| Message ID | 1363360876-13617-11-git-send-email-jon-hunter@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Jon, I have some tiny nitpicks... On Fri, Mar 15, 2013 at 10:21:08AM -0500, Jon Hunter wrote: > Adds a function to read the various GPMC chip-select settings from > device-tree and store them in the gpmc_settings structure. > > Update the GPMC device-tree binding documentation to describe these > options. > > Signed-off-by: Jon Hunter <jon-hunter@ti.com> > --- > Documentation/devicetree/bindings/bus/ti-gpmc.txt | 23 ++++++++++ > arch/arm/mach-omap2/gpmc.c | 49 +++++++++++++++++++++ > arch/arm/mach-omap2/gpmc.h | 2 + > 3 files changed, 74 insertions(+) > > diff --git a/Documentation/devicetree/bindings/bus/ti-gpmc.txt b/Documentation/devicetree/bindings/bus/ti-gpmc.txt > index 5ddb2e9..6fde1cf 100644 > --- a/Documentation/devicetree/bindings/bus/ti-gpmc.txt > +++ b/Documentation/devicetree/bindings/bus/ti-gpmc.txt > @@ -65,6 +65,29 @@ The following are only applicable to OMAP3+ and AM335x: > - gpmc,wr-access > - gpmc,wr-data-mux-bus > > +GPMC chip-select settings properties for child nodes. All are optional. > + > +- gpmc,burst-length Page/burst length. Must be 4, 8 or 16. > +- gpmc,burst-wrap Enables wrap bursting > +- gpmc,burst-read Enables read page/burst mode > +- gpmc,burst-write Enables write page/burst mode > +- gpmc,device-nand Device is NAND > +- gpmc,device-width Total width of device(s) connected to a GPMC > + chip-select in bytes. The GPMC supports 8-bit > + and 16-bit devices and so this property must be > + 1 or 2. > +- gpmc,mux-add-data Address and data multiplexing configuration. > + Valid values are 1 for address-address-data > + multiplexing mode and 2 for address-data > + multiplexing mode. > +- gpmc,sync-read Enables synchronous read. Defaults to asynchronous > + is this is not set. > +- gpmc,sync-write Enables synchronous writes. Defaults to asynchronous > + is this is not set. > +- gpmc,wait-pin Wait-pin used by client. Must be less than > + "gpmc,num-waitpins". > +- gpmc,wait-on-read Enables wait monitoring on reads. > +- gpmc,wait-on-write Enables wait monitoring on writes. > > Example for an AM33xx board: > > diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c > index 3ec1937..1e7eef3 100644 > --- a/arch/arm/mach-omap2/gpmc.c > +++ b/arch/arm/mach-omap2/gpmc.c > @@ -1190,6 +1190,55 @@ static struct of_device_id gpmc_dt_ids[] = { > }; > MODULE_DEVICE_TABLE(of, gpmc_dt_ids); > > +/** > + * gpmc_read_settings_dt - read gpmc settings from device-tree > + * @np: pointer to device-tree node for a gpmc child device > + * @p: pointer to gpmc settings structure > + * > + * Reads the GPMC settings for a GPMC child device from device-tree and > + * stores them in the GPMC settings structure passed. The GPMC settings > + * structure is initialise to zero by this function and so any previously s/initialise/initialized ? > + * stored settings will be clearer. s/clearer/cleared ? I'm not an english native speaker, so please bare with me if I'm wrong on these...
On 03/17/2013 12:24 AM, Ezequiel Garcia wrote: > Hi Jon, > > I have some tiny nitpicks... > > On Fri, Mar 15, 2013 at 10:21:08AM -0500, Jon Hunter wrote: >> Adds a function to read the various GPMC chip-select settings from >> device-tree and store them in the gpmc_settings structure. >> >> Update the GPMC device-tree binding documentation to describe these >> options. >> >> Signed-off-by: Jon Hunter <jon-hunter@ti.com> >> --- >> Documentation/devicetree/bindings/bus/ti-gpmc.txt | 23 ++++++++++ >> arch/arm/mach-omap2/gpmc.c | 49 +++++++++++++++++++++ >> arch/arm/mach-omap2/gpmc.h | 2 + >> 3 files changed, 74 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/bus/ti-gpmc.txt b/Documentation/devicetree/bindings/bus/ti-gpmc.txt >> index 5ddb2e9..6fde1cf 100644 >> --- a/Documentation/devicetree/bindings/bus/ti-gpmc.txt >> +++ b/Documentation/devicetree/bindings/bus/ti-gpmc.txt >> @@ -65,6 +65,29 @@ The following are only applicable to OMAP3+ and AM335x: >> - gpmc,wr-access >> - gpmc,wr-data-mux-bus >> >> +GPMC chip-select settings properties for child nodes. All are optional. >> + >> +- gpmc,burst-length Page/burst length. Must be 4, 8 or 16. >> +- gpmc,burst-wrap Enables wrap bursting >> +- gpmc,burst-read Enables read page/burst mode >> +- gpmc,burst-write Enables write page/burst mode >> +- gpmc,device-nand Device is NAND >> +- gpmc,device-width Total width of device(s) connected to a GPMC >> + chip-select in bytes. The GPMC supports 8-bit >> + and 16-bit devices and so this property must be >> + 1 or 2. >> +- gpmc,mux-add-data Address and data multiplexing configuration. >> + Valid values are 1 for address-address-data >> + multiplexing mode and 2 for address-data >> + multiplexing mode. >> +- gpmc,sync-read Enables synchronous read. Defaults to asynchronous >> + is this is not set. >> +- gpmc,sync-write Enables synchronous writes. Defaults to asynchronous >> + is this is not set. >> +- gpmc,wait-pin Wait-pin used by client. Must be less than >> + "gpmc,num-waitpins". >> +- gpmc,wait-on-read Enables wait monitoring on reads. >> +- gpmc,wait-on-write Enables wait monitoring on writes. >> >> Example for an AM33xx board: >> >> diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c >> index 3ec1937..1e7eef3 100644 >> --- a/arch/arm/mach-omap2/gpmc.c >> +++ b/arch/arm/mach-omap2/gpmc.c >> @@ -1190,6 +1190,55 @@ static struct of_device_id gpmc_dt_ids[] = { >> }; >> MODULE_DEVICE_TABLE(of, gpmc_dt_ids); >> >> +/** >> + * gpmc_read_settings_dt - read gpmc settings from device-tree >> + * @np: pointer to device-tree node for a gpmc child device >> + * @p: pointer to gpmc settings structure >> + * >> + * Reads the GPMC settings for a GPMC child device from device-tree and >> + * stores them in the GPMC settings structure passed. The GPMC settings >> + * structure is initialise to zero by this function and so any previously > > s/initialise/initialized ? Thanks will add the "d". However, "initialise" is correct British English ;-) >> + * stored settings will be clearer. > > s/clearer/cleared ? > > I'm not an english native speaker, > so please bare with me if I'm wrong on these... You are right here too. Will fix thanks! Jon -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/bus/ti-gpmc.txt b/Documentation/devicetree/bindings/bus/ti-gpmc.txt index 5ddb2e9..6fde1cf 100644 --- a/Documentation/devicetree/bindings/bus/ti-gpmc.txt +++ b/Documentation/devicetree/bindings/bus/ti-gpmc.txt @@ -65,6 +65,29 @@ The following are only applicable to OMAP3+ and AM335x: - gpmc,wr-access - gpmc,wr-data-mux-bus +GPMC chip-select settings properties for child nodes. All are optional. + +- gpmc,burst-length Page/burst length. Must be 4, 8 or 16. +- gpmc,burst-wrap Enables wrap bursting +- gpmc,burst-read Enables read page/burst mode +- gpmc,burst-write Enables write page/burst mode +- gpmc,device-nand Device is NAND +- gpmc,device-width Total width of device(s) connected to a GPMC + chip-select in bytes. The GPMC supports 8-bit + and 16-bit devices and so this property must be + 1 or 2. +- gpmc,mux-add-data Address and data multiplexing configuration. + Valid values are 1 for address-address-data + multiplexing mode and 2 for address-data + multiplexing mode. +- gpmc,sync-read Enables synchronous read. Defaults to asynchronous + is this is not set. +- gpmc,sync-write Enables synchronous writes. Defaults to asynchronous + is this is not set. +- gpmc,wait-pin Wait-pin used by client. Must be less than + "gpmc,num-waitpins". +- gpmc,wait-on-read Enables wait monitoring on reads. +- gpmc,wait-on-write Enables wait monitoring on writes. Example for an AM33xx board: diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c index 3ec1937..1e7eef3 100644 --- a/arch/arm/mach-omap2/gpmc.c +++ b/arch/arm/mach-omap2/gpmc.c @@ -1190,6 +1190,55 @@ static struct of_device_id gpmc_dt_ids[] = { }; MODULE_DEVICE_TABLE(of, gpmc_dt_ids); +/** + * gpmc_read_settings_dt - read gpmc settings from device-tree + * @np: pointer to device-tree node for a gpmc child device + * @p: pointer to gpmc settings structure + * + * Reads the GPMC settings for a GPMC child device from device-tree and + * stores them in the GPMC settings structure passed. The GPMC settings + * structure is initialise to zero by this function and so any previously + * stored settings will be clearer. + */ +void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p) +{ + memset(p, 0, sizeof(struct gpmc_settings)); + + if (of_find_property(np, "gpmc,sync-read", NULL)) + p->sync_read = true; + if (of_find_property(np, "gpmc,sync-write", NULL)) + p->sync_write = true; + + if (!of_property_read_u32(np, "gpmc,burst-length", &p->burst_len)) { + if (of_find_property(np, "gpmc,burst-wrap", NULL)) + p->burst_wrap = true; + if (of_find_property(np, "gpmc,burst-read", NULL)) + p->burst_read = true; + if (of_find_property(np, "gpmc,burst-write", NULL)) + p->burst_write = true; + if (!p->burst_read && !p->burst_write) + pr_warn("%s: page/burst-length set but not used!\n", + __func__); + } + + if (!of_property_read_u32(np, "gpmc,wait-pin", &p->wait_pin)) { + if (of_find_property(np, "gpmc,wait-on-read", NULL)) + p->wait_on_read = true; + if (of_find_property(np, "gpmc,wait-on-write", NULL)) + p->wait_on_write = true; + if (!p->wait_on_read && !p->wait_on_write) + pr_warn("%s: read/write wait monitoring not enabled!\n", + __func__); + } + + of_property_read_u32(np, "gpmc,device-width", &p->device_width); + + if (of_find_property(np, "gpmc,device-nand", NULL)) + p->device_nand = true; + + of_property_read_u32(np, "gpmc,mux-add-data", &p->mux_add_data); +} + static void __maybe_unused gpmc_read_timings_dt(struct device_node *np, struct gpmc_timings *gpmc_t) { diff --git a/arch/arm/mach-omap2/gpmc.h b/arch/arm/mach-omap2/gpmc.h index 87d2a22..707f6d5 100644 --- a/arch/arm/mach-omap2/gpmc.h +++ b/arch/arm/mach-omap2/gpmc.h @@ -225,5 +225,7 @@ extern void gpmc_cs_free(int cs); extern void omap3_gpmc_save_context(void); extern void omap3_gpmc_restore_context(void); extern int gpmc_configure(int cmd, int wval); +extern void gpmc_read_settings_dt(struct device_node *np, + struct gpmc_settings *p); #endif
Adds a function to read the various GPMC chip-select settings from device-tree and store them in the gpmc_settings structure. Update the GPMC device-tree binding documentation to describe these options. Signed-off-by: Jon Hunter <jon-hunter@ti.com> --- Documentation/devicetree/bindings/bus/ti-gpmc.txt | 23 ++++++++++ arch/arm/mach-omap2/gpmc.c | 49 +++++++++++++++++++++ arch/arm/mach-omap2/gpmc.h | 2 + 3 files changed, 74 insertions(+)