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Mon, 13 Mar 2023 04:49:53 -0700 (PDT) Date: Mon, 13 Mar 2023 12:49:52 +0100 From: Markus Schneider-Pargmann To: Matthias Brugger Cc: Rob Herring , Krzysztof Kozlowski , Chun-Jie Chen , AngeloGioacchino Del Regno , Fabien Parent , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: Re: [PATCH 3/8] soc: mediatek: pm-domains: Create bus protection operation functions Message-ID: <20230313114952.b6o4qngyyd7eup6d@blmsp> References: <20230105170735.1637416-1-msp@baylibre.com> <20230105170735.1637416-4-msp@baylibre.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230313_044956_797361_2EB1C976 X-CRM114-Status: GOOD ( 23.45 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Hi Matthias, On Fri, Feb 03, 2023 at 01:32:11PM +0100, Matthias Brugger wrote: > > > On 05/01/2023 18:07, Markus Schneider-Pargmann wrote: > > Separate the register access used for bus protection enable/disable into > > their own functions. These will be used later for WAY_EN bits. > > > > Signed-off-by: Markus Schneider-Pargmann > > --- > > drivers/soc/mediatek/mtk-pm-domains.c | 68 +++++++++++++++------------ > > 1 file changed, 39 insertions(+), 29 deletions(-) > > > > diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c > > index 4333cd297405..999e1f6c86b0 100644 > > --- a/drivers/soc/mediatek/mtk-pm-domains.c > > +++ b/drivers/soc/mediatek/mtk-pm-domains.c > > @@ -117,26 +117,50 @@ static int scpsys_sram_disable(struct scpsys_domain *pd) > > MTK_POLL_TIMEOUT); > > } > > +static int scpsys_bus_protect_clear(const struct scpsys_bus_prot_data *bpd, > > + struct regmap *regmap) > > +{ > > + u32 val; > > + u32 sta_mask = bpd->bus_prot_sta_mask; > > + > > + if (bpd->bus_prot_reg_update) > > + regmap_clear_bits(regmap, bpd->bus_prot_clr, bpd->bus_prot_set_clr_mask); > > + else > > + regmap_write(regmap, bpd->bus_prot_clr, bpd->bus_prot_set_clr_mask); > > + > > + if (bpd->ignore_clr_ack) > > + return 0; > > + > > + return regmap_read_poll_timeout(regmap, bpd->bus_prot_sta, > > + val, !(val & sta_mask), > > + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); > > +} > > + > > NIT: please move this function below > static int scpsys_bus_protect_enable(struct scpsys_domain *pd) {...} > > This allows for better readability. With the WAY_EN patch later in this series scpsys_bus_protect_enable() is going to use scpsys_bus_protect_clear(). So I would need to add a signature in that patch for scpsys_bus_protect_clear() or move it back up. I would prefer to avoid adding a signature or moving so I added it above these functions here. I could swap scpsys_bus_protect_set() and scpscpsys_bus_protect_clear() if that helps readability. Thank you, Markus > > > +static int scpsys_bus_protect_set(const struct scpsys_bus_prot_data *bpd, > > + struct regmap *regmap) > > +{ > > + u32 val; > > + u32 sta_mask = bpd->bus_prot_sta_mask; > > + > > + if (bpd->bus_prot_reg_update) > > + regmap_set_bits(regmap, bpd->bus_prot_set, bpd->bus_prot_set_clr_mask); > > + else > > + regmap_write(regmap, bpd->bus_prot_set, bpd->bus_prot_set_clr_mask); > > + > > + return regmap_read_poll_timeout(regmap, bpd->bus_prot_sta, > > + val, (val & sta_mask) == sta_mask, > > + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); > > +} > > + > > static int _scpsys_bus_protect_enable(const struct scpsys_bus_prot_data *bpd, struct regmap *regmap) > > { > > int i, ret; > > for (i = 0; i < SPM_MAX_BUS_PROT_DATA; i++) { > > - u32 val; > > - u32 set_clr_mask = bpd[i].bus_prot_set_clr_mask; > > - u32 sta_mask = bpd[i].bus_prot_sta_mask; > > - > > - if (!set_clr_mask) > > + if (!bpd[i].bus_prot_set_clr_mask) > > break; > > - if (bpd[i].bus_prot_reg_update) > > - regmap_set_bits(regmap, bpd[i].bus_prot_set, set_clr_mask); > > - else > > - regmap_write(regmap, bpd[i].bus_prot_set, set_clr_mask); > > - > > - ret = regmap_read_poll_timeout(regmap, bpd[i].bus_prot_sta, > > - val, (val & sta_mask) == sta_mask, > > - MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); > > + ret = scpsys_bus_protect_set(&bpd[i], regmap); > > if (ret) > > return ret; > > } > > @@ -161,24 +185,10 @@ static int _scpsys_bus_protect_disable(const struct scpsys_bus_prot_data *bpd, > > int i, ret; > > for (i = SPM_MAX_BUS_PROT_DATA - 1; i >= 0; i--) { > > - u32 val; > > - u32 set_clr_mask = bpd[i].bus_prot_set_clr_mask; > > - u32 sta_mask = bpd[i].bus_prot_sta_mask; > > - > > - if (!set_clr_mask) > > - continue; > > - > > - if (bpd[i].bus_prot_reg_update) > > - regmap_clear_bits(regmap, bpd[i].bus_prot_clr, set_clr_mask); > > - else > > - regmap_write(regmap, bpd[i].bus_prot_clr, set_clr_mask); > > - > > - if (bpd[i].ignore_clr_ack) > > + if (!bpd[i].bus_prot_set_clr_mask) > > continue; > > - ret = regmap_read_poll_timeout(regmap, bpd[i].bus_prot_sta, > > - val, !(val & sta_mask), > > - MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); > > + ret = scpsys_bus_protect_clear(&bpd[i], regmap); > > if (ret) > > return ret; > > }