diff options
| -rw-r--r-- | Documentation/devicetree/bindings/arm/ste-u300.txt | 30 | ||||
| -rw-r--r-- | arch/arm/boot/dts/ste-u300.dts | 6 | ||||
| -rw-r--r-- | arch/arm/mach-u300/core.c | 22 | ||||
| -rw-r--r-- | arch/arm/mach-u300/regulator.c | 21 |
4 files changed, 69 insertions, 10 deletions
diff --git a/Documentation/devicetree/bindings/arm/ste-u300.txt b/Documentation/devicetree/bindings/arm/ste-u300.txt index cd9001a667bc..69b5ab0b5f4b 100644 --- a/Documentation/devicetree/bindings/arm/ste-u300.txt +++ b/Documentation/devicetree/bindings/arm/ste-u300.txt @@ -8,15 +8,39 @@ Required root node property: compatible="stericsson,u300"; +Required node: syscon +This contains the system controller. +- compatible: must be "stericsson,u300-syscon". +- reg: the base address and size of the system controller. + Boards with the U300 SoC include: S365 "Small Board U365": Required node: s365 +This contains the board-specific information. +- compatible: must be "stericsson,s365". +- vana15-supply: the regulator supplying the 1.5V to drive the + board. +- syscon: a pointer to the syscon node so we can acccess the + syscon registers to set the board as self-powered. Example: -s365 { - compatible = "stericsson,s365"; - vana15-supply = <&ab3100_ldo_d_reg>; +/ { + model = "ST-Ericsson U300"; + compatible = "stericsson,u300"; + #address-cells = <1>; + #size-cells = <1>; + + s365 { + compatible = "stericsson,s365"; + vana15-supply = <&ab3100_ldo_d_reg>; + syscon = <&syscon>; + }; + + syscon: syscon@c0011000 { + compatible = "stericsson,u300-syscon"; + reg = <0xc0011000 0x1000>; + }; }; diff --git a/arch/arm/boot/dts/ste-u300.dts b/arch/arm/boot/dts/ste-u300.dts index b8a8ddb5abff..644befd5ea8f 100644 --- a/arch/arm/boot/dts/ste-u300.dts +++ b/arch/arm/boot/dts/ste-u300.dts @@ -27,6 +27,12 @@ s365 { compatible = "stericsson,s365"; vana15-supply = <&ab3100_ldo_d_reg>; + syscon = <&syscon>; + }; + + syscon: syscon@c0011000 { + compatible = "stericsson,u300-syscon"; + reg = <0xc0011000 0x1000>; }; timer: timer@c0014000 { diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c index 1fdaf81771fa..8cfca45d3650 100644 --- a/arch/arm/mach-u300/core.c +++ b/arch/arm/mach-u300/core.c @@ -14,6 +14,7 @@ #include <linux/platform_data/clk-u300.h> #include <linux/platform_data/pinctrl-coh901.h> #include <linux/irqchip.h> +#include <linux/of_address.h> #include <linux/of_platform.h> #include <linux/clocksource.h> #include <linux/clk.h> @@ -48,6 +49,8 @@ #define U300_SYSCON_BCR_EXTRA_BOOT_OPTION_MASK (0x01FC) #define U300_SYSCON_BCR_APP_BOOT_SERV_MASK (0x0003) +static void __iomem *syscon_base; + /* * Static I/O mappings that are needed for booting the U300 platforms. The * only things we need are the areas where we find the timer, syscon and @@ -171,7 +174,7 @@ static void __init u300_init_check_chip(void) const char unknown[] = "UNKNOWN"; /* Read out and print chip ID */ - val = readw(U300_SYSCON_VBASE + U300_SYSCON_CIDR); + val = readw(syscon_base + U300_SYSCON_CIDR); /* This is in funky bigendian order... */ val = (val & 0xFFU) << 8 | (val >> 8); chip = db_chips; @@ -244,10 +247,21 @@ static struct of_dev_auxdata u300_auxdata_lookup[] __initdata = { static void __init u300_init_irq_dt(void) { + struct device_node *syscon; struct clk *clk; + syscon = of_find_node_by_path("/syscon@c0011000"); + if (!syscon) { + pr_crit("could not find syscon node\n"); + return; + } + syscon_base = of_iomap(syscon, 0); + if (!syscon_base) { + pr_crit("could not remap syscon\n"); + return; + } /* initialize clocking early, we want to clock the INTCON */ - u300_clk_init(U300_SYSCON_VBASE); + u300_clk_init(syscon_base); /* Bootstrap EMIF and SEMI clocks */ clk = clk_get_sys("pl172", NULL); @@ -280,9 +294,9 @@ static void __init u300_init_machine_dt(void) u300_auxdata_lookup, NULL); /* Enable SEMI self refresh */ - val = readw(U300_SYSCON_VBASE + U300_SYSCON_SMCR) | + val = readw(syscon_base + U300_SYSCON_SMCR) | U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE; - writew(val, U300_SYSCON_VBASE + U300_SYSCON_SMCR); + writew(val, syscon_base + U300_SYSCON_SMCR); } static const char * u300_board_compat[] = { diff --git a/arch/arm/mach-u300/regulator.c b/arch/arm/mach-u300/regulator.c index 1cbe88c74367..273fceb83685 100644 --- a/arch/arm/mach-u300/regulator.c +++ b/arch/arm/mach-u300/regulator.c @@ -16,8 +16,8 @@ #include <linux/regulator/machine.h> #include <linux/regulator/consumer.h> /* Those are just for writing in syscon */ +#include <linux/of_address.h> #include <linux/io.h> -#include "u300-regs.h" /* Power Management Control 16bit (R/W) */ #define U300_SYSCON_PMCR (0x50) @@ -57,10 +57,25 @@ void u300_pm_poweroff(void) */ static int __init __u300_init_boardpower(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; + struct device_node *syscon_np; + static void __iomem *syscon_base; int err; u32 val; pr_info("U300: setting up board power\n"); + + syscon_np = of_parse_phandle(np, "syscon", 0); + if (!syscon_np) { + pr_crit("U300: no syscon node\n"); + return -ENODEV; + } + syscon_base = of_iomap(syscon_np, 0); + if (!syscon_base) { + pr_crit("U300: could not remap syscon\n"); + return -ENODEV; + } + main_power_15 = regulator_get(&pdev->dev, "vana15"); if (IS_ERR(main_power_15)) { @@ -81,9 +96,9 @@ static int __init __u300_init_boardpower(struct platform_device *pdev) * the rest of the U300 power management is implemented. */ pr_info("U300: disable system controller pull-up\n"); - val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMCR); + val = readw(syscon_base + U300_SYSCON_PMCR); val &= ~U300_SYSCON_PMCR_DCON_ENABLE; - writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMCR); + writew(val, syscon_base + U300_SYSCON_PMCR); /* Register globally exported PM poweroff hook */ pm_power_off = u300_pm_poweroff; |