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    Subject[PATCH 5/8] drivers/mfd: ADD PWM lookup table for CRC PMIC based PWM
    Date
    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@linux.intel.com>
    Cc: Linus Walleij <linus.walleij@linaro.org>
    Cc: Alexandre Courbot <gnurou@gmail.com>
    Cc: Thierry Reding <thierry.reding@gmail.com>
    Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
    ---
    drivers/mfd/intel_soc_pmic_core.c | 12 ++++++++++++
    1 file changed, 12 insertions(+)

    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;
    --
    2.1.0


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