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SubjectRe: [PATCH 7/7] clk: qcom: Add GPUCC driver support for SM4450
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On 3/31/2024 7:09 AM, Dmitry Baryshkov wrote:
> On Sat, 30 Mar 2024 at 20:30, Ajit Pandey <quic_ajipan@quicinc.com> wrote:
>>
>> Add Graphics Clock Controller (GPUCC) support for SM4450 platform.
>>
>> Signed-off-by: Ajit Pandey <quic_ajipan@quicinc.com>
>> ---
>> drivers/clk/qcom/Kconfig | 9 +
>> drivers/clk/qcom/Makefile | 1 +
>> drivers/clk/qcom/gpucc-sm4450.c | 806 ++++++++++++++++++++++++++++++++
>> 3 files changed, 816 insertions(+)
>> create mode 100644 drivers/clk/qcom/gpucc-sm4450.c
>>
>
> [skipped]
>
>> +static int gpu_cc_sm4450_probe(struct platform_device *pdev)
>> +{
>> + struct regmap *regmap;
>> +
>> + regmap = qcom_cc_map(pdev, &gpu_cc_sm4450_desc);
>> + if (IS_ERR(regmap))
>> + return PTR_ERR(regmap);
>> +
>> + clk_lucid_evo_pll_configure(&gpu_cc_pll0, regmap, &gpu_cc_pll0_config);
>> + clk_lucid_evo_pll_configure(&gpu_cc_pll1, regmap, &gpu_cc_pll1_config);
>> +
>> + /* Keep some clocks always enabled */
>> + qcom_branch_set_clk_en(regmap, 0x93a4); /* GPU_CC_CB_CLK */
>> + qcom_branch_set_clk_en(regmap, 0x9004); /* GPU_CC_CXO_AON_CLK */
>> + qcom_branch_set_clk_en(regmap, 0x900c); /* GPU_CC_DEMET_CLK */
>
> Why? At least other drivers model these three clocks properly.
>
These clocks are POR on in SM4450 and required to be kept always enabled
for GPU functionality hence keep them enabled from probe only.

>> +
>> + return qcom_cc_really_probe(pdev, &gpu_cc_sm4450_desc, regmap);
>> +}
>> +
>> +static struct platform_driver gpu_cc_sm4450_driver = {
>> + .probe = gpu_cc_sm4450_probe,
>> + .driver = {
>> + .name = "gpucc-sm4450",
>> + .of_match_table = gpu_cc_sm4450_match_table,
>> + },
>> +};
>> +
>> +module_platform_driver(gpu_cc_sm4450_driver);
>> +
>> +MODULE_DESCRIPTION("QTI GPUCC SM4450 Driver");
>> +MODULE_LICENSE("GPL");
>> --
>> 2.25.1
>>
>>
>
>

--
Thanks, and Regards
Ajit

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