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Merge "mmc: sdhci-msm: Update TLMM_NORTH_SPARE register as per vdd_px2 supply"

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qctecmdr 2021-06-30 01:37:48 -07:00 • committed by Gerrit - the friendly Code Review server
commit 00e600676f
1 changed files with 34 additions and 0 deletions
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34
drivers/mmc/host/sdhci-msm.c
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@ -21,6 +21,7 @@
#include <linux/of.h>
#include <linux/reset.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/qcom-pinctrl.h>
#include "sdhci-pltfm.h"
#include "cqhci.h"
@ -164,6 +165,10 @@
#define CQHCI_VENDOR_DIS_RST_ON_CQ_EN (0x3 << 13)
#define RCLK_TOGGLE BIT(2)
/* enum for writing to TLMM_NORTH_SPARE register as defined by pinctrl API */
#define TLMM_NORTH_SPARE 2
#define TLMM_NORTH_SPARE_CORE_IE BIT(15)
struct sdhci_msm_offset {
u32 core_hc_mode;
u32 core_mci_data_cnt;
@ -2226,6 +2231,7 @@ static int sdhci_msm_setup_vreg(struct sdhci_msm_host *msm_host,
struct sdhci_msm_vreg_data *curr_slot;
struct sdhci_msm_reg_data *vreg_table[2];
struct mmc_host *mmc = msm_host->mmc;
u32 val = 0;
curr_slot = msm_host->vreg_data;
if (!curr_slot) {
@ -2241,6 +2247,20 @@ static int sdhci_msm_setup_vreg(struct sdhci_msm_host *msm_host,
if (!enable && vreg_table[1]->is_always_on && !mmc->card)
vreg_table[1]->is_always_on = false;
if (!enable && !(mmc->caps & MMC_CAP_NONREMOVABLE)) {
/*
* Disable Receiver of the Pad to avoid crowbar currents
* when Pad power supplies are collapsed. Provide SW control
* on the core_ie of SDC2 Pads. SW write 1’b0
* into the bit 15 of register TLMM_NORTH_SPARE.
*/
val = msm_spare_read(TLMM_NORTH_SPARE);
val &= ~TLMM_NORTH_SPARE_CORE_IE;
msm_spare_write(TLMM_NORTH_SPARE, val);
}
for (i = 0; i < ARRAY_SIZE(vreg_table); i++) {
if (vreg_table[i]) {
if (enable)
@ -2251,6 +2271,20 @@ static int sdhci_msm_setup_vreg(struct sdhci_msm_host *msm_host,
goto out;
}
}
if (enable && !(mmc->caps & MMC_CAP_NONREMOVABLE)) {
/*
* Disable Receiver of the Pad to avoid crowbar currents
* when Pad power supplies are collapsed. Provide SW control
* on the core_ie of SDC2 Pads. SW write 1’b1
* into the bit 15 of register TLMM_NORTH_SPARE.
*/
val = msm_spare_read(TLMM_NORTH_SPARE);
val |= TLMM_NORTH_SPARE_CORE_IE;
msm_spare_write(TLMM_NORTH_SPARE, val);
}
out:
return ret;
}