diff options
Diffstat (limited to 'arch/arm/mach-zynq')
| -rw-r--r-- | arch/arm/mach-zynq/slcr.c | 56 |
1 files changed, 48 insertions, 8 deletions
diff --git a/arch/arm/mach-zynq/slcr.c b/arch/arm/mach-zynq/slcr.c index 34c1c2a20d8b..ab85f4e8edb0 100644 --- a/arch/arm/mach-zynq/slcr.c +++ b/arch/arm/mach-zynq/slcr.c @@ -35,6 +35,42 @@ static void __iomem *zynq_slcr_base; static struct regmap *zynq_slcr_regmap; /** + * zynq_slcr_write - Write to a register in SLCR block + * + * @val: Value to write to the register + * @offset: Register offset in SLCR block + * + * Return: a negative value on error, 0 on success + */ +static int zynq_slcr_write(u32 val, u32 offset) +{ + if (!zynq_slcr_regmap) { + writel(val, zynq_slcr_base + offset); + return 0; + } + + return regmap_write(zynq_slcr_regmap, offset, val); +} + +/** + * zynq_slcr_read - Read a register in SLCR block + * + * @val: Pointer to value to be read from SLCR + * @offset: Register offset in SLCR block + * + * Return: a negative value on error, 0 on success + */ +static int zynq_slcr_read(u32 *val, u32 offset) +{ + if (zynq_slcr_regmap) + return regmap_read(zynq_slcr_regmap, offset, val); + + *val = readl(zynq_slcr_base + offset); + + return 0; +} + +/** * zynq_slcr_system_reset - Reset the entire system. */ void zynq_slcr_system_reset(void) @@ -53,9 +89,9 @@ void zynq_slcr_system_reset(void) * the FSBL not loading the bitstream after soft-reboot * This is a temporary solution until we know more. */ - reboot = readl(zynq_slcr_base + SLCR_REBOOT_STATUS_OFFSET); - writel(reboot & 0xF0FFFFFF, zynq_slcr_base + SLCR_REBOOT_STATUS_OFFSET); - writel(1, zynq_slcr_base + SLCR_PS_RST_CTRL_OFFSET); + zynq_slcr_read(&reboot, SLCR_REBOOT_STATUS_OFFSET); + zynq_slcr_write(reboot & 0xF0FFFFFF, SLCR_REBOOT_STATUS_OFFSET); + zynq_slcr_write(1, SLCR_PS_RST_CTRL_OFFSET); } /** @@ -64,11 +100,13 @@ void zynq_slcr_system_reset(void) */ void zynq_slcr_cpu_start(int cpu) { - u32 reg = readl(zynq_slcr_base + SLCR_A9_CPU_RST_CTRL_OFFSET); + u32 reg; + + zynq_slcr_read(®, SLCR_A9_CPU_RST_CTRL_OFFSET); reg &= ~(SLCR_A9_CPU_RST << cpu); - writel(reg, zynq_slcr_base + SLCR_A9_CPU_RST_CTRL_OFFSET); + zynq_slcr_write(reg, SLCR_A9_CPU_RST_CTRL_OFFSET); reg &= ~(SLCR_A9_CPU_CLKSTOP << cpu); - writel(reg, zynq_slcr_base + SLCR_A9_CPU_RST_CTRL_OFFSET); + zynq_slcr_write(reg, SLCR_A9_CPU_RST_CTRL_OFFSET); } /** @@ -77,9 +115,11 @@ void zynq_slcr_cpu_start(int cpu) */ void zynq_slcr_cpu_stop(int cpu) { - u32 reg = readl(zynq_slcr_base + SLCR_A9_CPU_RST_CTRL_OFFSET); + u32 reg; + + zynq_slcr_read(®, SLCR_A9_CPU_RST_CTRL_OFFSET); reg |= (SLCR_A9_CPU_CLKSTOP | SLCR_A9_CPU_RST) << cpu; - writel(reg, zynq_slcr_base + SLCR_A9_CPU_RST_CTRL_OFFSET); + zynq_slcr_write(reg, SLCR_A9_CPU_RST_CTRL_OFFSET); } /** |