From 50a212ec906f7524620675f0c57357691c26c81f Mon Sep 17 00:00:00 2001 From: hc <hc@nodka.com> Date: Wed, 16 Oct 2024 01:20:19 +0000 Subject: [PATCH] 修改GPIO导出默认初始值 --- kernel/drivers/clk/imx/clk-composite-8m.c | 12 +++++++----- 1 files changed, 7 insertions(+), 5 deletions(-) diff --git a/kernel/drivers/clk/imx/clk-composite-8m.c b/kernel/drivers/clk/imx/clk-composite-8m.c index 04e7285..75e0558 100644 --- a/kernel/drivers/clk/imx/clk-composite-8m.c +++ b/kernel/drivers/clk/imx/clk-composite-8m.c @@ -97,7 +97,7 @@ int prediv_value; int div_value; int ret; - u32 val; + u32 orig, val; ret = imx8m_clk_composite_compute_dividers(rate, parent_rate, &prediv_value, &div_value); @@ -106,13 +106,15 @@ spin_lock_irqsave(divider->lock, flags); - val = readl(divider->reg); - val &= ~((clk_div_mask(divider->width) << divider->shift) | - (clk_div_mask(PCG_DIV_WIDTH) << PCG_DIV_SHIFT)); + orig = readl(divider->reg); + val = orig & ~((clk_div_mask(divider->width) << divider->shift) | + (clk_div_mask(PCG_DIV_WIDTH) << PCG_DIV_SHIFT)); val |= (u32)(prediv_value - 1) << divider->shift; val |= (u32)(div_value - 1) << PCG_DIV_SHIFT; - writel(val, divider->reg); + + if (val != orig) + writel(val, divider->reg); spin_unlock_irqrestore(divider->lock, flags); -- Gitblit v1.6.2