linux-kernel - Re: [PATCH v2 5/6] clk: stm32f469: Add QSPI clock

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Date:   Wed, 19 Oct 2016 13:32:28 -0700
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     gabriel.fernandez@...com
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Michael Turquette <mturquette@...libre.com>,
        Nicolas Pitre <nico@...aro.org>, Arnd Bergmann <arnd@...db.de>,
        daniel.thompson@...aro.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, ludovic.barre@...com,
        olivier.bideau@...com, amelie.delaunay@...com
Subject: Re: [PATCH v2 5/6] clk: stm32f469: Add QSPI clock

On 10/14, gabriel.fernandez@...com wrote:
> @@ -532,10 +618,42 @@ static struct clk_hw *stm32_register_cclk(struct device *dev, const char *name,
>  	{ 0 },
>  };
>  
> +struct stm32f4_clk_data {
> +	const struct stm32f4_gate_data *gates_data;
> +	const u64 *gates_map;
> +	int gates_num;
> +};
> @@ -549,6 +667,19 @@ static void __init stm32f4_rcc_init(struct device_node *np)
>  		goto fail;
>  	}
>  
> +	match = of_match_node(stm32f4_of_match, np);
> +	if (WARN_ON(!match))
> +		return;
> +
> +	data = match->data;
> +
> +	clks = kmalloc_array(data->gates_num + END_PRIMARY_CLK,
> +			sizeof(struct clk_hw *), GFP_KERNEL);

sizeof(*clks)?

> +	if (!clks)
> +		goto fail;
> +
> +	stm32f4_gate_map = data->gates_map;
> +
>  	hse_clk = of_clk_get_parent_name(np, 0);
>  
>  	clk_register_fixed_rate_with_accuracy(NULL, "hsi", NULL, 0,
> @@ -581,11 +712,15 @@ static void __init stm32f4_rcc_init(struct device_node *np)
>  	clks[FCLK] = clk_hw_register_fixed_factor(NULL, "fclk", "ahb_div",
>  					       0, 1, 1);
>  
> -	for (n = 0; n < ARRAY_SIZE(stm32f4_gates); n++) {
> -		const struct stm32f4_gate_data *gd = &stm32f4_gates[n];
> -		unsigned int secondary =
> -		    8 * (gd->offset - STM32F4_RCC_AHB1ENR) + gd->bit_idx;
> -		int idx = stm32f4_rcc_lookup_clk_idx(0, secondary);
> +	for (n = 0; n < data->gates_num; n++) {
> +		const struct stm32f4_gate_data *gd;
> +		unsigned int secondary;
> +		int idx;
> +
> +		gd = (struct stm32f4_gate_data *) &data->gates_data[n];

Why do we cast here? Get rid of const? Perhaps the struct
shouldn't have const on the member instead?

> +		secondary = 8 * (gd->offset - STM32F4_RCC_AHB1ENR) +
> +			gd->bit_idx;
> +		idx = stm32f4_rcc_lookup_clk_idx(0, secondary);
>  
>  		if (idx < 0)

-- 
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