We run the system bus from the OSC clock during init, to avoid crashing the system while reconfiguring the PLLs. Switch to a more reasonable clock when we are done with this. Signed-off-by: Lucas Stach <dev@xxxxxxxxxx> --- arch/arm/mach-tegra/include/mach/tegra20-car.h | 12 ++++++++++++ drivers/clk/tegra/clk-tegra20.c | 7 +++++++ 2 files changed, 19 insertions(+) diff --git a/arch/arm/mach-tegra/include/mach/tegra20-car.h b/arch/arm/mach-tegra/include/mach/tegra20-car.h index d4cb238..d4ff6fb 100644 --- a/arch/arm/mach-tegra/include/mach/tegra20-car.h +++ b/arch/arm/mach-tegra/include/mach/tegra20-car.h @@ -53,6 +53,18 @@ #define CRC_SCLK_BURST_POLICY_SYS_STATE_RUN 2 #define CRC_SCLK_BURST_POLICY_SYS_STATE_IDLE 1 #define CRC_SCLK_BURST_POLICY_SYS_STATE_STDBY 0 +#define CRC_SCLK_BURST_POLICY_FIQ_SRC_SHIFT 12 +#define CRC_SCLK_BURST_POLICY_IRQ_SRC_SHIFT 8 +#define CRC_SCLK_BURST_POLICY_RUN_SRC_SHIFT 4 +#define CRC_SCLK_BURST_POLICY_IDLE_SRC_SHIFT 0 +#define CRC_SCLK_BURST_POLICY_SRC_CLKM 0 +#define CRC_SCLK_BURST_POLICY_SRC_PLLC_OUT1 1 +#define CRC_SCLK_BURST_POLICY_SRC_PLLP_OUT4 2 +#define CRC_SCLK_BURST_POLICY_SRC_PLLP_OUT3 3 +#define CRC_SCLK_BURST_POLICY_SRC_PLLP_OUT2 4 +#define CRC_SCLK_BURST_POLICY_SRC_CLKD 5 +#define CRC_SCLK_BURST_POLICY_SRC_CLKS 6 +#define CRC_SCLK_BURST_POLICY_SRC_PLLM_OUT1 7 #define CRC_SUPER_SCLK_DIV 0x02c #define CRC_SUPER_SDIV_ENB (1 << 31) diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c index e70f99a..b94b7bc 100644 --- a/drivers/clk/tegra/clk-tegra20.c +++ b/drivers/clk/tegra/clk-tegra20.c @@ -325,6 +325,13 @@ static int tegra20_car_probe(struct device_d *dev) tegra_init_from_table(init_table, clks, clk_max); + /* speed up system bus */ + writel(CRC_SCLK_BURST_POLICY_SYS_STATE_RUN << + CRC_SCLK_BURST_POLICY_SYS_STATE_SHIFT | + CRC_SCLK_BURST_POLICY_SRC_PLLC_OUT1 << + CRC_SCLK_BURST_POLICY_RUN_SRC_SHIFT, + car_base + CRC_SCLK_BURST_POLICY); + clk_data.clks = clks; clk_data.clk_num = ARRAY_SIZE(clks); of_clk_add_provider(dev->device_node, of_clk_src_onecell_get, -- 1.8.3.1 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
