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From 9ceb22fbffbad710db2c91ed32e4e73503f13301 Mon Sep 17 00:00:00 2001
From: Peter Robinson <pbrobinson@gmail.com>
Date: Tue, 25 Jun 2019 19:12:10 +0100
Subject: [PATCH] scsi: ufs-qcom: Add support for platforms booting ACPI
New Qualcomm AArch64 based laptops are now available which use UFS
as their primary data storage medium. These devices are supplied
with ACPI support out of the box. This patch ensures the Qualcomm
UFS driver will be bound when the "QCOM24A5" H/W device is
advertised as present.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
---
drivers/scsi/ufs/ufs-qcom.c | 23 ++++++++++++++++++++---
1 file changed, 20 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index b4d1b5c22987..ee4b1da1e223 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -3,6 +3,7 @@
* Copyright (c) 2013-2016, Linux Foundation. All rights reserved.
*/
+#include <linux/acpi.h>
#include <linux/time.h>
#include <linux/of.h>
#include <linux/platform_device.h>
@@ -161,6 +162,9 @@ static int ufs_qcom_init_lane_clks(struct ufs_qcom_host *host)
int err = 0;
struct device *dev = host->hba->dev;
+ if (has_acpi_companion(dev))
+ return 0;
+
err = ufs_qcom_host_clk_get(dev, "rx_lane0_sync_clk",
&host->rx_l0_sync_clk, false);
if (err)
@@ -1127,9 +1131,13 @@ static int ufs_qcom_init(struct ufs_hba *hba)
__func__, err);
goto out_variant_clear;
} else if (IS_ERR(host->generic_phy)) {
- err = PTR_ERR(host->generic_phy);
- dev_err(dev, "%s: PHY get failed %d\n", __func__, err);
- goto out_variant_clear;
+ if (has_acpi_companion(dev)) {
+ host->generic_phy = NULL;
+ } else {
+ err = PTR_ERR(host->generic_phy);
+ dev_err(dev, "%s: PHY get failed %d\n", __func__, err);
+ goto out_variant_clear;
+ }
}
err = ufs_qcom_bus_register(host);
@@ -1599,6 +1607,14 @@ static const struct of_device_id ufs_qcom_of_match[] = {
};
MODULE_DEVICE_TABLE(of, ufs_qcom_of_match);
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id ufs_qcom_acpi_match[] = {
+ { "QCOM24A5" },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, ufs_qcom_acpi_match);
+#endif
+
static const struct dev_pm_ops ufs_qcom_pm_ops = {
.suspend = ufshcd_pltfrm_suspend,
.resume = ufshcd_pltfrm_resume,
@@ -1615,6 +1631,7 @@ static struct platform_driver ufs_qcom_pltform = {
.name = "ufshcd-qcom",
.pm = &ufs_qcom_pm_ops,
.of_match_table = of_match_ptr(ufs_qcom_of_match),
+ .acpi_match_table = ACPI_PTR(ufs_qcom_acpi_match),
},
};
module_platform_driver(ufs_qcom_pltform);
--
2.21.0
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