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litex_serial: use small lock in arch/risc-v/src/litex/litex_serial.c

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reason:
We hope to remove all instances of spin_lock_irqsave(NULL).

Signed-off-by: hujun5 <hujun5@xiaomi.com>
This commit is contained in:
hujun5 2024-12-09 21:53:10 +08:00 committed by Xiang Xiao
parent 7e5088f4ea
commit 3063f2c0e0
1 changed files with 6 additions and 4 deletions
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10
arch/risc-v/src/litex/litex_serial.c
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@ -124,6 +124,7 @@ struct up_dev_s
uintptr_t uartbase; /* Base address of UART registers */
uint32_t baud; /* Configured baud */
uint8_t irq; /* IRQ associated with this UART */
spinlock_t lock; /* Spinlock */
uint8_t im; /* Interrupt mask state */
};
@ -190,6 +191,7 @@ static struct up_dev_s g_uart0priv =
.uartbase = LITEX_UART0_BASE,
.baud = CONFIG_UART0_BAUD,
.irq = LITEX_IRQ_UART0,
.lock = SP_UNLOCKED,
};
static uart_dev_t g_uart0port =
@ -240,7 +242,7 @@ static void up_serialout(struct up_dev_s *priv, int offset, uint32_t value)
static void up_restoreuartint(struct up_dev_s *priv, uint8_t im)
{
irqstate_t flags = spin_lock_irqsave(NULL);
irqstate_t flags = spin_lock_irqsave(&priv->lock);
priv->im = im;
@ -248,7 +250,7 @@ static void up_restoreuartint(struct up_dev_s *priv, uint8_t im)
LITEX_CONSOLE_BASE + UART_EV_PENDING_OFFSET);
up_serialout(priv, UART_EV_ENABLE_OFFSET, im);
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
/****************************************************************************
@ -257,7 +259,7 @@ static void up_restoreuartint(struct up_dev_s *priv, uint8_t im)
static void up_disableuartint(struct up_dev_s *priv, uint8_t *im)
{
irqstate_t flags = spin_lock_irqsave(NULL);
irqstate_t flags = spin_lock_irqsave(&priv->lock);
/* Return the current interrupt mask value */
@ -274,7 +276,7 @@ static void up_disableuartint(struct up_dev_s *priv, uint8_t *im)
LITEX_CONSOLE_BASE + UART_EV_PENDING_OFFSET);
up_serialout(priv, UART_EV_ENABLE_OFFSET, 0);
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
/****************************************************************************