Re: [PATCH 1/4] mfd: 88pm800: add device tree support
From: Vaibhav Hiremath
Date: Tue Jun 16 2015 - 03:52:32 EST
On Monday 01 June 2015 02:08 PM, Lee Jones wrote:
On Sat, 30 May 2015, Vaibhav Hiremath wrote:
Thanks for your review. and sorry for delayed response.
Add DT support to the 88pm800 driver along with below properties
- marvell,88pm800-irq-write-clear :
Idicates whether interrupt status is cleared by write
Also, creates the DT binding text file,
Documentation/devicetree/bindings/mfd/88pm800.txt
Signed-off-by: Chao Xie <chao.xie@xxxxxxxxxxx>
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@xxxxxxxxxx>
---
Documentation/devicetree/bindings/mfd/88pm800.txt | 57 +++++++++++++++++++++++
drivers/mfd/88pm800.c | 39 ++++++++++++++++
These should be submitted separately.
Ok, will separate it in next version.
2 files changed, 96 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/88pm800.txt
diff --git a/Documentation/devicetree/bindings/mfd/88pm800.txt b/Documentation/devicetree/bindings/mfd/88pm800.txt
new file mode 100644
index 0000000..094951b
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/88pm800.txt
@@ -0,0 +1,57 @@
+* Marvell 88PM800 Power Management IC
+
+Required parent device properties:
+- compatible : "marvell,88pm800"
+- reg : the I2C slave address for the 88pm800 chip
+- interrupts : IRQ line for the 88pm800 chip
+- interrupt-controller: describes the 88pm800 as an interrupt controller
+- #interrupt-cells : should be 1.
+ - The cell is the 88pm800 local IRQ number
+
+Optional parent device properties:
+- marvell,88pm800-irq-write-clr: indicates whether interrupt status is cleared by write
Drop the device name. These bindings should be as generic as possible.
OK, how about simply
"mfd-irq_clr_on_write"
Also describe what the absence of the property means.
Ok.
+88pm800 consists of a large and varied group of sub-devices:
3?
I have explicitly mentioned in note that more device list will follow.
I just wanted to add entries as and when we add/enable driver support.
+Device Supply Names Description
+------ ------------ -----------
+88pm80x-onkey : : On key
+88pm80x-rtc : : RTC
+88pm80x : : Regulators
Surely regulators is 88pm80x-regulator, no?
did not understand what change is expected here.
+Note: More device list will follow
+
+Example:
+
+ pmic: 88pm800@30 {
+ compatible = "marvell,88pm800";
+ reg = <0x30>;
+ interrupts = <0 77 0x4>;
Please use the #defines in include/dt-bindings/
Ok.
+ interrupt-parent = <&gic>;
+ interrupt-controller;
+ #interrupt-cells = <1>;
+
+ marvell,88pm800-irq-write-clr;
+
+ regulators {
+ compatible = "marvell,88pm80x-regulator";
+
+ buck1a: BUCK1A {
+ regulator-compatible = "88PM800-BUCK1A";
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ ldo1: LDO1 {
+ regulator-compatible = "88PM800-LDO1";
+ regulator-min-microvolt = <1700000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ };
'\n' here.
+ rtc {
+ compatible = "marvell,88pm80x-rtc";
+ };
+ };
diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index 841717a..06ee058 100644
--- a/drivers/mfd/88pm800.c
+++ b/drivers/mfd/88pm800.c
@@ -27,6 +27,7 @@
#include <linux/mfd/core.h>
#include <linux/mfd/88pm80x.h>
#include <linux/slab.h>
+#include <linux/of_device.h>
/* Interrupt Registers */
#define PM800_INT_STATUS1 (0x05)
@@ -121,6 +122,11 @@ static const struct i2c_device_id pm80x_id_table[] = {
};
MODULE_DEVICE_TABLE(i2c, pm80x_id_table);
+static const struct of_device_id pm80x_of_match_table[] = {
+ { .compatible = "marvell,88pm800", },
+ {},
+};
+
static struct resource rtc_resources[] = {
{
.name = "88pm80x-rtc",
@@ -133,6 +139,7 @@ static struct resource rtc_resources[] = {
static struct mfd_cell rtc_devs[] = {
{
.name = "88pm80x-rtc",
+ .of_compatible = "marvell,88pm80x-rtc",
.num_resources = ARRAY_SIZE(rtc_resources),
.resources = &rtc_resources[0],
.id = -1,
@@ -151,6 +158,7 @@ static struct resource onkey_resources[] = {
static const struct mfd_cell onkey_devs[] = {
{
.name = "88pm80x-onkey",
+ .of_compatible = "marvell,88pm80x-onkey",
.num_resources = 1,
.resources = &onkey_resources[0],
.id = -1,
@@ -160,6 +168,7 @@ static const struct mfd_cell onkey_devs[] = {
static const struct mfd_cell regulator_devs[] = {
{
.name = "88pm80x-regulator",
+ .of_compatible = "marvell,88pm80x-regulator",
.id = -1,
},
};
@@ -538,14 +547,43 @@ out:
return ret;
}
+static int pm800_probe_dt(struct device_node *np,
+ struct device *dev,
Do you even use dev?
Yeah, not used. Will remove it.
+ struct pm80x_platform_data *pdata)
+{
+ pdata->irq_mode =
+ of_property_read_bool(np, "marvell,88pm800-irq-write-clear");
You write a new function for this?
Just felt clean this way.
I am ok to merge it in parent function.
+ return 0;
+}
+
+
Superfluous '\n'.
static int pm800_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret = 0;
struct pm80x_chip *chip;
struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct device_node *node = client->dev.of_node;
It's more common to use 'np'.
ok.
struct pm80x_subchip *subchip;
+ if (!pdata && !node) {
+ dev_err(&client->dev,
+ "pm80x requires platform data or of_node\n");
+ return -EINVAL;
+ }
+
+ if (!pdata) {
+ pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(&client->dev, "failed to allocaate memory\n");
+ return -ENOMEM;
+ }
+ ret = pm800_probe_dt(node, &client->dev, pdata);
+ if (ret)
+ return ret;
+ }
All this for a single attribute? Please simplify.
Ok, let me kill probe_dt function here.
Thanks,
Vaibhav
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