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soc: mediatek: pwrap: add pwrap_read32 for reading in 32-bit mode 

Some regulators such as MediaTek MT6380 has to be read in 32-bit mode.
So the patch adds pwrap_read32, rename old pwrap_read into pwrap_read16
and one function pointer is introduced for increasing flexibility allowing
the determination which mode is used by the pwrap slave detection through
device tree.

Signed-off-by: Chenglin Xu <chenglin.xu@mediatek.com>
Signed-off-by: Chen Zhong <chen.zhong@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Sean Wang 2017-10-18 16:28:43 +08:00 committed by Matthias Brugger
parent c77d3b8d0c
commit ec83368635
1 changed files with 54 additions and 1 deletions
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55
drivers/soc/mediatek/mtk-pmic-wrap.c
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@ -487,6 +487,7 @@ static int mt8135_regs[] = {
enum pmic_type {
PMIC_MT6323,
PMIC_MT6380,
PMIC_MT6397,
};
@ -496,9 +497,16 @@ enum pwrap_type {
PWRAP_MT8173,
};
struct pmic_wrapper;
struct pwrap_slv_type {
const u32 *dew_regs;
enum pmic_type type;
/*
* pwrap operations are highly associated with the PMIC types,
* so the pointers added increases flexibility allowing determination
* which type is used by the detection through device tree.
*/
int (*pwrap_read)(struct pmic_wrapper *wrp, u32 adr, u32 *rdata);
};
struct pmic_wrapper {
@ -609,7 +617,7 @@ static int pwrap_write(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
return 0;
}
static int pwrap_read(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
{
int ret;
@ -632,6 +640,39 @@ static int pwrap_read(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
return 0;
}
static int pwrap_read32(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
{
int ret, msb;
*rdata = 0;
for (msb = 0; msb < 2; msb++) {
ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
if (ret) {
pwrap_leave_fsm_vldclr(wrp);
return ret;
}
pwrap_writel(wrp, ((msb << 30) | (adr << 16)),
PWRAP_WACS2_CMD);
ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_vldclr);
if (ret)
return ret;
*rdata += (PWRAP_GET_WACS_RDATA(pwrap_readl(wrp,
PWRAP_WACS2_RDATA)) << (16 * msb));
pwrap_writel(wrp, 1, PWRAP_WACS2_VLDCLR);
}
return 0;
}
static int pwrap_read(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
{
return wrp->slave->pwrap_read(wrp, adr, rdata);
}
static int pwrap_regmap_read(void *context, u32 adr, u32 *rdata)
{
return pwrap_read(context, adr, rdata);
@ -752,6 +793,8 @@ static int pwrap_mt2701_init_reg_clock(struct pmic_wrapper *wrp)
pwrap_writel(wrp, 0x2, PWRAP_CSLEXT_START);
pwrap_writel(wrp, 0x2, PWRAP_CSLEXT_END);
break;
default:
break;
}
return 0;
@ -815,6 +858,8 @@ static int pwrap_init_cipher(struct pmic_wrapper *wrp)
pwrap_write(wrp, wrp->slave->dew_regs[PWRAP_DEW_CIPHER_EN],
0x1);
break;
default:
break;
}
/* wait for cipher data ready@AP */
@ -1036,11 +1081,19 @@ static const struct regmap_config pwrap_regmap_config = {
static const struct pwrap_slv_type pmic_mt6323 = {
.dew_regs = mt6323_regs,
.type = PMIC_MT6323,
.pwrap_read = pwrap_read16,
};
static const struct pwrap_slv_type pmic_mt6380 = {
.dew_regs = NULL,
.type = PMIC_MT6380,
.pwrap_read = pwrap_read32,
};
static const struct pwrap_slv_type pmic_mt6397 = {
.dew_regs = mt6397_regs,
.type = PMIC_MT6397,
.pwrap_read = pwrap_read16,
};
static const struct of_device_id of_slave_match_tbl[] = {