Re: [PATCH v11 5/8] interconnect: qcom: Add sdm845 interconnect provider driver

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Hi Georgi,

not a full review, only one thing I just stumbled across:

On Fri, Dec 07, 2018 at 05:29:14PM +0200, Georgi Djakov wrote:
> From: David Dai <daidavid1@xxxxxxxxxxxxxx>
> 
> Introduce Qualcomm SDM845 specific provider driver using the
> interconnect framework.
> 
> Signed-off-by: David Dai <daidavid1@xxxxxxxxxxxxxx>
> Signed-off-by: Georgi Djakov <georgi.djakov@xxxxxxxxxx>
> ---
>  .../bindings/interconnect/qcom,sdm845.txt     |  24 +
>  drivers/interconnect/Kconfig                  |   5 +
>  drivers/interconnect/Makefile                 |   1 +
>  drivers/interconnect/qcom/Kconfig             |  13 +
>  drivers/interconnect/qcom/Makefile            |   5 +
>  drivers/interconnect/qcom/sdm845.c            | 836 ++++++++++++++++++
>  .../dt-bindings/interconnect/qcom,sdm845.h    | 143 +++
>  7 files changed, 1027 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/interconnect/qcom,sdm845.txt
>  create mode 100644 drivers/interconnect/qcom/Kconfig
>  create mode 100644 drivers/interconnect/qcom/Makefile
>  create mode 100644 drivers/interconnect/qcom/sdm845.c
>  create mode 100644 include/dt-bindings/interconnect/qcom,sdm845.h
>
> ...
> 
> diff --git a/drivers/interconnect/qcom/sdm845.c b/drivers/interconnect/qcom/sdm845.c
> new file mode 100644
> index 000000000000..f594dd6f500f
> --- /dev/null
> +++ b/drivers/interconnect/qcom/sdm845.c
> 
> ...
> 
> +static int qcom_icc_bcm_init(struct qcom_icc_bcm *bcm, struct device *dev)
> +{
> +	struct qcom_icc_node *qn;
> +	int ret, i;
> +
> +	bcm->addr = cmd_db_read_addr(bcm->name);
> +	if (!bcm->addr) {
> +		dev_err(dev, "%s could not find RPMh address\n",
> +			bcm->name);
> +		return -EINVAL;
> +	}
> +
> +	if (cmd_db_read_aux_data_len(bcm->name) < sizeof(struct bcm_db)) {
> +		dev_err(dev, "%s command db missing or partial aux data\n",
> +			bcm->name);
> +		return -EINVAL;
> +	}

cmd_db_read_aux_data_len() is in the process of being removed, see
ed3cafa79ea7 ("soc: qcom: cmd-db: Stop memcpy()ing in
cmd_db_read_aux_data()") in arm-soc/for-next

https://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git/commit/?h=for-next&id=ed3cafa79ea756be653d22087c017af95ea78a49

Cheers

Matthias



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