linux-kernel - [PATCH v1 2/2] clk: tegra124: Remove lock-enable bit from PLLM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 12 Apr 2019 00:48:35 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Peter De Schrijver <pdeschrijver@...dia.com>,
        Prashant Gaikwad <pgaikwad@...dia.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>
Cc:     linux-clk@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/2] clk: tegra124: Remove lock-enable bit from PLLM

According to the Tegra124 TRM documentation, PLLM_MISC2 register doesn't
have the lock-enable bit as well as any other PLLM-related register. Hence
PLLM re-locking can't be initiated by software. The incorrect bit setting
should have been harmless since that bit is undefined according to TRM.

Tested-by: Steev Klimaszewski <steev@...i.org>
Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/clk/tegra/clk-tegra124.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/clk/tegra/clk-tegra124.c b/drivers/clk/tegra/clk-tegra124.c
index df0018f7bf7e..940592375583 100644
--- a/drivers/clk/tegra/clk-tegra124.c
+++ b/drivers/clk/tegra/clk-tegra124.c
@@ -413,7 +413,6 @@ static struct tegra_clk_pll_params pll_m_params = {
 	.base_reg = PLLM_BASE,
 	.misc_reg = PLLM_MISC,
 	.lock_mask = PLL_BASE_LOCK,
-	.lock_enable_bit_idx = PLL_MISC_LOCK_ENABLE,
 	.lock_delay = 300,
 	.max_p = 5,
 	.pdiv_tohw = pllm_p,
@@ -421,7 +420,7 @@ static struct tegra_clk_pll_params pll_m_params = {
 	.pmc_divnm_reg = PMC_PLLM_WB0_OVERRIDE,
 	.pmc_divp_reg = PMC_PLLM_WB0_OVERRIDE_2,
 	.freq_table = pll_m_freq_table,
-	.flags = TEGRA_PLL_USE_LOCK | TEGRA_PLL_HAS_LOCK_ENABLE,
+	.flags = TEGRA_PLL_USE_LOCK,
 };
 
 static struct tegra_clk_pll_freq_table pll_e_freq_table[] = {
-- 
2.21.0