From: Stephen Warren swarren@nvidia.com
Use a named constant for the PLL lock bit in enable_cpu_clocks().
Construct the complete value of pmc_pwrgate_toggle, rather than doing a read-modify-write; the register is simple enough and doesn't need to maintain state between operations.
Signed-off-by: Stephen Warren swarren@nvidia.com --- v2: New patch, split out from the later Tegra124 changes. --- arch/arm/cpu/arm720t/tegra114/cpu.c | 6 ++---- arch/arm/include/asm/arch-tegra/clk_rst.h | 3 +++ 2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/arch/arm/cpu/arm720t/tegra114/cpu.c b/arch/arm/cpu/arm720t/tegra114/cpu.c index 385e1a1c86e0..a5de100140ab 100644 --- a/arch/arm/cpu/arm720t/tegra114/cpu.c +++ b/arch/arm/cpu/arm720t/tegra114/cpu.c @@ -68,7 +68,7 @@ static void enable_cpu_clocks(void) /* Wait for PLL-X to lock */ do { reg = readl(&clkrst->crc_pll_simple[SIMPLE_PLLX].pll_base); - } while ((reg & (1 << 27)) == 0); + } while ((reg & PLL_LOCK_MASK) == 0);
/* Wait until all clocks are stable */ udelay(PLL_STABILIZATION_DELAY); @@ -221,9 +221,7 @@ static void power_partition(u32 status, u32 partid) if (!is_partition_powered(status)) { /* No, toggle the partition power state (OFF -> ON) */ debug("power_partition, toggling state\n"); - clrbits_le32(&pmc->pmc_pwrgate_toggle, 0x1F); - setbits_le32(&pmc->pmc_pwrgate_toggle, partid); - setbits_le32(&pmc->pmc_pwrgate_toggle, START_CP); + writel(START_CP | partid, &pmc->pmc_pwrgate_toggle);
/* Wait for the power to come up */ while (!is_partition_powered(status)) diff --git a/arch/arm/include/asm/arch-tegra/clk_rst.h b/arch/arm/include/asm/arch-tegra/clk_rst.h index 021cfcc3c602..b9dccd9c189f 100644 --- a/arch/arm/include/asm/arch-tegra/clk_rst.h +++ b/arch/arm/include/asm/arch-tegra/clk_rst.h @@ -160,6 +160,9 @@ struct clk_rst_ctlr {
#define PLL_BASE_OVRRIDE_MASK (1U << 28)
+#define PLL_LOCK_SHIFT 27 +#define PLL_LOCK_MASK (1U << PLL_LOCK_SHIFT) + #define PLL_DIVP_SHIFT 20 #define PLL_DIVP_MASK (7U << PLL_DIVP_SHIFT)