From: Stephen Boyd <sboyd@kernel.org>
To: Emil Renner Berthing <kernel@esmil.dk>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Michael Turquette <mturquette@baylibre.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Xingyu Wu <xingyu.wu@starfivetech.com>,
devicetree@vger.kernel.org, linux-riscv@lists.infradead.org
Cc: Rob Herring <robh+dt@kernel.org>, Conor Dooley <conor@kernel.org>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Hal Feng <hal.feng@starfivetech.com>,
Xingyu Wu <xingyu.wu@starfivetech.com>,
linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org
Subject: Re: [PATCH v1 03/11] clk: starfive: Add StarFive JH7110 System-Top-Group clock driver
Date: Wed, 25 Jan 2023 18:33:54 -0800 [thread overview]
Message-ID: <5bb5263d26b157548d7ba39f80989c69.sboyd@kernel.org> (raw)
In-Reply-To: <20230120024445.244345-4-xingyu.wu@starfivetech.com>
Quoting Xingyu Wu (2023-01-19 18:44:37)
> diff --git a/drivers/clk/starfive/clk-starfive-jh7110-stg.c b/drivers/clk/starfive/clk-starfive-jh7110-stg.c
> new file mode 100644
> index 000000000000..c2740f44e796
> --- /dev/null
> +++ b/drivers/clk/starfive/clk-starfive-jh7110-stg.c
> @@ -0,0 +1,180 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * StarFive JH7110 System-Top-Group Clock Driver
> + *
> + * Copyright (C) 2022 StarFive Technology Co., Ltd.
> + */
> +
> +#include <linux/clk.h>
Is this include used? If not, please remove.
> +#include <linux/clk-provider.h>
> +#include <linux/io.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +
> +#include <dt-bindings/clock/starfive,jh7110-crg.h>
> +
> +#include "clk-starfive-jh71x0.h"
> +
[...]
> +static int jh7110_stgcrg_probe(struct platform_device *pdev)
> +{
> + struct jh71x0_clk_priv *priv;
> + unsigned int idx;
> + int ret;
> +
> + priv = devm_kzalloc(&pdev->dev,
> + struct_size(priv, reg, JH7110_STGCLK_END),
> + GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + spin_lock_init(&priv->rmw_lock);
> + priv->dev = &pdev->dev;
> + priv->base = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(priv->base))
> + return PTR_ERR(priv->base);
> +
> + dev_set_drvdata(priv->dev, priv->base);
> +
> + for (idx = 0; idx < JH7110_STGCLK_END; idx++) {
> + u32 max = jh7110_stgclk_data[idx].max;
> + struct clk_parent_data parents[4] = {};
> + struct clk_init_data init = {
> + .name = jh7110_stgclk_data[idx].name,
> + .ops = starfive_jh71x0_clk_ops(max),
> + .parent_data = parents,
> + .num_parents =
> + ((max & JH71X0_CLK_MUX_MASK) >> JH71X0_CLK_MUX_SHIFT) + 1,
> + .flags = jh7110_stgclk_data[idx].flags,
> + };
> + struct jh71x0_clk *clk = &priv->reg[idx];
> + unsigned int i;
> +
> + for (i = 0; i < init.num_parents; i++) {
> + unsigned int pidx = jh7110_stgclk_data[idx].parents[i];
> +
> + if (pidx < JH7110_STGCLK_END)
> + parents[i].hw = &priv->reg[pidx].hw;
> + else if (pidx == JH7110_STGCLK_OSC)
> + parents[i].fw_name = "osc";
> + else if (pidx == JH7110_STGCLK_HIFI4_CORE)
> + parents[i].fw_name = "hifi4_core";
> + else if (pidx == JH7110_STGCLK_STG_AXIAHB)
> + parents[i].fw_name = "stg_axiahb";
> + else if (pidx == JH7110_STGCLK_USB_125M)
> + parents[i].fw_name = "usb_125m";
> + else if (pidx == JH7110_STGCLK_CPU_BUS)
> + parents[i].fw_name = "cpu_bus";
> + else if (pidx == JH7110_STGCLK_HIFI4_AXI)
> + parents[i].fw_name = "hifi4_axi";
> + else if (pidx == JH7110_STGCLK_NOCSTG_BUS)
> + parents[i].fw_name = "nocstg_bus";
> + else if (pidx == JH7110_STGCLK_APB_BUS)
> + parents[i].fw_name = "apb_bus";
Can this be an array lookup instead of a pile of conditions?
if (pidx < JH7110_STGCLK_END)
...
else
parents[i].fw_name = fw_table[pidx - JH7110_STGCLK_END];
Or even better, don't use strings at all and just make the 'pidx' number
(possibly minus the end constant) be the 'clocks' property index that
you want.
> + }
> +
> + clk->hw.init = &init;
> + clk->idx = idx;
> + clk->max_div = max & JH71X0_CLK_DIV_MASK;
> +
> + ret = devm_clk_hw_register(&pdev->dev, &clk->hw);
> + if (ret)
> + return ret;
> + }
> +
> + ret = devm_of_clk_add_hw_provider(&pdev->dev, jh7110_stgclk_get, priv);
> + if (ret)
> + return ret;
> +
> + return jh7110_reset_controller_register(priv, "reset-stg", 2);
Is this also devm-ified?
next prev parent reply other threads:[~2023-01-26 2:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-20 2:44 [PATCH v1 00/11] Add new partial clock and reset drivers for StarFive JH7110 Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 01/11] dt-bindings: clock: Add StarFive JH7110 System-Top-Group clock and reset generator Xingyu Wu
2023-01-20 8:11 ` Krzysztof Kozlowski
2023-01-30 6:17 ` Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 02/11] reset: starfive: jh7110: Add StarFive System-Top-Group reset support Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 03/11] clk: starfive: Add StarFive JH7110 System-Top-Group clock driver Xingyu Wu
2023-01-26 2:33 ` Stephen Boyd [this message]
2023-01-30 8:02 ` Xingyu Wu
2023-01-31 0:35 ` Stephen Boyd
2023-01-31 6:51 ` Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 04/11] dt-bindings: clock: Add StarFive JH7110 Image-Signal-Process clock and reset generator Xingyu Wu
2023-01-20 8:12 ` Krzysztof Kozlowski
2023-01-30 8:03 ` Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 05/11] reset: starfive: jh7110: Add StarFive Image-Signal-Process reset support Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 06/11] clk: starfive: Add StarFive JH7110 Image-Signal-Process clock driver Xingyu Wu
2023-01-26 2:35 ` Stephen Boyd
2023-01-30 8:09 ` Xingyu Wu
2023-01-31 0:38 ` Stephen Boyd
2023-01-31 6:52 ` Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 07/11] dt-bindings: clock: Add StarFive JH7110 Video-Output clock and reset generator Xingyu Wu
2023-01-20 8:13 ` Krzysztof Kozlowski
2023-01-30 8:10 ` Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 08/11] reset: starfive: jh7110: Add StarFive Video-Output reset support Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 09/11] clk: starfive: Add StarFive JH7110 Video-Output clock driver Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 10/11] riscv: dts: starfive: jh7110: Add DVP and HDMI TX pixel external clocks Xingyu Wu
2023-01-20 2:44 ` [PATCH v1 11/11] riscv: dts: starfive: jh7110: Add STGCRG/ISPCRG/VOUTCRG nodes Xingyu Wu
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