On 03/29/2019 11:20 AM, Mason Yang wrote:
> Add a driver for Renesas R-Car Gen3 RPC-IF MFD controller.
>
> Signed-off-by: Mason Yang <masonccyang@xxxxxxxxxxx>
[...]
> diff --git a/drivers/mfd/renesas-rpc.c b/drivers/mfd/renesas-rpc.c
> new file mode 100644
> index 0000000..c92bb74
> --- /dev/null
> +++ b/drivers/mfd/renesas-rpc.c
> @@ -0,0 +1,140 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Copyright (C) 2018 ~ 2019 Renesas Solutions Corp.
> +// Copyright (C) 2019 Macronix International Co., Ltd.
> +//
> +// R-Car Gen3 RPC-IF MFD driver
> +//
> +// Author:
> +// Mason Yang <masonccyang@xxxxxxxxxxx>
> +//
> +
> +#include <linux/mfd/renesas-rpc.h>
> +#include <linux/mfd/core.h>
> +
> +static const struct mfd_cell rpc_hf_ctlr = {
> + .name = "rpc-hf",
> + .of_compatible = "renesas,rcar-rpc-hf",
> +};
> +
> +static const struct mfd_cell rpc_spi_ctlr = {
> + .name = "rpc-spi",
> + .of_compatible = "renesas,rcar-rpc-spi",
> +};
> +
> +static const struct regmap_range rpc_mfd_volatile_ranges[] = {
> + regmap_reg_range(RPC_SMRDR0, RPC_SMRDR0),
regmap_reg_range((RPC_SMRDR0, RPC_SMRDR1), like Marek noted?
> + regmap_reg_range(RPC_SMWDR0, RPC_SMWDR0),
regmap_reg_range((RPC_SMWDR0, RPC_SMWDR1)?
> +static int rpc_mfd_probe(struct platform_device *pdev)
> +{
> + struct device_node *ctlr;
> + const struct mfd_cell *cell;
> + struct resource *res;
> + struct rpc_mfd *rpc;
> + int ret;
> +
> + ctlr = of_get_next_child(pdev->dev.of_node, NULL);
The child should be a CFI or JEDEC flash device, no virtual devices,
please.
[...]
> + rpc->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
> + if (IS_ERR(rpc->rstc))
> + return PTR_ERR(rpc->rstc);
> +
> + platform_set_drvdata(pdev, rpc);
> +
> + ret = devm_mfd_add_devices(&pdev->dev, -1, cell, 1, NULL, 0, NULL);
> +
> + return ret;
return devm_mfd_add_devices(&pdev->dev, -1, cell, 1, NULL, 0, NULL);
> +}
> +
> +static int rpc_mfd_remove(struct platform_device *pdev)
> +{
> + mfd_remove_devices(&pdev->dev);
Why, if you used devm_mfd_add_devices() in the probe method?
> + return 0;
> +}
[...]
> diff --git a/include/linux/mfd/renesas-rpc.h b/include/linux/mfd/renesas-rpc.h
> new file mode 100644
> index 0000000..209e64f1
> --- /dev/null
> +++ b/include/linux/mfd/renesas-rpc.h
> @@ -0,0 +1,154 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Copyright (C) 2018 ~ 2019 Renesas Solutions Corp.
> +// Copyright (C) 2019 Macronix International Co., Ltd.
> +//
> +// R-Car Gen3 RPC-IF MFD driver
> +//
> +// Author:
> +// Mason Yang <masonccyang@xxxxxxxxxxx>
> +//
> +
> +#ifndef __MFD_RENESAS_RPC_H
> +#define __MFD_RENESAS_RPC_H
> +
> +#include <linux/clk.h>
> +#include <linux/io.h>
> +#include <linux/log2.h>
> +#include <linux/iopoll.h>
> +#include <linux/module.h>
> +#include <linux/mtd/mtd.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/of.h>
> +#include <linux/regmap.h>
> +#include <linux/reset.h>
Is any of these #include's used by the header itself? I don't think so...
> +
> +#define RPC_CMNCR 0x0000 // R/W
Not sure we'd need the registers described in the public header after
we place the common RPC-IF code into the MFD driver. We'll see though...
[...]
MBR, Sergei
