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usb: gadget: tegra-xudc: Do not program SPARAM
[ Upstream commit 62fb61580e
]
According to the Tegra Technical Reference Manual, SPARAM
is a read-only register and should not be programmed in
the driver.
The change removes the wrong SPARAM usage.
Signed-off-by: Wayne Chang <waynec@nvidia.com>
Link: https://lore.kernel.org/r/20220107090443.149021-1-waynec@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 0 additions and 8 deletions
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@ -32,9 +32,6 @@
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#include <linux/workqueue.h>
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/* XUSB_DEV registers */
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#define SPARAM 0x000
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#define SPARAM_ERSTMAX_MASK GENMASK(20, 16)
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#define SPARAM_ERSTMAX(x) (((x) << 16) & SPARAM_ERSTMAX_MASK)
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#define DB 0x004
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#define DB_TARGET_MASK GENMASK(15, 8)
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#define DB_TARGET(x) (((x) << 8) & DB_TARGET_MASK)
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@ -3295,11 +3292,6 @@ static void tegra_xudc_init_event_ring(struct tegra_xudc *xudc)
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unsigned int i;
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u32 val;
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val = xudc_readl(xudc, SPARAM);
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val &= ~(SPARAM_ERSTMAX_MASK);
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val |= SPARAM_ERSTMAX(XUDC_NR_EVENT_RINGS);
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xudc_writel(xudc, val, SPARAM);
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for (i = 0; i < ARRAY_SIZE(xudc->event_ring); i++) {
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memset(xudc->event_ring[i], 0, XUDC_EVENT_RING_SIZE *
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sizeof(*xudc->event_ring[i]));
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