From e094de13ae78035c5642d5dfc65b07301765eebc Mon Sep 17 00:00:00 2001 From: David Lechner Date: Fri, 17 Nov 2023 14:12:56 -0600 Subject: [PATCH] spi: axi-spi-engine: use devm action to reset hw on remove This moves the reset of the hardware to a devm action in the AXI SPI Engine driver. This will allow us to use devm on later calls in the probe function while preserving the order during cleanup. Signed-off-by: David Lechner Link: https://lore.kernel.org/r/20231117-axi-spi-engine-series-1-v1-5-cc59db999b87@baylibre.com Signed-off-by: Mark Brown --- drivers/spi/spi-axi-spi-engine.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c index 77c1c115448d..c18a4b34777e 100644 --- a/drivers/spi/spi-axi-spi-engine.c +++ b/drivers/spi/spi-axi-spi-engine.c @@ -461,6 +461,15 @@ static int spi_engine_transfer_one_message(struct spi_controller *host, return 0; } +static void spi_engine_release_hw(void *p) +{ + struct spi_engine *spi_engine = p; + + writel_relaxed(0xff, spi_engine->base + SPI_ENGINE_REG_INT_PENDING); + writel_relaxed(0x00, spi_engine->base + SPI_ENGINE_REG_INT_ENABLE); + writel_relaxed(0x01, spi_engine->base + SPI_ENGINE_REG_RESET); +} + static int spi_engine_probe(struct platform_device *pdev) { struct spi_engine *spi_engine; @@ -506,6 +515,11 @@ static int spi_engine_probe(struct platform_device *pdev) writel_relaxed(0xff, spi_engine->base + SPI_ENGINE_REG_INT_PENDING); writel_relaxed(0x00, spi_engine->base + SPI_ENGINE_REG_INT_ENABLE); + ret = devm_add_action_or_reset(&pdev->dev, spi_engine_release_hw, + spi_engine); + if (ret) + return ret; + ret = request_irq(irq, spi_engine_irq, 0, pdev->name, host); if (ret) return ret; @@ -532,16 +546,11 @@ err_free_irq: static void spi_engine_remove(struct platform_device *pdev) { struct spi_controller *host = platform_get_drvdata(pdev); - struct spi_engine *spi_engine = spi_controller_get_devdata(host); int irq = platform_get_irq(pdev, 0); spi_unregister_controller(host); free_irq(irq, host); - - writel_relaxed(0xff, spi_engine->base + SPI_ENGINE_REG_INT_PENDING); - writel_relaxed(0x00, spi_engine->base + SPI_ENGINE_REG_INT_ENABLE); - writel_relaxed(0x01, spi_engine->base + SPI_ENGINE_REG_RESET); } static const struct of_device_id spi_engine_match_table[] = {