[PATCH v1 0/2] Make Tegra memory drivers to use devm_tegra_core_dev_init_opp_table()

[PATCH v1 0/2] Make Tegra memory drivers to use devm_tegra_core_dev_init_opp_table()

[Dmitry Osipenko]

Tegra20/30 memory drivers could take advantage of the new helper which
initializes OPP table right now [1]. Other memory drivers can't be
switched to the new helper until core voltage scaling will be supported
by the corresponding Tegra SoC generations, for now only Tegra20/30 SoCs
support core voltage scaling in the upstream kernel.

Please note that [1] hasn't been reviewed and merged yet.

[1] https://lore.kernel.org/lkml/20210516205138.22501-1-digetx@gmail.com/T/#m247b51a938244c500d70c38cdb9d44adb5f389a7

Dmitry Osipenko (2):
  memory: tegra20-emc: Use devm_tegra_core_dev_init_opp_table()
  memory: tegra30-emc: Use devm_tegra_core_dev_init_opp_table()

 drivers/memory/tegra/tegra20-emc.c | 48 +++---------------------------
 drivers/memory/tegra/tegra30-emc.c | 48 +++---------------------------
 2 files changed, 8 insertions(+), 88 deletions(-)

-- 
2.30.2

[PATCH v1 1/2] memory: tegra20-emc: Use devm_tegra_core_dev_init_opp_table()

[Dmitry Osipenko]

Use common devm_tegra_core_dev_init_opp_table() helper for the OPP table
initialization.

Tested-by: Paul Fertser <fercerpav@gmail.com> # PAZ00 T20
Tested-by: Nicolas Chauvet <kwizart@gmail.com> # PAZ00 T20
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/memory/tegra/tegra20-emc.c | 48 +++---------------------------
 1 file changed, 4 insertions(+), 44 deletions(-)

diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c
index da8a0da8da79..a534197a5fb2 100644
--- a/drivers/memory/tegra/tegra20-emc.c
+++ b/drivers/memory/tegra/tegra20-emc.c
@@ -908,49 +908,6 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc)
 	return err;
 }
 
-static int tegra_emc_opp_table_init(struct tegra_emc *emc)
-{
-	u32 hw_version = BIT(tegra_sku_info.soc_process_id);
-	struct opp_table *hw_opp_table;
-	int err;
-
-	hw_opp_table = dev_pm_opp_set_supported_hw(emc->dev, &hw_version, 1);
-	err = PTR_ERR_OR_ZERO(hw_opp_table);
-	if (err) {
-		dev_err(emc->dev, "failed to set OPP supported HW: %d\n", err);
-		return err;
-	}
-
-	err = dev_pm_opp_of_add_table(emc->dev);
-	if (err) {
-		if (err == -ENODEV)
-			dev_err(emc->dev, "OPP table not found, please update your device tree\n");
-		else
-			dev_err(emc->dev, "failed to add OPP table: %d\n", err);
-
-		goto put_hw_table;
-	}
-
-	dev_info_once(emc->dev, "OPP HW ver. 0x%x, current clock rate %lu MHz\n",
-		      hw_version, clk_get_rate(emc->clk) / 1000000);
-
-	/* first dummy rate-set initializes voltage state */
-	err = dev_pm_opp_set_rate(emc->dev, clk_get_rate(emc->clk));
-	if (err) {
-		dev_err(emc->dev, "failed to initialize OPP clock: %d\n", err);
-		goto remove_table;
-	}
-
-	return 0;
-
-remove_table:
-	dev_pm_opp_of_remove_table(emc->dev);
-put_hw_table:
-	dev_pm_opp_put_supported_hw(hw_opp_table);
-
-	return err;
-}
-
 static void devm_tegra_emc_unset_callback(void *data)
 {
 	tegra20_clk_set_emc_round_callback(NULL, NULL);
@@ -1077,6 +1034,7 @@ static int tegra_emc_devfreq_init(struct tegra_emc *emc)
 
 static int tegra_emc_probe(struct platform_device *pdev)
 {
+	struct tegra_core_opp_params opp_params = {};
 	struct device_node *np;
 	struct tegra_emc *emc;
 	int irq, err;
@@ -1122,7 +1080,9 @@ static int tegra_emc_probe(struct platform_device *pdev)
 	if (err)
 		return err;
 
-	err = tegra_emc_opp_table_init(emc);
+	opp_params.init_state = true;
+
+	err = devm_tegra_core_dev_init_opp_table(&pdev->dev, &opp_params);
 	if (err)
 		return err;
 
-- 
2.30.2

[PATCH v1 2/2] memory: tegra30-emc: Use devm_tegra_core_dev_init_opp_table()

[Dmitry Osipenko]

Use common devm_tegra_core_dev_init_opp_table() helper for the OPP table
initialization.

Tested-by: Peter Geis <pgwipeout@gmail.com> # Ouya T30
Tested-by: Matt Merhar <mattmerhar@protonmail.com> # Ouya T30
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/memory/tegra/tegra30-emc.c | 48 +++---------------------------
 1 file changed, 4 insertions(+), 44 deletions(-)

diff --git a/drivers/memory/tegra/tegra30-emc.c b/drivers/memory/tegra/tegra30-emc.c
index 829f6d673c96..239074c5ff75 100644
--- a/drivers/memory/tegra/tegra30-emc.c
+++ b/drivers/memory/tegra/tegra30-emc.c
@@ -1480,49 +1480,6 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc)
 	return err;
 }
 
-static int tegra_emc_opp_table_init(struct tegra_emc *emc)
-{
-	u32 hw_version = BIT(tegra_sku_info.soc_speedo_id);
-	struct opp_table *hw_opp_table;
-	int err;
-
-	hw_opp_table = dev_pm_opp_set_supported_hw(emc->dev, &hw_version, 1);
-	err = PTR_ERR_OR_ZERO(hw_opp_table);
-	if (err) {
-		dev_err(emc->dev, "failed to set OPP supported HW: %d\n", err);
-		return err;
-	}
-
-	err = dev_pm_opp_of_add_table(emc->dev);
-	if (err) {
-		if (err == -ENODEV)
-			dev_err(emc->dev, "OPP table not found, please update your device tree\n");
-		else
-			dev_err(emc->dev, "failed to add OPP table: %d\n", err);
-
-		goto put_hw_table;
-	}
-
-	dev_info_once(emc->dev, "OPP HW ver. 0x%x, current clock rate %lu MHz\n",
-		      hw_version, clk_get_rate(emc->clk) / 1000000);
-
-	/* first dummy rate-set initializes voltage state */
-	err = dev_pm_opp_set_rate(emc->dev, clk_get_rate(emc->clk));
-	if (err) {
-		dev_err(emc->dev, "failed to initialize OPP clock: %d\n", err);
-		goto remove_table;
-	}
-
-	return 0;
-
-remove_table:
-	dev_pm_opp_of_remove_table(emc->dev);
-put_hw_table:
-	dev_pm_opp_put_supported_hw(hw_opp_table);
-
-	return err;
-}
-
 static void devm_tegra_emc_unset_callback(void *data)
 {
 	tegra20_clk_set_emc_round_callback(NULL, NULL);
@@ -1568,6 +1525,7 @@ static int tegra_emc_init_clk(struct tegra_emc *emc)
 
 static int tegra_emc_probe(struct platform_device *pdev)
 {
+	struct tegra_core_opp_params opp_params = {};
 	struct device_node *np;
 	struct tegra_emc *emc;
 	int err;
@@ -1617,7 +1575,9 @@ static int tegra_emc_probe(struct platform_device *pdev)
 	if (err)
 		return err;
 
-	err = tegra_emc_opp_table_init(emc);
+	opp_params.init_state = true;
+
+	err = devm_tegra_core_dev_init_opp_table(&pdev->dev, &opp_params);
 	if (err)
 		return err;
 
-- 
2.30.2