8) }, 61e17ee5f0SShawn Lin }; 62e17ee5f0SShawn Lin 63e17ee5f0SShawn Lin static const struct rockchip_grf_info rk3228_grf __initconst = { 64e17ee5f0SShawn Lin .values = rk3228_defaults, 65e17ee5f0SShawn Lin .num_values = ARRAY_SIZE(rk3228_defaults), 66e17ee5f0SShawn Lin }; 67e17ee5f0SShawn Lin 684c58063dSHeiko Stuebner #define RK3288_GRF_SOC_CON0 0x244 69*bbdc00a7SDouglas Anderson #define RK3288_GRF_SOC_CON2 0x24c 704c58063dSHeiko Stuebner 714c58063dSHeiko Stuebner static const struct rockchip_grf_value rk3288_defaults[] __initconst = { 724c58063dSHeiko Stuebner { "jtag switching", RK3288_GRF_SOC_CON0, HIWORD_UPDATE(0, 1, 12) }, 73*bbdc00a7SDouglas Anderson { "pwm select", RK3288_GRF_SOC_CON2, HIWORD_UPDATE(1, 1, 0) }, 744c58063dSHeiko Stuebner }; 754c58063dSHeiko Stuebner 764c58063dSHeiko Stuebner static const struct rockchip_grf_info rk3288_grf __initconst = { 774c58063dSHeiko Stuebner .values = rk3288_defaults, 784c58063dSHeiko Stuebner .num_values = ARRAY_SIZE(rk3288_defaults), 794c58063dSHeiko Stuebner }; 804c58063dSHeiko Stuebner 81887758c3SShawn Lin #define RK3328_GRF_SOC_CON4 0x410 82887758c3SShawn Lin 83887758c3SShawn Lin static const struct rockchip_grf_value rk3328_defaults[] __initconst = { 84887758c3SShawn Lin { "jtag switching", RK3328_GRF_SOC_CON4, HIWORD_UPDATE(0, 1, 12) }, 85887758c3SShawn Lin }; 86887758c3SShawn Lin 87887758c3SShawn Lin static const struct rockchip_grf_info rk3328_grf __initconst = { 88887758c3SShawn Lin .values = rk3328_defaults, 89887758c3SShawn Lin .num_values = ARRAY_SIZE(rk3328_defaults), 90887758c3SShawn Lin }; 91887758c3SShawn Lin 924c58063dSHeiko Stuebner #define RK3368_GRF_SOC_CON15 0x43c 934c58063dSHeiko Stuebner 944c58063dSHeiko Stuebner static const struct rockchip_grf_value rk3368_defaults[] __initconst = { 954c58063dSHeiko Stuebner { "jtag switching", RK3368_GRF_SOC_CON15, HIWORD_UPDATE(0, 1, 13) }, 964c58063dSHeiko Stuebner }; 974c58063dSHeiko Stuebner 984c58063dSHeiko Stuebner static const struct rockchip_grf_info rk3368_grf __initconst = { 994c58063dSHeiko Stuebner .values = rk3368_defaults, 1004c58063dSHeiko Stuebner .num_values = ARRAY_SIZE(rk3368_defaults), 1014c58063dSHeiko Stuebner }; 1024c58063dSHeiko Stuebner 1034c58063dSHeiko Stuebner #define RK3399_GRF_SOC_CON7 0xe21c 1044c58063dSHeiko Stuebner 1054c58063dSHeiko Stuebner static const struct rockchip_grf_value rk3399_defaults[] __initconst = { 1064c58063dSHeiko Stuebner { "jtag switching", RK3399_GRF_SOC_CON7, HIWORD_UPDATE(0, 1, 12) }, 1074c58063dSHeiko Stuebner }; 1084c58063dSHeiko Stuebner 1094c58063dSHeiko Stuebner static const struct rockchip_grf_info rk3399_grf __initconst = { 1104c58063dSHeiko Stuebner .values = rk3399_defaults, 1114c58063dSHeiko Stuebner .num_values = ARRAY_SIZE(rk3399_defaults), 1124c58063dSHeiko Stuebner }; 1134c58063dSHeiko Stuebner 1144c58063dSHeiko Stuebner static const struct of_device_id rockchip_grf_dt_match[] __initconst = { 1154c58063dSHeiko Stuebner { 1164c58063dSHeiko Stuebner .compatible = "rockchip,rk3036-grf", 1174c58063dSHeiko Stuebner .data = (void *)&rk3036_grf, 1184c58063dSHeiko Stuebner }, { 1196e61c891SXiao Yao .compatible = "rockchip,rk3128-grf", 1206e61c891SXiao Yao .data = (void *)&rk3128_grf, 1216e61c891SXiao Yao }, { 122e17ee5f0SShawn Lin .compatible = "rockchip,rk3228-grf", 123e17ee5f0SShawn Lin .data = (void *)&rk3228_grf, 124e17ee5f0SShawn Lin }, { 1254c58063dSHeiko Stuebner .compatible = "rockchip,rk3288-grf", 1264c58063dSHeiko Stuebner .data = (void *)&rk3288_grf, 1274c58063dSHeiko Stuebner }, { 128887758c3SShawn Lin .compatible = "rockchip,rk3328-grf", 129887758c3SShawn Lin .data = (void *)&rk3328_grf, 130887758c3SShawn Lin }, { 1314c58063dSHeiko Stuebner .compatible = "rockchip,rk3368-grf", 1324c58063dSHeiko Stuebner .data = (void *)&rk3368_grf, 1334c58063dSHeiko Stuebner }, { 1344c58063dSHeiko Stuebner .compatible = "rockchip,rk3399-grf", 1354c58063dSHeiko Stuebner .data = (void *)&rk3399_grf, 1364c58063dSHeiko Stuebner }, 1374c58063dSHeiko Stuebner { /* sentinel */ }, 1384c58063dSHeiko Stuebner }; 1394c58063dSHeiko Stuebner 1404c58063dSHeiko Stuebner static int __init rockchip_grf_init(void) 1414c58063dSHeiko Stuebner { 1424c58063dSHeiko Stuebner const struct rockchip_grf_info *grf_info; 1434c58063dSHeiko Stuebner const struct of_device_id *match; 1444c58063dSHeiko Stuebner struct device_node *np; 1454c58063dSHeiko Stuebner struct regmap *grf; 1464c58063dSHeiko Stuebner int ret, i; 1474c58063dSHeiko Stuebner 1484c58063dSHeiko Stuebner np = of_find_matching_node_and_match(NULL, rockchip_grf_dt_match, 1494c58063dSHeiko Stuebner &match); 1504c58063dSHeiko Stuebner if (!np) 1514c58063dSHeiko Stuebner return -ENODEV; 1524c58063dSHeiko Stuebner if (!match || !match->data) { 1534c58063dSHeiko Stuebner pr_err("%s: missing grf data\n", __func__); 1544c58063dSHeiko Stuebner return -EINVAL; 1554c58063dSHeiko Stuebner } 1564c58063dSHeiko Stuebner 1574c58063dSHeiko Stuebner grf_info = match->data; 1584c58063dSHeiko Stuebner 1594c58063dSHeiko Stuebner grf = syscon_node_to_regmap(np); 1604c58063dSHeiko Stuebner if (IS_ERR(grf)) { 1614c58063dSHeiko Stuebner pr_err("%s: could not get grf syscon\n", __func__); 1624c58063dSHeiko Stuebner return PTR_ERR(grf); 1634c58063dSHeiko Stuebner } 1644c58063dSHeiko Stuebner 1654c58063dSHeiko Stuebner for (i = 0; i < grf_info->num_values; i++) { 1664c58063dSHeiko Stuebner const struct rockchip_grf_value *val = &grf_info->values[i]; 1674c58063dSHeiko Stuebner 1684c58063dSHeiko Stuebner pr_debug("%s: adjusting %s in %#6x to %#10x\n", __func__, 1694c58063dSHeiko Stuebner val->desc, val->reg, val->val); 1704c58063dSHeiko Stuebner ret = regmap_write(grf, val->reg, val->val); 1714c58063dSHeiko Stuebner if (ret < 0) 1724c58063dSHeiko Stuebner pr_err("%s: write to %#6x failed with %d\n", 1734c58063dSHeiko Stuebner __func__, val->reg, ret); 1744c58063dSHeiko Stuebner } 1754c58063dSHeiko Stuebner 1764c58063dSHeiko Stuebner return 0; 1774c58063dSHeiko Stuebner } 1784c58063dSHeiko Stuebner postcore_initcall(rockchip_grf_init); 179