Merge "Revert "disp: msm: add func to parse pll_codes from dfps_data_region""...

#include <linux/err.h>

#include <linux/delay.h>

#include <linux/iopoll.h>

#include <linux/vmalloc.h>

#include <linux/io.h>

#include <linux/of_address.h>

#include "dsi_pll.h"

static int dsi_pll_clock_register(struct platform_device *pdev,

	return rc;

}

static void dsi_pll_free_bootmem(u32 mem_addr, u32 size)

{

	unsigned long pfn_start, pfn_end, pfn_idx;

	pfn_start = mem_addr >> PAGE_SHIFT;

	pfn_end = (mem_addr + size) >> PAGE_SHIFT;

	for (pfn_idx = pfn_start; pfn_idx < pfn_end; pfn_idx++)

		free_reserved_page(pfn_to_page(pfn_idx));

}

static void dsi_pll_parse_dfps(struct platform_device *pdev,

				struct dsi_pll_resource *pll_res)

{

	struct device_node *pnode = NULL;

	const u32 *addr;

	struct vm_struct *area = NULL;

	u64 size;

	u32 offsets[2];

	unsigned long virt_add = 0;

	pnode = of_parse_phandle(pdev->dev.of_node, "memory-region", 0);

	if (IS_ERR_OR_NULL(pnode)) {

		DSI_PLL_INFO(pll_res, "of_parse_phandle failed\n");

		goto node_err;

	}

	addr = of_get_address(pnode, 0, &size, NULL);

	if (!addr) {

		DSI_PLL_ERR(pll_res,

			"failed to parse the dfps memory address\n");

		goto node_err;

	}

	/* maintain compatibility for 32/64 bit */

	offsets[0] = (u32) of_read_ulong(addr, 2);

	offsets[1] = (u32) size;

	area = get_vm_area(offsets[1], VM_IOREMAP);

	if (!area) {

		DSI_PLL_ERR(pll_res, "get_vm_area failed\n");

		goto mem_err;

	}

	virt_add = (unsigned long)area->addr;

	if (ioremap_page_range(virt_add, (virt_add + offsets[1]),

			offsets[0], PAGE_KERNEL)) {

		DSI_PLL_ERR(pll_res, "ioremap_page_range failed\n");

		goto mem_err;

	}

	pll_res->dfps = kzalloc(sizeof(struct dfps_info), GFP_KERNEL);

	if (IS_ERR_OR_NULL(pll_res->dfps)) {

		DSI_PLL_ERR(pll_res, "pll_res->dfps allocate failed\n");

		goto mem_err;

	}

	/* memcopy complete dfps structure from kernel virtual memory */

	memcpy_fromio(pll_res->dfps, area->addr, sizeof(struct dfps_info));

mem_err:

	if (virt_add)

		unmap_kernel_range(virt_add, (unsigned long) size);

	if (area)

		vfree(area->addr);

	/* free the dfps memory here */

	dsi_pll_free_bootmem(offsets[0], offsets[1]);

node_err:

	if (pnode)

		of_node_put(pnode);

}

int dsi_pll_init(struct platform_device *pdev, struct dsi_pll_resource **pll)

{

	int rc = 0;

		return -EINVAL;

	}

	if (!(pll_res->index))

		dsi_pll_parse_dfps(pdev, pll_res);

	return rc;

}