* [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode
@ 2021-11-09 10:35 lakshmi.sowjanya.d
2021-11-09 10:35 ` [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE lakshmi.sowjanya.d
2021-11-29 16:56 ` [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode Wolfram Sang
0 siblings, 2 replies; 15+ messages in thread
From: lakshmi.sowjanya.d @ 2021-11-09 10:35 UTC (permalink / raw)
To: linux-i2c
Cc: linux-kernel, wsa, jarkko.nikula, bala.senthil, pandith.n,
lakshmi.sowjanya.d
From: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
Add support to configure HCNT, LCNT values for Fast Mode Plus and High
Speed Mode.
Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
---
drivers/i2c/busses/i2c-designware-pcidrv.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index 0f409a4c2da0..174938fc7a7e 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -41,8 +41,12 @@ enum dw_pci_ctl_id_t {
struct dw_scl_sda_cfg {
u32 ss_hcnt;
u32 fs_hcnt;
+ u32 fp_hcnt;
+ u32 hs_hcnt;
u32 ss_lcnt;
u32 fs_lcnt;
+ u32 fp_lcnt;
+ u32 hs_lcnt;
u32 sda_hold;
};
@@ -306,8 +310,12 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
cfg = controller->scl_sda_cfg;
dev->ss_hcnt = cfg->ss_hcnt;
dev->fs_hcnt = cfg->fs_hcnt;
+ dev->fp_hcnt = cfg->fp_hcnt;
+ dev->hs_hcnt = cfg->hs_hcnt;
dev->ss_lcnt = cfg->ss_lcnt;
dev->fs_lcnt = cfg->fs_lcnt;
+ dev->fp_lcnt = cfg->fp_lcnt;
+ dev->hs_lcnt = cfg->hs_lcnt;
dev->sda_hold_time = cfg->sda_hold;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE
2021-11-09 10:35 [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode lakshmi.sowjanya.d
@ 2021-11-09 10:35 ` lakshmi.sowjanya.d
2021-11-09 12:59 ` Jarkko Nikula
2021-11-29 16:57 ` Wolfram Sang
2021-11-29 16:56 ` [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode Wolfram Sang
1 sibling, 2 replies; 15+ messages in thread
From: lakshmi.sowjanya.d @ 2021-11-09 10:35 UTC (permalink / raw)
To: linux-i2c
Cc: linux-kernel, wsa, jarkko.nikula, bala.senthil, pandith.n,
lakshmi.sowjanya.d
From: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
Set optimal HCNT, LCNT and hold time values for all the speeds supported
in Intel Programmable Service Engine I2C controller in Intel Elkhart
Lake.
Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
---
drivers/i2c/busses/i2c-designware-pcidrv.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index 174938fc7a7e..3418148f8bb5 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -84,6 +84,19 @@ static struct dw_scl_sda_cfg hsw_config = {
.sda_hold = 0x9,
};
+/* Elkhart Lake HCNT/LCNT/SDA hold time */
+static struct dw_scl_sda_cfg ehl_config = {
+ .ss_hcnt = 0x190,
+ .fs_hcnt = 0x4E,
+ .fp_hcnt = 0x1A,
+ .hs_hcnt = 0x1F,
+ .ss_lcnt = 0x1d6,
+ .fs_lcnt = 0x96,
+ .fp_lcnt = 0x32,
+ .hs_lcnt = 0x36,
+ .sda_hold = 0x1E,
+};
+
/* NAVI-AMD HCNT/LCNT/SDA hold time */
static struct dw_scl_sda_cfg navi_amd_config = {
.ss_hcnt = 0x1ae,
@@ -200,6 +213,7 @@ static struct dw_pci_controller dw_pci_controllers[] = {
},
[elkhartlake] = {
.bus_num = -1,
+ .scl_sda_cfg = &ehl_config,
.get_clk_rate_khz = ehl_get_clk_rate_khz,
},
[navi_amd] = {
--
2.17.1
^ permalink raw reply related [flat|nested] 15+ messages in thread
* Re: [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE
2021-11-09 10:35 ` [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE lakshmi.sowjanya.d
@ 2021-11-09 12:59 ` Jarkko Nikula
2021-11-29 17:00 ` Wolfram Sang
2021-11-29 16:57 ` Wolfram Sang
1 sibling, 1 reply; 15+ messages in thread
From: Jarkko Nikula @ 2021-11-09 12:59 UTC (permalink / raw)
To: lakshmi.sowjanya.d, linux-i2c; +Cc: linux-kernel, wsa, bala.senthil, pandith.n
On 11/9/21 12:35 PM, lakshmi.sowjanya.d@intel.com wrote:
> From: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
>
> Set optimal HCNT, LCNT and hold time values for all the speeds supported
> in Intel Programmable Service Engine I2C controller in Intel Elkhart
> Lake.
>
> Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
> ---
> drivers/i2c/busses/i2c-designware-pcidrv.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
To both:
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode
2021-11-09 10:35 [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode lakshmi.sowjanya.d
2021-11-09 10:35 ` [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE lakshmi.sowjanya.d
@ 2021-11-29 16:56 ` Wolfram Sang
2021-11-30 7:51 ` Jarkko Nikula
1 sibling, 1 reply; 15+ messages in thread
From: Wolfram Sang @ 2021-11-29 16:56 UTC (permalink / raw)
To: lakshmi.sowjanya.d
Cc: linux-i2c, linux-kernel, jarkko.nikula, bala.senthil, pandith.n
[-- Attachment #1: Type: text/plain, Size: 624 bytes --]
On Tue, Nov 09, 2021 at 04:05:51PM +0530, lakshmi.sowjanya.d@intel.com wrote:
> From: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
>
> Add support to configure HCNT, LCNT values for Fast Mode Plus and High
> Speed Mode.
>
> Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
Applied to for-next, thanks!
> + u32 fp_lcnt;
> + u32 hs_lcnt;
> u32 sda_hold;
Short question unrelated to this patch. Why are all these u32...
> dev->ss_hcnt = cfg->ss_hcnt;
> dev->fs_hcnt = cfg->fs_hcnt;
... and the ones in dev are u16? Wouldn't it be easier if they all had
the same type?
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE
2021-11-09 10:35 ` [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE lakshmi.sowjanya.d
2021-11-09 12:59 ` Jarkko Nikula
@ 2021-11-29 16:57 ` Wolfram Sang
2021-11-30 9:14 ` Andy Shevchenko
1 sibling, 1 reply; 15+ messages in thread
From: Wolfram Sang @ 2021-11-29 16:57 UTC (permalink / raw)
To: lakshmi.sowjanya.d
Cc: linux-i2c, linux-kernel, jarkko.nikula, bala.senthil, pandith.n
[-- Attachment #1: Type: text/plain, Size: 405 bytes --]
On Tue, Nov 09, 2021 at 04:05:52PM +0530, lakshmi.sowjanya.d@intel.com wrote:
> From: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
>
> Set optimal HCNT, LCNT and hold time values for all the speeds supported
> in Intel Programmable Service Engine I2C controller in Intel Elkhart
> Lake.
>
> Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
Applied to for-next, thanks!
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE
2021-11-09 12:59 ` Jarkko Nikula
@ 2021-11-29 17:00 ` Wolfram Sang
0 siblings, 0 replies; 15+ messages in thread
From: Wolfram Sang @ 2021-11-29 17:00 UTC (permalink / raw)
To: Jarkko Nikula
Cc: lakshmi.sowjanya.d, linux-i2c, linux-kernel, bala.senthil, pandith.n
[-- Attachment #1: Type: text/plain, Size: 245 bytes --]
Hi Jarkko,
> To both:
If it is not causing too much trouble for you, I'd appreciate if you
could ack patches separately. This gives me a better overview in
patchwork which series are completely checked.
Thanks and happy hacking,
Wolfram
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode
2021-11-29 16:56 ` [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode Wolfram Sang
@ 2021-11-30 7:51 ` Jarkko Nikula
2021-12-01 5:51 ` D, Lakshmi Sowjanya
0 siblings, 1 reply; 15+ messages in thread
From: Jarkko Nikula @ 2021-11-30 7:51 UTC (permalink / raw)
To: Wolfram Sang, lakshmi.sowjanya.d, linux-i2c, linux-kernel,
bala.senthil, pandith.n
On 11/29/21 6:56 PM, Wolfram Sang wrote:
> On Tue, Nov 09, 2021 at 04:05:51PM +0530, lakshmi.sowjanya.d@intel.com wrote:
>> From: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
>>
>> Add support to configure HCNT, LCNT values for Fast Mode Plus and High
>> Speed Mode.
>>
>> Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
>
> Applied to for-next, thanks!
>
>> + u32 fp_lcnt;
>> + u32 hs_lcnt;
>> u32 sda_hold;
>
> Short question unrelated to this patch. Why are all these u32...
>
>> dev->ss_hcnt = cfg->ss_hcnt;
>> dev->fs_hcnt = cfg->fs_hcnt;
>
> ... and the ones in dev are u16? Wouldn't it be easier if they all had
> the same type?
>
True, only sda_hold(_time) is u32 and other timing parameters are u16.
Lakshmi: Would you like to send a patch fixing this and get more
contributions to the driver :-)
Originally this discrepancy was introduced 2014 by the commit
8efd1e9ee3bd ("i2c: designware-pci: set ideal HCNT, LCNT and SDA hold
time value").
Jarkko
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE
2021-11-29 16:57 ` Wolfram Sang
@ 2021-11-30 9:14 ` Andy Shevchenko
2021-11-30 15:49 ` Andy Shevchenko
0 siblings, 1 reply; 15+ messages in thread
From: Andy Shevchenko @ 2021-11-30 9:14 UTC (permalink / raw)
To: Wolfram Sang, lakshmi.sowjanya.d, linux-i2c, linux-kernel,
jarkko.nikula, bala.senthil, pandith.n
On Mon, Nov 29, 2021 at 05:57:03PM +0100, Wolfram Sang wrote:
> On Tue, Nov 09, 2021 at 04:05:52PM +0530, lakshmi.sowjanya.d@intel.com wrote:
> > From: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
> >
> > Set optimal HCNT, LCNT and hold time values for all the speeds supported
> > in Intel Programmable Service Engine I2C controller in Intel Elkhart
> > Lake.
> >
> > Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
>
> Applied to for-next, thanks!
Oh là là! Can we revert these, please?
After the commit 64d0a0755c7d ("i2c: designware: Read counters from ACPI for
PCI driver") the PCI driver should get this from ACPI tables, no hard coding
needed anymore. I did that series to address this very issue.
So, Lakshmi, please ask for BIOS fix as we discussed long time ago.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE
2021-11-30 9:14 ` Andy Shevchenko
@ 2021-11-30 15:49 ` Andy Shevchenko
2021-11-30 21:34 ` Wolfram Sang
0 siblings, 1 reply; 15+ messages in thread
From: Andy Shevchenko @ 2021-11-30 15:49 UTC (permalink / raw)
To: Wolfram Sang, lakshmi.sowjanya.d, linux-i2c, linux-kernel,
jarkko.nikula, bala.senthil, pandith.n
On Tue, Nov 30, 2021 at 11:14:57AM +0200, Andy Shevchenko wrote:
> On Mon, Nov 29, 2021 at 05:57:03PM +0100, Wolfram Sang wrote:
> > On Tue, Nov 09, 2021 at 04:05:52PM +0530, lakshmi.sowjanya.d@intel.com wrote:
> > > From: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
> > >
> > > Set optimal HCNT, LCNT and hold time values for all the speeds supported
> > > in Intel Programmable Service Engine I2C controller in Intel Elkhart
> > > Lake.
> > >
> > > Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
> >
> > Applied to for-next, thanks!
>
> Oh là là! Can we revert these, please?
>
> After the commit 64d0a0755c7d ("i2c: designware: Read counters from ACPI for
> PCI driver") the PCI driver should get this from ACPI tables, no hard coding
> needed anymore. I did that series to address this very issue.
>
> So, Lakshmi, please ask for BIOS fix as we discussed long time ago.
For the record, I have just checked the DSDT dump I have from
Elkhart Lake machine and BIOS provides those counters for devices
\_SB.PCI0.I2C0 .. \_SB.PCI0.I2C5 (6 devices altogether).
So, BIOS is quite aware of the interface and patches are not needed.
I rather add a comment there that these tables in the driver shouldn't
be spread and expanded anymore (at least by Intel).
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE
2021-11-30 15:49 ` Andy Shevchenko
@ 2021-11-30 21:34 ` Wolfram Sang
0 siblings, 0 replies; 15+ messages in thread
From: Wolfram Sang @ 2021-11-30 21:34 UTC (permalink / raw)
To: Andy Shevchenko
Cc: lakshmi.sowjanya.d, linux-i2c, linux-kernel, jarkko.nikula,
bala.senthil, pandith.n
[-- Attachment #1: Type: text/plain, Size: 286 bytes --]
> > > Applied to for-next, thanks!
> >
> > Oh là là! Can we revert these, please?
Okay, both reverted. Thanks for the heads up!
> I rather add a comment there that these tables in the driver shouldn't
> be spread and expanded anymore (at least by Intel).
Please do.
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 15+ messages in thread
* RE: [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode
2021-11-30 7:51 ` Jarkko Nikula
@ 2021-12-01 5:51 ` D, Lakshmi Sowjanya
2021-12-01 7:33 ` Jarkko Nikula
0 siblings, 1 reply; 15+ messages in thread
From: D, Lakshmi Sowjanya @ 2021-12-01 5:51 UTC (permalink / raw)
To: Jarkko Nikula, Wolfram Sang, linux-i2c, linux-kernel, Senthil,
Bala, N, Pandith
Cc: Saha, Tamal
>-----Original Message-----
>From: Jarkko Nikula <jarkko.nikula@linux.intel.com>
>Sent: Tuesday, November 30, 2021 1:22 PM
>To: Wolfram Sang <wsa@kernel.org>; D, Lakshmi Sowjanya
><lakshmi.sowjanya.d@intel.com>; linux-i2c@vger.kernel.org; linux-
>kernel@vger.kernel.org; Senthil, Bala <bala.senthil@intel.com>; N, Pandith
><pandith.n@intel.com>
>Subject: Re: [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode
>Plus and High Speed Mode
>
>On 11/29/21 6:56 PM, Wolfram Sang wrote:
>> On Tue, Nov 09, 2021 at 04:05:51PM +0530, lakshmi.sowjanya.d@intel.com
>wrote:
>>> From: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
>>>
>>> Add support to configure HCNT, LCNT values for Fast Mode Plus and
>>> High Speed Mode.
>>>
>>> Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
>>
>> Applied to for-next, thanks!
>>
>>> + u32 fp_lcnt;
>>> + u32 hs_lcnt;
>>> u32 sda_hold;
>>
>> Short question unrelated to this patch. Why are all these u32...
>>
>>> dev->ss_hcnt = cfg->ss_hcnt;
>>> dev->fs_hcnt = cfg->fs_hcnt;
>>
>> ... and the ones in dev are u16? Wouldn't it be easier if they all had
>> the same type?
>>
>True, only sda_hold(_time) is u32 and other timing parameters are u16.
>
>Lakshmi: Would you like to send a patch fixing this and get more contributions
>to the driver :-)
Thanks Wolfram and Jarkko,
Sure. I will send a patch fixing it.
Thanks,
Lakshmi
>
>Originally this discrepancy was introduced 2014 by the commit 8efd1e9ee3bd
>("i2c: designware-pci: set ideal HCNT, LCNT and SDA hold time value").
>
>Jarkko
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode
2021-12-01 5:51 ` D, Lakshmi Sowjanya
@ 2021-12-01 7:33 ` Jarkko Nikula
2021-12-01 8:36 ` Wolfram Sang
0 siblings, 1 reply; 15+ messages in thread
From: Jarkko Nikula @ 2021-12-01 7:33 UTC (permalink / raw)
To: D, Lakshmi Sowjanya, Wolfram Sang, linux-i2c, linux-kernel,
Senthil, Bala, N, Pandith, Andy Shevchenko
Cc: Saha, Tamal
On 12/1/21 7:51 AM, D, Lakshmi Sowjanya wrote:
>> True, only sda_hold(_time) is u32 and other timing parameters are u16.
>>
>> Lakshmi: Would you like to send a patch fixing this and get more contributions
>> to the driver :-)
>
> Thanks Wolfram and Jarkko,
>
> Sure. I will send a patch fixing it.
>
See the comments from Andy. Recent enough Elkhart Lake BIOS and his
patches from last year already provide the timing parameters. Feeling
embarrassed I forgot them :-(
Jarkko
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode
2021-12-01 7:33 ` Jarkko Nikula
@ 2021-12-01 8:36 ` Wolfram Sang
2021-12-01 9:39 ` D, Lakshmi Sowjanya
0 siblings, 1 reply; 15+ messages in thread
From: Wolfram Sang @ 2021-12-01 8:36 UTC (permalink / raw)
To: Jarkko Nikula
Cc: D, Lakshmi Sowjanya, linux-i2c, linux-kernel, Senthil, Bala, N,
Pandith, Andy Shevchenko, Saha, Tamal
[-- Attachment #1: Type: text/plain, Size: 244 bytes --]
> See the comments from Andy. Recent enough Elkhart Lake BIOS and his patches
> from last year already provide the timing parameters. Feeling embarrassed I
> forgot them :-(
But the u16 conversion of the existing parameters is still useful?
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 15+ messages in thread
* RE: [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode
2021-12-01 8:36 ` Wolfram Sang
@ 2021-12-01 9:39 ` D, Lakshmi Sowjanya
2021-12-01 11:35 ` Jarkko Nikula
0 siblings, 1 reply; 15+ messages in thread
From: D, Lakshmi Sowjanya @ 2021-12-01 9:39 UTC (permalink / raw)
To: Wolfram Sang, Jarkko Nikula
Cc: linux-i2c, linux-kernel, Senthil, Bala, N, Pandith,
Andy Shevchenko, Saha, Tamal
>-----Original Message-----
>From: Wolfram Sang <wsa@kernel.org>
>Sent: Wednesday, December 1, 2021 2:07 PM
>To: Jarkko Nikula <jarkko.nikula@linux.intel.com>
>Cc: D, Lakshmi Sowjanya <lakshmi.sowjanya.d@intel.com>; linux-
>i2c@vger.kernel.org; linux-kernel@vger.kernel.org; Senthil, Bala
><bala.senthil@intel.com>; N, Pandith <pandith.n@intel.com>; Andy
>Shevchenko <andriy.shevchenko@linux.intel.com>; Saha, Tamal
><tamal.saha@intel.com>
>Subject: Re: [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode
>Plus and High Speed Mode
>
>
>> See the comments from Andy. Recent enough Elkhart Lake BIOS and his
>> patches from last year already provide the timing parameters. Feeling
>> embarrassed I forgot them :-(
>
>But the u16 conversion of the existing parameters is still useful?
Jarkko: I've seen the changes by Andy. These patches are no more required as suggested. I'm following up on the same, regarding ACPI table entries.
I have the same query...is the u16 conversion of existing parameters still useful?
Regards
Lakshmi Sowjanya D
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode
2021-12-01 9:39 ` D, Lakshmi Sowjanya
@ 2021-12-01 11:35 ` Jarkko Nikula
0 siblings, 0 replies; 15+ messages in thread
From: Jarkko Nikula @ 2021-12-01 11:35 UTC (permalink / raw)
To: D, Lakshmi Sowjanya, Wolfram Sang
Cc: linux-i2c, linux-kernel, Senthil, Bala, N, Pandith,
Andy Shevchenko, Saha, Tamal
On 12/1/21 11:39 AM, D, Lakshmi Sowjanya wrote:
>
>
>> -----Original Message-----
>> From: Wolfram Sang <wsa@kernel.org>
>> Sent: Wednesday, December 1, 2021 2:07 PM
>> To: Jarkko Nikula <jarkko.nikula@linux.intel.com>
>> Cc: D, Lakshmi Sowjanya <lakshmi.sowjanya.d@intel.com>; linux-
>> i2c@vger.kernel.org; linux-kernel@vger.kernel.org; Senthil, Bala
>> <bala.senthil@intel.com>; N, Pandith <pandith.n@intel.com>; Andy
>> Shevchenko <andriy.shevchenko@linux.intel.com>; Saha, Tamal
>> <tamal.saha@intel.com>
>> Subject: Re: [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode
>> Plus and High Speed Mode
>>
>>
>>> See the comments from Andy. Recent enough Elkhart Lake BIOS and his
>>> patches from last year already provide the timing parameters. Feeling
>>> embarrassed I forgot them :-(
>>
>> But the u16 conversion of the existing parameters is still useful?
>
> Jarkko: I've seen the changes by Andy. These patches are no more required as suggested. I'm following up on the same, regarding ACPI table entries.
>
> I have the same query...is the u16 conversion of existing parameters still useful?
>
Yes, that's useful.
Jarkko
^ permalink raw reply [flat|nested] 15+ messages in thread
end of thread, other threads:[~2021-12-01 11:35 UTC | newest]
Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-11-09 10:35 [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode lakshmi.sowjanya.d
2021-11-09 10:35 ` [PATCH v1 2/2] i2c: designware-pci: Set ideal timing parameters for Elkhart Lake PSE lakshmi.sowjanya.d
2021-11-09 12:59 ` Jarkko Nikula
2021-11-29 17:00 ` Wolfram Sang
2021-11-29 16:57 ` Wolfram Sang
2021-11-30 9:14 ` Andy Shevchenko
2021-11-30 15:49 ` Andy Shevchenko
2021-11-30 21:34 ` Wolfram Sang
2021-11-29 16:56 ` [PATCH v1 1/2] i2c: designware-pci: Add support for Fast Mode Plus and High Speed Mode Wolfram Sang
2021-11-30 7:51 ` Jarkko Nikula
2021-12-01 5:51 ` D, Lakshmi Sowjanya
2021-12-01 7:33 ` Jarkko Nikula
2021-12-01 8:36 ` Wolfram Sang
2021-12-01 9:39 ` D, Lakshmi Sowjanya
2021-12-01 11:35 ` Jarkko Nikula
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).