Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ac279b31 authored by David Collins's avatar David Collins
Browse files

clk: qcom: gdsc-regulator: add support for enabling retention registers 



Add support for the RETAIN_FF_ENABLE feature which enables the
usage of retention registers.  These registers maintain their
state after disabling and re-enabling a GDSC.

Change-Id: Iad19bfb2cb73fa76aad230bad6372d68b447b4e2
Signed-off-by: default avatarDavid Collins <collinsd@codeaurora.org>
parent bb3b0cc0

drivers/clk/qcom/gdsc-regulator.c

+10 −1
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.

 * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.

 */



#include <linux/kernel.h>
@@ -26,6 +26,7 @@ 
#define PWR_ON_MASK		BIT(31)

#define CLK_DIS_WAIT_MASK	(0xF << 12)

#define CLK_DIS_WAIT_SHIFT	(12)

#define RETAIN_FF_ENABLE_MASK	BIT(11)

#define SW_OVERRIDE_MASK	BIT(2)

#define HW_CONTROL_MASK		BIT(1)

#define SW_COLLAPSE_MASK	BIT(0)
@@ -57,6 +58,7 @@ struct gdsc { 
	bool			toggle_mem;

	bool			toggle_periph;

	bool			toggle_logic;

	bool			retain_ff_enable;

	bool			resets_asserted;

	bool			root_en;

	bool			force_root_en;
@@ -311,6 +313,11 @@ static int gdsc_enable(struct regulator_dev *rdev) 
				goto end;

			}

		}



		if (sc->retain_ff_enable && !(regval & RETAIN_FF_ENABLE_MASK)) {

			regval |= RETAIN_FF_ENABLE_MASK;

			regmap_write(sc->regmap, REG_OFFSET, regval);

		}

	} else {

		for (i = 0; i < sc->reset_count; i++)

			reset_control_deassert(sc->reset_clocks[i]);
@@ -735,6 +742,8 @@ static int gdsc_probe(struct platform_device *pdev) 
	retain_periph = of_property_read_bool(pdev->dev.of_node,

					    "qcom,retain-periph");

	sc->toggle_periph = !retain_periph;

	sc->retain_ff_enable = of_property_read_bool(pdev->dev.of_node,

						"qcom,retain-regs");

	sc->toggle_logic = !of_property_read_bool(pdev->dev.of_node,

						"qcom,skip-logic-collapse");

	support_hw_trigger = of_property_read_bool(pdev->dev.of_node,