Message-ID: <52FD2280.2020807@synaptics.com>
Date:	Thu, 13 Feb 2014 11:52:32 -0800
From:	Christopher Heiny <cheiny@...aptics.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	Andrew Duggan <aduggan@...aptics.com>,
	Vincent Huang <vincent.huang@...synaptics.com>,
	Vivian Ly <vly@...aptics.com>,
	Daniel Rosenberg <daniel.rosenberg@...aptics.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Courtney Cavin <courtney.cavin@...ymobile.com>,
	Linux Input <linux-input@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 09/11] Input: synaptics-rmi4 - consolidate memory allocations
 in F01

On 02/12/2014 09:27 PM, Dmitry Torokhov wrote:
> Let's allocate interrupt mask together with the main structure and combine
> rmi_f01_alloc_memory, rmi_f01_initialize and rmi_f01_probe into single
> function.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

Signed-off-by: Christopher Heiny <cheiny@...aptics.com>

> ---
>   drivers/input/rmi4/rmi_f01.c | 86 ++++++++++++++++----------------------------
>   1 file changed, 30 insertions(+), 56 deletions(-)
>
> diff --git a/drivers/input/rmi4/rmi_f01.c b/drivers/input/rmi4/rmi_f01.c
> index a2f05bc..0e21004 100644
> --- a/drivers/input/rmi4/rmi_f01.c
> +++ b/drivers/input/rmi4/rmi_f01.c
> @@ -130,37 +130,15 @@ struct f01_data {
>   	u16 doze_interval_addr;
>   	u16 wakeup_threshold_addr;
>   	u16 doze_holdoff_addr;
> -	int irq_count;
> -	int num_of_irq_regs;
>
>   #ifdef CONFIG_PM_SLEEP
>   	bool suspended;
>   	bool old_nosleep;
>   #endif
> -};
> -
> -static int rmi_f01_alloc_memory(struct rmi_function *fn,
> -				int num_of_irq_regs)
> -{
> -	struct f01_data *f01;
>
> -	f01 = devm_kzalloc(&fn->dev, sizeof(struct f01_data), GFP_KERNEL);
> -	if (!f01) {
> -		dev_err(&fn->dev, "Failed to allocate fn_01_data.\n");
> -		return -ENOMEM;
> -	}
> -
> -	f01->device_control.interrupt_enable = devm_kzalloc(&fn->dev,
> -			sizeof(u8) * (num_of_irq_regs),
> -			GFP_KERNEL);
> -	if (!f01->device_control.interrupt_enable) {
> -		dev_err(&fn->dev, "Failed to allocate interrupt enable.\n");
> -		return -ENOMEM;
> -	}
> -	fn->data = f01;
> -
> -	return 0;
> -}
> +	unsigned int num_of_irq_regs;
> +	u8 interrupt_enable[];
> +};
>
>   static int rmi_f01_read_properties(struct rmi_device *rmi_dev,
>   				   u16 query_base_addr,
> @@ -202,16 +180,28 @@ static int rmi_f01_read_properties(struct rmi_device *rmi_dev,
>   	return 0;
>   }
>
> -static int rmi_f01_initialize(struct rmi_function *fn)
> +static int rmi_f01_probe(struct rmi_function *fn)
>   {
> -	u8 temp;
> -	int error;
>   	struct rmi_device *rmi_dev = fn->rmi_dev;
>   	struct rmi_driver_data *driver_data = dev_get_drvdata(&rmi_dev->dev);
> -	struct f01_data *f01 = fn->data;
>   	const struct rmi_device_platform_data *pdata = to_rmi_platform_data(rmi_dev);
> +	struct f01_data *f01;
> +	size_t f01_size;
> +	int error;
>   	u16 ctrl_base_addr = fn->fd.control_base_addr;
>   	u8 device_status;
> +	u8 temp;
> +
> +	f01_size = sizeof(struct f01_data) +
> +				sizeof(u8) * driver_data->num_of_irq_regs;
> +	f01 = devm_kzalloc(&fn->dev, f01_size, GFP_KERNEL);
> +	if (!f01) {
> +		dev_err(&fn->dev, "Failed to allocate fn01_data.\n");
> +		return -ENOMEM;
> +	}
> +
> +	f01->num_of_irq_regs = driver_data->num_of_irq_regs;
> +	f01->device_control.interrupt_enable = f01->interrupt_enable;
>
>   	/*
>   	 * Set the configured bit and (optionally) other important stuff
> @@ -257,12 +247,11 @@ static int rmi_f01_initialize(struct rmi_function *fn)
>   		return error;
>   	}
>
> -	f01->irq_count = driver_data->irq_count;
> -	f01->num_of_irq_regs = driver_data->num_of_irq_regs;
> -	ctrl_base_addr += sizeof(u8);
> -
> +	/* Advance to interrupt control registers */
> +	ctrl_base_addr++;
>   	f01->interrupt_enable_addr = ctrl_base_addr;
> -	error = rmi_read_block(rmi_dev, ctrl_base_addr,
> +
> +	error = rmi_read_block(rmi_dev, f01->interrupt_enable_addr,
>   				f01->device_control.interrupt_enable,
>   				sizeof(u8) * (f01->num_of_irq_regs));
>   	if (error) {
> @@ -272,9 +261,7 @@ static int rmi_f01_initialize(struct rmi_function *fn)
>   		return error;
>   	}
>
> -	ctrl_base_addr += f01->num_of_irq_regs;
> -
> -	/* dummy read in order to clear irqs */
> +	/* Dummy read in order to clear irqs */
>   	error = rmi_read(rmi_dev, fn->fd.data_base_addr + 1, &temp);
>   	if (error < 0) {
>   		dev_err(&fn->dev, "Failed to read Interrupt Status.\n");
> @@ -287,11 +274,13 @@ static int rmi_f01_initialize(struct rmi_function *fn)
>   		dev_err(&fn->dev, "Failed to read F01 properties.\n");
>   		return error;
>   	}
> +
>   	dev_info(&fn->dev, "found RMI device, manufacturer: %s, product: %s\n",
> -		 f01->properties.manufacturer_id == 1 ?
> -							"Synaptics" : "unknown",
> +		 f01->properties.manufacturer_id == 1 ? "Synaptics" : "unknown",
>   		 f01->properties.product_id);
>
> +	ctrl_base_addr += f01->num_of_irq_regs;
> +
>   	/* read control register */
>   	if (f01->properties.has_adjustable_doze) {
>   		f01->doze_interval_addr = ctrl_base_addr;
> @@ -365,6 +354,8 @@ static int rmi_f01_initialize(struct rmi_function *fn)
>   		return -EINVAL;
>   	}
>
> +	fn->data = f01;
> +
>   	return 0;
>   }
>
> @@ -424,23 +415,6 @@ static int rmi_f01_config(struct rmi_function *fn)
>   	return 0;
>   }
>
> -static int rmi_f01_probe(struct rmi_function *fn)
> -{
> -	struct rmi_driver_data *driver_data =
> -			dev_get_drvdata(&fn->rmi_dev->dev);
> -	int error;
> -
> -	error = rmi_f01_alloc_memory(fn, driver_data->num_of_irq_regs);
> -	if (error)
> -		return error;
> -
> -	error = rmi_f01_initialize(fn);
> -	if (error)
> -		return error;
> -
> -	return 0;
> -}
> -
>   #ifdef CONFIG_PM_SLEEP
>   static int rmi_f01_suspend(struct device *dev)
>   {
>


-- 

Christopher Heiny
Senior Staff Firmware Engineer
Synaptics Incorporated
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