linux-kernel - Re: [PATCH v2 1/2] mmc: sdhci-pci-gli: GL9755: Support for CD/WP inversion on OF platforms

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <f24f9807-e960-3d85-2040-700796a46f97@marcan.st>
Date:   Thu, 16 Dec 2021 00:58:05 +0900
From:   Hector Martin <marcan@...can.st>
To:     Robin Murphy <robin.murphy@....com>,
        Ben Chuang <benchuanggli@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Sven Peter <sven@...npeter.dev>, Marc Zyngier <maz@...nel.org>,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 1/2] mmc: sdhci-pci-gli: GL9755: Support for CD/WP
 inversion on OF platforms

On 13/12/2021 20.45, Robin Murphy wrote:
> On 2021-12-12 07:02, Hector Martin wrote:
>> This is required on some Apple ARM64 laptops using this controller.
>> As is typical on DT platforms, pull these quirks from the device tree
>> using the standard mmc bindings.
>>
>> See Documentation/devicetree/bindings/mmc/mmc-controller.yaml
>>
>> Signed-off-by: Hector Martin <marcan@...can.st>
>> ---
>>   drivers/mmc/host/sdhci-pci-gli.c | 19 +++++++++++++++++--
>>   1 file changed, 17 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
>> index 4fd99c1e82ba..ad742743a494 100644
>> --- a/drivers/mmc/host/sdhci-pci-gli.c
>> +++ b/drivers/mmc/host/sdhci-pci-gli.c
>> @@ -12,6 +12,7 @@
>>   #include <linux/pci.h>
>>   #include <linux/mmc/mmc.h>
>>   #include <linux/delay.h>
>> +#include <linux/of.h>
>>   #include "sdhci.h"
>>   #include "sdhci-pci.h"
>>   #include "cqhci.h"
>> @@ -114,8 +115,10 @@
>>   #define   GLI_9755_WT_EN_OFF    0x0
>>   
>>   #define PCI_GLI_9755_PECONF   0x44
>> -#define   PCI_GLI_9755_LFCLK    GENMASK(14, 12)
>> -#define   PCI_GLI_9755_DMACLK   BIT(29)
>> +#define   PCI_GLI_9755_LFCLK          GENMASK(14, 12)
>> +#define   PCI_GLI_9755_DMACLK         BIT(29)
>> +#define   PCI_GLI_9755_INVERT_CD      BIT(30)
>> +#define   PCI_GLI_9755_INVERT_WP      BIT(31)
>>   
>>   #define PCI_GLI_9755_CFG2          0x48
>>   #define   PCI_GLI_9755_CFG2_L1DLY    GENMASK(28, 24)
>> @@ -570,6 +573,18 @@ static void gl9755_hw_setting(struct sdhci_pci_slot *slot)
>>   	gl9755_wt_on(pdev);
>>   
>>   	pci_read_config_dword(pdev, PCI_GLI_9755_PECONF, &value);
>> +#ifdef CONFIG_OF
>> +	if (pdev->dev.of_node) {
> 
> FWIW, of_property_read_bool() should handle a NULL node correctly, and 
> its stub be optimised away for !OF, so you don't really need the 
> explicit check or the #ifdef.

Thanks, removed it for v3!

-- 
Hector Martin (marcan@...can.st)
Public Key: https://mrcn.st/pub