evie/android_kernel_oneplus_msm8998
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clk: msm: Add reset support in dummy clock driver

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Some pass-through devices on msm8996 virtual platform need
dummy clock reset.

Change-Id: I88f4028fe56e428f12b2149a4413c3328da880bb
Signed-off-by: Ramachandran Venkataramani <ramavenk@codeaurora.org>
Signed-off-by: Zhiqiang Tu <ztu@codeaurora.org>
This commit is contained in:
Zhiqiang Tu 2018-02-13 14:30:27 +08:00
parent 9d5748ab14
commit 19d543a972
1 changed files with 53 additions and 2 deletions
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55
drivers/clk/msm/clock-dummy.c
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@ -1,4 +1,4 @@
/* Copyright (c) 2011,2013-2014 The Linux Foundation. All rights reserved. /* Copyright (c) 2011,2013-2014,2018 The Linux Foundation. All rights reserved.
* *
* This program is free software; you can redistribute it and/or modify * This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and * it under the terms of the GNU General Public License version 2 and
@ -14,6 +14,53 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/of.h> #include <linux/of.h>
#include <soc/qcom/msm-clock-controller.h> #include <soc/qcom/msm-clock-controller.h>
#include <linux/reset-controller.h>
#define DUMMY_RESET_NR 20
static int dummy_reset_assert(struct reset_controller_dev *rcdev,
unsigned long id)
{
return 0;
}
static int dummy_reset_deassert(struct reset_controller_dev *rcdev,
unsigned long id)
{
return 0;
}
static int dummy_reset(struct reset_controller_dev *rcdev, unsigned long id)
{
return 0;
}
static struct reset_control_ops dummy_reset_ops = {
.reset = dummy_reset,
.assert = dummy_reset_assert,
.deassert = dummy_reset_deassert,
};
static int dummy_reset_controller_register(struct platform_device *pdev)
{
struct reset_controller_dev *prcdev;
int ret = 0;
prcdev = devm_kzalloc(&pdev->dev, sizeof(*prcdev), GFP_KERNEL);
if (!prcdev)
return -ENOMEM;
prcdev->of_node = pdev->dev.of_node;
prcdev->ops = &dummy_reset_ops;
prcdev->owner = pdev->dev.driver->owner;
prcdev->nr_resets = DUMMY_RESET_NR;
ret = reset_controller_register(prcdev);
if (ret)
dev_err(&pdev->dev, "Failed to register reset controller\n");
return ret;
}
static int dummy_clk_reset(struct clk *clk, enum clk_reset_action action) static int dummy_clk_reset(struct clk *clk, enum clk_reset_action action)
{ {
@ -99,7 +146,11 @@ static int msm_clock_dummy_probe(struct platform_device *pdev)
ret = of_clk_add_provider(pdev->dev.of_node, of_dummy_get, NULL); ret = of_clk_add_provider(pdev->dev.of_node, of_dummy_get, NULL);
if (ret) if (ret)
return -ENOMEM; return ret;
ret = dummy_reset_controller_register(pdev);
if (ret)
return ret;
dev_info(&pdev->dev, "Registered DUMMY provider.\n"); dev_info(&pdev->dev, "Registered DUMMY provider.\n");
return ret; return ret;