Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-10 06:01:57 +00:00
Code Issues Packages Projects Releases Wiki Activity

leds: leds-lp5569: Enable chip after chip configuration

Browse Source 
Documentation say that clock internal config needs to be set BEFORE chip
is enabled. Align code to this and move the CHIP enable after the CHIP
is configured.

While at it also make use of STATUS reg and check when STARTUP is
completed instead of sleep for 1-2 ms.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://lore.kernel.org/r/20240712004556.15601-3-ansuelsmth@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Christian Marangi 2024-07-12 02:45:54 +02:00 committed by Lee Jones
parent 2a498d626d
commit b0eed39762
1 changed files with 11 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/leds/leds-lp5569.c
View File

@ -8,6 +8,7 @@
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/iopoll.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
@ -92,6 +93,8 @@
#define LP5569_ENG2_MUX_ADDR 0xd0
#define LP5569_ENG3_MUX_ADDR 0xe0
#define LP5569_STARTUP_SLEEP 500
#define LEDn_STATUS_FAULT(n, status) ((status) >> (n) & BIT(0))
#define LP5569_DEFAULT_CONFIG \
@ -169,14 +172,7 @@ out:
static int lp5569_post_init_device(struct lp55xx_chip *chip)
{
int ret;
int val;
ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE);
if (ret)
return ret;
/* Chip startup time is 500 us, 1 - 2 ms gives some margin */
usleep_range(1000, 2000);
u8 val;
val = LP5569_DEFAULT_CONFIG;
val |= FIELD_PREP(LP5569_CP_MODE_MASK, chip->pdata->charge_pump_mode);
@ -199,6 +195,13 @@ static int lp5569_post_init_device(struct lp55xx_chip *chip)
return ret;
}
ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE);
if (ret)
return ret;
read_poll_timeout(lp55xx_read, ret, !(val & LP5569_STARTUP_BUSY),
LP5569_STARTUP_SLEEP, LP5569_STARTUP_SLEEP * 10, false,
chip, LP5569_REG_STATUS, &val);
return lp5569_init_program_engine(chip);
}