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Commit 0ff8097b authored by Taniya Das's avatar Taniya Das
Browse files

clk: qcom: Add qcom implementation of qcom_clk_set_flags 



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: default avatarTaniya Das <tdas@codeaurora.org>
parent 6e625d33

drivers/clk/qcom/clk-branch.c

+54 −1
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2013, 2016-2019, 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"

#include "clk-debug.h"
@@ -272,3 +273,55 @@ 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);

include/linux/clk/qcom.h

+11 −1
Original line number Diff line number Diff line 
/* 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_ */