On Wed, 29 Apr 2015, Shobhit Kumar wrote:
> On some Intel SoC platforms, the panel enable/disable signals are
> controlled by CRC PMIC. Add those control as a new GPIO in a lookup
> table for gpio-crystalcove chip during CRC driver load
>
> v2: Make the lookup table static (Thierry)
> Remove the lookup table during driver remove (Thierry)
>
> CC: Samuel Ortiz <sa...@linux.intel.com>
> Cc: Linus Walleij <linus.wall...@linaro.org>
> Cc: Alexandre Courbot <gnu...@gmail.com>
> Cc: Thierry Reding <thierry.red...@gmail.com>
> Signed-off-by: Shobhit Kumar <shobhit.ku...@intel.com>
> ---
> drivers/mfd/intel_soc_pmic_core.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
I have no idea what this stuff is, but it looks plausible.
For my own reference:
Acked-by: Lee Jones <lee.jo...@linaro.org>
> diff --git a/drivers/mfd/intel_soc_pmic_core.c
> b/drivers/mfd/intel_soc_pmic_core.c
> index 7b50b6b..f3d918e 100644
> --- a/drivers/mfd/intel_soc_pmic_core.c
> +++ b/drivers/mfd/intel_soc_pmic_core.c
> @@ -24,8 +24,19 @@
> #include <linux/acpi.h>
> #include <linux/regmap.h>
> #include <linux/mfd/intel_soc_pmic.h>
> +#include <linux/gpio/machine.h>
> #include "intel_soc_pmic_core.h"
>
> +/* Lookup table for the Panel Enable/Disable line as GPIO signals */
> +static struct gpiod_lookup_table panel_gpio_table = {
> + /* Intel GFX is consumer */
> + .dev_id = "0000:00:02.0",
> + .table = {
> + /* Panel EN/DISABLE */
> + GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH),
> + },
> +};
> +
> static int intel_soc_pmic_find_gpio_irq(struct device *dev)
> {
> struct gpio_desc *desc;
> @@ -85,6 +96,9 @@ static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
> if (ret)
> dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);
>
> + /* Add lookup table binding for Panel Control to the GPIO Chip */
> + gpiod_add_lookup_table(&panel_gpio_table);
> +
> ret = mfd_add_devices(dev, -1, config->cell_dev,
> config->n_cell_devs, NULL, 0,
> regmap_irq_get_domain(pmic->irq_chip_data));
> @@ -104,6 +118,9 @@ static int intel_soc_pmic_i2c_remove(struct i2c_client
> *i2c)
>
> regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
>
> + /* Remove lookup table for Panel Control from the GPIO Chip */
> + gpiod_remove_lookup_table(&panel_gpio_table);
> +
> 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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