From: Andreas Kemnade <andreas@kemnade.info>
To: lee@kernel.org, robh+dt@kernel.org,
krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
bcousson@baylibre.com, tony@atomide.com, andreas@kemnade.info,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-omap@vger.kernel.org
Subject: [PATCH v4 2/5] twl-core: add power off implementation for twl603x
Date: Sat, 17 Feb 2024 09:20:04 +0100 [thread overview]
Message-ID: <20240217082007.3238948-3-andreas@kemnade.info> (raw)
In-Reply-To: <20240217082007.3238948-1-andreas@kemnade.info>
If the system-power-controller property is there, enable power off.
Implementation is based on a Linux v3.0 vendor kernel.
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
drivers/mfd/twl-core.c | 28 ++++++++++++++++++++++++++++
include/linux/mfd/twl.h | 1 +
2 files changed, 29 insertions(+)
diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index 6e384a79e3418..c130ffef182f1 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -124,6 +124,11 @@
#define TWL6030_BASEADD_RSV 0x0000
#define TWL6030_BASEADD_ZERO 0x0000
+/* Some fields in TWL6030_PHOENIX_DEV_ON */
+#define TWL6030_APP_DEVOFF BIT(0)
+#define TWL6030_CON_DEVOFF BIT(1)
+#define TWL6030_MOD_DEVOFF BIT(2)
+
/* Few power values */
#define R_CFG_BOOT 0x05
@@ -687,6 +692,20 @@ static void twl_remove(struct i2c_client *client)
twl_priv->ready = false;
}
+static void twl6030_power_off(void)
+{
+ int err;
+ u8 val;
+
+ err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val, TWL6030_PHOENIX_DEV_ON);
+ if (err)
+ return;
+
+ val |= TWL6030_APP_DEVOFF | TWL6030_CON_DEVOFF | TWL6030_MOD_DEVOFF;
+ twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val, TWL6030_PHOENIX_DEV_ON);
+}
+
+
static struct of_dev_auxdata twl_auxdata_lookup[] = {
OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
{ /* sentinel */ },
@@ -852,6 +871,15 @@ twl_probe(struct i2c_client *client)
goto free;
}
+ if (twl_class_is_6030()) {
+ if (of_device_is_system_power_controller(node)) {
+ if (!pm_power_off)
+ pm_power_off = twl6030_power_off;
+ else
+ dev_warn(&client->dev, "Poweroff callback already assigned\n");
+ }
+ }
+
status = of_platform_populate(node, NULL, twl_auxdata_lookup,
&client->dev);
diff --git a/include/linux/mfd/twl.h b/include/linux/mfd/twl.h
index c062d91a67d92..85dc406173dba 100644
--- a/include/linux/mfd/twl.h
+++ b/include/linux/mfd/twl.h
@@ -461,6 +461,7 @@ static inline int twl6030_mmc_card_detect(struct device *dev, int slot)
#define TWL4030_PM_MASTER_GLOBAL_TST 0xb6
+#define TWL6030_PHOENIX_DEV_ON 0x06
/*----------------------------------------------------------------------*/
/* Power bus message definitions */
--
2.39.2
next prev parent reply other threads:[~2024-02-17 8:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-17 8:20 [PATCH v4 0/5] mfd: twl: system-power-controller Andreas Kemnade
2024-02-17 8:20 ` [PATCH v4 1/5] dt-bindings: mfd: ti,twl: Document system-power-controller Andreas Kemnade
2024-02-17 8:20 ` Andreas Kemnade [this message]
2024-02-17 8:20 ` [PATCH v4 3/5] ARM: dts: omap-embt2ws: system-power-controller for bt200 Andreas Kemnade
2024-02-17 8:20 ` [PATCH v4 4/5] ARM: dts: omap4-panda-common: Enable powering off the device Andreas Kemnade
2024-02-17 8:20 ` [PATCH v4 5/5] mfd: twl4030-power: accept standard property for power controller Andreas Kemnade
2024-02-23 16:12 ` (subset) [PATCH v4 0/5] mfd: twl: system-power-controller Lee Jones
2024-02-26 12:11 ` Tony Lindgren
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