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From: <ricky_wu@realtek.com>
To: <arnd@arndb.de>, <gregkh@linuxfoundation.org>,
	<ricky_wu@realtek.com>, <yuehaibing@huawei.com>,
	<ulf.hansson@linaro.org>, <bhelgaas@google.com>,
	<linux-kernel@vger.kernel.org>
Cc: <stable@vger.kernel.org>
Subject: [PATCH v2] misc: rtsx: init of rts522a add OCP power off when no card is present
Date: Thu, 4 Feb 2021 16:31:15 +0800	[thread overview]
Message-ID: <20210204083115.9471-1-ricky_wu@realtek.com> (raw)

From: Ricky Wu <ricky_wu@realtek.com>

Power down OCP for power consumption
when no SD/MMC card is present

Cc: stable@vger.kernel.org
Signed-off-by: Ricky Wu <ricky_wu@realtek.com>
---

v2: update the subject line and description
---
 drivers/misc/cardreader/rts5227.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/misc/cardreader/rts5227.c b/drivers/misc/cardreader/rts5227.c
index 8859011672cb..8200af22b529 100644
--- a/drivers/misc/cardreader/rts5227.c
+++ b/drivers/misc/cardreader/rts5227.c
@@ -398,6 +398,11 @@ static int rts522a_extra_init_hw(struct rtsx_pcr *pcr)
 {
 	rts5227_extra_init_hw(pcr);
 
+	/* Power down OCP for power consumption */
+	if (!pcr->card_exist)
+		rtsx_pci_write_register(pcr, FPDCTL, OC_POWER_DOWN,
+				OC_POWER_DOWN);
+
 	rtsx_pci_write_register(pcr, FUNC_FORCE_CTL, FUNC_FORCE_UPME_XMT_DBG,
 		FUNC_FORCE_UPME_XMT_DBG);
 	rtsx_pci_write_register(pcr, PCLK_CTL, 0x04, 0x04);
-- 
2.17.1


             reply	other threads:[~2021-02-04  8:32 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-04  8:31 ricky_wu [this message]
2021-06-04  7:25 [PATCH v2] misc: rtsx: init of rts522a add OCP power off when no card is present ricky_wu
2021-06-04  8:23 ` Greg KH

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