misc: rtsx: init of rts522a add OCP power off when no card is present

commit 920fd8a70619074eac7687352c8f1c6f3c2a64a5 upstream.

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>
Link: https://lore.kernel.org/r/20210204083115.9471-1-ricky_wu@realtek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/cardreader/rts5227.c b/drivers/misc/cardreader/rts5227.c
index 8859011..8200af2 100644 (file)
--- 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);