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// SPDX-License-Identifier: GPL-2.0
/*
* RZ/V2H System controller (SYS) driver
*
* Copyright (C) 2025 Renesas Electronics Corp.
*/
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/io.h>
#include "rz-sysc.h"
/* Register Offsets */
#define SYS_LSI_MODE 0x300
/*
* BOOTPLLCA[1:0]
* [0,0] => 1.1GHZ
* [0,1] => 1.5GHZ
* [1,0] => 1.6GHZ
* [1,1] => 1.7GHZ
*/
#define SYS_LSI_MODE_STAT_BOOTPLLCA55 GENMASK(12, 11)
#define SYS_LSI_MODE_CA55_1_7GHZ 0x3
#define SYS_LSI_PRR 0x308
#define SYS_LSI_PRR_GPU_DIS BIT(0)
#define SYS_LSI_PRR_ISP_DIS BIT(4)
static void rzv2h_sys_print_id(struct device *dev,
void __iomem *sysc_base,
struct soc_device_attribute *soc_dev_attr)
{
bool gpu_enabled, isp_enabled;
u32 prr_val, mode_val;
prr_val = readl(sysc_base + SYS_LSI_PRR);
mode_val = readl(sysc_base + SYS_LSI_MODE);
/* Check GPU and ISP configuration */
gpu_enabled = !(prr_val & SYS_LSI_PRR_GPU_DIS);
isp_enabled = !(prr_val & SYS_LSI_PRR_ISP_DIS);
dev_info(dev, "Detected Renesas %s %s Rev %s%s%s\n",
soc_dev_attr->family, soc_dev_attr->soc_id, soc_dev_attr->revision,
gpu_enabled ? " with GE3D (Mali-G31)" : "",
isp_enabled ? " with ISP (Mali-C55)" : "");
/* Check CA55 PLL configuration */
if (FIELD_GET(SYS_LSI_MODE_STAT_BOOTPLLCA55, mode_val) != SYS_LSI_MODE_CA55_1_7GHZ)
dev_warn(dev, "CA55 PLL is not set to 1.7GHz\n");
}
static const struct rz_sysc_soc_id_init_data rzv2h_sys_soc_id_init_data __initconst = {
.family = "RZ/V2H",
.id = 0x847a447,
.devid_offset = 0x304,
.revision_mask = GENMASK(31, 28),
.specific_id_mask = GENMASK(27, 0),
.print_id = rzv2h_sys_print_id,
};
const struct rz_sysc_init_data rzv2h_sys_init_data = {
.soc_id_init_data = &rzv2h_sys_soc_id_init_data,
};
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