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Wed, 04 Mar 2020 20:10:33 -0800 Received: from MTKMBS02N2.mediatek.inc (172.21.101.101) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 4 Mar 2020 20:08:02 -0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs02n2.mediatek.inc (172.21.101.101) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 5 Mar 2020 12:04:24 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 5 Mar 2020 12:06:20 +0800 From: Stanley Chu To: , , , , Subject: [PATCH v1 3/4] scsi: ufs: allow customized delay for host enabling Date: Thu, 5 Mar 2020 12:07:03 +0800 Message-ID: <20200305040704.10645-4-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200305040704.10645-1-stanley.chu@mediatek.com> References: <20200305040704.10645-1-stanley.chu@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: BA07B504F3F26FF626B890E43A8DA3B6510C5A53DA0DDB0E5AC4B1F78667188A2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200304_201037_833343_E792673B X-CRM114-Status: GOOD ( 10.69 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stanley Chu , bvanassche@acm.org, andy.teng@mediatek.com, chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com, linux-kernel@vger.kernel.org, cang@codeaurora.org, linux-mediatek@lists.infradead.org, peter.wang@mediatek.com, matthias.bgg@gmail.com, beanhuo@micron.com, linux-arm-kernel@lists.infradead.org, asutoshd@codeaurora.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Currently a 1 ms delay is applied before polling CONTROLLER_ENABLE bit. This delay may not be required or can be changed in different controllers. Make the delay as a changeable value in struct ufs_hba to allow it customized by vendors. Signed-off-by: Stanley Chu --- drivers/scsi/ufs/ufshcd.c | 6 +++++- drivers/scsi/ufs/ufshcd.h | 1 + 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index ed61ecb98b2d..39cae907abd0 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4282,7 +4282,10 @@ int ufshcd_hba_enable(struct ufs_hba *hba) * instruction might be read back. * This delay can be changed based on the controller. */ - usleep_range(1000, 1100); + if (hba->hba_enable_delay_us) { + usleep_range(hba->hba_enable_delay_us, + hba->hba_enable_delay_us + 100); + } /* wait for the host controller to complete initialization */ retry = 10; @@ -8402,6 +8405,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) hba->mmio_base = mmio_base; hba->irq = irq; + hba->hba_enable_delay_us = 1000; err = ufshcd_hba_init(hba); if (err) diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 49ade1bfd085..baf1143d4839 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -662,6 +662,7 @@ struct ufs_hba { u32 eh_flags; u32 intr_mask; u16 ee_ctrl_mask; + u16 hba_enable_delay_us; bool is_powered; /* Work Queues */ -- 2.18.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel