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Date: Thu, 12 Mar 2020 19:09:06 +0800 From: Stanley Chu <stanley.chu@...iatek.com> To: <linux-scsi@...r.kernel.org>, <martin.petersen@...cle.com>, <avri.altman@....com>, <alim.akhtar@...sung.com>, <jejb@...ux.ibm.com> CC: <beanhuo@...ron.com>, <asutoshd@...eaurora.org>, <cang@...eaurora.org>, <matthias.bgg@...il.com>, <bvanassche@....org>, <linux-mediatek@...ts.infradead.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <kuohong.wang@...iatek.com>, <peter.wang@...iatek.com>, <chun-hung.wu@...iatek.com>, <andy.teng@...iatek.com>, Stanley Chu <stanley.chu@...iatek.com> Subject: [PATCH v2 6/8] scsi: ufs: allow customized delay for host enabling 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 <stanley.chu@...iatek.com> Reviewed-by: Can Guo <cang@...eaurora.org> --- drivers/scsi/ufs/ufshcd.c | 3 ++- drivers/scsi/ufs/ufshcd.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index ce65d321a73f..dcbf45d547d8 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4298,7 +4298,7 @@ int ufshcd_hba_enable(struct ufs_hba *hba) * instruction might be read back. * This delay can be changed based on the controller. */ - ufshcd_wait_us(1000, 100, true); + ufshcd_wait_us(hba->hba_enable_delay_us, 100, true); /* wait for the host controller to complete initialization */ retry = 10; @@ -8418,6 +8418,7 @@ 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 4683e7bf6640..269ddb92bb55 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -653,6 +653,7 @@ 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
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