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

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Date:	Tue, 5 May 2015 11:42:17 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Shobhit Kumar <shobhit.kumar@...ux.intel.com>
Cc:	Shobhit Kumar <shobhit.kumar@...el.com>,
	linux-pwm <linux-pwm@...r.kernel.org>,
	Jani Nikula <jani.nikula@...el.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Alexandre Courbot <gnurou@...il.com>,
	Povilas Staniulis <wdmonster@...il.com>,
	intel-gfx <intel-gfx@...ts.freedesktop.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	linux-gpio <linux-gpio@...r.kernel.org>,
	Daniel Vetter <daniel.vetter@...el.com>
Subject: Re: [PATCH 5/8] drivers/mfd: ADD PWM lookup table for CRC PMIC based
 PWM

On Tue, 05 May 2015, Shobhit Kumar wrote:

> On 04/29/2015 07:54 PM, Lee Jones wrote:
> > 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?
> 
> There are some dependencies on the look up table remove functionality in
> earlier patches, so I think 3/8 can go in only after 1/8. Similarly 5/8
> can go only after 2/8. Rest all can be independent.	

Taking patches 'in order' is tough to coordinate and takes a very long
time.  The best thing to do is have all of the patches taken in via a
single tree at the same time.

> > 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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