From: Sumit Gupta <sumitg@nvidia.com>
To: <rjw@rjwysocki.net>, <viresh.kumar@linaro.org>,
<catalin.marinas@arm.com>, <will@kernel.org>,
<thierry.reding@gmail.com>, <jonathanh@nvidia.com>,
<talho@nvidia.com>, <linux-pm@vger.kernel.org>,
<linux-tegra@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Cc: sumitg@nvidia.com, bbasu@nvidia.com, mperttunen@nvidia.com
Subject: [TEGRA194_CPUFREQ Patch 1/3] firmware: tegra: adding function to get BPMP data
Date: Tue, 3 Dec 2019 23:02:26 +0530 [thread overview]
Message-ID: <1575394348-17649-1-git-send-email-sumitg@nvidia.com> (raw)
Adding new function of_tegra_bpmp_get() to get BPMP data.
This function can be used by other drivers like cpufreq to
get BPMP data without adding any property in respective
drivers DT node.
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
---
drivers/firmware/tegra/bpmp.c | 38 ++++++++++++++++++++++++++++++++++++++
include/soc/tegra/bpmp.h | 5 +++++
2 files changed, 43 insertions(+)
diff --git a/drivers/firmware/tegra/bpmp.c b/drivers/firmware/tegra/bpmp.c
index 6741fcd..9c3d7f1 100644
--- a/drivers/firmware/tegra/bpmp.c
+++ b/drivers/firmware/tegra/bpmp.c
@@ -38,6 +38,44 @@ channel_to_ops(struct tegra_bpmp_channel *channel)
return bpmp->soc->ops;
}
+struct tegra_bpmp *of_tegra_bpmp_get(void)
+{
+ struct platform_device *pdev;
+ struct device_node *bpmp_dev;
+ struct tegra_bpmp *bpmp;
+
+ /* Check for bpmp device status in DT */
+ bpmp_dev = of_find_compatible_node(NULL, NULL, "nvidia,tegra186-bpmp");
+ if (!bpmp_dev) {
+ bpmp = ERR_PTR(-ENODEV);
+ goto err_out;
+ }
+ if (!of_device_is_available(bpmp_dev)) {
+ bpmp = ERR_PTR(-ENODEV);
+ goto err_put;
+ }
+
+ pdev = of_find_device_by_node(bpmp_dev);
+ if (!pdev) {
+ bpmp = ERR_PTR(-ENODEV);
+ goto err_put;
+ }
+
+ bpmp = platform_get_drvdata(pdev);
+ if (!bpmp) {
+ bpmp = ERR_PTR(-EPROBE_DEFER);
+ put_device(&pdev->dev);
+ goto err_put;
+ }
+
+ return bpmp;
+err_put:
+ of_node_put(bpmp_dev);
+err_out:
+ return bpmp;
+}
+EXPORT_SYMBOL_GPL(of_tegra_bpmp_get);
+
struct tegra_bpmp *tegra_bpmp_get(struct device *dev)
{
struct platform_device *pdev;
diff --git a/include/soc/tegra/bpmp.h b/include/soc/tegra/bpmp.h
index f2604e9..21402d9 100644
--- a/include/soc/tegra/bpmp.h
+++ b/include/soc/tegra/bpmp.h
@@ -107,6 +107,7 @@ struct tegra_bpmp_message {
};
#if IS_ENABLED(CONFIG_TEGRA_BPMP)
+struct tegra_bpmp *of_tegra_bpmp_get(void);
struct tegra_bpmp *tegra_bpmp_get(struct device *dev);
void tegra_bpmp_put(struct tegra_bpmp *bpmp);
int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
@@ -122,6 +123,10 @@ void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
void *data);
bool tegra_bpmp_mrq_is_supported(struct tegra_bpmp *bpmp, unsigned int mrq);
#else
+static inline struct tegra_bpmp *of_tegra_bpmp_get(void)
+{
+ return ERR_PTR(-ENOTSUPP);
+}
static inline struct tegra_bpmp *tegra_bpmp_get(struct device *dev)
{
return ERR_PTR(-ENOTSUPP);
--
2.7.4
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next reply other threads:[~2019-12-03 17:32 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-03 17:32 Sumit Gupta [this message]
2019-12-03 17:32 ` [TEGRA194_CPUFREQ Patch 2/3] cpufreq: Add Tegra194 cpufreq driver Sumit Gupta
2019-12-04 5:40 ` Viresh Kumar
2019-12-04 10:55 ` sumitg
2019-12-04 11:27 ` Viresh Kumar
2019-12-04 13:57 ` Dmitry Osipenko
2019-12-05 2:51 ` Viresh Kumar
2019-12-05 12:55 ` Dmitry Osipenko
2020-03-25 23:59 ` sumitg
2019-12-04 13:59 ` Dmitry Osipenko
2019-12-05 14:15 ` Dmitry Osipenko
2020-03-26 11:50 ` Viresh Kumar
2020-04-04 18:38 ` sumitg
2020-04-06 2:55 ` Viresh Kumar
2020-04-07 18:18 ` sumitg
2020-04-08 5:53 ` Viresh Kumar
2020-04-08 11:24 ` sumitg
2020-04-09 7:44 ` Viresh Kumar
2020-04-09 11:21 ` Sumit Gupta
2020-04-13 6:21 ` Viresh Kumar
2020-04-13 12:20 ` Sumit Gupta
2020-04-14 5:45 ` Viresh Kumar
2020-04-15 11:25 ` Sumit Gupta
2020-04-16 3:37 ` Viresh Kumar
2020-04-16 7:06 ` Sumit Gupta
2019-12-03 17:32 ` [TEGRA194_CPUFREQ Patch 3/3] arm64: defconfig: Enable CONFIG_ARM_TEGRA194_CPUFREQ Sumit Gupta
2019-12-03 17:42 ` [TEGRA194_CPUFREQ Patch 1/3] firmware: tegra: adding function to get BPMP data Thierry Reding
2019-12-04 8:45 ` Mikko Perttunen
2019-12-04 9:17 ` Viresh Kumar
2019-12-04 9:33 ` Thierry Reding
2019-12-04 9:51 ` Viresh Kumar
2020-04-07 10:05 ` Thierry Reding
2020-04-27 7:18 ` Thierry Reding
2020-04-29 8:21 ` Sumit Gupta
2020-05-06 16:58 ` Thierry Reding
2020-05-20 14:43 ` Rob Herring
2020-05-20 15:38 ` Thierry Reding
2020-05-20 16:21 ` Rob Herring
2019-12-04 10:21 ` Mikko Perttunen
2019-12-04 10:26 ` Viresh Kumar
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