88PM800/860 device supports output of 32KHz low jitter XO clock
out on
- CLK32K3 - for 88pm800
- CLK32K2 - for 88pm860
Both devices share same register bit-field to configure this.
This patch adds support to enable this clock out, using DT property
"marvell,88pm800-32khz-xolj-out-en"
Since this configuration is controlled through DT property, it is
safe to put it as common code.
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@xxxxxxxxxx>
---
drivers/mfd/88pm800.c | 13 +++++++++++++
include/linux/mfd/88pm80x.h | 1 +
2 files changed, 14 insertions(+)
diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index 80a1bc1..8930fd8 100644
--- a/drivers/mfd/88pm800.c
+++ b/drivers/mfd/88pm800.c
@@ -526,6 +526,19 @@ static int pm800_init_config(struct pm80x_chip *chip, struct device_node *np)
int ret;
unsigned int val;
+ /* Enable 32Khz-out-3 low jitter XO_LJ = 1 in pm800
+ * Enable 32Khz-out-2 low jitter XO_LJ = 1 in pm860
+ * they are the same bit
+ */
+ if (of_property_read_bool(np, "marvell,88pm800-32khz-xolj-out-en")) {
+ ret = regmap_update_bits(chip->regmap,
+ PM800_LOW_POWER2,
+ PM800_XO_LJ_OUT_EN,
+ PM800_XO_LJ_OUT_EN);
+ if (ret)
+ goto error;
+ }
+
switch (chip->type) {
case CHIP_PM800:
case CHIP_PM805:
diff --git a/include/linux/mfd/88pm80x.h b/include/linux/mfd/88pm80x.h
index 2ef62af..fb916f1 100644
--- a/include/linux/mfd/88pm80x.h
+++ b/include/linux/mfd/88pm80x.h
@@ -88,6 +88,7 @@ enum {
/* Referance and low power registers */
#define PM800_LOW_POWER1 (0x20)
#define PM800_LOW_POWER2 (0x21)
+#define PM800_XO_LJ_OUT_EN BIT(5)
#define PM800_LOW_POWER_CONFIG3 (0x22)
#define PM800_LDOBK_FREEZE BIT(7)
--
1.9.1
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