From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kim, Milo" Subject: Re: [PATCH v2 1/4] regulator: lp872x: Remove warning about invalid DVS GPIO Date: Fri, 12 Feb 2016 09:14:20 +0900 Message-ID: <56BD23DC.30901@ti.com> References: <1454697741-8687-1-git-send-email-contact@paulk.fr> <1454697741-8687-2-git-send-email-contact@paulk.fr> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1454697741-8687-2-git-send-email-contact@paulk.fr> Sender: linux-kernel-owner@vger.kernel.org To: Paul Kocialkowski Cc: linux-kernel@vger.kernel.org, Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Russell King , =?UTF-8?Q?Beno=c3=aet_Cousson?= , Tony Lindgren , Liam Girdwood , Mark Brown , Javier Martinez Canillas , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org List-Id: devicetree@vger.kernel.org On 2/6/2016 3:42 AM, Paul Kocialkowski wrote: > Some devices don't hook the DVS pin to a GPIO but to ground or VCC. > In those cases, it is not a problem to have no DVS GPIO provided, as the current > code will already switch to software-only DVS selection: > > When the DVS GPIO is invalid, lp872x_init_dvs jumps to the set_default_dvs_mode > label, which instructs the chip not to use the DVS pin at all and do it all in > software instead (by clearing the LP8720_EXT_DVS_M bit in the > LP872X_GENERAL_CFG register). > > That is reflected later in the code, when setting the bucks (the DVS pin only > applies to the bucks) by checking for the LP8720_EXT_DVS_M bit on the > LP872X_GENERAL_CFG register (in lp872x_select_buck_vout_addr) to decide whether > to use software or hardware DVS selection. > > Thus, there is no need to print a warning when the DVS GPIO is invalid. > > Signed-off-by: Paul Kocialkowski Acked-by: Milo Kim > --- > drivers/regulator/lp872x.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/drivers/regulator/lp872x.c b/drivers/regulator/lp872x.c > index 19d7584..21c49d8 100644 > --- a/drivers/regulator/lp872x.c > +++ b/drivers/regulator/lp872x.c > @@ -738,10 +738,8 @@ static int lp872x_init_dvs(struct lp872x *lp) > goto set_default_dvs_mode; > > gpio = dvs->gpio; > - if (!gpio_is_valid(gpio)) { > - dev_warn(lp->dev, "invalid gpio: %d\n", gpio); > + if (!gpio_is_valid(gpio)) > goto set_default_dvs_mode; > - } > > pinstate = dvs->init_state; > ret = devm_gpio_request_one(lp->dev, gpio, pinstate, "LP872X DVS"); >