On 1/15/21 6:13 AM, cy_huang wrote:
> From: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
>
> MT6360 not support for TCPC command to control source and sink.
does not
> Uses external 5V vbus regulator as the vbus source control.
>
Use
> Also adds the capability to report vsafe0v.
>
add
So far this driver works without regulator. Unless I am missing something,
this patch makes regulator support mandatory, meaning existing code will fail.
I am not sure if that is appropriate/acceptable. Can we be sure that this will
work for existing users of this driver ?
Thanks,
Guenter
> Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
> ---
> drivers/usb/typec/tcpm/tcpci_mt6360.c | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpci_mt6360.c b/drivers/usb/typec/tcpm/tcpci_mt6360.c
> index f1bd9e0..0edf4b6 100644
> --- a/drivers/usb/typec/tcpm/tcpci_mt6360.c
> +++ b/drivers/usb/typec/tcpm/tcpci_mt6360.c
> @@ -11,6 +11,7 @@
> #include <linux/of.h>
> #include <linux/platform_device.h>
> #include <linux/regmap.h>
> +#include <linux/regulator/consumer.h>
> #include <linux/usb/tcpm.h>
>
> #include "tcpci.h"
> @@ -36,6 +37,7 @@ struct mt6360_tcpc_info {
> struct tcpci_data tdata;
> struct tcpci *tcpci;
> struct device *dev;
> + struct regulator *vbus;
> int irq;
> };
>
> @@ -51,6 +53,27 @@ static inline int mt6360_tcpc_write16(struct regmap *regmap,
> return regmap_raw_write(regmap, reg, &val, sizeof(u16));
> }
>
> +static int mt6360_tcpc_set_vbus(struct tcpci *tcpci, struct tcpci_data *data, bool src, bool snk)
> +{
> + struct mt6360_tcpc_info *mti = container_of(data, struct mt6360_tcpc_info, tdata);
> + int ret;
> +
> + /* To correctly handle the already enabled vbus and disable its supply first */
> + if (regulator_is_enabled(mti->vbus)) {
> + ret = regulator_disable(mti->vbus);
> + if (ret)
> + return ret;
> + }
Is it really a good idea to disable vbus if it happens to be already enabled
and there is (another ?) request to enable it ?
> +
> + if (src) {
> + ret = regulator_enable(mti->vbus);
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> static int mt6360_tcpc_init(struct tcpci *tcpci, struct tcpci_data *tdata)
> {
> struct regmap *regmap = tdata->regmap;
> @@ -138,7 +161,13 @@ static int mt6360_tcpc_probe(struct platform_device *pdev)
> if (mti->irq < 0)
> return mti->irq;
>
> + mti->vbus = devm_regulator_get(&pdev->dev, "vbus");
> + if (IS_ERR(mti->vbus))
> + return PTR_ERR(mti->vbus);
> +
> mti->tdata.init = mt6360_tcpc_init;
> + mti->tdata.set_vbus = mt6360_tcpc_set_vbus;
> + mti->tdata.vbus_vsafe0v = 1;
> mti->tcpci = tcpci_register_port(&pdev->dev, &mti->tdata);
> if (IS_ERR(mti->tcpci)) {
> dev_err(&pdev->dev, "Failed to register tcpci port\n");
>
