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Commit 89d7b6ef authored by Minghao Zhang's avatar Minghao Zhang
Browse files

soc: qcom: ddr_stats: update driver to get reg in probe 



This change optimizes to get reg during probe.
With this change no need to ioremap_nocache() reg for every
ddr_stats_show() call.

Change-Id: Ieb38280d1f03e1d613e638a7532b7b014525fbf1
Signed-off-by: default avatarTushar Nimkar <tnimkar@codeaurora.org>
Signed-off-by: default avatarMinghao Zhang <minghao@codeaurora.org>
parent 45a12290

drivers/soc/qcom/ddr_stats.c

+26 −24
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only



/*

 * Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.

 * Copyright (c) 2019-2021, The Linux Foundation. All rights reserved.

 */



#define pr_fmt(fmt) "%s: " fmt, __func__
@@ -37,8 +37,7 @@ 
#endif



struct ddr_stats_platform_data {

	phys_addr_t phys_addr_base;

	u32 phys_size;

	void __iomem *reg;

};



struct stats_entry {
@@ -59,6 +58,8 @@ struct ddr_stats_kobj_attr { 
	struct ddr_stats_platform_data *pd;

};



static struct ddr_stats_platform_data *ddr_pdata;



static inline u64 get_time_in_msec(u64 counter)

{

	do_div(counter, MSM_ARCH_TIMER_FREQ);
@@ -147,22 +148,10 @@ static ssize_t ddr_stats_show(struct kobject *kobj, 
	struct ddr_stats_platform_data *pdata = NULL;

	void __iomem *reg;

	ssize_t length;

	u32 key, entry_count;

	u32 entry_count;



	pdata = GET_PDATA_OF_ATTR(attr);



	reg = ioremap_nocache(pdata->phys_addr_base, pdata->phys_size);

	if (!reg) {

		pr_err("ERROR could not ioremap start=%pa, len=%u\n",

		       &pdata->phys_addr_base, pdata->phys_size);

		return 0;

	}



	key = readl_relaxed(reg + offsetof(struct ddr_stats_data, key));

	if (key != MAGIC_KEY1) {

		pr_err("Invalid key\n");

		return 0;

	}

	reg = pdata->reg;



	entry_count = readl_relaxed(reg + offsetof(struct ddr_stats_data,

				    entry_count));
@@ -172,7 +161,6 @@ static ssize_t ddr_stats_show(struct kobject *kobj, 
	}



	length = ddr_stats_copy_stats(buf, PAGE_SIZE, reg, entry_count);

	iounmap(reg);



	return length;

}
@@ -212,13 +200,14 @@ static int ddr_stats_create_sysfs(struct platform_device *pdev, 


static int ddr_stats_probe(struct platform_device *pdev)

{

	struct ddr_stats_platform_data *pdata;

	struct resource *res = NULL, *offset = NULL;

	u32 offset_addr = 0;

	void __iomem *phys_ptr = NULL;

	phys_addr_t phys_addr_base;

	u32 phys_size, key;



	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);

	if (!pdata)

	ddr_pdata = devm_kzalloc(&pdev->dev, sizeof(*ddr_pdata), GFP_KERNEL);

	if (!ddr_pdata)

		return -ENOMEM;



	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
@@ -242,10 +231,23 @@ static int ddr_stats_probe(struct platform_device *pdev) 
	if (!offset_addr)

		return -ENODEV;



	pdata->phys_addr_base  = res->start + offset_addr;

	pdata->phys_size = resource_size(res);

	phys_addr_base = res->start + offset_addr;

	phys_size = resource_size(res);



	ddr_pdata->reg = devm_ioremap(&pdev->dev, phys_addr_base, phys_size);

	if (!ddr_pdata->reg) {

		pr_err("ERROR could not ioremap start=%pa, len=%u\n",

		       phys_addr_base, phys_size);

		return -ENODEV;

	}



	key = readl_relaxed(ddr_pdata->reg + offsetof(struct ddr_stats_data, key));

	if (key != MAGIC_KEY1) {

		pr_err("Invalid key\n");

		return -EINVAL;

	}



	return ddr_stats_create_sysfs(pdev, pdata);

	return ddr_stats_create_sysfs(pdev, ddr_pdata);

}



static int ddr_stats_remove(struct platform_device *pdev)