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Signed-off-by: Ciprian Marian Costea --- .../bindings/serial/fsl,s32-linflexuart.yaml | 21 +++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.yaml b/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.yaml index 4171f524a928..45fcab9e186d 100644 --- a/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.yaml +++ b/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.yaml @@ -34,6 +34,14 @@ properties: interrupts: maxItems: 1 + clocks: + maxItems: 2 + + clock-names: + items: + - const: ipg + - const: lin + required: - compatible - reg @@ -48,3 +56,16 @@ examples: reg = <0x40053000 0x1000>; interrupts = <0 59 4>; }; + + - | + #include + #include + + serial@401c8000 { + compatible = "nxp,s32g2-linflexuart", + "fsl,s32v234-linflexuart"; + reg = <0x401c8000 0x3000>; + interrupts = ; + clocks = <&clks 14>, <&clks 13>; + clock-names = "lin", "ipg"; + }; From patchwork Tue Sep 24 14:12:47 2024 Content-Type: text/plain; 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It is used by S32G2 and S32G3 SoCs. Clocking support is added as optional in order to not break existing support for S32V234 SoC. Signed-off-by: Ciprian Marian Costea --- drivers/tty/serial/fsl_linflexuart.c | 67 +++++++++++++++++++++------- 1 file changed, 51 insertions(+), 16 deletions(-) diff --git a/drivers/tty/serial/fsl_linflexuart.c b/drivers/tty/serial/fsl_linflexuart.c index e972df4b188d..23aed3bbff6c 100644 --- a/drivers/tty/serial/fsl_linflexuart.c +++ b/drivers/tty/serial/fsl_linflexuart.c @@ -3,9 +3,10 @@ * Freescale LINFlexD UART serial port driver * * Copyright 2012-2016 Freescale Semiconductor, Inc. - * Copyright 2017-2019 NXP + * Copyright 2017-2019, 2024 NXP */ +#include #include #include #include @@ -120,6 +121,12 @@ #define PREINIT_DELAY 2000 /* us */ +struct linflex_port { + struct uart_port port; + struct clk *clk_lin; + struct clk *clk_ipg; +}; + static const struct of_device_id linflex_dt_ids[] = { { .compatible = "fsl,s32v234-linflexuart", @@ -807,12 +814,13 @@ static struct uart_driver linflex_reg = { static int linflex_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; + struct linflex_port *lfport; struct uart_port *sport; struct resource *res; int ret; - sport = devm_kzalloc(&pdev->dev, sizeof(*sport), GFP_KERNEL); - if (!sport) + lfport = devm_kzalloc(&pdev->dev, sizeof(*lfport), GFP_KERNEL); + if (!lfport) return -ENOMEM; ret = of_alias_get_id(np, "serial"); @@ -826,6 +834,7 @@ static int linflex_probe(struct platform_device *pdev) return -ENOMEM; } + sport = &lfport->port; sport->line = ret; sport->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &res); @@ -844,39 +853,65 @@ static int linflex_probe(struct platform_device *pdev) sport->flags = UPF_BOOT_AUTOCONF; sport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_FSL_LINFLEXUART_CONSOLE); - linflex_ports[sport->line] = sport; + lfport->clk_lin = devm_clk_get_optional_enabled(&pdev->dev, "lin"); + if (IS_ERR(lfport->clk_lin)) + return dev_err_probe(&pdev->dev, PTR_ERR(lfport->clk_lin), + "Failed to get linflexuart clk\n"); - platform_set_drvdata(pdev, sport); + lfport->clk_ipg = devm_clk_get_optional_enabled(&pdev->dev, "ipg"); + if (IS_ERR(lfport->clk_ipg)) + return dev_err_probe(&pdev->dev, PTR_ERR(lfport->clk_ipg), + "Failed to get linflexuart ipg clk\n"); + + linflex_ports[sport->line] = sport; + platform_set_drvdata(pdev, lfport); return uart_add_one_port(&linflex_reg, sport); } static void linflex_remove(struct platform_device *pdev) { - struct uart_port *sport = platform_get_drvdata(pdev); + struct linflex_port *lfport = platform_get_drvdata(pdev); - uart_remove_one_port(&linflex_reg, sport); + uart_remove_one_port(&linflex_reg, &lfport->port); } -#ifdef CONFIG_PM_SLEEP -static int linflex_suspend(struct device *dev) +static int __maybe_unused linflex_suspend(struct device *dev) { - struct uart_port *sport = dev_get_drvdata(dev); + struct linflex_port *lfport = dev_get_drvdata(dev); + + uart_suspend_port(&linflex_reg, &lfport->port); - uart_suspend_port(&linflex_reg, sport); + clk_disable_unprepare(lfport->clk_lin); + clk_disable_unprepare(lfport->clk_ipg); return 0; } -static int linflex_resume(struct device *dev) +static int __maybe_unused linflex_resume(struct device *dev) { - struct uart_port *sport = dev_get_drvdata(dev); + struct linflex_port *lfport = dev_get_drvdata(dev); + int ret; - uart_resume_port(&linflex_reg, sport); + if (lfport->clk_lin) { + ret = clk_prepare_enable(lfport->clk_lin); + if (ret) { + dev_err(dev, "Failed to enable linflexuart clk: %d\n", ret); + return ret; + } + } - return 0; + if (lfport->clk_ipg) { + ret = clk_prepare_enable(lfport->clk_ipg); + if (ret) { + dev_err(dev, "Failed to enable linflexuart ipg clk: %d\n", ret); + clk_disable_unprepare(lfport->clk_lin); + return ret; + } + } + + return uart_resume_port(&linflex_reg, &lfport->port); } -#endif static SIMPLE_DEV_PM_OPS(linflex_pm_ops, linflex_suspend, linflex_resume);