linux-kernel - [PATCH v2] ufs: qcom: drop custom Android boot parameters

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Message-Id: <20220321151853.24138-1-krzk@kernel.org>
Date:   Mon, 21 Mar 2022 16:18:53 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-arm-msm@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzk@...nel.org>,
        Amit Pundir <amit.pundir@...aro.org>,
        Luca Weiss <luca.weiss@...rphone.com>,
        Brian Masney <bmasney@...hat.com>
Subject: [PATCH v2] ufs: qcom: drop custom Android boot parameters

The QCOM UFS driver requires an androidboot.bootdevice command line
argument matching the UFS device name.  If the name is different, it
refuses to probe.  This androidboot.bootdevice is provided by
stock/vendor (from an Android-based device) bootloader.

This does not make sense from Linux point of view.  Driver should be
able to boot regardless of bootloader.  Driver should not depend on some
Android custom environment data.

Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Tested-by: Amit Pundir <amit.pundir@...aro.org>
Tested-by: Luca Weiss <luca.weiss@...rphone.com>
Reviewed-by: Brian Masney <bmasney@...hat.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

---

Changes since v1
1. Fix commit msg typo (Alim).
2. Add tags.

See also:
https://lore.kernel.org/linux-devicetree/f61abc2b-3ce8-7b1f-3d28-8a4a03ec58eb@kernel.org/T/#u
---
 drivers/scsi/ufs/ufs-qcom.c | 15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 0d2e950d0865..586c0e567ff9 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -957,18 +957,6 @@ static const struct reset_control_ops ufs_qcom_reset_ops = {
 	.deassert = ufs_qcom_reset_deassert,
 };
 
-#define	ANDROID_BOOT_DEV_MAX	30
-static char android_boot_dev[ANDROID_BOOT_DEV_MAX];
-
-#ifndef MODULE
-static int __init get_android_boot_dev(char *str)
-{
-	strlcpy(android_boot_dev, str, ANDROID_BOOT_DEV_MAX);
-	return 1;
-}
-__setup("androidboot.bootdevice=", get_android_boot_dev);
-#endif
-
 /**
  * ufs_qcom_init - bind phy with controller
  * @hba: host controller instance
@@ -988,9 +976,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
 	struct resource *res;
 	struct ufs_clk_info *clki;
 
-	if (strlen(android_boot_dev) && strcmp(android_boot_dev, dev_name(dev)))
-		return -ENODEV;
-
 	host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
 	if (!host) {
 		err = -ENOMEM;
-- 
2.32.0