-----Original Message----- From: Bjorn Helgaas helgaas@kernel.org Sent: Tuesday, February 2, 2021 8:28 PM To: 吳昊澄 Ricky ricky_wu@realtek.com Cc: arnd@arndb.de; gregkh@linuxfoundation.org; yuehaibing@huawei.com; ulf.hansson@linaro.org; bhelgaas@google.com; linux-kernel@vger.kernel.org; stable@vger.kernel.org Subject: Re: [PATCH] misc: rtsx: modify rts522a init flow
The subject line could be more descriptive. All patches modify something, so the only real information it contains is "rts522a" and "init". Maybe it could say something about powering off OCP (whatever that is) when no memory card is present.
Ok, I will update the subject line at V2 "misc: rtsx: init of rts522a add power off OCP when no card is present"
On Tue, Feb 02, 2021 at 06:56:41PM +0800, ricky_wu@realtek.com wrote:
From: Ricky Wu ricky_wu@realtek.com
Power down OCP for power consumption when card is not exist at init_hw()
I assume "card is not exist" means "no SD/MMC card is present".
Right, it's that means, I will modify this description at V2
Why do you only do this for 5227? "card_exist" seems to be a generic concept (it's in struct rtsx_pcr and set by the generic rtsx_pci_init_hw()). Could/should this be done for other card readers as well?
Only rts522a need to do this, other card readers can do HW auto power down
Cc: stable@vger.kernel.org
Per https://www.kernel.org/doc/html/v5.10/process/stable-kernel-rules.html (option 1) this is sufficient. You should not include stable@kernel.org in the cc: list above.
I am not very clear, I want this patch to Stable tree, so I added this Tag(Cc: stable@vger.kernel.org) If I remove this Tag, it means this patch not go to Stable Tree?
Ricky
Signed-off-by: Ricky Wu ricky_wu@realtek.com
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
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