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Commit 30cfcb0b authored by Vivek Aknurwar's avatar Vivek Aknurwar Committed by Gerrit - the friendly Code Review server
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clk: qcom: Add API to query corner voltage on given clk frequency 



Add new API for clients to query corner voltage required by a
given frequency.

Change-Id: Ic469c36e016899d882ca084f74e0d2cb2020476c
Signed-off-by: default avatarVivek Aknurwar <viveka@codeaurora.org>
parent bf4eaa44

drivers/clk/qcom/common.c

+20 −0
Original line number Diff line number Diff line
@@ -11,12 +11,14 @@ 
#include <linux/clk-provider.h>

#include <linux/reset-controller.h>

#include <linux/of.h>

#include <linux/clk/qcom.h>



#include "common.h"

#include "clk-rcg.h"

#include "clk-regmap.h"

#include "reset.h"

#include "gdsc.h"

#include "vdd-level.h"



struct qcom_cc {

	struct qcom_reset_controller reset;
@@ -371,4 +373,22 @@ void qcom_cc_sync_state(struct device *dev, const struct qcom_cc_desc *desc) 
}

EXPORT_SYMBOL(qcom_cc_sync_state);



int qcom_clk_get_voltage(struct clk *clk, unsigned long rate)

{

	struct clk_regmap *rclk;

	struct clk_hw *hw = __clk_get_hw(clk);

	int vdd_level;



	if (!clk_is_regmap_clk(hw))

		return -EINVAL;



	rclk = to_clk_regmap(hw);

	vdd_level = clk_find_vdd_level(hw, &rclk->vdd_data, rate);

	if (vdd_level < 0)

		return vdd_level;



	return rclk->vdd_data.vdd_class->vdd_uv[vdd_level];

}

EXPORT_SYMBOL(qcom_clk_get_voltage);



MODULE_LICENSE("GPL v2");

drivers/clk/qcom/vdd-class.c

+3 −0
Original line number Diff line number Diff line
@@ -149,6 +149,9 @@ int clk_find_vdd_level(struct clk_hw *hw, 
{

	int level;



	if (!vdd_data->num_rate_max)

		return -ENODATA;



	/*

	 * For certain PLLs, due to the limitation in the bits allocated for

	 * programming the fractional divider, the actual rate of the PLL will

include/linux/clk/qcom.h

0 → 100644
+13 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (c) 2020 The Linux Foundation. All rights reserved.

 */



#ifndef __LINUX_CLK_QCOM_H_

#define __LINUX_CLK_QCOM_H_



#include <linux/clk-provider.h>



int qcom_clk_get_voltage(struct clk *clk, unsigned long rate);



#endif  /* __LINUX_CLK_QCOM_H_ */