diff options
| -rw-r--r-- | Documentation/devicetree/bindings/arm/atmel-at91.txt | 29 | ||||
| -rw-r--r-- | arch/arm/boot/dts/at91sam9g20.dtsi | 5 | ||||
| -rw-r--r-- | arch/arm/boot/dts/at91sam9g45.dtsi | 5 | ||||
| -rw-r--r-- | arch/arm/boot/dts/at91sam9x5.dtsi | 5 | ||||
| -rw-r--r-- | arch/arm/mach-at91/include/mach/at91_shdwc.h | 4 | ||||
| -rw-r--r-- | arch/arm/mach-at91/setup.c | 77 |
6 files changed, 124 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt index 1f87820..ecc81e3 100644 --- a/Documentation/devicetree/bindings/arm/atmel-at91.txt +++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt @@ -61,3 +61,32 @@ Examples: reg = <0xffffe400 0x200 0xffffe600 0x200>; }; + +SHDWC Shutdown Controller + +required properties: +- compatible: Should be "atmel,<chip>-shdwc". + <chip> can be "at91sam9260", "at91sam9rl" or "at91sam9x5". +- reg: Should contain registers location and length + +optional properties: +- atmel,wakeup-mode: String, operation mode of the wakeup mode. + Supported values are: "none", "high", "low", "any". +- atmel,wakeup-counter: Counter on Wake-up 0 (between 0x0 and 0xf). + +optional at91sam9260 properties: +- atmel,wakeup-rtt-timer: boolean to enable Real-time Timer Wake-up. + +optional at91sam9rl properties: +- atmel,wakeup-rtc-timer: boolean to enable Real-time Clock Wake-up. +- atmel,wakeup-rtt-timer: boolean to enable Real-time Timer Wake-up. + +optional at91sam9x5 properties: +- atmel,wakeup-rtc-timer: boolean to enable Real-time Clock Wake-up. + +Example: + + rstc@fffffd00 { + compatible = "atmel,at91sam9260-rstc"; + reg = <0xfffffd00 0x10>; + }; diff --git a/arch/arm/boot/dts/at91sam9g20.dtsi b/arch/arm/boot/dts/at91sam9g20.dtsi index 0a1df8d..9a0647b 100644 --- a/arch/arm/boot/dts/at91sam9g20.dtsi +++ b/arch/arm/boot/dts/at91sam9g20.dtsi @@ -74,6 +74,11 @@ reg = <0xfffffd00 0x10>; }; + shdwc@fffffd10 { + compatible = "atmel,at91sam9260-shdwc"; + reg = <0xfffffd10 0x10>; + }; + pit: timer@fffffd30 { compatible = "atmel,at91sam9260-pit"; reg = <0xfffffd30 0xf>; diff --git a/arch/arm/boot/dts/at91sam9g45.dtsi b/arch/arm/boot/dts/at91sam9g45.dtsi index 587a191..8908f07 100644 --- a/arch/arm/boot/dts/at91sam9g45.dtsi +++ b/arch/arm/boot/dts/at91sam9g45.dtsi @@ -83,6 +83,11 @@ }; + shdwc@fffffd10 { + compatible = "atmel,at91sam9rl-shdwc"; + reg = <0xfffffd10 0x10>; + }; + tcb0: timer@fff7c000 { compatible = "atmel,at91rm9200-tcb"; reg = <0xfff7c000 0x100>; diff --git a/arch/arm/boot/dts/at91sam9x5.dtsi b/arch/arm/boot/dts/at91sam9x5.dtsi index 73c46e3d..20155cc 100644 --- a/arch/arm/boot/dts/at91sam9x5.dtsi +++ b/arch/arm/boot/dts/at91sam9x5.dtsi @@ -73,6 +73,11 @@ reg = <0xfffffe00 0x10>; }; + shdwc@fffffe10 { + compatible = "atmel,at91sam9x5-shdwc"; + reg = <0xfffffe10 0x10>; + }; + pit: timer@fffffe30 { compatible = "atmel,at91sam9260-pit"; reg = <0xfffffe30 0xf>; diff --git a/arch/arm/mach-at91/include/mach/at91_shdwc.h b/arch/arm/mach-at91/include/mach/at91_shdwc.h index 1d4fe82..60478ea 100644 --- a/arch/arm/mach-at91/include/mach/at91_shdwc.h +++ b/arch/arm/mach-at91/include/mach/at91_shdwc.h @@ -36,9 +36,11 @@ extern void __iomem *at91_shdwc_base; #define AT91_SHDW_WKMODE0_HIGH 1 #define AT91_SHDW_WKMODE0_LOW 2 #define AT91_SHDW_WKMODE0_ANYLEVEL 3 -#define AT91_SHDW_CPTWK0 (0xf << 4) /* Counter On Wake Up 0 */ +#define AT91_SHDW_CPTWK0_MAX 0xf /* Maximum Counter On Wake Up 0 */ +#define AT91_SHDW_CPTWK0 (AT91_SHDW_CPTWK0_MAX << 4) /* Counter On Wake Up 0 */ #define AT91_SHDW_CPTWK0_(x) ((x) << 4) #define AT91_SHDW_RTTWKEN (1 << 16) /* Real Time Timer Wake-up Enable */ +#define AT91_SHDW_RTCWKEN (1 << 17) /* Real Time Clock Wake-up Enable */ #define AT91_SHDW_SR 0x08 /* Shut Down Status Register */ #define AT91_SHDW_WAKEUP0 (1 << 0) /* Wake-up 0 Status */ diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c index 46d0a56..1083739 100644 --- a/arch/arm/mach-at91/setup.c +++ b/arch/arm/mach-at91/setup.c @@ -351,10 +351,87 @@ static void at91_dt_ramc(void) of_node_put(np); } +static struct of_device_id shdwc_ids[] = { + { .compatible = "atmel,at91sam9260-shdwc", }, + { .compatible = "atmel,at91sam9rl-shdwc", }, + { .compatible = "atmel,at91sam9x5-shdwc", }, + { /*sentinel*/ } +}; + +static const char *shdwc_wakeup_modes[] = { + [AT91_SHDW_WKMODE0_NONE] = "none", + [AT91_SHDW_WKMODE0_HIGH] = "high", + [AT91_SHDW_WKMODE0_LOW] = "low", + [AT91_SHDW_WKMODE0_ANYLEVEL] = "any", +}; + +const int at91_dtget_shdwc_wakeup_mode(struct device_node *np) +{ + const char *pm; + int err, i; + + err = of_property_read_string(np, "atmel,wakeup-mode", &pm); + if (err < 0) + return AT91_SHDW_WKMODE0_ANYLEVEL; + + for (i = 0; i < ARRAY_SIZE(shdwc_wakeup_modes); i++) + if (!strcasecmp(pm, shdwc_wakeup_modes[i])) + return i; + + return -ENODEV; +} + +static void at91_dt_shdwc(void) +{ + struct device_node *np; + int wakeup_mode; + u32 reg; + u32 mode = 0; + + np = of_find_matching_node(NULL, shdwc_ids); + if (!np) { + pr_debug("AT91: unable to find compatible shutdown (shdwc) conroller node in dtb\n"); + return; + } + + at91_shdwc_base = of_iomap(np, 0); + if (!at91_shdwc_base) + panic("AT91: unable to map shdwc cpu registers\n"); + + wakeup_mode = at91_dtget_shdwc_wakeup_mode(np); + if (wakeup_mode < 0) { + pr_warn("AT91: shdwc unknown wakeup mode\n"); + goto end; + } + + if (!of_property_read_u32(np, "atmel,wakeup-counter", ®)) { + if (reg > AT91_SHDW_CPTWK0_MAX) { + pr_warn("AT91: shdwc wakeup conter 0x%x > 0x%x reduce it to 0x%x\n", + reg, AT91_SHDW_CPTWK0_MAX, AT91_SHDW_CPTWK0_MAX); + reg = AT91_SHDW_CPTWK0_MAX; + } + mode |= AT91_SHDW_CPTWK0_(reg); + } + + if (of_property_read_bool(np, "atmel,wakeup-rtc-timer")) + mode |= AT91_SHDW_RTCWKEN; + + if (of_property_read_bool(np, "atmel,wakeup-rtt-timer")) + mode |= AT91_SHDW_RTTWKEN; + + at91_shdwc_write(AT91_SHDW_MR, wakeup_mode | mode); + +end: + pm_power_off = at91sam9_poweroff; + + of_node_put(np); +} + void __init at91_dt_initialize(void) { at91_dt_rstc(); at91_dt_ramc(); + at91_dt_shdwc(); /* Init clock subsystem */ at91_dt_clock_init(); 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