Re: [PATCH v6 5/6] clk: hi6220: Clock driver support for Hisilicon hi6220 SoC

[Stephen Boyd]

On 05/16, Bintian Wang wrote:
> @@ -94,18 +106,23 @@ struct clk *hisi_register_clkgate_sep(struct device *, const char *,
>  				const char *, unsigned long,
>  				void __iomem *, u8,
>  				u8, spinlock_t *);
> +struct clk *hi6220_register_clkdiv(struct device *dev, const char *name,
> +	const char *parent_name, unsigned long flags, void __iomem *reg,
> +	u8 shift, u8 width, u32 mask_bit, spinlock_t *lock);
>  
> -struct hisi_clock_data __init *hisi_clk_init(struct device_node *, int);
> -void __init hisi_clk_register_fixed_rate(struct hisi_fixed_rate_clock *,
> +struct hisi_clock_data *hisi_clk_init(struct device_node *, int);
> +void hisi_clk_register_fixed_rate(struct hisi_fixed_rate_clock *,
>  					int, struct hisi_clock_data *);
> -void __init hisi_clk_register_fixed_factor(struct hisi_fixed_factor_clock *,
> +void hisi_clk_register_fixed_factor(struct hisi_fixed_factor_clock *,
>  					int, struct hisi_clock_data *);
> -void __init hisi_clk_register_mux(struct hisi_mux_clock *, int,
> +void hisi_clk_register_mux(struct hisi_mux_clock *, int,
>  				struct hisi_clock_data *);
> -void __init hisi_clk_register_divider(struct hisi_divider_clock *,
> +void hisi_clk_register_divider(struct hisi_divider_clock *,
>  				int, struct hisi_clock_data *);
> -void __init hisi_clk_register_gate(struct hisi_gate_clock *,
> +void hisi_clk_register_gate(struct hisi_gate_clock *,
> +					int, struct hisi_clock_data *);
> +void hisi_clk_register_gate_sep(struct hisi_gate_clock *,
>  					int, struct hisi_clock_data *);
> -void __init hisi_clk_register_gate_sep(struct hisi_gate_clock *,
> +void hi6220_clk_register_divider(struct hi6220_divider_clock *,
>  					int, struct hisi_clock_data *);

Please don't do the mass __init removal in this patch. Do it in a
separate patch.

>  #endif	/* __HISI_CLK_H */
> diff --git a/drivers/clk/hisilicon/clkdivider-hi6220.c b/drivers/clk/hisilicon/clkdivider-hi6220.c
> new file mode 100644
> index 0000000..bc85ef6
> --- /dev/null
> +++ b/drivers/clk/hisilicon/clkdivider-hi6220.c
> @@ -0,0 +1,157 @@
> +/*
> + * Hisilicon hi6220 SoC divider clock driver
> + *
> + * Copyright (c) 2015 Hisilicon Limited.
> + *
> + * Author: Bintian Wang <bintian.wang@xxxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/clk-provider.h>
> +#include <linux/slab.h>
> +#include <linux/io.h>
> +#include <linux/err.h>

#include <linux/spinlock.h> ?

> +
> +#define div_mask(width)	((1 << (width)) - 1)
> +
[..]
> +
> +struct clk *hi6220_register_clkdiv(struct device *dev, const char *name,
> +	const char *parent_name, unsigned long flags, void __iomem *reg,
> +	u8 shift, u8 width, u32 mask_bit, spinlock_t *lock)
> +{
> +	struct hi6220_clk_divider *div;
> +	struct clk *clk;
> +	struct clk_init_data init;
> +	struct clk_div_table *table;
> +	u32 max_div, min_div;
> +	int i;
> +
> +	/* allocate the divider */
> +	div = kzalloc(sizeof(struct hi6220_clk_divider), GFP_KERNEL);

nitpick: Use sizeof(*div) please.

> +	if (!div)
> +		return ERR_PTR(-ENOMEM);
> +
> +	/* Init the divider table */
> +	max_div = div_mask(width) + 1;
> +	min_div = 1;
> +
> +	table = kzalloc(sizeof(struct clk_div_table) * (max_div + 1),

And kcalloc() here please

> +			GFP_KERNEL);
> +	if (!table) {
> +		kfree(div);
> +		return ERR_PTR(-ENOMEM);
> +	}
> +
> +	for (i = 0; i < max_div; i++) {
> +		table[i].div = min_div + i;
> +		table[i].val = table[i].div - 1;
> +	}
> +
> +	init.name = name;
> +	init.ops = &hi6220_clkdiv_ops;
> +	init.flags = flags;
> +	init.parent_names = parent_name ? &parent_name : NULL;
> +	init.num_parents = parent_name ? 1 : 0;
> +
> +	/* struct hi6220_clk_divider assignments */
> +	div->reg = reg;
> +	div->shift = shift;
> +	div->width = width;
> +	div->mask = mask_bit ? BIT(mask_bit) : 0;
> +	div->lock = lock;
> +	div->hw.init = &init;
> +	div->table = table;
> +
> +	/* register the clock */
> +	clk = clk_register(dev, &div->hw);
> +

Drop the newline here.

> +	if (IS_ERR(clk)) {
> +		kfree(table);
> +		kfree(div);
> +	}
> +
> +	return clk;
> +}

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