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

On 04/29/2015 07:54 PM, Lee Jones wrote:

On Wed, 29 Apr 2015, Shobhit Kumar wrote:

quoted

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 <redacted>
Cc: Linus Walleij <redacted>
Cc: Alexandre Courbot <redacted>
Cc: Thierry Reding <redacted>
Signed-off-by: Shobhit Kumar <redacted>
---
 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.	

Regards
Shobhit

Acked-by: Lee Jones <redacted>

quoted

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;