| Message ID | 20180803030237.3366-9-songjun.wu@linux.intel.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | MIPS: intel: add initial support for Intel MIPS SoCs | expand |
On Fri, Aug 03, 2018 at 11:02:27AM +0800, Songjun Wu wrote: > Get serial id from dts. > > "#ifdef CONFIG_LANTIQ" preprocessor is used because LTQ_EARLY_ASC > macro is defined in lantiq_soc.h. > lantiq_soc.h is in arch path for legacy product support. > > arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h > > If "#ifdef preprocessor" is changed to > "if (IS_ENABLED(CONFIG_LANTIQ))", when CONFIG_LANTIQ is not enabled, > code using LTQ_EARLY_ASC is compiled. > Compilation will fail for no LTQ_EARLY_ASC defined. > > Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com> > --- > > Changes in v2: None > > drivers/tty/serial/lantiq.c | 19 +++++++++++++++---- > 1 file changed, 15 insertions(+), 4 deletions(-) > > diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c > index 044128277248..836ca51460f2 100644 > --- a/drivers/tty/serial/lantiq.c > +++ b/drivers/tty/serial/lantiq.c > @@ -6,6 +6,7 @@ > * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> > * Copyright (C) 2007 John Crispin <john@phrozen.org> > * Copyright (C) 2010 Thomas Langer, <thomas.langer@lantiq.com> > + * Copyright (C) 2018 Intel Corporation. Your changes here do not warrent the addition of a copyright line, don't you agree? If not, please get a signed-off-by from your corporate lawyer who does this this is warrented when you resend this patch. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 8/3/2018 1:43 PM, Greg Kroah-Hartman wrote: > On Fri, Aug 03, 2018 at 11:02:27AM +0800, Songjun Wu wrote: >> Get serial id from dts. >> >> "#ifdef CONFIG_LANTIQ" preprocessor is used because LTQ_EARLY_ASC >> macro is defined in lantiq_soc.h. >> lantiq_soc.h is in arch path for legacy product support. >> >> arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h >> >> If "#ifdef preprocessor" is changed to >> "if (IS_ENABLED(CONFIG_LANTIQ))", when CONFIG_LANTIQ is not enabled, >> code using LTQ_EARLY_ASC is compiled. >> Compilation will fail for no LTQ_EARLY_ASC defined. >> >> Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com> >> --- >> >> Changes in v2: None >> >> drivers/tty/serial/lantiq.c | 19 +++++++++++++++---- >> 1 file changed, 15 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c >> index 044128277248..836ca51460f2 100644 >> --- a/drivers/tty/serial/lantiq.c >> +++ b/drivers/tty/serial/lantiq.c >> @@ -6,6 +6,7 @@ >> * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> >> * Copyright (C) 2007 John Crispin <john@phrozen.org> >> * Copyright (C) 2010 Thomas Langer, <thomas.langer@lantiq.com> >> + * Copyright (C) 2018 Intel Corporation. > Your changes here do not warrent the addition of a copyright line, don't > you agree? If not, please get a signed-off-by from your corporate > lawyer who does this this is warrented when you resend this patch. > > thanks, > > greg k-h > Thanks. The copyright line will be removed when we resend this patch. -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Songjun, On Fri, Aug 3, 2018 at 5:04 AM Songjun Wu <songjun.wu@linux.intel.com> wrote: > Get serial id from dts. > > "#ifdef CONFIG_LANTIQ" preprocessor is used because LTQ_EARLY_ASC > macro is defined in lantiq_soc.h. > lantiq_soc.h is in arch path for legacy product support. > > arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h > > If "#ifdef preprocessor" is changed to > "if (IS_ENABLED(CONFIG_LANTIQ))", when CONFIG_LANTIQ is not enabled, > code using LTQ_EARLY_ASC is compiled. > Compilation will fail for no LTQ_EARLY_ASC defined. > > Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com> Thanks for your patch! > @@ -699,9 +700,19 @@ lqasc_probe(struct platform_device *pdev) > return -ENODEV; > } > > - /* check if this is the console port */ > - if (mmres->start != CPHYSADDR(LTQ_EARLY_ASC)) > - line = 1; > + /* get serial id */ > + line = of_alias_get_id(node, "serial"); > + if (line < 0) { > +#ifdef CONFIG_LANTIQ > + if (mmres->start == CPHYSADDR(LTQ_EARLY_ASC)) > + line = 0; > + else > + line = 1; > +#else > + dev_err(&pdev->dev, "failed to get alias id, errno %d\n", line); > + return line; Please note that not providing a fallback here makes life harder when using DT overlays. See the description of commit 7678f4c20fa7670f ("serial: sh-sci: Add support for dynamic instances") for background info. > +#endif > + } > > if (lqasc_port[line]) { > dev_err(&pdev->dev, "port %d already allocated\n", line); Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 8/7/2018 3:33 PM, Geert Uytterhoeven wrote: > Hi Songjun, > > On Fri, Aug 3, 2018 at 5:04 AM Songjun Wu <songjun.wu@linux.intel.com> wrote: >> Get serial id from dts. >> >> "#ifdef CONFIG_LANTIQ" preprocessor is used because LTQ_EARLY_ASC >> macro is defined in lantiq_soc.h. >> lantiq_soc.h is in arch path for legacy product support. >> >> arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h >> >> If "#ifdef preprocessor" is changed to >> "if (IS_ENABLED(CONFIG_LANTIQ))", when CONFIG_LANTIQ is not enabled, >> code using LTQ_EARLY_ASC is compiled. >> Compilation will fail for no LTQ_EARLY_ASC defined. >> >> Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com> > Thanks for your patch! > >> @@ -699,9 +700,19 @@ lqasc_probe(struct platform_device *pdev) >> return -ENODEV; >> } >> >> - /* check if this is the console port */ >> - if (mmres->start != CPHYSADDR(LTQ_EARLY_ASC)) >> - line = 1; >> + /* get serial id */ >> + line = of_alias_get_id(node, "serial"); >> + if (line < 0) { >> +#ifdef CONFIG_LANTIQ >> + if (mmres->start == CPHYSADDR(LTQ_EARLY_ASC)) >> + line = 0; >> + else >> + line = 1; >> +#else >> + dev_err(&pdev->dev, "failed to get alias id, errno %d\n", line); >> + return line; > Please note that not providing a fallback here makes life harder when using > DT overlays. > See the description of commit 7678f4c20fa7670f ("serial: sh-sci: Add support > for dynamic instances") for background info. Thanks for your comment. The logic in commit 7678f4c20fa7670f is not suitable here. We need to know which serial instance is used for console. We cannot use dynamic serial instance here. -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Songjun, On Wed, Aug 8, 2018 at 6:05 AM Wu, Songjun <songjun.wu@linux.intel.com> wrote: > On 8/7/2018 3:33 PM, Geert Uytterhoeven wrote: > > On Fri, Aug 3, 2018 at 5:04 AM Songjun Wu <songjun.wu@linux.intel.com> wrote: > >> Get serial id from dts. > >> > >> "#ifdef CONFIG_LANTIQ" preprocessor is used because LTQ_EARLY_ASC > >> macro is defined in lantiq_soc.h. > >> lantiq_soc.h is in arch path for legacy product support. > >> > >> arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h > >> > >> If "#ifdef preprocessor" is changed to > >> "if (IS_ENABLED(CONFIG_LANTIQ))", when CONFIG_LANTIQ is not enabled, > >> code using LTQ_EARLY_ASC is compiled. > >> Compilation will fail for no LTQ_EARLY_ASC defined. > >> > >> Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com> > > Thanks for your patch! > > > >> @@ -699,9 +700,19 @@ lqasc_probe(struct platform_device *pdev) > >> return -ENODEV; > >> } > >> > >> - /* check if this is the console port */ > >> - if (mmres->start != CPHYSADDR(LTQ_EARLY_ASC)) > >> - line = 1; > >> + /* get serial id */ > >> + line = of_alias_get_id(node, "serial"); > >> + if (line < 0) { > >> +#ifdef CONFIG_LANTIQ > >> + if (mmres->start == CPHYSADDR(LTQ_EARLY_ASC)) > >> + line = 0; > >> + else > >> + line = 1; > >> +#else > >> + dev_err(&pdev->dev, "failed to get alias id, errno %d\n", line); > >> + return line; > > Please note that not providing a fallback here makes life harder when using > > DT overlays. > > See the description of commit 7678f4c20fa7670f ("serial: sh-sci: Add support > > for dynamic instances") for background info. > Thanks for your comment. > The logic in commit 7678f4c20fa7670f is not suitable here. > We need to know which serial instance is used for console. > We cannot use dynamic serial instance here. Why does the driver need to use which serial instance is used for the console? Hardcoding that is not an option, as the board DTS may specify the console using chosen/stdout-path. Gr{oetje,eeting}s, Geert
On 8/8/2018 4:33 PM, Geert Uytterhoeven wrote: > Hi Songjun, > > On Wed, Aug 8, 2018 at 6:05 AM Wu, Songjun <songjun.wu@linux.intel.com> wrote: >> On 8/7/2018 3:33 PM, Geert Uytterhoeven wrote: >>> On Fri, Aug 3, 2018 at 5:04 AM Songjun Wu <songjun.wu@linux.intel.com> wrote: >>>> Get serial id from dts. >>>> >>>> "#ifdef CONFIG_LANTIQ" preprocessor is used because LTQ_EARLY_ASC >>>> macro is defined in lantiq_soc.h. >>>> lantiq_soc.h is in arch path for legacy product support. >>>> >>>> arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h >>>> >>>> If "#ifdef preprocessor" is changed to >>>> "if (IS_ENABLED(CONFIG_LANTIQ))", when CONFIG_LANTIQ is not enabled, >>>> code using LTQ_EARLY_ASC is compiled. >>>> Compilation will fail for no LTQ_EARLY_ASC defined. >>>> >>>> Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com> >>> Thanks for your patch! >>> >>>> @@ -699,9 +700,19 @@ lqasc_probe(struct platform_device *pdev) >>>> return -ENODEV; >>>> } >>>> >>>> - /* check if this is the console port */ >>>> - if (mmres->start != CPHYSADDR(LTQ_EARLY_ASC)) >>>> - line = 1; >>>> + /* get serial id */ >>>> + line = of_alias_get_id(node, "serial"); >>>> + if (line < 0) { >>>> +#ifdef CONFIG_LANTIQ >>>> + if (mmres->start == CPHYSADDR(LTQ_EARLY_ASC)) >>>> + line = 0; >>>> + else >>>> + line = 1; >>>> +#else >>>> + dev_err(&pdev->dev, "failed to get alias id, errno %d\n", line); >>>> + return line; >>> Please note that not providing a fallback here makes life harder when using >>> DT overlays. >>> See the description of commit 7678f4c20fa7670f ("serial: sh-sci: Add support >>> for dynamic instances") for background info. >> Thanks for your comment. >> The logic in commit 7678f4c20fa7670f is not suitable here. >> We need to know which serial instance is used for console. >> We cannot use dynamic serial instance here. > Why does the driver need to use which serial instance is used for the console? > Hardcoding that is not an option, as the board DTS may specify the console using > chosen/stdout-path. In legacy platform in open source, it only defined asc1 in dts. There's no asc0 in legacy dts.While in the new platform, asc0 is defined in dts. There's no asc1 in new platform dts. To avoid hard code in driver, alias serial0 is used to unified driver code. Actually only one serial is supported in SoC. aliases { serial0 = &asc0; }; chosen { bootargs = "earlycon clk_ignore_unused"; stdout-path = "serial0"; };
diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c index 044128277248..836ca51460f2 100644 --- a/drivers/tty/serial/lantiq.c +++ b/drivers/tty/serial/lantiq.c @@ -6,6 +6,7 @@ * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> * Copyright (C) 2007 John Crispin <john@phrozen.org> * Copyright (C) 2010 Thomas Langer, <thomas.langer@lantiq.com> + * Copyright (C) 2018 Intel Corporation. */ #include <linux/slab.h> @@ -688,7 +689,7 @@ lqasc_probe(struct platform_device *pdev) struct ltq_uart_port *ltq_port; struct uart_port *port; struct resource *mmres, irqres[3]; - int line = 0; + int line; int ret; mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -699,9 +700,19 @@ lqasc_probe(struct platform_device *pdev) return -ENODEV; } - /* check if this is the console port */ - if (mmres->start != CPHYSADDR(LTQ_EARLY_ASC)) - line = 1; + /* get serial id */ + line = of_alias_get_id(node, "serial"); + if (line < 0) { +#ifdef CONFIG_LANTIQ + if (mmres->start == CPHYSADDR(LTQ_EARLY_ASC)) + line = 0; + else + line = 1; +#else + dev_err(&pdev->dev, "failed to get alias id, errno %d\n", line); + return line; +#endif + } if (lqasc_port[line]) { dev_err(&pdev->dev, "port %d already allocated\n", line);
Get serial id from dts. "#ifdef CONFIG_LANTIQ" preprocessor is used because LTQ_EARLY_ASC macro is defined in lantiq_soc.h. lantiq_soc.h is in arch path for legacy product support. arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h If "#ifdef preprocessor" is changed to "if (IS_ENABLED(CONFIG_LANTIQ))", when CONFIG_LANTIQ is not enabled, code using LTQ_EARLY_ASC is compiled. Compilation will fail for no LTQ_EARLY_ASC defined. Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com> --- Changes in v2: None drivers/tty/serial/lantiq.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-)