linux-kernel - Re: [PATCH 5/8] drivers/mfd: ADD PWM lookup table for CRC PMIC based PWM

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Message-ID: <20150429142451.GS9169@x1>
Date:	Wed, 29 Apr 2015 15:24:51 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Shobhit Kumar <shobhit.kumar@...el.com>
Cc:	intel-gfx <intel-gfx@...ts.freedesktop.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-gpio <linux-gpio@...r.kernel.org>,
	linux-pwm <linux-pwm@...r.kernel.org>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Daniel Vetter <daniel.vetter@...el.com>,
	David Airlie <airlied@...ux.ie>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Jani Nikula <jani.nikula@...el.com>,
	Povilas Staniulis <wdmonster@...il.com>,
	Chih-Wei Huang <cwhuang@...roid-x86.org>
Subject: Re: [PATCH 5/8] drivers/mfd: ADD PWM lookup table for CRC PMIC based
 PWM

On Wed, 29 Apr 2015, Shobhit Kumar wrote:

> On some BYT PLatform the PWM is controlled using CRC PMIC. Add a lookup
> entry for the same to be used by the consumer (Intel GFX)
> 
> v2: Remove the lookup table on driver unload (Thierry)
> 
> CC: Samuel Ortiz <sameo@...ux.intel.com>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Cc: Alexandre Courbot <gnurou@...il.com>
> Cc: Thierry Reding <thierry.reding@...il.com>
> Signed-off-by: Shobhit Kumar <shobhit.kumar@...el.com>
> ---
>  drivers/mfd/intel_soc_pmic_core.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)

How do you expect this set to be managed?

Acked-by: Lee Jones <lee.jones@...aro.org>

> diff --git a/drivers/mfd/intel_soc_pmic_core.c b/drivers/mfd/intel_soc_pmic_core.c
> index f3d918e..a00ddd9 100644
> --- a/drivers/mfd/intel_soc_pmic_core.c
> +++ b/drivers/mfd/intel_soc_pmic_core.c
> @@ -25,6 +25,7 @@
>  #include <linux/regmap.h>
>  #include <linux/mfd/intel_soc_pmic.h>
>  #include <linux/gpio/machine.h>
> +#include <linux/pwm.h>
>  #include "intel_soc_pmic_core.h"
>  
>  /* Lookup table for the Panel Enable/Disable line as GPIO signals */
> @@ -37,6 +38,11 @@ static struct gpiod_lookup_table panel_gpio_table = {
>  	},
>  };
>  
> +/* PWM consumed by the Intel GFX */
> +static struct pwm_lookup crc_pwm_lookup[] = {
> +	PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_backlight", 0, PWM_POLARITY_NORMAL),
> +};
> +
>  static int intel_soc_pmic_find_gpio_irq(struct device *dev)
>  {
>  	struct gpio_desc *desc;
> @@ -99,6 +105,9 @@ static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
>  	/* Add lookup table binding for Panel Control to the GPIO Chip */
>  	gpiod_add_lookup_table(&panel_gpio_table);
>  
> +	/* Add lookup table for crc-pwm */
> +	pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
> +
>  	ret = mfd_add_devices(dev, -1, config->cell_dev,
>  			      config->n_cell_devs, NULL, 0,
>  			      regmap_irq_get_domain(pmic->irq_chip_data));
> @@ -121,6 +130,9 @@ static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c)
>  	/* Remove lookup table for Panel Control from the GPIO Chip */
>  	gpiod_remove_lookup_table(&panel_gpio_table);
>  
> +	/* remove crc-pwm lookup table */
> +	pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
> +
>  	mfd_remove_devices(&i2c->dev);
>  
>  	return 0;

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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