[3/6] i2c: i2c-qcom-geni: Add interconnect support
diff mbox series

Message ID 1548138816-1149-4-git-send-email-alokc@codeaurora.org
State New, archived
Headers show
Series
  • Add interconnect support for GENI QUPs
Related show

Commit Message

Alok Chauhan Jan. 22, 2019, 6:33 a.m. UTC
Get the interconnect paths for I2C based Serial Engine device
and vote accordingly based on maximum supported I2C frequency.

Signed-off-by: Alok Chauhan <alokc@codeaurora.org>
---
 drivers/i2c/busses/i2c-qcom-geni.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Comments

Wolfram Sang Jan. 22, 2019, 9:07 a.m. UTC | #1
On Tue, Jan 22, 2019 at 12:03:33PM +0530, Alok Chauhan wrote:
> Get the interconnect paths for I2C based Serial Engine device
> and vote accordingly based on maximum supported I2C frequency.
> 
> Signed-off-by: Alok Chauhan <alokc@codeaurora.org>

Acked-by: Wolfram Sang <wsa@the-dreams.de>
Peter Rosin Jan. 22, 2019, 9:13 a.m. UTC | #2
On 2019-01-22 07:33, Alok Chauhan wrote:
> Get the interconnect paths for I2C based Serial Engine device
> and vote accordingly based on maximum supported I2C frequency.
> 
> Signed-off-by: Alok Chauhan <alokc@codeaurora.org>
> ---
>  drivers/i2c/busses/i2c-qcom-geni.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
> index db075bc..e8fe63a 100644
> --- a/drivers/i2c/busses/i2c-qcom-geni.c
> +++ b/drivers/i2c/busses/i2c-qcom-geni.c
> @@ -14,6 +14,7 @@
>  #include <linux/pm_runtime.h>
>  #include <linux/qcom-geni-se.h>
>  #include <linux/spinlock.h>
> +#include <linux/interconnect.h>

Please keep the includes sorted. Probably applies for the other patches
in the series as well?

Cheers,
Peter
Alok Chauhan Jan. 23, 2019, 6:51 a.m. UTC | #3
On 2019-01-22 14:43, Peter Rosin wrote:
> On 2019-01-22 07:33, Alok Chauhan wrote:
>> Get the interconnect paths for I2C based Serial Engine device
>> and vote accordingly based on maximum supported I2C frequency.
>> 
>> Signed-off-by: Alok Chauhan <alokc@codeaurora.org>
>> ---
>>  drivers/i2c/busses/i2c-qcom-geni.c | 13 +++++++++++++
>>  1 file changed, 13 insertions(+)
>> 
>> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c 
>> b/drivers/i2c/busses/i2c-qcom-geni.c
>> index db075bc..e8fe63a 100644
>> --- a/drivers/i2c/busses/i2c-qcom-geni.c
>> +++ b/drivers/i2c/busses/i2c-qcom-geni.c
>> @@ -14,6 +14,7 @@
>>  #include <linux/pm_runtime.h>
>>  #include <linux/qcom-geni-se.h>
>>  #include <linux/spinlock.h>
>> +#include <linux/interconnect.h>
> 
> Please keep the includes sorted. Probably applies for the other patches
> in the series as well?
> 
> Cheers,
> Peter

Sure, will do. Thanks for your comment.
Evan Green Jan. 24, 2019, 1:19 a.m. UTC | #4
On Mon, Jan 21, 2019 at 10:34 PM Alok Chauhan <alokc@codeaurora.org> wrote:
>
> Get the interconnect paths for I2C based Serial Engine device
> and vote accordingly based on maximum supported I2C frequency.
>
> Signed-off-by: Alok Chauhan <alokc@codeaurora.org>
> ---
>  drivers/i2c/busses/i2c-qcom-geni.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
> index db075bc..e8fe63a 100644
> --- a/drivers/i2c/busses/i2c-qcom-geni.c
> +++ b/drivers/i2c/busses/i2c-qcom-geni.c
> @@ -14,6 +14,7 @@
>  #include <linux/pm_runtime.h>
>  #include <linux/qcom-geni-se.h>
>  #include <linux/spinlock.h>
> +#include <linux/interconnect.h>
>
>  #define SE_I2C_TX_TRANS_LEN            0x26c
>  #define SE_I2C_RX_TRANS_LEN            0x270
> @@ -508,6 +509,15 @@ static int geni_i2c_probe(struct platform_device *pdev)
>                 return ret;
>         }
>
> +       /* Set the bus quota to a reasonable value */
> +       gi2c->se.avg_bw = Bps_to_icc(1000);
> +       gi2c->se.peak_bw = Bps_to_icc(76800000);

Can you compute a real bandwidth based on the i2c bus speed, rather
than some max vote?

Patch
diff mbox series

diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index db075bc..e8fe63a 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -14,6 +14,7 @@ 
 #include <linux/pm_runtime.h>
 #include <linux/qcom-geni-se.h>
 #include <linux/spinlock.h>
+#include <linux/interconnect.h>
 
 #define SE_I2C_TX_TRANS_LEN		0x26c
 #define SE_I2C_RX_TRANS_LEN		0x270
@@ -508,6 +509,15 @@  static int geni_i2c_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	/* Set the bus quota to a reasonable value */
+	gi2c->se.avg_bw = Bps_to_icc(1000);
+	gi2c->se.peak_bw = Bps_to_icc(76800000);
+	ret = geni_interconnect_init(&gi2c->se);
+	if (ret) {
+		dev_err(&pdev->dev, "interconnect_init failed %d\n", ret);
+		return ret;
+	}
+
 	ret = device_property_read_u32(&pdev->dev, "clock-frequency",
 							&gi2c->clk_freq_out);
 	if (ret) {
@@ -611,6 +621,8 @@  static int __maybe_unused geni_i2c_runtime_suspend(struct device *dev)
 		gi2c->suspended = 1;
 	}
 
+	geni_icc_update_bw(&gi2c->se, false);
+
 	return 0;
 }
 
@@ -619,6 +631,7 @@  static int __maybe_unused geni_i2c_runtime_resume(struct device *dev)
 	int ret;
 	struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
 
+	geni_icc_update_bw(&gi2c->se, true);
 	ret = geni_se_resources_on(&gi2c->se);
 	if (ret)
 		return ret;