mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-12 05:24:12 +08:00
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* OMAP2/3 interface clock control
|
|
*
|
|
* Copyright (C) 2011 Nokia Corporation
|
|
* Paul Walmsley
|
|
*/
|
|
#undef DEBUG
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/io.h>
|
|
#include <linux/clk/ti.h>
|
|
|
|
#include "clock.h"
|
|
|
|
/* Register offsets */
|
|
#define OMAP24XX_CM_FCLKEN2 0x04
|
|
#define CM_AUTOIDLE 0x30
|
|
#define CM_ICLKEN 0x10
|
|
#define CM_IDLEST 0x20
|
|
|
|
#define OMAP24XX_CM_IDLEST_VAL 0
|
|
|
|
/* Private functions */
|
|
|
|
/* XXX */
|
|
void omap2_clkt_iclk_allow_idle(struct clk_hw_omap *clk)
|
|
{
|
|
u32 v;
|
|
struct clk_omap_reg r;
|
|
|
|
memcpy(&r, &clk->enable_reg, sizeof(r));
|
|
r.offset ^= (CM_AUTOIDLE ^ CM_ICLKEN);
|
|
|
|
v = ti_clk_ll_ops->clk_readl(&r);
|
|
v |= (1 << clk->enable_bit);
|
|
ti_clk_ll_ops->clk_writel(v, &r);
|
|
}
|
|
|
|
/* XXX */
|
|
void omap2_clkt_iclk_deny_idle(struct clk_hw_omap *clk)
|
|
{
|
|
u32 v;
|
|
struct clk_omap_reg r;
|
|
|
|
memcpy(&r, &clk->enable_reg, sizeof(r));
|
|
|
|
r.offset ^= (CM_AUTOIDLE ^ CM_ICLKEN);
|
|
|
|
v = ti_clk_ll_ops->clk_readl(&r);
|
|
v &= ~(1 << clk->enable_bit);
|
|
ti_clk_ll_ops->clk_writel(v, &r);
|
|
}
|
|
|
|
/**
|
|
* omap2430_clk_i2chs_find_idlest - return CM_IDLEST info for 2430 I2CHS
|
|
* @clk: struct clk * being enabled
|
|
* @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
|
|
* @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
|
|
* @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
|
|
*
|
|
* OMAP2430 I2CHS CM_IDLEST bits are in CM_IDLEST1_CORE, but the
|
|
* CM_*CLKEN bits are in CM_{I,F}CLKEN2_CORE. This custom function
|
|
* passes back the correct CM_IDLEST register address for I2CHS
|
|
* modules. No return value.
|
|
*/
|
|
static void omap2430_clk_i2chs_find_idlest(struct clk_hw_omap *clk,
|
|
struct clk_omap_reg *idlest_reg,
|
|
u8 *idlest_bit,
|
|
u8 *idlest_val)
|
|
{
|
|
memcpy(idlest_reg, &clk->enable_reg, sizeof(*idlest_reg));
|
|
idlest_reg->offset ^= (OMAP24XX_CM_FCLKEN2 ^ CM_IDLEST);
|
|
*idlest_bit = clk->enable_bit;
|
|
*idlest_val = OMAP24XX_CM_IDLEST_VAL;
|
|
}
|
|
|
|
/* Public data */
|
|
|
|
const struct clk_hw_omap_ops clkhwops_iclk = {
|
|
.allow_idle = omap2_clkt_iclk_allow_idle,
|
|
.deny_idle = omap2_clkt_iclk_deny_idle,
|
|
};
|
|
|
|
const struct clk_hw_omap_ops clkhwops_iclk_wait = {
|
|
.allow_idle = omap2_clkt_iclk_allow_idle,
|
|
.deny_idle = omap2_clkt_iclk_deny_idle,
|
|
.find_idlest = omap2_clk_dflt_find_idlest,
|
|
.find_companion = omap2_clk_dflt_find_companion,
|
|
};
|
|
|
|
/* 2430 I2CHS has non-standard IDLEST register */
|
|
const struct clk_hw_omap_ops clkhwops_omap2430_i2chs_wait = {
|
|
.find_idlest = omap2430_clk_i2chs_find_idlest,
|
|
.find_companion = omap2_clk_dflt_find_companion,
|
|
};
|