From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Georgi Djakov <georgi.djakov@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
Peter De Schrijver <pdeschrijver@nvidia.com>,
MyungJoo Ham <myungjoo.ham@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Mikko Perttunen <cyndis@kapsi.fi>,
Viresh Kumar <vireshk@kernel.org>,
Peter Geis <pgwipeout@gmail.com>,
Nicolas Chauvet <kwizart@gmail.com>,
Krzysztof Kozlowski <krzk@kernel.org>
Cc: linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
devicetree@vger.kernel.org
Subject: [PATCH v6 28/52] memory: tegra: Add and use devm_tegra_get_memory_controller()
Date: Mon, 26 Oct 2020 01:17:11 +0300 [thread overview]
Message-ID: <20201025221735.3062-29-digetx@gmail.com> (raw)
In-Reply-To: <20201025221735.3062-1-digetx@gmail.com>
Multiple Tegra drivers need to retrieve Memory Controller and there is
duplication of the retrieval code among the drivers. This patch removes
the duplication and fixes put_device() which was missed in the duplicated
code.
EMC drivers now use new common devm_tegra_get_memory_controller() helper
instead of opencoding the MC retrieval.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/memory/tegra/mc.c | 48 ++++++++++++++++++++++++
drivers/memory/tegra/tegra124-emc.c | 18 ++-------
drivers/memory/tegra/tegra210-emc-core.c | 39 +++++--------------
drivers/memory/tegra/tegra30-emc.c | 18 ++-------
include/soc/tegra/mc.h | 10 +++++
5 files changed, 74 insertions(+), 59 deletions(-)
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c
index ec8403557ed4..12ea2c79205a 100644
--- a/drivers/memory/tegra/mc.c
+++ b/drivers/memory/tegra/mc.c
@@ -42,6 +42,54 @@ static const struct of_device_id tegra_mc_of_match[] = {
};
MODULE_DEVICE_TABLE(of, tegra_mc_of_match);
+static void tegra_mc_devm_action_put_device(void *data)
+{
+ struct tegra_mc *mc = data;
+
+ put_device(mc->dev);
+}
+
+/**
+ * devm_tegra_get_memory_controller() - get Tegra Memory Controller handle
+ * @dev: device pointer for the consumer device
+ *
+ * This function will search for the Memory Controller node in a device-tree
+ * and retrieve the Memory Controller handle.
+ *
+ * Return: ERR_PTR() on error or a valid pointer to a struct tegra_mc.
+ */
+struct tegra_mc *devm_tegra_get_memory_controller(struct device *dev)
+{
+ struct platform_device *pdev;
+ struct device_node *np;
+ struct tegra_mc *mc;
+ int err;
+
+ np = of_parse_phandle(dev->of_node, "nvidia,memory-controller", 0);
+ if (!np)
+ return ERR_PTR(-ENOENT);
+
+ pdev = of_find_device_by_node(np);
+ of_node_put(np);
+ if (!pdev)
+ return ERR_PTR(-ENODEV);
+
+ mc = platform_get_drvdata(pdev);
+ if (!mc) {
+ put_device(&pdev->dev);
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ err = devm_add_action(dev, tegra_mc_devm_action_put_device, mc);
+ if (err) {
+ put_device(mc->dev);
+ return ERR_PTR(err);
+ }
+
+ return mc;
+}
+EXPORT_SYMBOL_GPL(devm_tegra_get_memory_controller);
+
static int tegra_mc_block_dma_common(struct tegra_mc *mc,
const struct tegra_mc_reset *rst)
{
diff --git a/drivers/memory/tegra/tegra124-emc.c b/drivers/memory/tegra/tegra124-emc.c
index 76ace42a688a..b92259d4fbd1 100644
--- a/drivers/memory/tegra/tegra124-emc.c
+++ b/drivers/memory/tegra/tegra124-emc.c
@@ -1177,7 +1177,6 @@ static void emc_debugfs_init(struct device *dev, struct tegra_emc *emc)
static int tegra_emc_probe(struct platform_device *pdev)
{
- struct platform_device *mc;
struct device_node *np;
struct tegra_emc *emc;
struct resource *res;
@@ -1195,20 +1194,9 @@ static int tegra_emc_probe(struct platform_device *pdev)
if (IS_ERR(emc->regs))
return PTR_ERR(emc->regs);
- np = of_parse_phandle(pdev->dev.of_node, "nvidia,memory-controller", 0);
- if (!np) {
- dev_err(&pdev->dev, "could not get memory controller\n");
- return -ENOENT;
- }
-
- mc = of_find_device_by_node(np);
- of_node_put(np);
- if (!mc)
- return -ENOENT;
-
- emc->mc = platform_get_drvdata(mc);
- if (!emc->mc)
- return -EPROBE_DEFER;
+ emc->mc = devm_tegra_get_memory_controller(&pdev->dev);
+ if (IS_ERR(emc->mc))
+ return PTR_ERR(emc->mc);
ram_code = tegra_read_ram_code();
diff --git a/drivers/memory/tegra/tegra210-emc-core.c b/drivers/memory/tegra/tegra210-emc-core.c
index cdd663ba4733..8c6ea634e05a 100644
--- a/drivers/memory/tegra/tegra210-emc-core.c
+++ b/drivers/memory/tegra/tegra210-emc-core.c
@@ -1828,7 +1828,6 @@ static int tegra210_emc_probe(struct platform_device *pdev)
{
struct thermal_cooling_device *cd;
unsigned long current_rate;
- struct platform_device *mc;
struct tegra210_emc *emc;
struct device_node *np;
unsigned int i;
@@ -1846,35 +1845,19 @@ static int tegra210_emc_probe(struct platform_device *pdev)
spin_lock_init(&emc->lock);
emc->dev = &pdev->dev;
- np = of_parse_phandle(pdev->dev.of_node, "nvidia,memory-controller", 0);
- if (!np) {
- dev_err(&pdev->dev, "could not get memory controller\n");
- return -ENOENT;
- }
-
- mc = of_find_device_by_node(np);
- of_node_put(np);
- if (!mc)
- return -ENOENT;
-
- emc->mc = platform_get_drvdata(mc);
- if (!emc->mc) {
- put_device(&mc->dev);
- return -EPROBE_DEFER;
- }
+ emc->mc = devm_tegra_get_memory_controller(&pdev->dev);
+ if (IS_ERR(emc->mc))
+ return PTR_ERR(emc->mc);
emc->regs = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(emc->regs)) {
- err = PTR_ERR(emc->regs);
- goto put_mc;
- }
+ if (IS_ERR(emc->regs))
+ return PTR_ERR(emc->regs);
for (i = 0; i < 2; i++) {
emc->channel[i] = devm_platform_ioremap_resource(pdev, 1 + i);
- if (IS_ERR(emc->channel[i])) {
- err = PTR_ERR(emc->channel[i]);
- goto put_mc;
- }
+ if (IS_ERR(emc->channel[i]))
+ return PTR_ERR(emc->channel[i]);
+
}
tegra210_emc_detect(emc);
@@ -1884,7 +1867,7 @@ static int tegra210_emc_probe(struct platform_device *pdev)
err = of_reserved_mem_device_init_by_name(emc->dev, np, "nominal");
if (err < 0) {
dev_err(emc->dev, "failed to get nominal EMC table: %d\n", err);
- goto put_mc;
+ return err;
}
err = of_reserved_mem_device_init_by_name(emc->dev, np, "derated");
@@ -2015,8 +1998,7 @@ static int tegra210_emc_probe(struct platform_device *pdev)
tegra210_clk_emc_detach(emc->clk);
release:
of_reserved_mem_device_release(emc->dev);
-put_mc:
- put_device(emc->mc->dev);
+
return err;
}
@@ -2027,7 +2009,6 @@ static int tegra210_emc_remove(struct platform_device *pdev)
debugfs_remove_recursive(emc->debugfs.root);
tegra210_clk_emc_detach(emc->clk);
of_reserved_mem_device_release(emc->dev);
- put_device(emc->mc->dev);
return 0;
}
diff --git a/drivers/memory/tegra/tegra30-emc.c b/drivers/memory/tegra/tegra30-emc.c
index 055af0e08a2e..602dc4e08c61 100644
--- a/drivers/memory/tegra/tegra30-emc.c
+++ b/drivers/memory/tegra/tegra30-emc.c
@@ -1258,7 +1258,6 @@ static void tegra_emc_debugfs_init(struct tegra_emc *emc)
static int tegra_emc_probe(struct platform_device *pdev)
{
- struct platform_device *mc;
struct device_node *np;
struct tegra_emc *emc;
int err;
@@ -1269,17 +1268,6 @@ static int tegra_emc_probe(struct platform_device *pdev)
return -ENODEV;
}
- np = of_parse_phandle(pdev->dev.of_node, "nvidia,memory-controller", 0);
- if (!np) {
- dev_err(&pdev->dev, "could not get memory controller node\n");
- return -ENOENT;
- }
-
- mc = of_find_device_by_node(np);
- of_node_put(np);
- if (!mc)
- return -ENOENT;
-
np = emc_find_node_by_ram_code(&pdev->dev);
if (!np)
return -EINVAL;
@@ -1290,9 +1278,9 @@ static int tegra_emc_probe(struct platform_device *pdev)
return -ENOMEM;
}
- emc->mc = platform_get_drvdata(mc);
- if (!emc->mc)
- return -EPROBE_DEFER;
+ emc->mc = devm_tegra_get_memory_controller(&pdev->dev);
+ if (IS_ERR(emc->mc))
+ return PTR_ERR(emc->mc);
emc->clk_nb.notifier_call = emc_clk_change_notify;
emc->dev = &pdev->dev;
diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h
index 1238e35653d1..1b7dfed6afb8 100644
--- a/include/soc/tegra/mc.h
+++ b/include/soc/tegra/mc.h
@@ -184,4 +184,14 @@ struct tegra_mc {
int tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate);
unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc);
+#ifdef CONFIG_TEGRA_MC
+struct tegra_mc *devm_tegra_get_memory_controller(struct device *dev);
+#else
+static inline struct tegra_mc *
+devm_tegra_get_memory_controller(struct device *dev)
+{
+ ERR_PTR(-ENODEV);
+}
+#endif
+
#endif /* __SOC_TEGRA_MC_H__ */
--
2.27.0
next prev parent reply other threads:[~2020-10-25 22:21 UTC|newest]
Thread overview: 143+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-25 22:16 [PATCH v6 00/52] Introduce memory interconnect for NVIDIA Tegra SoCs Dmitry Osipenko
2020-10-25 22:16 ` [PATCH v6 01/52] clk: tegra: Export Tegra20 EMC kernel symbols Dmitry Osipenko
2020-10-27 13:04 ` Thierry Reding
2020-10-25 22:16 ` [PATCH v6 02/52] soc/tegra: fuse: Export tegra_read_ram_code() Dmitry Osipenko
2020-10-27 13:17 ` Thierry Reding
2020-10-25 22:16 ` [PATCH v6 03/52] dt-bindings: memory: tegra20: emc: Correct registers range in example Dmitry Osipenko
2020-10-27 13:18 ` Thierry Reding
2020-10-28 15:16 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 04/52] dt-bindings: memory: tegra20: emc: Document nvidia,memory-controller property Dmitry Osipenko
2020-10-27 8:54 ` Krzysztof Kozlowski
2020-10-27 19:17 ` Dmitry Osipenko
2020-10-27 19:30 ` Krzysztof Kozlowski
2020-10-27 20:37 ` Dmitry Osipenko
2020-10-28 15:23 ` Rob Herring
2020-10-28 15:35 ` Krzysztof Kozlowski
2020-10-28 15:23 ` [PATCH v6 04/52] dt-bindings: memory: tegra20: emc: Document nvidia, memory-controller property Rob Herring
2020-10-25 22:16 ` [PATCH v6 05/52] dt-bindings: memory: tegra20: mc: Document new interconnect property Dmitry Osipenko
2020-10-27 8:55 ` Krzysztof Kozlowski
2020-10-27 19:17 ` Dmitry Osipenko
2020-10-27 19:34 ` Krzysztof Kozlowski
2020-10-25 22:16 ` [PATCH v6 06/52] dt-bindings: memory: tegra20: emc: " Dmitry Osipenko
2020-10-27 9:03 ` Krzysztof Kozlowski
2020-10-25 22:16 ` [PATCH v6 07/52] dt-bindings: memory: tegra20: emc: Document OPP table and voltage regulator Dmitry Osipenko
2020-10-27 8:57 ` Krzysztof Kozlowski
2020-10-25 22:16 ` [PATCH v6 08/52] dt-bindings: memory: tegra20: emc: Document mfd-simple compatible and statistics sub-device Dmitry Osipenko
2020-10-27 9:02 ` Krzysztof Kozlowski
2020-10-27 19:22 ` Dmitry Osipenko
2020-10-27 19:44 ` Krzysztof Kozlowski
2020-10-27 20:18 ` Dmitry Osipenko
2020-10-28 15:26 ` Rob Herring
2020-10-31 19:53 ` Dmitry Osipenko
2020-10-27 13:22 ` Thierry Reding
2020-10-27 19:23 ` Dmitry Osipenko
2020-10-28 15:28 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 09/52] dt-bindings: memory: tegra30: mc: Document new interconnect property Dmitry Osipenko
2020-10-27 9:05 ` Krzysztof Kozlowski
2020-10-27 19:18 ` Dmitry Osipenko
2020-10-27 19:39 ` Krzysztof Kozlowski
2020-10-25 22:16 ` [PATCH v6 10/52] dt-bindings: memory: tegra30: emc: " Dmitry Osipenko
2020-10-25 22:16 ` [PATCH v6 11/52] dt-bindings: memory: tegra30: emc: Document OPP table and voltage regulator Dmitry Osipenko
2020-10-28 15:29 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 12/52] dt-bindings: memory: tegra124: mc: Document new interconnect property Dmitry Osipenko
2020-10-26 12:49 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 13/52] dt-bindings: memory: tegra124: emc: " Dmitry Osipenko
2020-10-26 12:51 ` Rob Herring
2020-10-27 10:25 ` Krzysztof Kozlowski
2020-10-27 19:19 ` Dmitry Osipenko
2020-10-27 19:48 ` Krzysztof Kozlowski
2020-10-27 20:16 ` Dmitry Osipenko
2020-10-28 19:27 ` Krzysztof Kozlowski
2020-10-25 22:16 ` [PATCH v6 14/52] dt-bindings: memory: tegra124: emc: Document OPP table and voltage regulator Dmitry Osipenko
2020-10-28 15:30 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 15/52] dt-bindings: tegra30-actmon: Document OPP and interconnect properties Dmitry Osipenko
2020-10-28 15:30 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 16/52] dt-bindings: host1x: Document new " Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 17/52] dt-bindings: memory: tegra20: Add memory client IDs Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 18/52] dt-bindings: memory: tegra30: " Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 19/52] dt-bindings: memory: tegra124: " Dmitry Osipenko
2020-10-28 15:31 ` Rob Herring
2020-10-25 22:17 ` [PATCH v6 20/52] ARM: tegra: Correct EMC registers size in Tegra20 device-tree Dmitry Osipenko
2020-10-27 9:10 ` Krzysztof Kozlowski
2020-10-27 20:43 ` Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 21/52] ARM: tegra: Add interconnect properties to " Dmitry Osipenko
2020-10-27 9:12 ` Krzysztof Kozlowski
2020-10-27 13:30 ` Thierry Reding
2020-10-25 22:17 ` [PATCH v6 22/52] ARM: tegra: Add interconnect properties to Tegra30 device-tree Dmitry Osipenko
2020-10-27 9:15 ` Krzysztof Kozlowski
2020-10-27 19:23 ` Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 23/52] ARM: tegra: Add interconnect properties to Tegra124 device-tree Dmitry Osipenko
2020-10-27 9:16 ` Krzysztof Kozlowski
2020-10-25 22:17 ` [PATCH v6 24/52] ARM: tegra: Add nvidia,memory-controller phandle to Tegra20 EMC device-tree Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 25/52] ARM: tegra: Add DVFS properties to Tegra20 EMC device-tree node Dmitry Osipenko
2020-10-27 9:18 ` Krzysztof Kozlowski
2020-10-25 22:17 ` [PATCH v6 26/52] ARM: tegra: Add DVFS properties to Tegra30 EMC and ACTMON device-tree nodes Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 27/52] ARM: tegra: Add DVFS properties to Tegra124 " Dmitry Osipenko
2020-10-25 22:17 ` Dmitry Osipenko [this message]
2020-10-27 9:42 ` [PATCH v6 28/52] memory: tegra: Add and use devm_tegra_get_memory_controller() Krzysztof Kozlowski
2020-10-27 19:24 ` Dmitry Osipenko
2020-10-27 13:35 ` Thierry Reding
2020-10-25 22:17 ` [PATCH v6 29/52] memory: tegra-mc: Add interconnect framework Dmitry Osipenko
2020-10-27 13:48 ` Thierry Reding
2020-10-27 19:30 ` Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 30/52] memory: tegra20-emc: Make driver modular Dmitry Osipenko
2020-10-27 13:49 ` Thierry Reding
2020-10-25 22:17 ` [PATCH v6 31/52] memory: tegra20-emc: Use devm_platform_ioremap_resource() Dmitry Osipenko
2020-10-27 13:50 ` Thierry Reding
2020-10-27 13:57 ` Krzysztof Kozlowski
2020-10-25 22:17 ` [PATCH v6 32/52] memory: tegra20-emc: Continue probing if timings are missing in device-tree Dmitry Osipenko
2020-10-27 13:52 ` Thierry Reding
2020-10-27 19:38 ` Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 33/52] memory: tegra20: Support interconnect framework Dmitry Osipenko
2020-10-27 10:09 ` Krzysztof Kozlowski
2020-10-27 20:25 ` Dmitry Osipenko
2020-10-27 14:11 ` Thierry Reding
2020-10-27 20:22 ` Dmitry Osipenko
2020-10-27 21:12 ` Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 34/52] memory: tegra20-emc: Don't parse emc-stats node Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 35/52] memory: tegra: Add missing latency allowness entry for Page Table Cache Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 36/52] memory: tegra: Add FIFO sizes to Tegra30 memory clients Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 37/52] memory: tegra30-emc: Make driver modular Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 38/52] memory: tegra30-emc: Continue probing if timings are missing in device-tree Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 39/52] memory: tegra30: Support interconnect framework Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 40/52] memory: tegra124-emc: Make driver modular Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 41/52] memory: tegra124-emc: Use devm_platform_ioremap_resource() Dmitry Osipenko
2020-10-27 10:27 ` Krzysztof Kozlowski
2020-10-27 20:30 ` Dmitry Osipenko
2020-10-28 19:28 ` Krzysztof Kozlowski
2020-10-25 22:17 ` [PATCH v6 42/52] memory: tegra124: Support interconnect framework Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 43/52] memory: tegra: Remove superfluous error messages around platform_get_irq() Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 44/52] drm/tegra: dc: Support memory bandwidth management Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 45/52] drm/tegra: dc: Extend debug stats with total number of events Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 46/52] opp: Put interconnect paths outside of opp_table_lock Dmitry Osipenko
2020-10-27 5:10 ` Viresh Kumar
2020-10-27 20:26 ` Dmitry Osipenko
2020-10-28 4:03 ` Viresh Kumar
2020-10-25 22:17 ` [PATCH v6 47/52] PM / devfreq: tegra20: Silence deferred probe error Dmitry Osipenko
2020-10-26 3:16 ` Chanwoo Choi
2020-10-25 22:17 ` [PATCH v6 48/52] PM / devfreq: tegra20: Relax Kconfig dependency Dmitry Osipenko
2020-10-26 3:18 ` Chanwoo Choi
2020-10-25 22:17 ` [PATCH v6 49/52] PM / devfreq: tegra20: Convert to EMC_STAT driver, support interconnect and device-tree Dmitry Osipenko
2020-11-01 13:31 ` Chanwoo Choi
2020-11-01 14:12 ` Dmitry Osipenko
2020-11-02 20:08 ` Dmitry Osipenko
2020-11-03 2:22 ` Chanwoo Choi
2020-10-25 22:17 ` [PATCH v6 50/52] PM / devfreq: tegra30: Silence deferred probe error Dmitry Osipenko
2020-10-26 3:17 ` Chanwoo Choi
2020-10-25 22:17 ` [PATCH v6 51/52] PM / devfreq: tegra30: Support interconnect and OPPs from device-tree Dmitry Osipenko
2020-11-01 14:39 ` Chanwoo Choi
2020-11-01 15:23 ` Dmitry Osipenko
2020-11-01 15:44 ` Chanwoo Choi
2020-11-01 15:49 ` Dmitry Osipenko
2020-11-01 15:57 ` Chanwoo Choi
2020-11-02 19:58 ` Dmitry Osipenko
2020-11-02 20:00 ` Dmitry Osipenko
2020-11-01 14:44 ` Chanwoo Choi
2020-11-01 15:24 ` Dmitry Osipenko
2020-11-01 15:45 ` Chanwoo Choi
2020-10-25 22:17 ` [PATCH v6 52/52] PM / devfreq: tegra30: Separate configurations per-SoC generation Dmitry Osipenko
2020-11-01 15:20 ` Chanwoo Choi
2020-10-26 15:08 ` [PATCH v6 00/52] Introduce memory interconnect for NVIDIA Tegra SoCs Krzysztof Kozlowski
2020-10-26 19:14 ` Dmitry Osipenko
2020-10-27 8:52 ` Krzysztof Kozlowski
2020-10-27 20:31 ` Dmitry Osipenko
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