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clk: qcom: Add qcom implementation of qcom_clk_set_flags

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The qcom_clk_set_flags API would be used to set/clear the memory
flags for the desired branches.

Change-Id: I58b2347f63d382168b61dd04ead57ad114559eb2
Signed-off-by: Taniya Das <tdas@codeaurora.org>
This commit is contained in:
Taniya Das 2020-04-23 23:45:59 +05:30 committed by Mike Tipton
parent 5f22a48d6d
commit 45055bdb07
2 changed files with 65 additions and 2 deletions
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55
drivers/clk/qcom/clk-branch.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2013, 2016, The Linux Foundation. All rights reserved.
* Copyright (c) 2013, 2016, 2020, The Linux Foundation. All rights reserved.
*/
#include <linux/kernel.h>
@ -11,6 +11,7 @@
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/regmap.h>
#include <linux/clk/qcom.h>
#include "clk-branch.h"
@ -210,3 +211,55 @@ const struct clk_ops clk_branch_simple_ops = {
.is_enabled = clk_is_enabled_regmap,
};
EXPORT_SYMBOL_GPL(clk_branch_simple_ops);
int qcom_clk_set_flags(struct clk *clk, unsigned long flags)
{
struct clk_hw *hw;
struct clk_branch *br;
u32 cbcr_val = 0, cbcr_mask;
int ret;
if (IS_ERR_OR_NULL(clk))
return 0;
hw = __clk_get_hw(clk);
if (IS_ERR_OR_NULL(hw))
return -EINVAL;
switch (flags) {
case CLKFLAG_PERIPH_OFF_SET:
cbcr_val = cbcr_mask = BIT(12);
break;
case CLKFLAG_PERIPH_OFF_CLEAR:
cbcr_mask = BIT(12);
break;
case CLKFLAG_RETAIN_PERIPH:
cbcr_val = cbcr_mask = BIT(13);
break;
case CLKFLAG_NORETAIN_PERIPH:
cbcr_mask = BIT(13);
break;
case CLKFLAG_RETAIN_MEM:
cbcr_val = cbcr_mask = BIT(14);
break;
case CLKFLAG_NORETAIN_MEM:
cbcr_mask = BIT(14);
break;
default:
return -EINVAL;
}
br = to_clk_branch(hw);
ret = regmap_update_bits(br->clkr.regmap, br->halt_reg, cbcr_mask,
cbcr_val);
if (ret)
return ret;
/* Make sure power is enabled/disabled before returning. */
mb();
udelay(1);
return 0;
}
EXPORT_SYMBOL(qcom_clk_set_flags);

12
include/linux/clk/qcom.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2020 The Linux Foundation. All rights reserved.
* Copyright (c) 2020, The Linux Foundation. All rights reserved.
*/
#ifndef __LINUX_CLK_QCOM_H_
@ -8,6 +8,16 @@
#include <linux/clk-provider.h>
enum branch_mem_flags {
CLKFLAG_RETAIN_PERIPH,
CLKFLAG_NORETAIN_PERIPH,
CLKFLAG_RETAIN_MEM,
CLKFLAG_NORETAIN_MEM,
CLKFLAG_PERIPH_OFF_SET,
CLKFLAG_PERIPH_OFF_CLEAR,
};
int qcom_clk_get_voltage(struct clk *clk, unsigned long rate);
int qcom_clk_set_flags(struct clk *clk, unsigned long flags);
#endif /* __LINUX_CLK_QCOM_H_ */