39 lines
1.2 KiB
Diff
39 lines
1.2 KiB
Diff
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From 730d2f3a41c5ccae71b5008fffdf697d143be68c Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Wed, 16 Mar 2016 20:44:51 +0100
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Subject: [PATCH] sunxi: Fix clock_twi_onoff for sun6i
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The clock_sun6i.c implementation was not deasserting the reset for
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the regular i2c controllers, this commit fixes this.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Acked-by: Ian Campbell <ijc@hellion.org.uk>
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---
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arch/arm/cpu/armv7/sunxi/clock_sun6i.c | 11 ++++++++---
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1 file changed, 8 insertions(+), 3 deletions(-)
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--- a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
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+++ b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
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@@ -100,13 +100,18 @@ int clock_twi_onoff(int port, int state)
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return 0;
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}
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- /* set the apb clock gate for twi */
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- if (state)
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+ /* set the apb clock gate and reset for twi */
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+ if (state) {
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setbits_le32(&ccm->apb2_gate,
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CLK_GATE_OPEN << (APB2_GATE_TWI_SHIFT+port));
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- else
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+ setbits_le32(&ccm->apb2_reset_cfg,
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+ 1 << (APB2_RESET_TWI_SHIFT + port));
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+ } else {
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+ clrbits_le32(&ccm->apb2_reset_cfg,
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+ 1 << (APB2_RESET_TWI_SHIFT + port));
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clrbits_le32(&ccm->apb2_gate,
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CLK_GATE_OPEN << (APB2_GATE_TWI_SHIFT+port));
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+ }
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return 0;
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}
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