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Commit df095ced authored by Anirudh Ghayal's avatar Anirudh Ghayal Committed by Gerrit - the friendly Code Review server
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regulator: msm-gfx-ldo: Add LDO initial configuration 



Add LDO initial configuration for msmtitanium.

CRs-Fixed: 975536
Change-Id: If3dea4c4422a1b11b4922b95a99c5e2fe3418a26
Signed-off-by: default avatarAnirudh Ghayal <aghayal@codeaurora.org>
parent b535d63d

drivers/regulator/msm_gfx_ldo.c

+30 −11
Original line number Diff line number Diff line
@@ -28,6 +28,11 @@ 
#include <linux/slab.h>

#include <linux/uaccess.h>



#define LDO_ATEST_REG			0x0

#define LDO_CFG0_REG			0x4

#define LDO_CFG1_REG			0x8

#define LDO_CFG2_REG			0xC



#define LDO_VREF_TEST_CFG		0x14

#define ENABLE_LDO_STATUS_BIT		(BIT(8) | BIT(12))

#define LDO_AUTOBYPASS_BIT		BIT(20)
@@ -89,6 +94,11 @@ struct fuse_param { 
	unsigned		bit_end;

};



struct ldo_config {

	u32 offset;

	u32 value;

};



struct msm_gfx_ldo {

	struct device		*dev;

	struct regulator_desc	rdesc;
@@ -111,6 +121,7 @@ struct msm_gfx_ldo { 
	const struct fuse_param	**init_volt_param;

	bool			ldo_enable;

	bool			ldo_bypass_fuse_enable;

	struct ldo_config	*ldo_init_config;



	void __iomem		*efuse_base;

	phys_addr_t		efuse_addr;
@@ -125,6 +136,15 @@ struct msm_gfx_ldo { 
};



#define MSMTITANIUM_LDO_FUSE_CORNERS		3

#define LDO_MAX_OFFSET				0xFFFF

static struct ldo_config msmtitanium_ldo_config[] = {

	{LDO_ATEST_REG,		0x00000203},

	{LDO_CFG0_REG,		0x05008600},

	{LDO_CFG1_REG,		       0x0},

	{LDO_CFG2_REG,		0x0000C3FC},

	{LDO_VREF_TEST_CFG,	0x004B1102},

	{LDO_MAX_OFFSET,	LDO_MAX_OFFSET},

};



static struct fuse_param msmtitanium_ldo_enable_param[] = {

	{65, 10, 10},
@@ -888,7 +908,7 @@ static int msm_gfx_ldo_init(struct platform_device *pdev, 
{

	struct resource *res;

	u32 len, ctl;

	int rc;

	int rc, i = 0;



	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ldo_addr");

	if (!res || !res->start) {
@@ -920,16 +940,14 @@ static int msm_gfx_ldo_init(struct platform_device *pdev, 
	ctl &= ~LDO_CLAMP_IO_BIT;

	writel_relaxed(ctl, ldo_vreg->ldo_base + PWRSWITCH_CTRL_REG);



	/* enable ldo status routing */

	ctl = readl_relaxed(ldo_vreg->ldo_base + LDO_VREF_TEST_CFG);

	ctl |= ENABLE_LDO_STATUS_BIT;

	writel_relaxed(ctl, ldo_vreg->ldo_base + LDO_VREF_TEST_CFG);



	/* enable auto-bypass */

	ctl = readl_relaxed(ldo_vreg->ldo_base + LDO_VREF_TEST_CFG);

	ctl |= LDO_AUTOBYPASS_BIT;

	writel_relaxed(ctl, ldo_vreg->ldo_base + LDO_VREF_TEST_CFG);



	i = 0;

	while (ldo_vreg->ldo_init_config &&

			ldo_vreg->ldo_init_config[i].offset != LDO_MAX_OFFSET) {

		writel_relaxed(ldo_vreg->ldo_init_config[i].value,

				ldo_vreg->ldo_base +

				ldo_vreg->ldo_init_config[i].offset);

		i++;

	}

	/* complete the writes */

	mb();
@@ -1056,6 +1074,7 @@ static int msm_gfx_ldo_target_init(struct msm_gfx_ldo *ldo_vreg) 
		ldo_vreg->init_volt_param[i] =

				msmtitanium_init_voltage_param[i];



	ldo_vreg->ldo_init_config = msmtitanium_ldo_config;

	ldo_vreg->ref_volt = msmtitanium_fuse_ref_volt;

	ldo_vreg->ldo_enable_param = msmtitanium_ldo_enable_param;

	ldo_vreg->ldo_bypass_fuse_enable = true;