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Date: Thu, 16 Mar 2023 12:11:57 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Taniya Das <quic_tdas@...cinc.com>
Cc: Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
quic_skakitap@...cinc.com, quic_jkona@...cinc.com
Subject: Re: [PATCH 2/3] clk: qcom: videocc-sm8450: Add video clock controller
driver for SM8450
On Thu, 16 Mar 2023 at 10:31, Taniya Das <quic_tdas@...cinc.com> wrote:
>
> Add support for the video clock controller driver for peripheral clock
> clients to be able to request for video cc clocks.
>
> Signed-off-by: Taniya Das <quic_tdas@...cinc.com>
> ---
> drivers/clk/qcom/Kconfig | 9 +
> drivers/clk/qcom/Makefile | 1 +
> drivers/clk/qcom/videocc-sm8450.c | 464 ++++++++++++++++++++++++++++++
> 3 files changed, 474 insertions(+)
> create mode 100644 drivers/clk/qcom/videocc-sm8450.c
>
> diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
> index 5ab4b7dfe3c2..81909e179bc7 100644
> --- a/drivers/clk/qcom/Kconfig
> +++ b/drivers/clk/qcom/Kconfig
> @@ -892,4 +892,13 @@ config CLK_GFM_LPASS_SM8250
> Support for the Glitch Free Mux (GFM) Low power audio
> subsystem (LPASS) clocks found on SM8250 SoCs.
>
> +config SM_VIDEOCC_8450
> + tristate "SM8450 Video Clock Controller"
> + select SM_GCC_8450
> + select QCOM_GDSC
> + help
> + Support for the video clock controller on Qualcomm Technologies, Inc.
> + SM8450 devices.
> + Say Y if you want to support video devices and functionality such as
> + video encode/decode.
> endif
> diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
> index c743805a9cbb..5cbd0eedd6d9 100644
> --- a/drivers/clk/qcom/Makefile
> +++ b/drivers/clk/qcom/Makefile
> @@ -119,6 +119,7 @@ obj-$(CONFIG_SM_GPUCC_8350) += gpucc-sm8350.o
> obj-$(CONFIG_SM_TCSRCC_8550) += tcsrcc-sm8550.o
> obj-$(CONFIG_SM_VIDEOCC_8150) += videocc-sm8150.o
> obj-$(CONFIG_SM_VIDEOCC_8250) += videocc-sm8250.o
> +obj-$(CONFIG_SM_VIDEOCC_8450) += videocc-sm8450.o
> obj-$(CONFIG_SPMI_PMIC_CLKDIV) += clk-spmi-pmic-div.o
> obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
> obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
> diff --git a/drivers/clk/qcom/videocc-sm8450.c b/drivers/clk/qcom/videocc-sm8450.c
> new file mode 100644
> index 000000000000..ca60f3be587d
> --- /dev/null
> +++ b/drivers/clk/qcom/videocc-sm8450.c
> @@ -0,0 +1,464 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
> +
> +#include <dt-bindings/clock/qcom,videocc-sm8450.h>
> +
> +#include "clk-alpha-pll.h"
> +#include "clk-branch.h"
> +#include "clk-rcg.h"
> +#include "clk-regmap.h"
> +#include "clk-regmap-divider.h"
> +#include "common.h"
> +#include "gdsc.h"
> +#include "reset.h"
> +
> +enum {
> + P_BI_TCXO,
> + P_VIDEO_CC_PLL0_OUT_MAIN,
> + P_VIDEO_CC_PLL1_OUT_MAIN,
> +};
> +
> +static const struct pll_vco lucid_evo_vco[] = {
> + { 249600000, 2020000000, 0 },
> +};
> +
> +static const struct alpha_pll_config video_cc_pll0_config = {
> + .l = 0x1E,
> + .alpha = 0x0,
> + .config_ctl_val = 0x20485699,
> + .config_ctl_hi_val = 0x00182261,
> + .config_ctl_hi1_val = 0x32AA299C,
> + .user_ctl_val = 0x00000000,
> + .user_ctl_hi_val = 0x00000805,
> +};
> +
> +static struct clk_alpha_pll video_cc_pll0 = {
> + .offset = 0x0,
> + .vco_table = lucid_evo_vco,
> + .num_vco = ARRAY_SIZE(lucid_evo_vco),
> + .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID_EVO],
> + .clkr = {
> + .hw.init = &(const struct clk_init_data){
> + .name = "video_cc_pll0",
> + .parent_data = &(const struct clk_parent_data){
> + .fw_name = "bi_tcxo",
Could you please follow the last of recent drivers and use DT indices
instead of clock-names?
Also, as a syntax nit, could you please add whitespaces between ) and { ?
> + },
> + .num_parents = 1,
> + .ops = &clk_alpha_pll_lucid_evo_ops,
> + },
> + },
> +};
> +
[skipped]
> +
> +static void video_cc_sm8450_pm_runtime_disable(void *data)
> +{
> + pm_runtime_disable(data);
> +}
> +
> +static int video_cc_sm8450_probe(struct platform_device *pdev)
> +{
> + struct regmap *regmap;
> + int ret;
> +
> + pm_runtime_enable(&pdev->dev);
> +
> + ret = devm_add_action_or_reset(&pdev->dev, video_cc_sm8450_pm_runtime_disable, &pdev->dev);
> + if (ret)
> + return ret;
Could you please shift to using devm_pm_runtime_enable()?
> +
> + ret = pm_runtime_resume_and_get(&pdev->dev);
> + if (ret)
> + return ret;
> +
> + regmap = qcom_cc_map(pdev, &video_cc_sm8450_desc);
> + if (IS_ERR(regmap)) {
> + pm_runtime_put(&pdev->dev);
> + return PTR_ERR(regmap);
> + }
> +
> + clk_lucid_evo_pll_configure(&video_cc_pll0, regmap, &video_cc_pll0_config);
> + clk_lucid_evo_pll_configure(&video_cc_pll1, regmap, &video_cc_pll1_config);
> +
> + /*
> + * Keep clocks always enabled:
> + * video_cc_ahb_clk
> + * video_cc_sleep_clk
> + * video_cc_xo_clk
> + */
> + regmap_update_bits(regmap, 0x80e4, BIT(0), BIT(0));
> + regmap_update_bits(regmap, 0x8130, BIT(0), BIT(0));
> + regmap_update_bits(regmap, 0x8114, BIT(0), BIT(0));
> +
> + ret = qcom_cc_really_probe(pdev, &video_cc_sm8450_desc, regmap);
> +
> + pm_runtime_put(&pdev->dev);
> +
> + return ret;
> +}
> +
> +static struct platform_driver video_cc_sm8450_driver = {
> + .probe = video_cc_sm8450_probe,
> + .driver = {
> + .name = "video_cc-sm8450",
> + .of_match_table = video_cc_sm8450_match_table,
> + },
> +};
> +
> +static int __init video_cc_sm8450_init(void)
> +{
> + return platform_driver_register(&video_cc_sm8450_driver);
> +}
> +subsys_initcall(video_cc_sm8450_init);
> +
> +static void __exit video_cc_sm8450_exit(void)
> +{
> + platform_driver_unregister(&video_cc_sm8450_driver);
> +}
> +module_exit(video_cc_sm8450_exit);
> +
> +MODULE_DESCRIPTION("QTI VIDEO_CC SM8450 Driver");
> +MODULE_LICENSE("GPL v2");
I think this should be just "GPL" nowaways.
> --
> 2.17.1
>
--
With best wishes
Dmitry
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