Re: [PATCH 1/8] Regulator: Add TPS65023 regulator driver

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Hi,

Adding linux-i2c to the loop.

On Fri, Aug 07, 2009 at 05:25:26PM +0200, ext Anuj Aggarwal wrote:
> +static inline int tps_65023_read_reg(struct tps_pmic *tps, u8 reg, u8 *val)
> +{
> +       int status;
> +
> +       status = i2c_smbus_read_byte_data(tps->client, reg);
> +       *val = status;
> +       if (status < 0)
> +               return status;
> +       return 0;
> +}

make this:

static inline int tps_65023_read_reg(struct tps_pmic *tps, u8 reg)
{
       return i2c_smbus_read_byte_data(tps->client, reg);
}

ad change the users likewise.

> +static inline int tps_65023_write_reg(struct tps_pmic *tps, u8 reg, u8 val)
> +{
> +       return i2c_smbus_write_byte_data(tps->client, reg, val);
> +}
> +
> +static int tps_65023_set_bits(struct tps_pmic *tps, u8 reg, u8 mask)
> +{
> +       u8 data;
> +       int err;
> +
> +       err = tps_65023_read_reg(tps, reg, &data);

then this would become:

	data = tps_65023_read_reg(tps, reg);
	if (data < 0) {
> +       if (err) {
> +               pr_err("Read from reg 0x%x failed\n", reg);

this should use dev_dbg(); you have a device struct inside the
i2c_client, use it.

> +               return err;
> +       }
> +
> +       data |= mask;
> +
> +       return tps_65023_write_reg(tps, reg, data);
> +}
> +
> +static int tps_65023_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask)
> +{
> +       u8 data;
> +       int err;
> +
> +       err = tps_65023_read_reg(tps, reg, &data);
> +       if (err) {

ditto

> +               pr_err("Read from reg 0x%x failed\n", reg);

ditto

> +               return err;
> +       }
> +
> +       data &= ~mask;
> +
> +       return tps_65023_write_reg(tps, reg, data);
> +}
> +
> +static int tps65023_dcdc_is_enabled(struct regulator_dev *dev)
> +{
> +       unsigned char reg_ctrl;
> +       struct tps_pmic *tps = rdev_get_drvdata(dev);
> +       int dcdc = rdev_get_id(dev);
> +       int ret;
> +       u8 shift;
> +
> +       if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
> +               return -EINVAL;
> +
> +       shift = TPS65023_NUM_REGULATOR - dcdc;
> +       ret = tps_65023_read_reg(tps, TPS65023_REG_REG_CTRL, &reg_ctrl);
> +
> +       if (ret == 0) {
> +               reg_ctrl &= (1 << shift);
> +               return reg_ctrl ? 1 : 0;
> +       } else
> +               return ret;
> +}
> +
> +static int tps65023_ldo_is_enabled(struct regulator_dev *dev)
> +{
> +       struct tps_pmic *tps = rdev_get_drvdata(dev);
> +       int ldo = rdev_get_id(dev);
> +       int ret;
> +       u8 shift;
> +       unsigned char reg_ctrl;
> +
> +       if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
> +               return -EINVAL;
> +
> +       shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
> +       ret = tps_65023_read_reg(tps, TPS65023_REG_REG_CTRL, &reg_ctrl);
> +
> +       if (ret == 0) {
> +               reg_ctrl &= (1 << shift);
> +               return reg_ctrl ? 1 : 0;
> +       } else
> +               return ret;
> +}
> +
> +static int tps65023_dcdc_enable(struct regulator_dev *dev)
> +{
> +       struct tps_pmic *tps = rdev_get_drvdata(dev);
> +       int dcdc = rdev_get_id(dev);
> +       u8 shift;
> +
> +       if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
> +               return -EINVAL;
> +
> +       shift = TPS65023_NUM_REGULATOR - dcdc;
> +       return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
> +}
> +
> +static int tps65023_dcdc_disable(struct regulator_dev *dev)
> +{
> +       struct tps_pmic *tps = rdev_get_drvdata(dev);
> +       int dcdc = rdev_get_id(dev);
> +       u8 shift;
> +
> +       if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
> +               return -EINVAL;
> +
> +       shift = TPS65023_NUM_REGULATOR - dcdc;
> +       return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
> +}
> +
> +static int tps65023_ldo_enable(struct regulator_dev *dev)
> +{
> +       struct tps_pmic *tps = rdev_get_drvdata(dev);
> +       int ldo = rdev_get_id(dev);
> +       u8 shift;
> +
> +       if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
> +               return -EINVAL;
> +
> +       shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
> +       return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
> +}
> +
> +static int tps65023_ldo_disable(struct regulator_dev *dev)
> +{
> +       struct tps_pmic *tps = rdev_get_drvdata(dev);
> +       int ldo = rdev_get_id(dev);
> +       u8 shift;
> +
> +       if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
> +               return -EINVAL;
> +
> +       shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
> +       return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
> +}
> +
> +static int tps65023_dcdc_get_voltage(struct regulator_dev *dev)
> +{
> +       unsigned char reg_ctrl;
> +       struct tps_pmic *tps = rdev_get_drvdata(dev);
> +       int dcdc = rdev_get_id(dev);
> +       int ret;
> +
> +       if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
> +               return -EINVAL;
> +
> +       if (dcdc == TPS65023_DCDC_1) {
> +               ret = tps_65023_read_reg(tps, TPS65023_REG_DEF_CORE, &reg_ctrl);
> +               if (ret < 0)
> +                       return ret;
> +               reg_ctrl &= (tps->info[dcdc]->table_len - 1);
> +               return tps->info[dcdc]->table[reg_ctrl] * 1000;
> +       } else
> +               return tps->info[dcdc]->min_uV;
> +}
> +
> +static int tps65023_dcdc_set_voltage(struct regulator_dev *dev,
> +                               int min_uV, int max_uV)
> +{
> +       struct tps_pmic *tps = rdev_get_drvdata(dev);
> +       int dcdc = rdev_get_id(dev);
> +       int vsel;
> +
> +       if (dcdc != TPS65023_DCDC_1)
> +               return -EINVAL;
> +
> +       if (min_uV < tps->info[dcdc]->min_uV
> +                       || min_uV > tps->info[dcdc]->max_uV)
> +               return -EINVAL;
> +       if (max_uV < tps->info[dcdc]->min_uV
> +                       || max_uV > tps->info[dcdc]->max_uV)
> +               return -EINVAL;
> +
> +       for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
> +               int mV = tps->info[dcdc]->table[vsel];
> +               int uV = mV * 1000;
> +
> +               /* Break at the first in-range value */
> +               if (min_uV <= uV && uV <= max_uV)
> +                       break;
> +       }
> +
> +       /* write to the register */
> +       return tps_65023_write_reg(tps, TPS65023_REG_DEF_CORE, vsel);
> +}
> +
> +static int tps65023_ldo_get_voltage(struct regulator_dev *dev)
> +{
> +       unsigned char reg_ctrl;
> +       struct tps_pmic *tps = rdev_get_drvdata(dev);
> +       int ldo = rdev_get_id(dev);
> +       int ret;
> +
> +       if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
> +               return -EINVAL;
> +
> +       ret = tps_65023_read_reg(tps, TPS65023_REG_LDO_CTRL, &reg_ctrl);
> +       if (ret < 0)
> +               return ret;
> +
> +       reg_ctrl >>= (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1));
> +       reg_ctrl &= (tps->info[ldo]->table_len - 1);
> +       return tps->info[ldo]->table[reg_ctrl] * 1000;
> +}
> +
> +static int tps65023_ldo_set_voltage(struct regulator_dev *dev,
> +                               int min_uV, int max_uV)
> +{
> +       struct tps_pmic *tps = rdev_get_drvdata(dev);
> +       int ldo = rdev_get_id(dev);
> +       int vsel;
> +       int ret;
> +       unsigned char reg_ctrl;
> +
> +       if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
> +               return -EINVAL;
> +
> +       if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
> +               return -EINVAL;
> +       if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
> +               return -EINVAL;
> +
> +       for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
> +               int mV = tps->info[ldo]->table[vsel];
> +               int uV = mV * 1000;
> +
> +               /* Break at the first in-range value */
> +               if (min_uV <= uV && uV <= max_uV)
> +                       break;
> +       }
> +
> +       ret = tps_65023_read_reg(tps, TPS65023_REG_LDO_CTRL, &reg_ctrl);
> +
> +       if (ret < 0)
> +               return ret;
> +
> +       reg_ctrl &= TPS65023_LDO_CTRL_LDOx_MASK(ldo - TPS65023_LDO_1);
> +       reg_ctrl |=
> +               (vsel << (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1)));
> +       return tps_65023_write_reg(tps, TPS65023_REG_LDO_CTRL, reg_ctrl);
> +}
> +
> +/* Operations permitted on VDCDCx */
> +static struct regulator_ops tps65023_dcdc_ops = {
> +       .is_enabled = tps65023_dcdc_is_enabled,
> +       .enable = tps65023_dcdc_enable,
> +       .disable = tps65023_dcdc_disable,
> +       .get_voltage = tps65023_dcdc_get_voltage,
> +       .set_voltage = tps65023_dcdc_set_voltage,
> +};
> +
> +/* Operations permitted on LDOx */
> +static struct regulator_ops tps65023_ldo_ops = {
> +       .is_enabled = tps65023_ldo_is_enabled,
> +       .enable = tps65023_ldo_enable,
> +       .disable = tps65023_ldo_disable,
> +       .get_voltage = tps65023_ldo_get_voltage,
> +       .set_voltage = tps65023_ldo_set_voltage,
> +};
> +
> +static
> +int tps_65023_probe(struct i2c_client *client, const struct i2c_device_id *id)
> +{
> +       static int desc_id;
> +       const struct tps_info *info = (void *)id->driver_data;
> +       struct regulator_init_data *init_data;
> +       struct regulator_dev *rdev;
> +       struct tps_pmic *tps;
> +       int i;
> +
> +       if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
> +               return -EIO;
> +
> +       /**
> +        * init_data points to array of regulator_init structures
> +        * coming from the board-evm file.
> +        */
> +       init_data = client->dev.platform_data;
> +
> +       if (!init_data)
> +               return -EIO;
> +
> +       tps = kzalloc(sizeof(*tps), GFP_KERNEL);
> +       if (!tps)
> +               return -ENOMEM;
> +
> +       tps->client = client;
> +
> +       for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
> +               /* Store regulator specific information */
> +               tps->info[i] = info;
> +
> +               tps->desc[i].name = info->name;
> +               tps->desc[i].id = desc_id++;
> +               tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
> +                                       &tps65023_ldo_ops : &tps65023_dcdc_ops);
> +               tps->desc[i].type = REGULATOR_VOLTAGE;
> +               tps->desc[i].owner = THIS_MODULE;
> +
> +               /* Register the regulators */
> +               rdev = regulator_register(&tps->desc[i], &client->dev,
> +                                                               init_data, tps);
> +               if (IS_ERR(rdev)) {
> +                       dev_err(&client->dev, "failed to register %s\n",
> +                               id->name);
> +                       kfree(tps);
> +                       return PTR_ERR(rdev);
> +               }
> +
> +               /* Save regulator for cleanup */
> +               tps->rdev[i] = rdev;
> +       }
> +
> +       i2c_set_clientdata(client, tps);
> +
> +       return 0;
> +}
> +
> +/**
> + * tps_65023_remove - TPS65023 driver i2c remove handler
> + * @client: i2c driver client device structure
> + *
> + * Unregister TPS driver as an i2c client device driver
> + */
> +static int __devexit tps_65023_remove(struct i2c_client *client)
> +{
> +       struct tps_pmic *tps = i2c_get_clientdata(client);
> +       int i;
> +
> +       for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
> +               regulator_unregister(tps->rdev[i]);
> +
> +       tps->client = NULL;
> +
> +       /* clear the client data in i2c */
> +       i2c_set_clientdata(client, NULL);
> +       kfree(tps);
> +
> +       return 0;
> +}
> +
> +/* Supported voltage values for regulators */
> +static const u16 VDCDC1_VSEL_table[] = {
> +       800, 825, 850, 875,
> +       900, 925, 950, 975,
> +       1000, 1025, 1050, 1075,
> +       1100, 1125, 1150, 1175,
> +       1200, 1225, 1250, 1275,
> +       1300, 1325, 1350, 1375,
> +       1400, 1425, 1450, 1475,
> +       1500, 1525, 1550, 1600,
> +};
> +
> +static const u16 LDO1_VSEL_table[] = {
> +       1000, 1100, 1300, 1800,
> +       2200, 2600, 2800, 3150,
> +};
> +
> +static const u16 LDO2_VSEL_table[] = {
> +       1050, 1200, 1300, 1800,
> +       2500, 2800, 3000, 3300,
> +};
> +
> +static const struct tps_info tps65023_regs[] = {
> +       {
> +       .name = "VDCDC1",
> +       .min_uV =  800000,
> +       .max_uV = 1600000,
> +       .fixed = 0,
> +       .table_len = ARRAY_SIZE(VDCDC1_VSEL_table),
> +       .table = VDCDC1_VSEL_table,
> +       },
> +       {
> +       .name = "VDCDC2",
> +       .min_uV =  3300000,
> +       .max_uV = 3300000,
> +       .fixed = 1,
> +       .table_len = 0,
> +       },
> +       {
> +       .name = "VDCDC3",
> +       .min_uV =  1800000,
> +       .max_uV = 1800000,
> +       .fixed = 1,
> +       .table_len = 0,
> +       },
> +       {
> +       .name = "LDO1",
> +       .min_uV = 1000000,
> +       .max_uV = 3150000,
> +       .fixed = 0,
> +       .table_len = ARRAY_SIZE(LDO1_VSEL_table),
> +       .table = LDO1_VSEL_table,
> +       },
> +       {
> +       .name = "LDO2",
> +       .min_uV = 1050000,
> +       .max_uV = 3300000,
> +       .fixed = 0,
> +       .table_len = ARRAY_SIZE(LDO2_VSEL_table),
> +       .table = LDO2_VSEL_table,
> +       },
> +};
> +
> +static const struct i2c_device_id tps_65023_id = {
> +       .name = "tps65023",
> +       .driver_data = (unsigned long) &tps65023_regs[0],
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, tps_65023_id);
> +
> +static struct i2c_driver tps_65023_i2c_driver = {
> +       .driver = {
> +               .name = "tps_65023_pwr",
> +               .owner = THIS_MODULE,
> +       },
> +       .probe = tps_65023_probe,
> +       .remove = __devexit_p(tps_65023_remove),
> +       .id_table = &tps_65023_id,
> +};
> +
> +/**
> + * tps_65023_init
> + *
> + * Module init function
> + */
> +static int __init tps_65023_init(void)
> +{
> +       return i2c_add_driver(&tps_65023_i2c_driver);
> +}
> +subsys_initcall(tps_65023_init);
> +
> +/**
> + * tps_65023_cleanup
> + *
> + * Module exit function
> + */
> +static void __exit tps_65023_cleanup(void)
> +{
> +       i2c_del_driver(&tps_65023_i2c_driver);
> +}
> +module_exit(tps_65023_cleanup);
> +
> +MODULE_AUTHOR("Texas Instruments");
> +MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
> +MODULE_LICENSE("GPLv2");
> --
> 1.6.2.4
> 
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