cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

clk-versatile.c (2522B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Clock driver for the ARM Integrator/AP, Integrator/CP, Versatile AB and
      4 * Versatile PB boards.
      5 * Copyright (C) 2012 Linus Walleij
      6 */
      7#include <linux/clk-provider.h>
      8#include <linux/err.h>
      9#include <linux/of.h>
     10#include <linux/of_address.h>
     11
     12#include "icst.h"
     13#include "clk-icst.h"
     14
     15#define INTEGRATOR_HDR_LOCK_OFFSET	0x14
     16
     17#define VERSATILE_SYS_OSCCLCD_OFFSET	0x1c
     18#define VERSATILE_SYS_LOCK_OFFSET	0x20
     19
     20/* Base offset for the core module */
     21static void __iomem *cm_base;
     22
     23static const struct icst_params cp_auxosc_params = {
     24	.vco_max	= ICST525_VCO_MAX_5V,
     25	.vco_min	= ICST525_VCO_MIN,
     26	.vd_min 	= 8,
     27	.vd_max 	= 263,
     28	.rd_min 	= 3,
     29	.rd_max 	= 65,
     30	.s2div		= icst525_s2div,
     31	.idx2s		= icst525_idx2s,
     32};
     33
     34static const struct clk_icst_desc cm_auxosc_desc __initconst = {
     35	.params = &cp_auxosc_params,
     36	.vco_offset = 0x1c,
     37	.lock_offset = INTEGRATOR_HDR_LOCK_OFFSET,
     38};
     39
     40static const struct icst_params versatile_auxosc_params = {
     41	.vco_max	= ICST307_VCO_MAX,
     42	.vco_min	= ICST307_VCO_MIN,
     43	.vd_min		= 4 + 8,
     44	.vd_max		= 511 + 8,
     45	.rd_min		= 1 + 2,
     46	.rd_max		= 127 + 2,
     47	.s2div		= icst307_s2div,
     48	.idx2s		= icst307_idx2s,
     49};
     50
     51static const struct clk_icst_desc versatile_auxosc_desc __initconst = {
     52	.params = &versatile_auxosc_params,
     53	.vco_offset = VERSATILE_SYS_OSCCLCD_OFFSET,
     54	.lock_offset = VERSATILE_SYS_LOCK_OFFSET,
     55};
     56static void __init cm_osc_setup(struct device_node *np,
     57				const struct clk_icst_desc *desc)
     58{
     59	struct clk *clk;
     60	const char *clk_name = np->name;
     61	const char *parent_name;
     62
     63	if (!cm_base) {
     64		/* Remap the core module base if not done yet */
     65		struct device_node *parent;
     66
     67		parent = of_get_parent(np);
     68		if (!parent) {
     69			pr_err("no parent on core module clock\n");
     70			return;
     71		}
     72		cm_base = of_iomap(parent, 0);
     73		of_node_put(parent);
     74		if (!cm_base) {
     75			pr_err("could not remap core module base\n");
     76			return;
     77		}
     78	}
     79
     80	parent_name = of_clk_get_parent_name(np, 0);
     81	clk = icst_clk_register(NULL, desc, clk_name, parent_name, cm_base);
     82	if (!IS_ERR(clk))
     83		of_clk_add_provider(np, of_clk_src_simple_get, clk);
     84}
     85
     86static void __init of_integrator_cm_osc_setup(struct device_node *np)
     87{
     88	cm_osc_setup(np, &cm_auxosc_desc);
     89}
     90CLK_OF_DECLARE(integrator_cm_auxosc_clk,
     91	"arm,integrator-cm-auxosc", of_integrator_cm_osc_setup);
     92
     93static void __init of_versatile_cm_osc_setup(struct device_node *np)
     94{
     95	cm_osc_setup(np, &versatile_auxosc_desc);
     96}
     97CLK_OF_DECLARE(versatile_cm_auxosc_clk,
     98	       "arm,versatile-cm-auxosc", of_versatile_cm_osc_setup);