Tero Kristo <t-kri...@ti.com> writes:
> This is needed for SMPS regulators, which use the OMAP voltage
> processor for voltage get/set functions instead of the normal I2C
> channel. For this purpose, regulator_init_data->driver_data contents
> are expanded, it is now a struct which contains function pointers
> for the set/get voltage operations, a data pointer for these, and
> the previously used features bitmask.
>
> Signed-off-by: Tero Kristo <t-kri...@ti.com>
> Cc: Mark Brown <broo...@opensource.wolfsonmicro.com>
> Cc: Liam Girdwood <l...@ti.com>
> Cc: Samuel Ortiz <sa...@linux.intel.com>
Seems to me like the get/set override should be more generic (part of
regulator core) instead of TWL specific?
Otherwise, whenever someone hooks up a non-TWL regulator to an OMAP and
is using HW control (via VC/VP), they'll have to duplicate all of this
stuff in their regulator driver?
Kevin
> ---
> drivers/mfd/twl-core.c | 16 ++++++++++++++-
> drivers/regulator/twl-regulator.c | 39 ++++++++++++++++++++++++++++++++----
> include/linux/i2c/twl.h | 7 ++++++
> 3 files changed, 56 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
> index 01ecfee..009f62b 100644
> --- a/drivers/mfd/twl-core.c
> +++ b/drivers/mfd/twl-core.c
> @@ -609,6 +609,8 @@ add_regulator_linked(int num, struct regulator_init_data
> *pdata,
> unsigned num_consumers, unsigned long features)
> {
> unsigned sub_chip_id;
> + struct twl_regulator_driver_data drv_data;
> +
> /* regulator framework demands init_data ... */
> if (!pdata)
> return NULL;
> @@ -618,7 +620,19 @@ add_regulator_linked(int num, struct regulator_init_data
> *pdata,
> pdata->num_consumer_supplies = num_consumers;
> }
>
> - pdata->driver_data = (void *)features;
> + if (pdata->driver_data) {
> + /* If we have existing drv_data, just add the flags */
> + struct twl_regulator_driver_data *tmp;
> + tmp = pdata->driver_data;
> + tmp->features |= features;
> + } else {
> + /* add new driver data struct, used only during init */
> + drv_data.features = features;
> + drv_data.set_voltage = NULL;
> + drv_data.get_voltage = NULL;
> + drv_data.data = NULL;
> + pdata->driver_data = &drv_data;
> + }
>
> /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */
> sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
> diff --git a/drivers/regulator/twl-regulator.c
> b/drivers/regulator/twl-regulator.c
> index 11cc308..29eda40 100644
> --- a/drivers/regulator/twl-regulator.c
> +++ b/drivers/regulator/twl-regulator.c
> @@ -58,6 +58,16 @@ struct twlreg_info {
>
> /* chip specific features */
> unsigned long features;
> +
> + /*
> + * optional override functions for voltage set/get
> + * these are currently only used for SMPS regulators
> + */
> + int (*get_voltage)(void *data);
> + int (*set_voltage)(void *data, int min_uV);
> +
> + /* data passed from board for external get/set voltage */
> + void *data;
> };
>
>
> @@ -522,15 +532,25 @@ twl4030smps_set_voltage(struct regulator_dev *rdev, int
> min_uV, int max_uV,
> struct twlreg_info *info = rdev_get_drvdata(rdev);
> int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
>
> - twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS_4030,
> - vsel);
> + if (info->set_voltage) {
> + return info->set_voltage(info->data, min_uV);
> + } else {
> + twlreg_write(info, TWL_MODULE_PM_RECEIVER,
> + VREG_VOLTAGE_SMPS_4030, vsel);
> + }
> +
> return 0;
> }
>
> static int twl4030smps_get_voltage(struct regulator_dev *rdev)
> {
> struct twlreg_info *info = rdev_get_drvdata(rdev);
> - int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
> + int vsel;
> +
> + if (info->get_voltage)
> + return info->get_voltage(info->data);
> +
> + vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
> VREG_VOLTAGE_SMPS_4030);
>
> return vsel * 12500 + 600000;
> @@ -1052,6 +1072,7 @@ static int __devinit twlreg_probe(struct
> platform_device *pdev)
> struct regulator_init_data *initdata;
> struct regulation_constraints *c;
> struct regulator_dev *rdev;
> + struct twl_regulator_driver_data *drvdata;
>
> for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) {
> if (twl_regs[i].desc.id != pdev->id)
> @@ -1066,8 +1087,16 @@ static int __devinit twlreg_probe(struct
> platform_device *pdev)
> if (!initdata)
> return -EINVAL;
>
> - /* copy the features into regulator data */
> - info->features = (unsigned long)initdata->driver_data;
> + drvdata = initdata->driver_data;
> +
> + if (!drvdata)
> + return -EINVAL;
> +
> + /* copy the driver data into regulator data */
> + info->features = drvdata->features;
> + info->data = drvdata->data;
> + info->set_voltage = drvdata->set_voltage;
> + info->get_voltage = drvdata->get_voltage;
>
> /* Constrain board-specific capabilities according to what
> * this driver and the chip itself can actually do.
> diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
> index 114c0f6..7157e88 100644
> --- a/include/linux/i2c/twl.h
> +++ b/include/linux/i2c/twl.h
> @@ -747,6 +747,13 @@ struct twl4030_platform_data {
> struct regulator_init_data *vio6025;
> };
>
> +struct twl_regulator_driver_data {
> + int (*set_voltage)(void *data, int min_uV);
> + int (*get_voltage)(void *data);
> + void *data;
> + unsigned long features;
> +};
> +
> /*----------------------------------------------------------------------*/
>
> int twl4030_sih_setup(int module);
--
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