linux-kernel - Re: [PATCH v2 5/6] clk: actions: Add Actions S500 SoC Reset Management Unit support

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Message-ID: <20200626135209.GC8333@Mani-XPS-13-9360>
Date:   Fri, 26 Jun 2020 19:22:09 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Cristian Ciocaltea <cristian.ciocaltea@...il.com>
Cc:     Stephen Boyd <sboyd@...nel.org>,
        Andreas Färber <afaerber@...e.de>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-actions@...ts.infradead.org
Subject: Re: [PATCH v2 5/6] clk: actions: Add Actions S500 SoC Reset
 Management Unit support

On Wed, Jun 24, 2020 at 08:47:56PM +0300, Cristian Ciocaltea wrote:
> Add Reset Management Unit (RMU) support for Actions Semi S500 SoC.
> 
> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...il.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Thanks,
Mani

> ---
> Changes in v2:
>  - Remove copyright as indicated by Stephen
> 
>  drivers/clk/actions/owl-s500.c | 78 ++++++++++++++++++++++++++++++++++
>  1 file changed, 78 insertions(+)
> 
> diff --git a/drivers/clk/actions/owl-s500.c b/drivers/clk/actions/owl-s500.c
> index 025a8f6d6482..61bb224f6330 100644
> --- a/drivers/clk/actions/owl-s500.c
> +++ b/drivers/clk/actions/owl-s500.c
> @@ -23,8 +23,10 @@
>  #include "owl-gate.h"
>  #include "owl-mux.h"
>  #include "owl-pll.h"
> +#include "owl-reset.h"
>  
>  #include <dt-bindings/clock/actions,s500-cmu.h>
> +#include <dt-bindings/reset/actions,s500-reset.h>
>  
>  #define CMU_COREPLL			(0x0000)
>  #define CMU_DEVPLL			(0x0004)
> @@ -497,20 +499,96 @@ static struct clk_hw_onecell_data s500_hw_clks = {
>  	.num = CLK_NR_CLKS,
>  };
>  
> +static const struct owl_reset_map s500_resets[] = {
> +	[RESET_DMAC]	= { CMU_DEVRST0, BIT(0) },
> +	[RESET_NORIF]	= { CMU_DEVRST0, BIT(1) },
> +	[RESET_DDR]	= { CMU_DEVRST0, BIT(2) },
> +	[RESET_NANDC]	= { CMU_DEVRST0, BIT(3) },
> +	[RESET_SD0]	= { CMU_DEVRST0, BIT(4) },
> +	[RESET_SD1]	= { CMU_DEVRST0, BIT(5) },
> +	[RESET_PCM1]	= { CMU_DEVRST0, BIT(6) },
> +	[RESET_DE]	= { CMU_DEVRST0, BIT(7) },
> +	[RESET_LCD]	= { CMU_DEVRST0, BIT(8) },
> +	[RESET_SD2]	= { CMU_DEVRST0, BIT(9) },
> +	[RESET_DSI]	= { CMU_DEVRST0, BIT(10) },
> +	[RESET_CSI]	= { CMU_DEVRST0, BIT(11) },
> +	[RESET_BISP]	= { CMU_DEVRST0, BIT(12) },
> +	[RESET_KEY]	= { CMU_DEVRST0, BIT(14) },
> +	[RESET_GPIO]	= { CMU_DEVRST0, BIT(15) },
> +	[RESET_AUDIO]	= { CMU_DEVRST0, BIT(17) },
> +	[RESET_PCM0]	= { CMU_DEVRST0, BIT(18) },
> +	[RESET_VDE]	= { CMU_DEVRST0, BIT(19) },
> +	[RESET_VCE]	= { CMU_DEVRST0, BIT(20) },
> +	[RESET_GPU3D]	= { CMU_DEVRST0, BIT(22) },
> +	[RESET_NIC301]	= { CMU_DEVRST0, BIT(23) },
> +	[RESET_LENS]	= { CMU_DEVRST0, BIT(26) },
> +	[RESET_PERIPHRESET] = { CMU_DEVRST0, BIT(27) },
> +	[RESET_USB2_0]	= { CMU_DEVRST1, BIT(0) },
> +	[RESET_TVOUT]	= { CMU_DEVRST1, BIT(1) },
> +	[RESET_HDMI]	= { CMU_DEVRST1, BIT(2) },
> +	[RESET_HDCP2TX]	= { CMU_DEVRST1, BIT(3) },
> +	[RESET_UART6]	= { CMU_DEVRST1, BIT(4) },
> +	[RESET_UART0]	= { CMU_DEVRST1, BIT(5) },
> +	[RESET_UART1]	= { CMU_DEVRST1, BIT(6) },
> +	[RESET_UART2]	= { CMU_DEVRST1, BIT(7) },
> +	[RESET_SPI0]	= { CMU_DEVRST1, BIT(8) },
> +	[RESET_SPI1]	= { CMU_DEVRST1, BIT(9) },
> +	[RESET_SPI2]	= { CMU_DEVRST1, BIT(10) },
> +	[RESET_SPI3]	= { CMU_DEVRST1, BIT(11) },
> +	[RESET_I2C0]	= { CMU_DEVRST1, BIT(12) },
> +	[RESET_I2C1]	= { CMU_DEVRST1, BIT(13) },
> +	[RESET_USB3]	= { CMU_DEVRST1, BIT(14) },
> +	[RESET_UART3]	= { CMU_DEVRST1, BIT(15) },
> +	[RESET_UART4]	= { CMU_DEVRST1, BIT(16) },
> +	[RESET_UART5]	= { CMU_DEVRST1, BIT(17) },
> +	[RESET_I2C2]	= { CMU_DEVRST1, BIT(18) },
> +	[RESET_I2C3]	= { CMU_DEVRST1, BIT(19) },
> +	[RESET_ETHERNET] = { CMU_DEVRST1, BIT(20) },
> +	[RESET_CHIPID]	= { CMU_DEVRST1, BIT(21) },
> +	[RESET_USB2_1]	= { CMU_DEVRST1, BIT(22) },
> +	[RESET_WD0RESET] = { CMU_DEVRST1, BIT(24) },
> +	[RESET_WD1RESET] = { CMU_DEVRST1, BIT(25) },
> +	[RESET_WD2RESET] = { CMU_DEVRST1, BIT(26) },
> +	[RESET_WD3RESET] = { CMU_DEVRST1, BIT(27) },
> +	[RESET_DBG0RESET] = { CMU_DEVRST1, BIT(28) },
> +	[RESET_DBG1RESET] = { CMU_DEVRST1, BIT(29) },
> +	[RESET_DBG2RESET] = { CMU_DEVRST1, BIT(30) },
> +	[RESET_DBG3RESET] = { CMU_DEVRST1, BIT(31) },
> +};
> +
>  static struct owl_clk_desc s500_clk_desc = {
>  	.clks	    = s500_clks,
>  	.num_clks   = ARRAY_SIZE(s500_clks),
>  
>  	.hw_clks    = &s500_hw_clks,
> +
> +	.resets     = s500_resets,
> +	.num_resets = ARRAY_SIZE(s500_resets),
>  };
>  
>  static int s500_clk_probe(struct platform_device *pdev)
>  {
>  	struct owl_clk_desc *desc;
> +	struct owl_reset *reset;
> +	int ret;
>  
>  	desc = &s500_clk_desc;
>  	owl_clk_regmap_init(pdev, desc);
>  
> +	reset = devm_kzalloc(&pdev->dev, sizeof(*reset), GFP_KERNEL);
> +	if (!reset)
> +		return -ENOMEM;
> +
> +	reset->rcdev.of_node = pdev->dev.of_node;
> +	reset->rcdev.ops = &owl_reset_ops;
> +	reset->rcdev.nr_resets = desc->num_resets;
> +	reset->reset_map = desc->resets;
> +	reset->regmap = desc->regmap;
> +
> +	ret = devm_reset_controller_register(&pdev->dev, &reset->rcdev);
> +	if (ret)
> +		dev_err(&pdev->dev, "Failed to register reset controller\n");
> +
>  	return owl_clk_probe(&pdev->dev, desc->hw_clks);
>  }
>  
> -- 
> 2.27.0
>