From: Vince Hsu <vinceh@xxxxxxxxxx> Tegra114 has a HW bug where the PLLD/PLLD2 lock bit cannot be asserted while turning on the Display power domain and before the clamp to this domain has been removed. This issue causes a timeout and aborts the power up sequence, even though the PLLD/PLLD2 has already locked. To avoid this, don't use the lock for PLLD/PLLD2, just wait 1ms and treat the clocks as locked. Signed-off-by: Vince Hsu <vinceh@xxxxxxxxxx> [jonathanh@xxxxxxxxxx: Updated the changelog description] Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx> Acked-by: Peter De Schrijver <pdeschrijver@xxxxxxxxxx> --- I had originally sent this as part of the tegra generic power-domain series [0]. However, given that this is really a standalone fix and the power-domain work is on-going, I don't see any reason why this should not be merged now. [0] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/356060.html drivers/clk/tegra/clk-tegra114.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c index db5871519bf5..6c824e469a1b 100644 --- a/drivers/clk/tegra/clk-tegra114.c +++ b/drivers/clk/tegra/clk-tegra114.c @@ -454,8 +454,7 @@ static struct tegra_clk_pll_params pll_d_params = { .lock_delay = 1000, .div_nmp = &pllp_nmp, .freq_table = pll_d_freq_table, - .flags = TEGRA_PLL_HAS_CPCON | TEGRA_PLL_SET_LFCON | - TEGRA_PLL_USE_LOCK, + .flags = TEGRA_PLL_HAS_CPCON | TEGRA_PLL_SET_LFCON, }; static struct tegra_clk_pll_params pll_d2_params = { @@ -472,8 +471,7 @@ static struct tegra_clk_pll_params pll_d2_params = { .lock_delay = 1000, .div_nmp = &pllp_nmp, .freq_table = pll_d_freq_table, - .flags = TEGRA_PLL_HAS_CPCON | TEGRA_PLL_SET_LFCON | - TEGRA_PLL_USE_LOCK, + .flags = TEGRA_PLL_HAS_CPCON | TEGRA_PLL_SET_LFCON, }; static struct pdiv_map pllu_p[] = { -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
