| Message ID | 20240926213729.2882045-2-marex@denx.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v3,1/2] soc: imx8m: Probe the SoC driver as platform driver | expand |
On Thu, Sep 26, 2024 at 11:36:52PM +0200, Marek Vasut wrote: > The static global soc_uid is only ever used as kasprintf() parameter in > imx8m_soc_probe(). Pass pointer to local u64 variable to .soc_revision() > callback instead and let the .soc_revision() callback fill in the content. > Remove the unnecessary static global variable. Can you simple said: Remove the unnecessary static global variable 'soc_uid', which only used in imx8m_soc_probe(). > > Signed-off-by: Marek Vasut <marex@denx.de> > --- > Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> > Cc: Arnd Bergmann <arnd@arndb.de> > Cc: Fabio Estevam <festevam@gmail.com> > Cc: Jeff Johnson <quic_jjohnson@quicinc.com> > Cc: Neil Armstrong <neil.armstrong@linaro.org> > Cc: Pengutronix Kernel Team <kernel@pengutronix.de> > Cc: Saravana Kannan <saravanak@google.com> > Cc: Sascha Hauer <s.hauer@pengutronix.de> > Cc: Shawn Guo <shawnguo@kernel.org> > Cc: imx@lists.linux.dev > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > --- > V3: New patch > --- > drivers/soc/imx/soc-imx8m.c | 31 +++++++++++++++---------------- > 1 file changed, 15 insertions(+), 16 deletions(-) > > diff --git a/drivers/soc/imx/soc-imx8m.c b/drivers/soc/imx/soc-imx8m.c > index 5ea8887828c06..966593320e28d 100644 > --- a/drivers/soc/imx/soc-imx8m.c > +++ b/drivers/soc/imx/soc-imx8m.c > @@ -30,11 +30,9 @@ > > struct imx8_soc_data { > char *name; > - int (*soc_revision)(u32 *socrev); > + int (*soc_revision)(u32 *socrev, u64 *socuid); > }; > > -static u64 soc_uid; > - > #ifdef CONFIG_HAVE_ARM_SMCCC > static u32 imx8mq_soc_revision_from_atf(void) > { > @@ -51,7 +49,7 @@ static u32 imx8mq_soc_revision_from_atf(void) > static inline u32 imx8mq_soc_revision_from_atf(void) { return 0; }; > #endif > > -static int imx8mq_soc_revision(u32 *socrev) > +static int imx8mq_soc_revision(u32 *socrev, u64 *socuid) > { > struct device_node *np; > void __iomem *ocotp_base; > @@ -89,9 +87,9 @@ static int imx8mq_soc_revision(u32 *socrev) > rev = REV_B1; > } > > - soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH); > - soc_uid <<= 32; > - soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW); > + *socuid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH); > + *socuid <<= 32; > + *socuid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW); > > *socrev = rev; > > @@ -109,7 +107,7 @@ static int imx8mq_soc_revision(u32 *socrev) > return ret; > } > > -static int imx8mm_soc_uid(void) > +static int imx8mm_soc_uid(u64 *socuid) > { > void __iomem *ocotp_base; > struct device_node *np; > @@ -136,9 +134,9 @@ static int imx8mm_soc_uid(void) > > clk_prepare_enable(clk); > > - soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH + offset); > - soc_uid <<= 32; > - soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW + offset); > + *socuid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH + offset); > + *socuid <<= 32; > + *socuid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW + offset); > > clk_disable_unprepare(clk); > clk_put(clk); > @@ -151,7 +149,7 @@ static int imx8mm_soc_uid(void) > return ret; > } > > -static int imx8mm_soc_revision(u32 *socrev) > +static int imx8mm_soc_revision(u32 *socrev, u64 *socuid) > { > struct device_node *np; > void __iomem *anatop_base; > @@ -172,7 +170,7 @@ static int imx8mm_soc_revision(u32 *socrev) > iounmap(anatop_base); > of_node_put(np); > > - return imx8mm_soc_uid(); > + return imx8mm_soc_uid(socuid); > > err_iomap: > of_node_put(np); > @@ -215,10 +213,11 @@ static __maybe_unused const struct of_device_id imx8_soc_match[] = { > static int imx8m_soc_probe(struct platform_device *pdev) > { > struct soc_device_attribute *soc_dev_attr; > - struct soc_device *soc_dev; > + const struct imx8_soc_data *data; > const struct of_device_id *id; > + struct soc_device *soc_dev; > u32 soc_rev = 0; > - const struct imx8_soc_data *data; > + u64 soc_uid = 0; unnecessary this these orders in this patch. > int ret; > > soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); > @@ -241,7 +240,7 @@ static int imx8m_soc_probe(struct platform_device *pdev) > if (data) { > soc_dev_attr->soc_id = data->name; > if (data->soc_revision) { > - ret = data->soc_revision(&soc_rev); > + ret = data->soc_revision(&soc_rev, &soc_uid); > if (ret) > goto free_soc; > } > -- > 2.45.2 >
On 9/27/24 6:58 PM, Frank Li wrote: > On Thu, Sep 26, 2024 at 11:36:52PM +0200, Marek Vasut wrote: >> The static global soc_uid is only ever used as kasprintf() parameter in >> imx8m_soc_probe(). Pass pointer to local u64 variable to .soc_revision() >> callback instead and let the .soc_revision() callback fill in the content. >> Remove the unnecessary static global variable. > > Can you simple said: > > Remove the unnecessary static global variable 'soc_uid', which only used > in imx8m_soc_probe(). I believe it is better to be a bit more verbose in the commit description. >> @@ -215,10 +213,11 @@ static __maybe_unused const struct of_device_id imx8_soc_match[] = { >> static int imx8m_soc_probe(struct platform_device *pdev) >> { >> struct soc_device_attribute *soc_dev_attr; >> - struct soc_device *soc_dev; >> + const struct imx8_soc_data *data; >> const struct of_device_id *id; >> + struct soc_device *soc_dev; >> u32 soc_rev = 0; >> - const struct imx8_soc_data *data; >> + u64 soc_uid = 0; > > unnecessary this these orders in this patch. I can spin the sorting into separate patch if that's really required.
diff --git a/drivers/soc/imx/soc-imx8m.c b/drivers/soc/imx/soc-imx8m.c index 5ea8887828c06..966593320e28d 100644 --- a/drivers/soc/imx/soc-imx8m.c +++ b/drivers/soc/imx/soc-imx8m.c @@ -30,11 +30,9 @@ struct imx8_soc_data { char *name; - int (*soc_revision)(u32 *socrev); + int (*soc_revision)(u32 *socrev, u64 *socuid); }; -static u64 soc_uid; - #ifdef CONFIG_HAVE_ARM_SMCCC static u32 imx8mq_soc_revision_from_atf(void) { @@ -51,7 +49,7 @@ static u32 imx8mq_soc_revision_from_atf(void) static inline u32 imx8mq_soc_revision_from_atf(void) { return 0; }; #endif -static int imx8mq_soc_revision(u32 *socrev) +static int imx8mq_soc_revision(u32 *socrev, u64 *socuid) { struct device_node *np; void __iomem *ocotp_base; @@ -89,9 +87,9 @@ static int imx8mq_soc_revision(u32 *socrev) rev = REV_B1; } - soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH); - soc_uid <<= 32; - soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW); + *socuid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH); + *socuid <<= 32; + *socuid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW); *socrev = rev; @@ -109,7 +107,7 @@ static int imx8mq_soc_revision(u32 *socrev) return ret; } -static int imx8mm_soc_uid(void) +static int imx8mm_soc_uid(u64 *socuid) { void __iomem *ocotp_base; struct device_node *np; @@ -136,9 +134,9 @@ static int imx8mm_soc_uid(void) clk_prepare_enable(clk); - soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH + offset); - soc_uid <<= 32; - soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW + offset); + *socuid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH + offset); + *socuid <<= 32; + *socuid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW + offset); clk_disable_unprepare(clk); clk_put(clk); @@ -151,7 +149,7 @@ static int imx8mm_soc_uid(void) return ret; } -static int imx8mm_soc_revision(u32 *socrev) +static int imx8mm_soc_revision(u32 *socrev, u64 *socuid) { struct device_node *np; void __iomem *anatop_base; @@ -172,7 +170,7 @@ static int imx8mm_soc_revision(u32 *socrev) iounmap(anatop_base); of_node_put(np); - return imx8mm_soc_uid(); + return imx8mm_soc_uid(socuid); err_iomap: of_node_put(np); @@ -215,10 +213,11 @@ static __maybe_unused const struct of_device_id imx8_soc_match[] = { static int imx8m_soc_probe(struct platform_device *pdev) { struct soc_device_attribute *soc_dev_attr; - struct soc_device *soc_dev; + const struct imx8_soc_data *data; const struct of_device_id *id; + struct soc_device *soc_dev; u32 soc_rev = 0; - const struct imx8_soc_data *data; + u64 soc_uid = 0; int ret; soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); @@ -241,7 +240,7 @@ static int imx8m_soc_probe(struct platform_device *pdev) if (data) { soc_dev_attr->soc_id = data->name; if (data->soc_revision) { - ret = data->soc_revision(&soc_rev); + ret = data->soc_revision(&soc_rev, &soc_uid); if (ret) goto free_soc; }
The static global soc_uid is only ever used as kasprintf() parameter in imx8m_soc_probe(). Pass pointer to local u64 variable to .soc_revision() callback instead and let the .soc_revision() callback fill in the content. Remove the unnecessary static global variable. Signed-off-by: Marek Vasut <marex@denx.de> --- Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: Jeff Johnson <quic_jjohnson@quicinc.com> Cc: Neil Armstrong <neil.armstrong@linaro.org> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Cc: Saravana Kannan <saravanak@google.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Shawn Guo <shawnguo@kernel.org> Cc: imx@lists.linux.dev Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org --- V3: New patch --- drivers/soc/imx/soc-imx8m.c | 31 +++++++++++++++---------------- 1 file changed, 15 insertions(+), 16 deletions(-)