// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) STMicroelectronics 2017
* Author: Gabriel Fernandez <gabriel.fernandez@st.com> for STMicroelectronics.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/regmap.h>
#include <dt-bindings/clock/stm32h7-clks.h>
/* Reset Clock Control Registers */
#define RCC_CR 0x00
#define RCC_CFGR 0x10
#define RCC_D1CFGR 0x18
#define RCC_D2CFGR 0x1C
#define RCC_D3CFGR 0x20
#define RCC_PLLCKSELR 0x28
#define RCC_PLLCFGR 0x2C
#define RCC_PLL1DIVR 0x30
#define RCC_PLL1FRACR 0x34
#define RCC_PLL2DIVR 0x38
#define RCC_PLL2FRACR 0x3C
#define RCC_PLL3DIVR 0x40
#define RCC_PLL3FRACR 0x44
#define RCC_D1CCIPR 0x4C
#define RCC_D2CCIP1R 0x50
#define RCC_D2CCIP2R 0x54
#define RCC_D3CCIPR 0x58
#define RCC_BDCR 0x70
#define RCC_CSR 0x74
#define RCC_AHB3ENR 0xD4
#define RCC_AHB1ENR 0xD8
#define RCC_AHB2ENR 0xDC
#define RCC_AHB4ENR 0xE0
#define RCC_APB3ENR 0xE4
#define RCC_APB1LENR 0xE8
#define RCC_APB1HENR 0xEC
#define RCC_APB2ENR 0xF0
#define RCC_APB4ENR 0xF4
static DEFINE_SPINLOCK(stm32rcc_lock);
static void __iomem *base;
static struct clk_hw **hws;
/* System clock parent */
static const char * const sys_src[] = {
"hsi_ck", "csi_ck", "hse_ck", "pll1_p" };
static const char * const tracein_src[] = {
"hsi_ck", "csi_ck", "hse_ck", "pll1_r" };
static const char * const per_src[] = {
"hsi_ker", "csi_ker", "hse_ck", "disabled" };
static const char * const pll_src[] = {
"hsi_ck", "csi_ck", "hse_ck", "no clock" };
static const char * const sdmmc_src[] = { "pll1_q", "pll2_r" };
static const char * const dsi_src[] = { "ck_dsi_phy", "pll2_q" };
static const char * const qspi_src[] = {
"hclk", "pll1_q", "pll2_r", "per_ck" };
static const char * const fmc_src[] = {
"hclk", "pll1_q", "pll2_r", "per_ck" };
/* Kernel clock parent */
static const char * const swp_src[] = { "pclk1", "hsi_ker" };
static const char * const fdcan_src[] = 