From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754446Ab1BMJoS (ORCPT ); Sun, 13 Feb 2011 04:44:18 -0500 Received: from smtp-out.google.com ([216.239.44.51]:9890 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754040Ab1BMJnE (ORCPT ); Sun, 13 Feb 2011 04:43:04 -0500 From: Colin Cross To: linux-tegra@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, konkers@android.com, olof@lixom.net, Colin Cross , Russell King , linux-kernel@vger.kernel.org Subject: [PATCH 20/21] ARM: tegra: clock: Fix clock issues in suspend Date: Sun, 13 Feb 2011 01:40:32 -0800 Message-Id: <1297590033-15035-21-git-send-email-ccross@android.com> X-Mailer: git-send-email 1.7.3.1 In-Reply-To: <1297590033-15035-1-git-send-email-ccross@android.com> References: <1297590033-15035-1-git-send-email-ccross@android.com> X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The PLLP registers are now being restored by the low-level resume code, and the CPU may be running off PLLP, so don't touch them during clock resume. Save plld, plls, pllu, and audio clock during suspend (originally fixed by Mayuresh Kulkarni ) The lock time for plld is 1000 us, so increase the delay after setting the PLLs. Add a BUG_ON to ensure the size of the suspend context area is correct. Signed-off-by: Colin Cross --- arch/arm/mach-tegra/tegra2_clocks.c | 30 ++++++++++++++++++++---------- 1 files changed, 20 insertions(+), 10 deletions(-) diff --git a/arch/arm/mach-tegra/tegra2_clocks.c b/arch/arm/mach-tegra/tegra2_clocks.c index bfc9792..00e348a 100644 --- a/arch/arm/mach-tegra/tegra2_clocks.c +++ b/arch/arm/mach-tegra/tegra2_clocks.c @@ -2215,7 +2215,7 @@ void __init tegra2_init_clocks(void) #ifdef CONFIG_PM static u32 clk_rst_suspend[RST_DEVICES_NUM + CLK_OUT_ENB_NUM + - PERIPH_CLK_SOURCE_NUM + 19]; + PERIPH_CLK_SOURCE_NUM + 22]; void tegra_clk_suspend(void) { @@ -2223,16 +2223,18 @@ void tegra_clk_suspend(void) u32 *ctx = clk_rst_suspend; *ctx++ = clk_readl(OSC_CTRL) & OSC_CTRL_MASK; - *ctx++ = clk_readl(tegra_pll_p.reg + PLL_BASE); - *ctx++ = clk_readl(tegra_pll_p.reg + PLL_MISC(&tegra_pll_p)); *ctx++ = clk_readl(tegra_pll_c.reg + PLL_BASE); *ctx++ = clk_readl(tegra_pll_c.reg + PLL_MISC(&tegra_pll_c)); *ctx++ = clk_readl(tegra_pll_a.reg + PLL_BASE); *ctx++ = clk_readl(tegra_pll_a.reg + PLL_MISC(&tegra_pll_a)); + *ctx++ = clk_readl(tegra_pll_s.reg + PLL_BASE); + *ctx++ = clk_readl(tegra_pll_s.reg + PLL_MISC(&tegra_pll_s)); + *ctx++ = clk_readl(tegra_pll_d.reg + PLL_BASE); + *ctx++ = clk_readl(tegra_pll_d.reg + PLL_MISC(&tegra_pll_d)); + *ctx++ = clk_readl(tegra_pll_u.reg + PLL_BASE); + *ctx++ = clk_readl(tegra_pll_u.reg + PLL_MISC(&tegra_pll_u)); *ctx++ = clk_readl(tegra_pll_m_out1.reg); - *ctx++ = clk_readl(tegra_pll_p_out1.reg); - *ctx++ = clk_readl(tegra_pll_p_out3.reg); *ctx++ = clk_readl(tegra_pll_a_out0.reg); *ctx++ = clk_readl(tegra_pll_c_out1.reg); @@ -2243,6 +2245,8 @@ void tegra_clk_suspend(void) *ctx++ = clk_readl(tegra_clk_sclk.reg + SUPER_CLK_DIVIDER); *ctx++ = clk_readl(tegra_clk_pclk.reg); + *ctx++ = clk_readl(tegra_clk_audio.reg); + for (off = PERIPH_CLK_SOURCE_I2S1; off <= PERIPH_CLK_SOURCE_OSC; off += 4) { if (off == PERIPH_CLK_SOURCE_EMC) @@ -2260,6 +2264,8 @@ void tegra_clk_suspend(void) *ctx++ = clk_readl(MISC_CLK_ENB); *ctx++ = clk_readl(CLK_MASK_ARM); + + BUG_ON(ctx - clk_rst_suspend != ARRAY_SIZE(clk_rst_suspend)); } void tegra_clk_resume(void) @@ -2272,17 +2278,19 @@ void tegra_clk_resume(void) val |= *ctx++; clk_writel(val, OSC_CTRL); - clk_writel(*ctx++, tegra_pll_p.reg + PLL_BASE); - clk_writel(*ctx++, tegra_pll_p.reg + PLL_MISC(&tegra_pll_p)); clk_writel(*ctx++, tegra_pll_c.reg + PLL_BASE); clk_writel(*ctx++, tegra_pll_c.reg + PLL_MISC(&tegra_pll_c)); clk_writel(*ctx++, tegra_pll_a.reg + PLL_BASE); clk_writel(*ctx++, tegra_pll_a.reg + PLL_MISC(&tegra_pll_a)); - udelay(300); + clk_writel(*ctx++, tegra_pll_s.reg + PLL_BASE); + clk_writel(*ctx++, tegra_pll_s.reg + PLL_MISC(&tegra_pll_s)); + clk_writel(*ctx++, tegra_pll_d.reg + PLL_BASE); + clk_writel(*ctx++, tegra_pll_d.reg + PLL_MISC(&tegra_pll_d)); + clk_writel(*ctx++, tegra_pll_u.reg + PLL_BASE); + clk_writel(*ctx++, tegra_pll_u.reg + PLL_MISC(&tegra_pll_u)); + udelay(1000); clk_writel(*ctx++, tegra_pll_m_out1.reg); - clk_writel(*ctx++, tegra_pll_p_out1.reg); - clk_writel(*ctx++, tegra_pll_p_out3.reg); clk_writel(*ctx++, tegra_pll_a_out0.reg); clk_writel(*ctx++, tegra_pll_c_out1.reg); @@ -2293,6 +2301,8 @@ void tegra_clk_resume(void) clk_writel(*ctx++, tegra_clk_sclk.reg + SUPER_CLK_DIVIDER); clk_writel(*ctx++, tegra_clk_pclk.reg); + clk_writel(*ctx++, tegra_clk_audio.reg); + /* enable all clocks before configuring clock sources */ clk_writel(0xbffffff9ul, CLK_OUT_ENB); clk_writel(0xfefffff7ul, CLK_OUT_ENB + 4); -- 1.7.3.1