On Wed, Jul 31, 2019 at 3:07 PM Igor Opaniuk igor.opaniuk@gmail.com wrote:
From: Dominik Sliwa dominik.sliwa@toradex.com
When mainline kernels reboot TK1 they use SW_RESET, that reset mode does not reset PMIC. Some rails need to be off for RAM Re-repair to work correctly.
Signed-off-by: Dominik Sliwa dominik.sliwa@toradex.com Signed-off-by: Igor Opaniuk igor.opaniuk@toradex.com
Reviewed-by: Oleksandr Suvorov oleksandr.suvorov@toradex.com
arch/arm/mach-tegra/tegra124/cpu.c | 45 ++++++++++++++++++++++++++ board/toradex/apalis-tk1/as3722_init.c | 23 +++++++++++++ 2 files changed, 68 insertions(+)
diff --git a/arch/arm/mach-tegra/tegra124/cpu.c b/arch/arm/mach-tegra/tegra124/cpu.c index 992c0beb04..abc050c27b 100644 --- a/arch/arm/mach-tegra/tegra124/cpu.c +++ b/arch/arm/mach-tegra/tegra124/cpu.c @@ -238,6 +238,45 @@ static bool is_partition_powered(u32 partid) return !!(reg & (1 << partid)); }
+static void unpower_partition(u32 partid) +{
struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;debug("%s: part ID = %08X\n", __func__, partid);/* Is the partition on? */if (is_partition_powered(partid)) {/* Yes, toggle the partition power state (ON -> OFF) */debug("power_partition, toggling state\n");writel(START_CP | partid, &pmc->pmc_pwrgate_toggle);/* Wait for the power to come down */while (is_partition_powered(partid));/* Give I/O signals time to stabilize */udelay(IO_STABILIZATION_DELAY);}+}
+void unpower_cpus(void) +{
debug("%s entry: G cluster\n", __func__);/* Power down the fast cluster rail partition */debug("%s: CRAIL\n", __func__);unpower_partition(CRAIL);/* Power down the fast cluster non-CPU partition */debug("%s: C0NC\n", __func__);unpower_partition(C0NC);/* Power down the fast cluster CPU0 partition */debug("%s: CE0\n", __func__);unpower_partition(CE0);debug("%s: done\n", __func__);+}
static void power_partition(u32 partid) { struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; @@ -284,6 +323,12 @@ void start_cpu(u32 reset_vector)
debug("%s entry, reset_vector = %x\n", __func__, reset_vector);
/** High power clusters are on after software reset,* it may interfere with tegra124_ram_repair.* unpower them.*/unpower_cpus(); tegra124_init_clocks(); /* Set power-gating timer multiplier */diff --git a/board/toradex/apalis-tk1/as3722_init.c b/board/toradex/apalis-tk1/as3722_init.c index bd754e5fcf..15f8dce2f1 100644 --- a/board/toradex/apalis-tk1/as3722_init.c +++ b/board/toradex/apalis-tk1/as3722_init.c @@ -43,6 +43,29 @@ void pmic_enable_cpu_vdd(void) udelay(10 * 1000); #endif
/** Make sure all non-fused regulators are down.* That way we're in known state after software reboot from linux*/tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);tegra_i2c_ll_write_data(0x0003, I2C_SEND_2_BYTES);udelay(10 * 1000);tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);tegra_i2c_ll_write_data(0x0004, I2C_SEND_2_BYTES);udelay(10 * 1000);tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);tegra_i2c_ll_write_data(0x001b, I2C_SEND_2_BYTES);udelay(10 * 1000);tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);tegra_i2c_ll_write_data(0x0014, I2C_SEND_2_BYTES);udelay(10 * 1000);tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);tegra_i2c_ll_write_data(0x001a, I2C_SEND_2_BYTES);udelay(10 * 1000);tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);tegra_i2c_ll_write_data(0x0019, I2C_SEND_2_BYTES);udelay(10 * 1000);debug("%s: Setting VDD_CPU to 1.0V via AS3722 reg 0/4D\n", __func__); /* * Bring up VDD_CPU via the AS3722 PMIC on the PWR I2C bus.-- 2.17.1
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