From mboxrd@z Thu Jan 1 00:00:00 1970 From: Corentin Labbe Subject: Re: [RESEND PATCH] gnss: get serial speed from subdrivers Date: Wed, 8 May 2019 17:53:41 +0200 Message-ID: <20190508155341.GA1605@Red> References: <1557322788-10403-1-git-send-email-lollivier@baylibre.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1557322788-10403-1-git-send-email-lollivier@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org To: Loys Ollivier Cc: Johan Hovold , Matthias Brugger , Colin Ian King , linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: linux-mediatek@lists.infradead.org On Wed, May 08, 2019 at 03:39:48PM +0200, Loys Ollivier wrote: > The default serial speed was hardcoded in the code. > Rename current-speed to default-speed. > Add a function parameter that lets the subdrivers specify their > default speed. > If not specified fallback to the device-tree default-speed. > > Signed-off-by: Loys Ollivier > --- > Hello, > > This patch moves the currently hardcoded, default serial speed > to the subdrivers. > If the default speed is not specified by the subdriver then it is read > from the device tree. > > Cheers, > Loys > > drivers/gnss/mtk.c | 6 +++++- > drivers/gnss/serial.c | 21 +++++++++++++-------- > drivers/gnss/serial.h | 3 ++- > drivers/gnss/ubx.c | 3 ++- > 4 files changed, 22 insertions(+), 11 deletions(-) > > diff --git a/drivers/gnss/mtk.c b/drivers/gnss/mtk.c > index d1fc55560daf..a1a89f0cc75c 100644 > --- a/drivers/gnss/mtk.c > +++ b/drivers/gnss/mtk.c > @@ -16,6 +16,10 @@ > > #include "serial.h" > > +static uint serial_speed = 9600; /* Serial speed (baud rate) */ > +module_param(serial_speed, uint, 0644); > +MODULE_PARM_DESC(serial_speed, "Serial baud rate (bit/s), (default = 9600)"); > + > struct mtk_data { > struct regulator *vbackup; > struct regulator *vcc; > @@ -69,7 +73,7 @@ static int mtk_probe(struct serdev_device *serdev) > struct mtk_data *data; > int ret; > > - gserial = gnss_serial_allocate(serdev, sizeof(*data)); > + gserial = gnss_serial_allocate(serdev, sizeof(*data), serial_speed); > if (IS_ERR(gserial)) { > ret = PTR_ERR(gserial); > return ret; > diff --git a/drivers/gnss/serial.c b/drivers/gnss/serial.c > index def64b36d994..706fc5b46811 100644 > --- a/drivers/gnss/serial.c > +++ b/drivers/gnss/serial.c > @@ -103,17 +103,13 @@ static int gnss_serial_set_power(struct gnss_serial *gserial, > return gserial->ops->set_power(gserial, state); > } > > -/* > - * FIXME: need to provide subdriver defaults or separate dt parsing from > - * allocation. > - */ > static int gnss_serial_parse_dt(struct serdev_device *serdev) > { > struct gnss_serial *gserial = serdev_device_get_drvdata(serdev); > struct device_node *node = serdev->dev.of_node; > - u32 speed = 4800; > + uint speed; > > - of_property_read_u32(node, "current-speed", &speed); > + of_property_read_u32(node, "default-speed", &speed); Hello of_property_read_u32 use u32, so no reason to use uint instead. Regards