Re: [PATCH v2 6/6] clk: qcom: Add TCSR clock driver for Eliza

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 1/28/26 3:10 PM, Abel Vesa wrote:
> On 26-01-28 11:34:49, Konrad Dybcio wrote:
>> On 1/27/26 4:03 PM, Abel Vesa wrote:
>>> Add the TCSR clock controller that provides the refclks on Eliza
>>> platform for PCIe, USB and UFS subsystems.
>>>
>>> Co-developed-by: Taniya Das <taniya.das@oss.qualcomm.com>
>>> Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
>>> Signed-off-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
>>> ---
>>
>> [...]
>>
>>> +++ b/drivers/clk/qcom/tcsrcc-eliza.c
>>> @@ -0,0 +1,144 @@
>>> +// SPDX-License-Identifier: GPL-2.0-only
>>> +/*
>>> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
>>> + */
>>> +
>>> +#include <linux/clk-provider.h>
>>> +#include <linux/mod_devicetable.h>
>>> +#include <linux/module.h>
>>> +#include <linux/of.h>
>>> +#include <linux/platform_device.h>
>>> +#include <linux/regmap.h>
>>> +
>>> +#include <dt-bindings/clock/qcom,eliza-tcsr.h>
>>> +
>>> +#include "clk-branch.h"
>>> +#include "clk-regmap.h"
>>> +#include "common.h"
>>> +
>>> +enum {
>>> +	DT_BI_TCXO_PAD,
>>> +};
>>> +
>>> +static struct clk_branch tcsr_pcie_0_clkref_en = {
>>> +	.halt_reg = 0x0,
>>
>> These regs certainly aren't at +0x0 to what we normally expect to
>> be the start of the TCSR node
> 
> They are if we add the TCSR node with reg range starting at 0x1fbf000.

"if we take the wrong base, the wrong offset is right" ;)

The docs for Eliza don't have the nice separation like on e.g. Hamoa,
but 0x01fc0000 is what we generally agreed upon to be "tcsr".

The registers that first appear in that region are the same as on Hamoa,
and so is the address, so let's continue that tradition

Konrad