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>
Cc: devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
"Artur Świgoń" <a.swigon@samsung.com>,
linux-tegra@vger.kernel.org
Subject: [PATCH v4 33/37] memory: tegra30-emc: Continue probing if timings are missing in device-tree
Date: Tue, 9 Jun 2020 16:14:00 +0300 [thread overview]
Message-ID: <20200609131404.17523-34-digetx@gmail.com> (raw)
In-Reply-To: <20200609131404.17523-1-digetx@gmail.com>
EMC driver will become mandatory after turning it into interconnect
provider because interconnect users, like display controller driver, will
fail to probe using newer device-trees that have interconnect properties.
Thus make EMC driver to probe even if timings are missing in device-tree.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/memory/tegra/tegra30-emc.c | 29 +++++++++++++++--------------
1 file changed, 15 insertions(+), 14 deletions(-)
diff --git a/drivers/memory/tegra/tegra30-emc.c b/drivers/memory/tegra/tegra30-emc.c
index 85d4effb8e6f..f6c688bfe41f 100644
--- a/drivers/memory/tegra/tegra30-emc.c
+++ b/drivers/memory/tegra/tegra30-emc.c
@@ -988,6 +988,11 @@ static struct device_node *emc_find_node_by_ram_code(struct device *dev)
u32 value, ram_code;
int err;
+ if (of_get_child_count(dev->of_node) == 0) {
+ dev_info(dev, "device-tree doesn't have memory timings\n");
+ return NULL;
+ }
+
ram_code = tegra_read_ram_code();
for_each_child_of_node(dev->of_node, np) {
@@ -1057,6 +1062,9 @@ static long emc_round_rate(unsigned long rate,
struct tegra_emc *emc = arg;
unsigned int i;
+ if (!emc->num_timings)
+ return clk_get_rate(emc->clk);
+
min_rate = min(min_rate, emc->timings[emc->num_timings - 1].rate);
for (i = 0; i < emc->num_timings; i++) {
@@ -1263,12 +1271,6 @@ static int tegra_emc_probe(struct platform_device *pdev)
struct tegra_emc *emc;
int err;
- if (of_get_child_count(pdev->dev.of_node) == 0) {
- dev_info(&pdev->dev,
- "device-tree node doesn't have memory timings\n");
- 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");
@@ -1280,10 +1282,6 @@ static int tegra_emc_probe(struct platform_device *pdev)
if (!mc)
return -ENOENT;
- np = emc_find_node_by_ram_code(&pdev->dev);
- if (!np)
- return -EINVAL;
-
emc = devm_kzalloc(&pdev->dev, sizeof(*emc), GFP_KERNEL);
if (!emc) {
of_node_put(np);
@@ -1297,10 +1295,13 @@ static int tegra_emc_probe(struct platform_device *pdev)
emc->clk_nb.notifier_call = emc_clk_change_notify;
emc->dev = &pdev->dev;
- err = emc_load_timings_from_dt(emc, np);
- of_node_put(np);
- if (err)
- return err;
+ np = emc_find_node_by_ram_code(&pdev->dev);
+ if (np) {
+ err = emc_load_timings_from_dt(emc, np);
+ of_node_put(np);
+ if (err)
+ return err;
+ }
emc->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(emc->regs))
--
2.26.0
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next prev parent reply other threads:[~2020-06-10 7:37 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-09 13:13 [PATCH v4 00/37] Introduce memory interconnect for NVIDIA Tegra SoCs Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 01/37] clk: Export clk_hw_reparent() Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 02/37] clk: tegra: Remove Memory Controller lock Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 03/37] clk: tegra: Export Tegra20 EMC kernel symbols Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 04/37] memory: tegra20-emc: Make driver modular Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 05/37] memory: tegra30-emc: " Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 06/37] memory: tegra124-emc: " Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 07/37] memory: tegra124-emc: Use devm_platform_ioremap_resource Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 08/37] soc/tegra: fuse: Export tegra_read_ram_code() Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 09/37] memory: tegra20-emc: Initialize MC timings Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 10/37] PM / devfreq: tegra20: Silence deferred probe error Dmitry Osipenko
2020-07-02 0:56 ` Chanwoo Choi
2020-07-02 1:35 ` Chanwoo Choi
2020-06-09 13:13 ` [PATCH v4 11/37] PM / devfreq: tegra30: " Dmitry Osipenko
2020-07-02 0:59 ` Chanwoo Choi
2020-07-02 1:20 ` Dmitry Osipenko
2020-07-02 1:34 ` Chanwoo Choi
2020-07-02 1:25 ` Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 12/37] PM / devfreq: tegra20: Use MC timings for building OPP table Dmitry Osipenko
2020-07-02 4:18 ` Chanwoo Choi
2020-07-02 5:07 ` Dmitry Osipenko
2020-07-02 5:30 ` Chanwoo Choi
2020-07-02 5:43 ` Dmitry Osipenko
2020-07-02 5:53 ` Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 13/37] PM / devfreq: tegra30: " Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 14/37] PM / devfreq: tegra20: Add error messages to tegra_devfreq_target() Dmitry Osipenko
2020-07-02 1:12 ` Chanwoo Choi
2020-06-09 13:13 ` [PATCH v4 15/37] PM / devfreq: tegra30: " Dmitry Osipenko
2020-07-02 1:12 ` Chanwoo Choi
2020-06-09 13:13 ` [PATCH v4 16/37] PM / devfreq: tegra20: Adjust clocks conversion ratio and polling interval Dmitry Osipenko
2020-07-02 1:37 ` Chanwoo Choi
2020-06-09 13:13 ` [PATCH v4 17/37] PM / devfreq: tegra20: Relax Kconfig dependency Dmitry Osipenko
2020-07-02 2:10 ` Chanwoo Choi
2020-06-09 13:13 ` [PATCH v4 18/37] dt-bindings: memory: tegra20: mc: Document new interconnect property Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 19/37] dt-bindings: memory: tegra20: emc: " Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 20/37] dt-bindings: memory: tegra30: mc: " Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 21/37] dt-bindings: memory: tegra30: emc: " Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 22/37] dt-bindings: host1x: Document new interconnect properties Dmitry Osipenko
2020-06-17 21:37 ` Rob Herring
2020-06-17 21:44 ` Dmitry Osipenko
2020-06-17 21:48 ` Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 23/37] dt-bindings: memory: tegra20: Add memory client IDs Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 24/37] dt-bindings: memory: tegra30: " Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 25/37] ARM: tegra: Add interconnect properties to Tegra20 device-tree Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 26/37] ARM: tegra: Add interconnect properties to Tegra30 device-tree Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 27/37] interconnect: Relax requirement in of_icc_get_from_provider() Dmitry Osipenko
2020-07-01 17:10 ` Georgi Djakov
2020-07-01 23:41 ` Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 28/37] memory: tegra: Register as interconnect provider Dmitry Osipenko
2020-07-01 17:12 ` Georgi Djakov
2020-07-01 23:36 ` Dmitry Osipenko
2020-07-02 12:36 ` Georgi Djakov
2020-07-03 8:41 ` Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 29/37] memory: tegra20-emc: Use devm_platform_ioremap_resource Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 30/37] memory: tegra20-emc: Continue probing if timings are missing in device-tree Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 31/37] memory: tegra20-emc: Register as interconnect provider Dmitry Osipenko
2020-06-09 13:13 ` [PATCH v4 32/37] memory: tegra20-emc: Create tegra20-devfreq device Dmitry Osipenko
2020-06-09 13:14 ` Dmitry Osipenko [this message]
2020-06-09 13:14 ` [PATCH v4 34/37] memory: tegra30-emc: Register as interconnect provider Dmitry Osipenko
2020-06-09 13:14 ` [PATCH v4 35/37] drm/tegra: dc: Support memory bandwidth management Dmitry Osipenko
2020-06-09 13:14 ` [PATCH v4 36/37] drm/tegra: dc: Tune up high priority request controls for Tegra20 Dmitry Osipenko
2020-06-09 13:14 ` [PATCH v4 37/37] drm/tegra: dc: Extend debug stats with total number of events Dmitry Osipenko
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