linux-kernel - Re: [PATCH] clk: qcom: Fix MSM8998 resets

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Message-ID: <bf2c5a96-6a29-e89b-4b16-8aaab516a7b5@codeaurora.org>
Date:   Mon, 3 Dec 2018 10:19:20 -0700
From:   Jeffrey Hugo <jhugo@...eaurora.org>
To:     Stephen Boyd <sboyd@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     andy.gross@...aro.org, david.brown@...aro.org,
        mturquette@...libre.com, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: qcom: Fix MSM8998 resets

On 12/3/2018 10:02 AM, Stephen Boyd wrote:
> Quoting Jeffrey Hugo (2018-12-03 08:08:46)
>> On 12/3/2018 8:55 AM, Bjorn Andersson wrote:
>>> On Mon 03 Dec 07:34 PST 2018, Jeffrey Hugo wrote:
>>>
>>>> The offsets for the defined BCR reset registers does not match the hardware
>>>> documentation.  Update the values to match the hardware documentation.
>>>>
>>>
>>> Sorry for not spotting this before.
>>>
>>>> Fixes: b5f5f525c547 (clk: qcom: Add MSM8998 Global Clock Control (GCC) driver)
>>>> Signed-off-by: Jeffrey Hugo <jhugo@...eaurora.org>
>>>> ---
>>>>    drivers/clk/qcom/gcc-msm8998.c | 38 +++++++++++++++++++-------------------
>>>>    1 file changed, 19 insertions(+), 19 deletions(-)
>>>>
>>>> diff --git a/drivers/clk/qcom/gcc-msm8998.c b/drivers/clk/qcom/gcc-msm8998.c
>>>> index 9f0ae40..01cc555 100644
>>>> --- a/drivers/clk/qcom/gcc-msm8998.c
>>>> +++ b/drivers/clk/qcom/gcc-msm8998.c
>>>> @@ -2742,25 +2742,25 @@ enum {
>>>>    };
>>>>    
>>>>    static const struct qcom_reset_map gcc_msm8998_resets[] = {
>>>> -    [GCC_BLSP1_QUP1_BCR] = { 0x102400 },
>>>> -    [GCC_BLSP1_QUP2_BCR] = { 0x110592 },
>>>> -    [GCC_BLSP1_QUP3_BCR] = { 0x118784 },
>>>> -    [GCC_BLSP1_QUP4_BCR] = { 0x126976 },
>>>> -    [GCC_BLSP1_QUP5_BCR] = { 0x135168 },
>>>> -    [GCC_BLSP1_QUP6_BCR] = { 0x143360 },
>>>> -    [GCC_BLSP2_QUP1_BCR] = { 0x155648 },
>>>> -    [GCC_BLSP2_QUP2_BCR] = { 0x163840 },
>>>> -    [GCC_BLSP2_QUP3_BCR] = { 0x172032 },
>>>> -    [GCC_BLSP2_QUP4_BCR] = { 0x180224 },
>>>> -    [GCC_BLSP2_QUP5_BCR] = { 0x188416 },
>>>> -    [GCC_BLSP2_QUP6_BCR] = { 0x196608 },
>>>> -    [GCC_PCIE_0_BCR] = { 0x438272 },
>>>> -    [GCC_PDM_BCR] = { 0x208896 },
>>>> -    [GCC_SDCC2_BCR] = { 0x81920 },
>>>> -    [GCC_SDCC4_BCR] = { 0x90112 },
>>>> -    [GCC_TSIF_BCR] = { 0x221184 },
>>>> -    [GCC_UFS_BCR] = { 0x479232 },
>>>> -    [GCC_USB_30_BCR] = { 0x61440 },
>>>> +    [GCC_BLSP1_QUP1_BCR] = { 0x19000 },
>>>> +    [GCC_BLSP1_QUP2_BCR] = { 0x1b000 },
>>>> +    [GCC_BLSP1_QUP3_BCR] = { 0x1d000 },
>>>> +    [GCC_BLSP1_QUP4_BCR] = { 0x1f000 },
>>>> +    [GCC_BLSP1_QUP5_BCR] = { 0x21000 },
>>>> +    [GCC_BLSP1_QUP6_BCR] = { 0x23000 },
>>>> +    [GCC_BLSP2_QUP1_BCR] = { 0x26000 },
>>>> +    [GCC_BLSP2_QUP2_BCR] = { 0x28000 },
>>>> +    [GCC_BLSP2_QUP3_BCR] = { 0x2a000 },
>>>> +    [GCC_BLSP2_QUP4_BCR] = { 0x2c000 },
>>>> +    [GCC_BLSP2_QUP5_BCR] = { 0x2e000 },
>>>> +    [GCC_BLSP2_QUP6_BCR] = { 0x30000 },
>>>> +    [GCC_PCIE_0_BCR] = { 0x6c01c },
>>>
>>> I find GCC_PCIE_0_BCR at 0x6b000 and then GCC_PCIE_0_PHY_BCR at 0x6c01c.
>>
>> Doh.  Thanks for the double check.  GCC_PCIE_0_PHY_BCR is not defined in
>> include/dt-bindings/clock/qcom,gcc-msm8998.h so I plan to leave it out
>> until later.
>>
>> Expect a v2 shortly.
> 
> Will you add GCC_PCIE0_PHY_BCR shortly so we don't have to add it later
> on when it becomes critical?
> 

My plan was to let it sit until it becomes necessary.  I'm working on 
USB and found that GCC_QUSB2PHY_PRIM_BCR, GCC_USB3_PHY_BCR, and 
GCC_USB3PHY_PHY_BCR are also missing, so I suspect there are others.

Would you prefer I send a follow up that adds the PCIE phy and the USB 
resets?

-- 
Jeffrey Hugo
Qualcomm Datacenter Technologies as an affiliate of Qualcomm 
Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.