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Commit 58280e45 authored by Sharat Masetty's avatar Sharat Masetty
Browse files

msm: kgsl: Use nvmem to read the speed bin configuration 



This patch uses the nvmem driver framework in the kernel to
read the speed bin efuse from qfprom. This was previously
read using raw register reads of ioremapped qfprom area.

Change-Id: I463471d35c9d02ab8e3ac3f8d961b1058698d430
Signed-off-by: default avatarSharat Masetty <smasetty@codeaurora.org>
parent 5294afaf

drivers/gpu/msm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ config QCOM_KGSL 
	select FW_LOADER

	select PM_DEVFREQ

	select QCOM_SCM

	select NVMEM

	select DEVFREQ_GOV_SIMPLE_ONDEMAND

	select DEVFREQ_GOV_PERFORMANCE

	select DEVFREQ_GOV_QCOM_ADRENO_TZ

drivers/gpu/msm/adreno.c

+29 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include <linux/module.h>

#include <linux/msm_kgsl.h>

#include <linux/regulator/consumer.h>

#include <linux/nvmem-consumer.h>

#include <soc/qcom/scm.h>



#include "adreno.h"
@@ -1283,6 +1284,30 @@ static bool adreno_is_gpu_disabled(struct adreno_device *adreno_dev) 
			pte_row0_msb[1] ? true : false;

}



static int adreno_read_speed_bin(struct platform_device *pdev,

		struct adreno_device *adreno_dev)

{

	struct nvmem_cell *cell = nvmem_cell_get(&pdev->dev, "speed_bin");

	int ret = PTR_ERR_OR_ZERO(cell);



	if (ret) {

		/*

		 * If the cell isn't defined enabled, then revert to

		 * using the default bin

		 */

		if (ret == -ENOENT)

			return 0;



		return ret;

	}



	adreno_dev->speed_bin = *((unsigned int *) nvmem_cell_read(cell, NULL));



	nvmem_cell_put(cell);



	return 0;

}



static int adreno_probe(struct platform_device *pdev)

{

	const struct of_device_id *of_id =
@@ -1303,6 +1328,10 @@ static int adreno_probe(struct platform_device *pdev) 


	adreno_update_soc_hw_revision_quirks(adreno_dev, pdev);



	status = adreno_read_speed_bin(pdev, adreno_dev);

	if (status)

		return status;



	/* Get the chip ID from the DT and set up target specific parameters */

	if (adreno_identify_gpu(adreno_dev))

		return -ENODEV;