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// SPDX-License-Identifier: GPL-2.0-only
/*
* Rockchip Generic Register Files setup
*
* Copyright (c) 2016 Heiko Stuebner <heiko@sntech.de>
*/
#include <linux/err.h>
#include <linux/hw_bitfield.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
struct rockchip_grf_value {
const char *desc;
u32 reg;
u32 val;
};
struct rockchip_grf_info {
const struct rockchip_grf_value *values;
int num_values;
};
#define RK3036_GRF_SOC_CON0 0x140
static const struct rockchip_grf_value rk3036_defaults[] __initconst = {
/*
* Disable auto jtag/sdmmc switching that causes issues with the
* clock-framework and the mmc controllers making them unreliable.
*/
{ "jtag switching", RK3036_GRF_SOC_CON0, FIELD_PREP_WM16_CONST(BIT(11), 0) },
};
static const struct rockchip_grf_info rk3036_grf __initconst = {
.values = rk3036_defaults,
.num_values = ARRAY_SIZE(rk3036_defaults),
};
#define RK3128_GRF_SOC_CON0 0x140
#define RK3128_GRF_SOC_CON1 0x144
static const struct rockchip_grf_value rk3128_defaults[] __initconst = {
{ "jtag switching", RK3128_GRF_SOC_CON0, FIELD_PREP_WM16_CONST(BIT(8), 0) },
{ "vpu main clock", RK3128_GRF_SOC_CON1, FIELD_PREP_WM16_CONST(BIT(10), 0) },
};
static const struct rockchip_grf_info rk3128_grf __initconst = {
.values = rk3128_defaults,
.num_values = ARRAY_SIZE(rk3128_defaults),
};
#define RK3228_GRF_SOC_CON6 0x418
static const struct rockchip_grf_value rk3228_defaults[] __initconst = {
{ "jtag switching", RK3228_GRF_SOC_CON6, FIELD_PREP_WM16_CONST(BIT(8), 0) },
};
static const struct rockchip_grf_info rk3228_grf __initconst = {
.values = rk3228_defaults,
.num_values = ARRAY_SIZE(rk3228_defaults),
};
#define RK3288_GRF_SOC_CON0 0x244
#define RK3288_GRF_SOC_CON2 0x24c
static const struct rockchip_grf_value rk3288_defaults[] __initconst = {
{ "jtag switching", RK3288_GRF_SOC_CON0, FIELD_PREP_WM16_CONST(BIT(12), 0) },
{ "pwm select", RK3288_GRF_SOC_CON2, FIELD_PREP_WM16_CONST(BIT(0), 1) },
};
static const struct rockchip_grf_info rk3288_grf __initconst = {
.values = rk3288_defaults,
.num_values = ARRAY_SIZE(rk3288_defaults),
};
#define RK3328_GRF_SOC_CON4 0x410
static const struct rockchip_grf_value rk3328_defaults[] __initconst = {
{ "jtag switching", RK3328_GRF_SOC_CON4, FIELD_PREP_WM16_CONST(BIT(12), 0) },
};
static const struct rockchip_grf_info rk3328_grf __initconst = {
.values = rk3328_defaults,
.num_values = ARRAY_SIZE(rk3328_defaults),
};
#define RK3368_GRF_SOC_CON15 0x43c
static const struct rockchip_grf_value rk3368_defaults[] __initconst = {
{ "jtag switching", RK3368_GRF_SOC_CON15, FIELD_PREP_WM16_CONST(BIT(13), 0) },
};
static const struct rockchip_grf_info rk3368_grf __initconst = {
.values = rk3368_defaults,
.num_values = ARRAY_SIZE(rk3368_defaults),
};
#define RK3399_GRF_SOC_CON7 0xe21c
static const struct rockchip_grf_value rk3399_defaults[] __initconst = {
{ "jtag switching", RK3399_GRF_SOC_CON7, FIELD_PREP_WM16_CONST(BIT(12), 0) },
};
static const struct rockchip_grf_info rk3399_grf __initconst = {
.values = rk3399_defaults,
.num_values = ARRAY_SIZE(rk3399_defaults),
};
#define RK3566_GRF_USB3OTG0_CON1 0x0104
static const struct rockchip_grf_value rk3566_defaults[] __initconst = {
{ "usb3otg port switch", RK3566_GRF_USB3OTG0_CON1, FIELD_PREP_WM16_CONST(BIT(12), 0) },
{ "usb3otg clock switch", RK3566_GRF_USB3OTG0_CON1, FIELD_PREP_WM16_CONST(BIT(7), 1) },
{ "usb3otg disable usb3", RK3566_GRF_USB3OTG0_CON1, FIELD_PREP_WM16_CONST(BIT(0), 1) },
};
static const struct rockchip_grf_info rk3566_pipegrf __initconst = {
.values = rk3566_defaults,
.num_values = ARRAY_SIZE(rk3566_defaults),
};
#define RK3576_SYSGRF_SOC_CON1 0x0004
static const struct rockchip_grf_value rk3576_defaults_sys_grf[] __initconst = {
{ "i3c0 weakpull", RK3576_SYSGRF_SOC_CON1, FIELD_PREP_WM16_CONST(GENMASK(7, 6), 3) },
{ "i3c1 weakpull", RK3576_SYSGRF_SOC_CON1, FIELD_PREP_WM16_CONST(GENMASK(9, 8), 3) },
};
static const struct rockchip_grf_info rk3576_sysgrf __initconst = {
.values = rk3576_defaults_sys_grf,
.num_values = ARRAY_SIZE(rk3576_defaults_sys_grf),
};
#define RK3576_IOCGRF_MISC_CON 0x04F0
static const struct rockchip_grf_value rk3576_defaults_ioc_grf[] __initconst = {
{ "jtag switching", RK3576_IOCGRF_MISC_CON, FIELD_PREP_WM16_CONST(BIT(1), 0) },
};
static const struct rockchip_grf_info rk3576_iocgrf __initconst = {
.values = rk3576_defaults_ioc_grf,
.num_values = ARRAY_SIZE(rk3576_defaults_ioc_grf),
};
#define RK3588_GRF_SOC_CON6 0x0318
static const struct rockchip_grf_value rk3588_defaults[] __initconst = {
{ "jtag switching", RK3588_GRF_SOC_CON6, FIELD_PREP_WM16_CONST(BIT(14), 0) },
};
static const struct rockchip_grf_info rk3588_sysgrf __initconst = {
.values = rk3588_defaults,
.num_values = ARRAY_SIZE(rk3588_defaults),
};
static const struct of_device_id rockchip_grf_dt_match[] __initconst = {
{
.compatible = "rockchip,rk3036-grf",
.data = (void *)&rk3036_grf,
}, {
.compatible = "rockchip,rk3128-grf",
.data = (void *)&rk3128_grf,
}, {
.compatible = "rockchip,rk3228-grf",
.data = (void *)&rk3228_grf,
}, {
.compatible = "rockchip,rk3288-grf",
.data = (void *)&rk3288_grf,
}, {
.compatible = "rockchip,rk3328-grf",
.data = (void *)&rk3328_grf,
}, {
.compatible = "rockchip,rk3368-grf",
.data = (void *)&rk3368_grf,
}, {
.compatible = "rockchip,rk3399-grf",
.data = (void *)&rk3399_grf,
}, {
.compatible = "rockchip,rk3566-pipe-grf",
.data = (void *)&rk3566_pipegrf,
}, {
.compatible = "rockchip,rk3576-sys-grf",
.data = (void *)&rk3576_sysgrf,
}, {
.compatible = "rockchip,rk3576-ioc-grf",
.data = (void *)&rk3576_iocgrf,
}, {
.compatible = "rockchip,rk3588-sys-grf",
.data = (void *)&rk3588_sysgrf,
},
{ /* sentinel */ },
};
static int __init rockchip_grf_init(void)
{
const struct rockchip_grf_info *grf_info;
const struct of_device_id *match;
struct device_node *np;
struct regmap *grf;
int ret, i;
np = of_find_matching_node_and_match(NULL, rockchip_grf_dt_match,
&match);
if (!np)
return -ENODEV;
if (!match || !match->data) {
pr_err("%s: missing grf data\n", __func__);
of_node_put(np);
return -EINVAL;
}
grf_info = match->data;
grf = syscon_node_to_regmap(np);
of_node_put(np);
if (IS_ERR(grf)) {
pr_err("%s: could not get grf syscon\n", __func__);
return PTR_ERR(grf);
}
for (i = 0; i < grf_info->num_values; i++) {
const struct rockchip_grf_value *val = &grf_info->values[i];
pr_debug("%s: adjusting %s in %#6x to %#10x\n", __func__,
val->desc, val->reg, val->val);
ret = regmap_write(grf, val->reg, val->val);
if (ret < 0)
pr_err("%s: write to %#6x failed with %d\n",
__func__, val->reg, ret);
}
return 0;
}
postcore_initcall(rockchip_grf_init);
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