[PATCH 3/8] mfd: intel_soc_pmic_core: Add lookup table for Panel Control as GPIO signal

Shobhit Kumar
2015-05-05T09:36:05Z

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)

v3: Correct the subject line (Lee jones)

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>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
---
drivers/mfd/intel_soc_pmic_core.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

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;
--
2.1.0