From 85c675d0d09a45a135bddd15d7b385f8758c32fb Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 18 May 2024 19:35:05 +0200 Subject: Adding upstream version 6.7.7. Signed-off-by: Daniel Baumann --- drivers/tty/serial/8250/8250_bcm7271.c | 69 +++++++++++++++------------------- 1 file changed, 30 insertions(+), 39 deletions(-) (limited to 'drivers/tty/serial/8250/8250_bcm7271.c') diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/8250/8250_bcm7271.c index aa5aff0467..55dea2539c 100644 --- a/drivers/tty/serial/8250/8250_bcm7271.c +++ b/drivers/tty/serial/8250/8250_bcm7271.c @@ -567,7 +567,7 @@ static irqreturn_t brcmuart_isr(int irq, void *dev_id) if (interrupts == 0) return IRQ_NONE; - spin_lock_irqsave(&up->lock, flags); + uart_port_lock_irqsave(up, &flags); /* Clear all interrupts */ udma_writel(priv, REGS_DMA_ISR, UDMA_INTR_CLEAR, interrupts); @@ -581,7 +581,7 @@ static irqreturn_t brcmuart_isr(int irq, void *dev_id) if ((rval | tval) == 0) dev_warn(dev, "Spurious interrupt: 0x%x\n", interrupts); - spin_unlock_irqrestore(&up->lock, flags); + uart_port_unlock_irqrestore(up, flags); return IRQ_HANDLED; } @@ -608,10 +608,10 @@ static int brcmuart_startup(struct uart_port *port) * * Synchronize UART_IER access against the console. */ - spin_lock_irq(&port->lock); + uart_port_lock_irq(port); up->ier &= ~UART_IER_RDI; serial_port_out(port, UART_IER, up->ier); - spin_unlock_irq(&port->lock); + uart_port_unlock_irq(port); priv->tx_running = false; priv->dma.rx_dma = NULL; @@ -629,7 +629,7 @@ static void brcmuart_shutdown(struct uart_port *port) struct brcmuart_priv *priv = up->port.private_data; unsigned long flags; - spin_lock_irqsave(&port->lock, flags); + uart_port_lock_irqsave(port, &flags); priv->shutdown = true; if (priv->dma_enabled) { stop_rx_dma(up); @@ -645,7 +645,7 @@ static void brcmuart_shutdown(struct uart_port *port) */ up->dma = NULL; - spin_unlock_irqrestore(&port->lock, flags); + uart_port_unlock_irqrestore(port, flags); serial8250_do_shutdown(port); } @@ -788,7 +788,7 @@ static int brcmuart_handle_irq(struct uart_port *p) * interrupt but there is no data ready. */ if (((iir & UART_IIR_ID) == UART_IIR_RX_TIMEOUT) && !(priv->shutdown)) { - spin_lock_irqsave(&p->lock, flags); + uart_port_lock_irqsave(p, &flags); status = serial_port_in(p, UART_LSR); if ((status & UART_LSR_DR) == 0) { @@ -813,7 +813,7 @@ static int brcmuart_handle_irq(struct uart_port *p) handled = 1; } - spin_unlock_irqrestore(&p->lock, flags); + uart_port_unlock_irqrestore(p, flags); if (handled) return 1; } @@ -831,7 +831,7 @@ static enum hrtimer_restart brcmuart_hrtimer_func(struct hrtimer *t) if (priv->shutdown) return HRTIMER_NORESTART; - spin_lock_irqsave(&p->lock, flags); + uart_port_lock_irqsave(p, &flags); status = serial_port_in(p, UART_LSR); /* @@ -855,7 +855,7 @@ static enum hrtimer_restart brcmuart_hrtimer_func(struct hrtimer *t) status |= UART_MCR_RTS; serial_port_out(p, UART_MCR, status); } - spin_unlock_irqrestore(&p->lock, flags); + uart_port_unlock_irqrestore(p, flags); return HRTIMER_NORESTART; } @@ -984,10 +984,9 @@ static int brcmuart_probe(struct platform_device *pdev) } /* We should have just the uart base registers or all the registers */ - if (x != 1 && x != REGS_MAX) { - dev_warn(dev, "%s registers not specified\n", reg_names[x]); - return -EINVAL; - } + if (x != 1 && x != REGS_MAX) + return dev_err_probe(dev, -EINVAL, "%s registers not specified\n", + reg_names[x]); /* if the DMA registers were specified, try to enable DMA */ if (x > REGS_DMA_RX) { @@ -1016,27 +1015,23 @@ static int brcmuart_probe(struct platform_device *pdev) of_property_read_u32(np, "clock-frequency", &clk_rate); /* See if a Baud clock has been specified */ - baud_mux_clk = devm_clk_get(dev, "sw_baud"); - if (IS_ERR(baud_mux_clk)) { - if (PTR_ERR(baud_mux_clk) == -EPROBE_DEFER) { - ret = -EPROBE_DEFER; - goto release_dma; - } - dev_dbg(dev, "BAUD MUX clock not specified\n"); - } else { + baud_mux_clk = devm_clk_get_optional_enabled(dev, "sw_baud"); + ret = PTR_ERR_OR_ZERO(baud_mux_clk); + if (ret) + goto release_dma; + if (baud_mux_clk) { dev_dbg(dev, "BAUD MUX clock found\n"); - ret = clk_prepare_enable(baud_mux_clk); - if (ret) - goto release_dma; + priv->baud_mux_clk = baud_mux_clk; init_real_clk_rates(dev, priv); clk_rate = priv->default_mux_rate; + } else { + dev_dbg(dev, "BAUD MUX clock not specified\n"); } if (clk_rate == 0) { - dev_err(dev, "clock-frequency or clk not defined\n"); - ret = -EINVAL; - goto err_clk_disable; + ret = dev_err_probe(dev, -EINVAL, "clock-frequency or clk not defined\n"); + goto release_dma; } dev_dbg(dev, "DMA is %senabled\n", priv->dma_enabled ? "" : "not "); @@ -1093,7 +1088,7 @@ static int brcmuart_probe(struct platform_device *pdev) ret = serial8250_register_8250_port(&up); if (ret < 0) { - dev_err(dev, "unable to register 8250 port\n"); + dev_err_probe(dev, ret, "unable to register 8250 port\n"); goto err; } priv->line = ret; @@ -1102,14 +1097,13 @@ static int brcmuart_probe(struct platform_device *pdev) if (priv->dma_enabled) { dma_irq = platform_get_irq_byname(pdev, "dma"); if (dma_irq < 0) { - ret = dma_irq; - dev_err(dev, "no IRQ resource info\n"); + ret = dev_err_probe(dev, dma_irq, "no IRQ resource info\n"); goto err1; } ret = devm_request_irq(dev, dma_irq, brcmuart_isr, IRQF_SHARED, "uart DMA irq", &new_port->port); if (ret) { - dev_err(dev, "unable to register IRQ handler\n"); + dev_err_probe(dev, ret, "unable to register IRQ handler\n"); goto err1; } } @@ -1121,8 +1115,6 @@ err1: serial8250_unregister_port(priv->line); err: brcmuart_free_bufs(dev, priv); -err_clk_disable: - clk_disable_unprepare(baud_mux_clk); release_dma: if (priv->dma_enabled) brcmuart_arbitration(priv, 0); @@ -1137,7 +1129,6 @@ static int brcmuart_remove(struct platform_device *pdev) hrtimer_cancel(&priv->hrt); serial8250_unregister_port(priv->line); brcmuart_free_bufs(&pdev->dev, priv); - clk_disable_unprepare(priv->baud_mux_clk); if (priv->dma_enabled) brcmuart_arbitration(priv, 0); return 0; @@ -1154,10 +1145,10 @@ static int __maybe_unused brcmuart_suspend(struct device *dev) * This will prevent resume from enabling RTS before the * baud rate has been restored. */ - spin_lock_irqsave(&port->lock, flags); + uart_port_lock_irqsave(port, &flags); priv->saved_mctrl = port->mctrl; port->mctrl &= ~TIOCM_RTS; - spin_unlock_irqrestore(&port->lock, flags); + uart_port_unlock_irqrestore(port, flags); serial8250_suspend_port(priv->line); clk_disable_unprepare(priv->baud_mux_clk); @@ -1196,10 +1187,10 @@ static int __maybe_unused brcmuart_resume(struct device *dev) if (priv->saved_mctrl & TIOCM_RTS) { /* Restore RTS */ - spin_lock_irqsave(&port->lock, flags); + uart_port_lock_irqsave(port, &flags); port->mctrl |= TIOCM_RTS; port->ops->set_mctrl(port, port->mctrl); - spin_unlock_irqrestore(&port->lock, flags); + uart_port_unlock_irqrestore(port, flags); } return 0; -- cgit v1.2.3