linux-kernel - Re: [PATCH v6 5/7] clk: qcom: Add NSS clock Controller driver for IPQ9574

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Message-ID: <72r4uowjwoxkeqq6bxhdv72wq4rqogirb3yyp2ku66rr2cnzbs@i2lk6sgfvenh>
Date: Sun, 6 Oct 2024 23:02:47 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
Cc: andersson@...nel.org, mturquette@...libre.com, sboyd@...nel.org, 
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org, konradybcio@...nel.org, 
	catalin.marinas@....com, will@...nel.org, p.zabel@...gutronix.de, 
	richardcochran@...il.com, geert+renesas@...der.be, neil.armstrong@...aro.org, 
	arnd@...db.de, nfraprado@...labora.com, quic_anusha@...cinc.com, 
	linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org, 
	quic_srichara@...cinc.com, quic_varada@...cinc.com
Subject: Re: [PATCH v6 5/7] clk: qcom: Add NSS clock Controller driver for
 IPQ9574

On Fri, Oct 04, 2024 at 01:33:30PM GMT, Manikanta Mylavarapu wrote:
> From: Devi Priya <quic_devipriy@...cinc.com>
> 
> Add Networking Sub System Clock Controller(NSSCC) driver for ipq9574 based
> devices.
> 
> Signed-off-by: Devi Priya <quic_devipriy@...cinc.com>
> Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
> ---
> Changes in V6:
> 	- Remove 'nsscc_ipq9574_desc' and use 'nss_cc_ipq9574_desc' in
> 	  probe()
> 	- Drop of_clk_get() and clk_prepare_enable() in probe() because
> 	  ethernet node will subscribe to GCC_NSSCC_CLK and enable it.

Does the cllock supply the clock controller? If not, it should be
dropped from bindings too.

> 	- Drop Tested-by tag
> 
>  drivers/clk/qcom/Kconfig         |    7 +
>  drivers/clk/qcom/Makefile        |    1 +
>  drivers/clk/qcom/nsscc-ipq9574.c | 3084 ++++++++++++++++++++++++++++++
>  3 files changed, 3092 insertions(+)
>  create mode 100644 drivers/clk/qcom/nsscc-ipq9574.c
> 
> diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
> index a3e2a09e2105..b9a5cc9fd8c8 100644
> --- a/drivers/clk/qcom/Kconfig
> +++ b/drivers/clk/qcom/Kconfig
> @@ -255,6 +255,13 @@ config IPQ_GCC_9574
>  	  i2c, USB, SD/eMMC, etc. Select this for the root clock
>  	  of ipq9574.
>  
> +config IPQ_NSSCC_9574
> +        tristate "IPQ9574 NSS Clock Controller"
> +        depends on ARM64 || COMPILE_TEST
> +        depends on IPQ_GCC_9574
> +        help
> +          Support for NSS clock controller on ipq9574 devices.
> +
>  config IPQ_NSSCC_QCA8K
>  	tristate "QCA8K(QCA8386 or QCA8084) NSS Clock Controller"
>  	depends on MDIO_BUS
> diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
> index 2b378667a63f..65b825a54c45 100644
> --- a/drivers/clk/qcom/Makefile
> +++ b/drivers/clk/qcom/Makefile
> @@ -36,6 +36,7 @@ obj-$(CONFIG_IPQ_GCC_6018) += gcc-ipq6018.o
>  obj-$(CONFIG_IPQ_GCC_806X) += gcc-ipq806x.o
>  obj-$(CONFIG_IPQ_GCC_8074) += gcc-ipq8074.o
>  obj-$(CONFIG_IPQ_GCC_9574) += gcc-ipq9574.o
> +obj-$(CONFIG_IPQ_NSSCC_9574)	+= nsscc-ipq9574.o
>  obj-$(CONFIG_IPQ_LCC_806X) += lcc-ipq806x.o
>  obj-$(CONFIG_IPQ_NSSCC_QCA8K) += nsscc-qca8k.o
>  obj-$(CONFIG_MDM_GCC_9607) += gcc-mdm9607.o
> diff --git a/drivers/clk/qcom/nsscc-ipq9574.c b/drivers/clk/qcom/nsscc-ipq9574.c
> new file mode 100644
> index 000000000000..acbd1c3855d2
> --- /dev/null
> +++ b/drivers/clk/qcom/nsscc-ipq9574.c
> @@ -0,0 +1,3084 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2021, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/err.h>
> +#include <linux/interconnect-provider.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +#include <linux/platform_device.h>
> +
> +#include <dt-bindings/clock/qcom,ipq9574-nsscc.h>
> +#include <dt-bindings/interconnect/qcom,ipq9574.h>
> +#include <dt-bindings/reset/qcom,ipq9574-nsscc.h>
> +
> +#include "clk-alpha-pll.h"
> +#include "clk-branch.h"
> +#include "clk-pll.h"
> +#include "clk-rcg.h"
> +#include "clk-regmap.h"
> +#include "clk-regmap-divider.h"
> +#include "clk-regmap-mux.h"
> +#include "common.h"
> +#include "reset.h"
> +
> +/* Need to match the order of clocks in DT binding */
> +enum {
> +	DT_XO,
> +	DT_BIAS_PLL_CC_CLK,
> +	DT_BIAS_PLL_NSS_NOC_CLK,
> +	DT_BIAS_PLL_UBI_NC_CLK,
> +	DT_GCC_GPLL0_OUT_AUX,
> +	DT_UNIPHY0_NSS_RX_CLK,
> +	DT_UNIPHY0_NSS_TX_CLK,
> +	DT_UNIPHY1_NSS_RX_CLK,
> +	DT_UNIPHY1_NSS_TX_CLK,
> +	DT_UNIPHY2_NSS_RX_CLK,
> +	DT_UNIPHY2_NSS_TX_CLK,
> +};
> +

I didn't check the driver, but LGTM.

-- 
With best wishes
Dmitry