[PATCH v1 0/2] Add support for IPA clock for SC7180

[PATCH v1 0/2] Add support for IPA clock for SC7180

[Taniya Das]

Support IPA clock for SC7180 and also handle undefined clock registration
in clk-rpmh driver.

Taniya Das (2):
  clk: qcom: rpmh: skip undefined clocks when registering
  clk: qcom: rpmh: Add IPA clock for SC7180

 drivers/clk/qcom/clk-rpmh.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--
Qualcomm INDIA, on behalf of Qualcomm Innovation Center, Inc.is a member
of the Code Aurora Forum, hosted by the  Linux Foundation.

[PATCH v1 1/2] clk: qcom: rpmh: skip undefined clocks when registering

[Taniya Das]

When iterating over a platform's available clocks in clk_rpmh_probe(),
check for undefined (null) entries in the clocks array.  Not all
clock indexes necessarily have clocks defined. Also remove referencing
the clock name before valid hardware.

Signed-off-by: Taniya Das <tdas@codeaurora.org>
---
 drivers/clk/qcom/clk-rpmh.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/qcom/clk-rpmh.c b/drivers/clk/qcom/clk-rpmh.c
index 7ed313a..05cbe6f 100644
--- a/drivers/clk/qcom/clk-rpmh.c
+++ b/drivers/clk/qcom/clk-rpmh.c
@@ -431,11 +431,13 @@ static int clk_rpmh_probe(struct platform_device *pdev)
 	hw_clks = desc->clks;

 	for (i = 0; i < desc->num_clks; i++) {
-		const char *name = hw_clks[i]->init->name;
 		u32 res_addr;
 		size_t aux_data_len;
 		const struct bcm_db *data;

+		if (!hw_clks[i])
+			continue;
+
 		rpmh_clk = to_clk_rpmh(hw_clks[i]);
 		res_addr = cmd_db_read_addr(rpmh_clk->res_name);
 		if (!res_addr) {
@@ -462,7 +464,8 @@ static int clk_rpmh_probe(struct platform_device *pdev)

 		ret = devm_clk_hw_register(&pdev->dev, hw_clks[i]);
 		if (ret) {
-			dev_err(&pdev->dev, "failed to register %s\n", name);
+			dev_err(&pdev->dev, "failed to register %s\n",
+							hw_clks[i]->init->name);
 			return ret;
 		}
 	}
--
Qualcomm INDIA, on behalf of Qualcomm Innovation Center, Inc.is a member
of the Code Aurora Forum, hosted by the  Linux Foundation.

[PATCH v1 2/2] clk: qcom: rpmh: Add IPA clock for SC7180

[Taniya Das]

The Qualcomm IP Accelerator (IPA) clock resource that is managed by the BCM is
required by the IPA driver in order to scale its core clock.

Signed-off-by: Taniya Das <tdas@codeaurora.org>
---
 drivers/clk/qcom/clk-rpmh.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/qcom/clk-rpmh.c b/drivers/clk/qcom/clk-rpmh.c
index 05cbe6f..b186479 100644
--- a/drivers/clk/qcom/clk-rpmh.c
+++ b/drivers/clk/qcom/clk-rpmh.c
@@ -396,6 +396,7 @@ static struct clk_hw *sc7180_rpmh_clocks[] = {
 	[RPMH_RF_CLK1_A]	= &sdm845_rf_clk1_ao.hw,
 	[RPMH_RF_CLK2]		= &sdm845_rf_clk2.hw,
 	[RPMH_RF_CLK2_A]	= &sdm845_rf_clk2_ao.hw,
+	[RPMH_IPA_CLK]		= &sdm845_ipa.hw,
 };

 static const struct clk_rpmh_desc clk_rpmh_sc7180 = {
--
Qualcomm INDIA, on behalf of Qualcomm Innovation Center, Inc.is a member
of the Code Aurora Forum, hosted by the  Linux Foundation.

Re: [PATCH v1 1/2] clk: qcom: rpmh: skip undefined clocks when registering

[Stephen Boyd]

Quoting Taniya Das (2019-12-31 03:00:47)
> diff --git a/drivers/clk/qcom/clk-rpmh.c b/drivers/clk/qcom/clk-rpmh.c
> index 7ed313a..05cbe6f 100644
> --- a/drivers/clk/qcom/clk-rpmh.c
> +++ b/drivers/clk/qcom/clk-rpmh.c
> @@ -462,7 +464,8 @@ static int clk_rpmh_probe(struct platform_device *pdev)
> 
>                 ret = devm_clk_hw_register(&pdev->dev, hw_clks[i]);
>                 if (ret) {
> -                       dev_err(&pdev->dev, "failed to register %s\n", name);
> +                       dev_err(&pdev->dev, "failed to register %s\n",
> +                                                       hw_clks[i]->init->name);

After register clk_hw::init is NULL. This will probably oops. It would
be better to save off the name before registering.

Re: [PATCH v1 1/2] clk: qcom: rpmh: skip undefined clocks when registering

[Taniya Das]

Hello Stephen,

Thanks for your review comments.

On 1/2/2020 6:26 AM, Stephen Boyd wrote:
> Quoting Taniya Das (2019-12-31 03:00:47)
>> diff --git a/drivers/clk/qcom/clk-rpmh.c b/drivers/clk/qcom/clk-rpmh.c
>> index 7ed313a..05cbe6f 100644
>> --- a/drivers/clk/qcom/clk-rpmh.c
>> +++ b/drivers/clk/qcom/clk-rpmh.c
>> @@ -462,7 +464,8 @@ static int clk_rpmh_probe(struct platform_device *pdev)
>>
>>                  ret = devm_clk_hw_register(&pdev->dev, hw_clks[i]);
>>                  if (ret) {
>> -                       dev_err(&pdev->dev, "failed to register %s\n", name);
>> +                       dev_err(&pdev->dev, "failed to register %s\n",
>> +                                                       hw_clks[i]->init->name);
> 
> After register clk_hw::init is NULL. This will probably oops. It would
> be better to save off the name before registering.
> 

Will take care in the next patch series.

-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation.

--