diff mbox series

[2/2] regulator: rt5739: Add DID check and compatible for rt5733

Message ID 1687942037-14652-3-git-send-email-cy_huang@richtek.com
State New
Headers
Series Add support for RT5733 |

Commit Message

ChiYuan Huang June 28, 2023, 8:47 a.m. UTC 
  From: ChiYuan Huang <cy_huang@richtek.com>

Add compatible and use DID to check rt5733.

The only difference bwtween rt5733 and rt5739 is the output range and
voltage step. These two chips can be distinguished from the DIE id.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---
 drivers/regulator/rt5739.c | 49 +++++++++++++++++++++++++++++++-------
 1 file changed, 41 insertions(+), 8 deletions(-)

Comments

Mark Brown June 28, 2023, 11:47 a.m. UTC | #1 
On Wed, Jun 28, 2023 at 04:47:17PM +0800, cy_huang@richtek.com wrote:

> +	if (did == RT5733_CHIPDIE_ID) {
> +		min_uV = RT5733_VOLT_MINUV;
> +		max_uV = RT5733_VOLT_MAXUV;
> +		step_uV = RT5733_VOLT_STPUV;
> +	} else {
> +		min_uV = RT5739_VOLT_MINUV;
> +		max_uV = RT5739_VOLT_MAXUV;
> +		step_uV = RT5739_VOLT_STPUV;
> +	}

It would be better to write these as switch statements so if any more
variants turn up they can be added more easily.
ChiYuan Huang June 29, 2023, 1:27 a.m. UTC | #2 
On Wed, Jun 28, 2023 at 12:47:50PM +0100, Mark Brown wrote:
> On Wed, Jun 28, 2023 at 04:47:17PM +0800, cy_huang@richtek.com wrote:
> 
> > +	if (did == RT5733_CHIPDIE_ID) {
> > +		min_uV = RT5733_VOLT_MINUV;
> > +		max_uV = RT5733_VOLT_MAXUV;
> > +		step_uV = RT5733_VOLT_STPUV;
> > +	} else {
> > +		min_uV = RT5739_VOLT_MINUV;
> > +		max_uV = RT5739_VOLT_MAXUV;
> > +		step_uV = RT5739_VOLT_STPUV;
> > +	}
> 
> It would be better to write these as switch statements so if any more
> variants turn up they can be added more easily.

Since the IC difference is only voltage range and step, They can be retrieved from the
regulator description.

To check DID here may not a good coding.

I may rewrite it as below
  max_uV = desc->min_uV + desc->uV_step * (desc->n_voltages - 1);

And put a switch case for DID check in 'init_regulator_desc'.

Is it better?
diff mbox series

Patch

diff --git a/drivers/regulator/rt5739.c b/drivers/regulator/rt5739.c
index 74fc5bf6d87e..c930ea27e51f 100644
--- a/drivers/regulator/rt5739.c
+++ b/drivers/regulator/rt5739.c
@@ -31,10 +31,17 @@ 
 #define RT5739_MODEVSEL1_MASK	BIT(1)
 #define RT5739_MODEVSEL0_MASK	BIT(0)
 #define RT5739_VID_MASK		GENMASK(7, 5)
+#define RT5739_DID_MASK		GENMASK(3, 0)
 #define RT5739_ACTD_MASK	BIT(7)
 #define RT5739_ENVSEL1_MASK	BIT(1)
 #define RT5739_ENVSEL0_MASK	BIT(0)
 
+#define RT5733_CHIPDIE_ID	0x1
+#define RT5733_VOLT_MINUV	270000
+#define RT5733_VOLT_MAXUV	1401250
+#define RT5733_VOLT_STPUV	6250
+#define RT5733_N_VOLTS		182
+
 #define RT5739_VOLT_MINUV	300000
 #define RT5739_VOLT_MAXUV	1300000
 #define RT5739_VOLT_STPUV	5000
@@ -92,9 +99,26 @@  static int rt5739_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 {
 	const struct regulator_desc *desc = rdev->desc;
 	struct regmap *regmap = rdev_get_regmap(rdev);
-	unsigned int reg, vsel;
+	unsigned int did, reg, vsel;
+	int min_uV, max_uV, step_uV, ret;
+
+	ret = regmap_read(regmap, RT5739_REG_ID1, &did);
+	if (ret)
+		return ret;
+
+	did &= RT5739_DID_MASK;
+
+	if (did == RT5733_CHIPDIE_ID) {
+		min_uV = RT5733_VOLT_MINUV;
+		max_uV = RT5733_VOLT_MAXUV;
+		step_uV = RT5733_VOLT_STPUV;
+	} else {
+		min_uV = RT5739_VOLT_MINUV;
+		max_uV = RT5739_VOLT_MAXUV;
+		step_uV = RT5739_VOLT_STPUV;
+	}
 
-	if (uV < RT5739_VOLT_MINUV || uV > RT5739_VOLT_MAXUV)
+	if (uV < min_uV || uV > max_uV)
 		return -EINVAL;
 
 	if (desc->vsel_reg == RT5739_REG_NSEL0)
@@ -102,7 +126,7 @@  static int rt5739_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 	else
 		reg = RT5739_REG_NSEL0;
 
-	vsel = (uV - RT5739_VOLT_MINUV) / RT5739_VOLT_STPUV;
+	vsel = (uV - min_uV) / step_uV;
 	return regmap_write(regmap, reg, vsel);
 }
 
@@ -189,15 +213,12 @@  static unsigned int rt5739_of_map_mode(unsigned int mode)
 }
 
 static void rt5739_init_regulator_desc(struct regulator_desc *desc,
-				       bool vsel_active_high)
+				       bool vsel_active_high, u8 did)
 {
 	/* Fixed */
 	desc->name = "rt5739-regulator";
 	desc->owner = THIS_MODULE;
 	desc->ops = &rt5739_regulator_ops;
-	desc->n_voltages = RT5739_N_VOLTS;
-	desc->min_uV = RT5739_VOLT_MINUV;
-	desc->uV_step = RT5739_VOLT_STPUV;
 	desc->vsel_mask = RT5739_VSEL_MASK;
 	desc->enable_reg = RT5739_REG_CNTL2;
 	desc->active_discharge_reg = RT5739_REG_CNTL1;
@@ -213,6 +234,17 @@  static void rt5739_init_regulator_desc(struct regulator_desc *desc,
 		desc->vsel_reg = RT5739_REG_NSEL0;
 		desc->enable_mask = RT5739_ENVSEL0_MASK;
 	}
+
+	/* Assigned by CHIPDIE ID */
+	if (did == RT5733_CHIPDIE_ID) {
+		desc->n_voltages = RT5733_N_VOLTS;
+		desc->min_uV = RT5733_VOLT_MINUV;
+		desc->uV_step = RT5733_VOLT_STPUV;
+	} else {
+		desc->n_voltages = RT5739_N_VOLTS;
+		desc->min_uV = RT5739_VOLT_MINUV;
+		desc->uV_step = RT5739_VOLT_STPUV;
+	}
 }
 
 static const struct regmap_config rt5739_regmap_config = {
@@ -258,7 +290,7 @@  static int rt5739_probe(struct i2c_client *i2c)
 
 	vsel_acth = device_property_read_bool(dev, "richtek,vsel-active-high");
 
-	rt5739_init_regulator_desc(desc, vsel_acth);
+	rt5739_init_regulator_desc(desc, vsel_acth, vid & RT5739_DID_MASK);
 
 	cfg.dev = dev;
 	cfg.of_node = dev_of_node(dev);
@@ -271,6 +303,7 @@  static int rt5739_probe(struct i2c_client *i2c)
 }
 
 static const struct of_device_id rt5739_device_table[] = {
+	{ .compatible = "richtek,rt5733" },
 	{ .compatible = "richtek,rt5739" },
 	{ /* sentinel */ }
 };