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Merge "ufs: ufs-qcom: configure UFS mode based on UFS device version"

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qctecmdr 2023-10-31 05:26:08 -07:00 committed by Gerrit - the friendly Code Review server
commit 80375855c2
1 changed files with 36 additions and 0 deletions
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36
drivers/ufs/host/ufs-qcom.c
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@ -3576,6 +3576,39 @@ static void ufs_qcom_parse_broken_ahit_workaround_flag(struct ufs_qcom_host *hos
host->broken_ahit_wa = of_property_read_bool(np, str);
}
static void ufs_qcom_set_rate_a(struct ufs_qcom_host *host)
{
size_t len;
u8 *data;
struct nvmem_cell *nvmem_cell;
nvmem_cell = nvmem_cell_get(host->hba->dev, "ufs_dev");
if (IS_ERR(nvmem_cell)) {
dev_err(host->hba->dev, "(%s) Failed to get nvmem cell\n", __func__);
return;
}
data = (u8 *)nvmem_cell_read(nvmem_cell, &len);
if (IS_ERR(data)) {
dev_err(host->hba->dev, "(%s) Failed to read from nvmem\n", __func__);
goto cell_put;
}
/*
* data equal to zero shows that ufs 2.x card is connected while
* non-zero value shows that ufs 3.x card is connected
*/
if (*data) {
host->limit_rate = PA_HS_MODE_A;
dev_dbg(host->hba->dev, "UFS 3.x device is detected, Mode is set to RATE A\n");
}
kfree(data);
cell_put:
nvmem_cell_put(nvmem_cell);
}
/**
* ufs_qcom_init - bind phy with controller
* @hba: host controller instance
@ -4745,6 +4778,9 @@ static void ufs_qcom_parse_limits(struct ufs_qcom_host *host)
of_property_read_u32(np, "limit-rx-pwm-gear", &host->limit_rx_pwm_gear);
of_property_read_u32(np, "limit-rate", &host->limit_rate);
of_property_read_u32(np, "limit-phy-submode", &host->limit_phy_submode);
if (of_property_read_bool(np, "limit-rate-ufs3"))
ufs_qcom_set_rate_a(host);
}
/*