From: "Álvaro Fernández Rojas" <noltari@gmail.com> To: broonie@kernel.org, f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, p.zabel@pengutronix.de, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: "Álvaro Fernández Rojas" <noltari@gmail.com> Subject: [PATCH v4 2/2] spi: bcm63xx-hsspi: add reset support Date: Tue, 16 Jun 2020 19:32:35 +0200 [thread overview] Message-ID: <20200616173235.3473149-3-noltari@gmail.com> (raw) In-Reply-To: <20200616173235.3473149-1-noltari@gmail.com> bcm63xx arch resets the HSSPI controller at early boot. However, bmips arch needs to perform a reset when probing the driver. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> --- v4: simplify devm_reset_control_get_optional_exclusive return handling v3: use devm_reset_control_get_optional_exclusive v2: use devm_reset_control_get_exclusive drivers/spi/spi-bcm63xx-hsspi.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c index 6c235306c0e4..9909b18f3c5a 100644 --- a/drivers/spi/spi-bcm63xx-hsspi.c +++ b/drivers/spi/spi-bcm63xx-hsspi.c @@ -20,6 +20,7 @@ #include <linux/spi/spi.h> #include <linux/mutex.h> #include <linux/of.h> +#include <linux/reset.h> #define HSSPI_GLOBAL_CTRL_REG 0x0 #define GLOBAL_CTRL_CS_POLARITY_SHIFT 0 @@ -334,6 +335,7 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev) struct clk *clk, *pll_clk = NULL; int irq, ret; u32 reg, rate, num_cs = HSSPI_SPI_MAX_CS; + struct reset_control *reset; irq = platform_get_irq(pdev, 0); if (irq < 0) @@ -348,10 +350,20 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev) if (IS_ERR(clk)) return PTR_ERR(clk); + reset = devm_reset_control_get_optional_exclusive(dev, NULL); + if (IS_ERR(reset)) + return PTR_ERR(reset); + ret = clk_prepare_enable(clk); if (ret) return ret; + ret = reset_control_reset(reset); + if (ret) { + dev_err(dev, "unable to reset device: %d\n", ret); + goto out_disable_clk; + } + rate = clk_get_rate(clk); if (!rate) { pll_clk = devm_clk_get(dev, "pll"); -- 2.27.0
WARNING: multiple messages have this Message-ID (diff)
From: "Álvaro Fernández Rojas" <noltari@gmail.com> To: broonie@kernel.org, f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, p.zabel@pengutronix.de, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: "Álvaro Fernández Rojas" <noltari@gmail.com> Subject: [PATCH v4 2/2] spi: bcm63xx-hsspi: add reset support Date: Tue, 16 Jun 2020 19:32:35 +0200 [thread overview] Message-ID: <20200616173235.3473149-3-noltari@gmail.com> (raw) In-Reply-To: <20200616173235.3473149-1-noltari@gmail.com> bcm63xx arch resets the HSSPI controller at early boot. However, bmips arch needs to perform a reset when probing the driver. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> --- v4: simplify devm_reset_control_get_optional_exclusive return handling v3: use devm_reset_control_get_optional_exclusive v2: use devm_reset_control_get_exclusive drivers/spi/spi-bcm63xx-hsspi.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c index 6c235306c0e4..9909b18f3c5a 100644 --- a/drivers/spi/spi-bcm63xx-hsspi.c +++ b/drivers/spi/spi-bcm63xx-hsspi.c @@ -20,6 +20,7 @@ #include <linux/spi/spi.h> #include <linux/mutex.h> #include <linux/of.h> +#include <linux/reset.h> #define HSSPI_GLOBAL_CTRL_REG 0x0 #define GLOBAL_CTRL_CS_POLARITY_SHIFT 0 @@ -334,6 +335,7 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev) struct clk *clk, *pll_clk = NULL; int irq, ret; u32 reg, rate, num_cs = HSSPI_SPI_MAX_CS; + struct reset_control *reset; irq = platform_get_irq(pdev, 0); if (irq < 0) @@ -348,10 +350,20 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev) if (IS_ERR(clk)) return PTR_ERR(clk); + reset = devm_reset_control_get_optional_exclusive(dev, NULL); + if (IS_ERR(reset)) + return PTR_ERR(reset); + ret = clk_prepare_enable(clk); if (ret) return ret; + ret = reset_control_reset(reset); + if (ret) { + dev_err(dev, "unable to reset device: %d\n", ret); + goto out_disable_clk; + } + rate = clk_get_rate(clk); if (!rate) { pll_clk = devm_clk_get(dev, "pll"); -- 2.27.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-06-16 17:32 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-16 17:32 [PATCH v4 0/2] spi: bcm63xx: add BMIPS support Álvaro Fernández Rojas 2020-06-16 17:32 ` Álvaro Fernández Rojas 2020-06-16 17:32 ` [PATCH v4 1/2] spi: bcm63xx-spi: add reset support Álvaro Fernández Rojas 2020-06-16 17:32 ` Álvaro Fernández Rojas 2020-06-16 17:32 ` Álvaro Fernández Rojas [this message] 2020-06-16 17:32 ` [PATCH v4 2/2] spi: bcm63xx-hsspi: " Álvaro Fernández Rojas 2020-06-17 16:36 ` [PATCH v4 0/2] spi: bcm63xx: add BMIPS support Mark Brown
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