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SubjectRe: [PATCH v10 4/7] Bluetooth: hci_qca: Add wrapper functions for setting UART speed
On Tue, Jul 24, 2018 at 12:32:36PM +0530, Balakrishna Godavarthi wrote:
> Hi Matthias,
>
> On 2018-07-23 23:26, Matthias Kaehlcke wrote:
> > On Fri, Jul 20, 2018 at 07:02:40PM +0530, Balakrishna Godavarthi wrote:
> > > In function qca_setup, we set initial and operating speeds for
> > > Qualcomm
> > > Bluetooth SoC's. This block of code is common across different
> > > Qualcomm Bluetooth SoC's. Instead of duplicating the code, created
> > > a wrapper function to set the speeds. So that future coming SoC's
> > > can use these wrapper functions to set speeds.
> > >
> > > Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
> > > Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
> > > ---
> > > drivers/bluetooth/hci_qca.c | 93
> > > ++++++++++++++++++++++++++++---------
> > > 1 file changed, 70 insertions(+), 23 deletions(-)
> > >
> > > diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> > > index 5f1c0a8fd5cd..5f8a74d65bec 100644
> > > --- a/drivers/bluetooth/hci_qca.c
> > > +++ b/drivers/bluetooth/hci_qca.c
> > > @@ -119,6 +119,11 @@ struct qca_data {
> > > u64 votes_off;
> > > };
> > >
> > > +enum qca_speed_type {
> > > + QCA_INIT_SPEED = 1,
> > > + QCA_OPER_SPEED
> > > +};
> > > +
> > > struct qca_serdev {
> > > struct hci_uart serdev_hu;
> > > struct gpio_desc *bt_en;
> > > @@ -923,6 +928,61 @@ static inline void host_set_baudrate(struct
> > > hci_uart *hu, unsigned int speed)
> > > hci_uart_set_baudrate(hu, speed);
> > > }
> > >
> > > +static unsigned int qca_get_speed(struct hci_uart *hu,
> > > + enum qca_speed_type speed_type)
> > > +{
> > > + unsigned int speed = 0;
> > > +
> > > + if (speed_type == QCA_INIT_SPEED) {
> > > + if (hu->init_speed)
> > > + speed = hu->init_speed;
> > > + else if (hu->proto->init_speed)
> > > + speed = hu->proto->init_speed;
> > > + } else {
> > > + if (hu->oper_speed)
> > > + speed = hu->oper_speed;
> > > + else if (hu->proto->oper_speed)
> > > + speed = hu->proto->oper_speed;
> > > + }
> > > +
> > > + return speed;
> > > +}
> > > +
> > > +static int qca_check_speeds(struct hci_uart *hu)
> > > +{
> > > + if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
> > > + !qca_get_speed(hu, QCA_OPER_SPEED))
> > > + return -EINVAL;
> >
> > You changed this from:
> >
> > /* One or the other speeds should be non zero. */
> > if (!qca_get_speed(hu, QCA_INIT_SPEED) &&
> > !qca_get_speed(hu, QCA_OPER_SPEED))
> > return -EINVAL;
> >
> > There is no entry in the change log. What is the reason for this
> > change?
>
> [Bala] : My bad i missed to add the log,as the above if for ROME chip,
> having INIT or OPER speed is fine.

Ok, thanks for the clarification, I recall this was discussed earlier.

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