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From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Suman Anna <s-anna@ti.com>, Sekhar Nori <nsekhar@ti.com>,
	Kevin Hilman <khilman@kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Russell King <linux@armlinux.org.uk>,
	David Lechner <david@lechnology.com>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>, Ohad Ben-Cohen <ohad@wizery.com>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Philipp Zabel <p.zabel@pengutronix.de>
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
	linux-remoteproc@vger.kernel.org,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v6 6/7] remoteproc/davinci: use the reset framework
Date: Tue, 17 Apr 2018 19:30:37 +0200	[thread overview]
Message-ID: <20180417173038.25510-7-brgl@bgdev.pl> (raw)
In-Reply-To: <20180417173038.25510-1-brgl@bgdev.pl>

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Switch to using the reset framework instead of handcoded reset routines
we used so far.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/remoteproc/da8xx_remoteproc.c | 34 +++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
index b668e32996e2..76c06b70a1c6 100644
--- a/drivers/remoteproc/da8xx_remoteproc.c
+++ b/drivers/remoteproc/da8xx_remoteproc.c
@@ -10,6 +10,7 @@
 
 #include <linux/bitops.h>
 #include <linux/clk.h>
+#include <linux/reset.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -20,8 +21,6 @@
 #include <linux/platform_device.h>
 #include <linux/remoteproc.h>
 
-#include <mach/clock.h>   /* for davinci_clk_reset_assert/deassert() */
-
 #include "remoteproc_internal.h"
 
 static char *da8xx_fw_name;
@@ -72,6 +71,7 @@ struct da8xx_rproc {
 	struct da8xx_rproc_mem *mem;
 	int num_mems;
 	struct clk *dsp_clk;
+	struct reset_control *dsp_reset;
 	void (*ack_fxn)(struct irq_data *data);
 	struct irq_data *irq_data;
 	void __iomem *chipsig;
@@ -138,6 +138,7 @@ static int da8xx_rproc_start(struct rproc *rproc)
 	struct device *dev = rproc->dev.parent;
 	struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
 	struct clk *dsp_clk = drproc->dsp_clk;
+	struct reset_control *dsp_reset = drproc->dsp_reset;
 	int ret;
 
 	/* hw requires the start (boot) address be on 1KB boundary */
@@ -155,7 +156,12 @@ static int da8xx_rproc_start(struct rproc *rproc)
 		return ret;
 	}
 
-	davinci_clk_reset_deassert(dsp_clk);
+	ret = reset_control_deassert(dsp_reset);
+	if (ret) {
+		dev_err(dev, "reset_control_deassert() failed: %d\n", ret);
+		clk_disable_unprepare(dsp_clk);
+		return ret;
+	}
 
 	return 0;
 }
@@ -163,8 +169,15 @@ static int da8xx_rproc_start(struct rproc *rproc)
 static int da8xx_rproc_stop(struct rproc *rproc)
 {
 	struct da8xx_rproc *drproc = rproc->priv;
+	struct device *dev = rproc->dev.parent;
+	int ret;
+
+	ret = reset_control_assert(drproc->dsp_reset);
+	if (ret) {
+		dev_err(dev, "reset_control_assert() failed: %d\n", ret);
+		return ret;
+	}
 
-	davinci_clk_reset_assert(drproc->dsp_clk);
 	clk_disable_unprepare(drproc->dsp_clk);
 
 	return 0;
@@ -232,6 +245,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	struct resource *bootreg_res;
 	struct resource *chipsig_res;
 	struct clk *dsp_clk;
+	struct reset_control *dsp_reset;
 	void __iomem *chipsig;
 	void __iomem *bootreg;
 	int irq;
@@ -268,6 +282,15 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 		return PTR_ERR(dsp_clk);
 	}
 
+	dsp_reset = devm_reset_control_get_exclusive(dev, NULL);
+	if (IS_ERR(dsp_reset)) {
+		if (PTR_ERR(dsp_reset) != -EPROBE_DEFER)
+			dev_err(dev, "unable to get reset control: %ld\n",
+				PTR_ERR(dsp_reset));
+
+		return PTR_ERR(dsp_reset);
+	}
+
 	if (dev->of_node) {
 		ret = of_reserved_mem_device_init(dev);
 		if (ret) {
@@ -287,6 +310,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	drproc = rproc->priv;
 	drproc->rproc = rproc;
 	drproc->dsp_clk = dsp_clk;
+	drproc->dsp_reset = dsp_reset;
 	rproc->has_iommu = false;
 
 	ret = da8xx_rproc_get_internal_memories(pdev, drproc);
@@ -309,7 +333,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	 * *not* in reset, but da8xx_rproc_start() needs the DSP to be
 	 * held in reset at the time it is called.
 	 */
-	ret = davinci_clk_reset_assert(drproc->dsp_clk);
+	ret = reset_control_assert(dsp_reset);
 	if (ret)
 		goto free_rproc;
 
-- 
2.17.0

  parent reply	other threads:[~2018-04-17 17:31 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-17 17:30 [PATCH v6 0/7] ARM: davinci: complete the conversion to using " Bartosz Golaszewski
2018-04-17 17:30 ` [PATCH v6 1/7] ARM: davinci: dts: make psc0 a reset provider Bartosz Golaszewski
2018-04-17 17:30 ` [PATCH v6 2/7] ARM: davinci: dts: add a reset control to the dsp node Bartosz Golaszewski
2018-04-17 17:30 ` [PATCH v6 3/7] remoteproc/davinci: add the missing retval check for clk_enable() Bartosz Golaszewski
2018-04-18  5:04   ` Sekhar Nori
2018-04-17 17:30 ` [PATCH v6 4/7] remoteproc/davinci: prepare and unprepare the clock where needed Bartosz Golaszewski
2018-04-18  5:27   ` Sekhar Nori
2018-04-18  8:03     ` Bartosz Golaszewski
2018-04-17 17:30 ` [PATCH v6 5/7] remoteproc/davinci: use octal permissions for module_param() Bartosz Golaszewski
2018-04-18  5:30   ` Sekhar Nori
2018-04-27 17:11   ` Suman Anna
2018-04-17 17:30 ` Bartosz Golaszewski [this message]
2018-04-18  5:44   ` [PATCH v6 6/7] remoteproc/davinci: use the reset framework Sekhar Nori
2018-04-18  8:56     ` Bartosz Golaszewski
2018-04-18  8:50   ` Philipp Zabel
2018-04-17 17:30 ` [PATCH v6 7/7] clk: davinci: kill davinci_clk_reset_assert/deassert() Bartosz Golaszewski
2018-05-01 10:52 ` [PATCH v6 0/7] ARM: davinci: complete the conversion to using the reset framework Sekhar Nori

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