| Message ID | 20221023164000.555654-1-marex@denx.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [RFC] soc: imx: gpcv2: Split clock prepare from clock enable in the domain | expand |
Hi Marek, Thank you for the patch. On Sun, Oct 23, 2022 at 06:40:00PM +0200, Marek Vasut wrote: > It is possible for clk_disable_unused() to trigger lockdep warning > regarding lock ordering in this driver. This happens in case of the > following conditions: > > A) clock core clk_disable_unused() triggers the following sequence in a > driver which also uses GPCv2 domain: > - clk_prepare_lock() -> obtains clock core prepare_lock > - pm_runtime_get*() -> obtains &blk_ctrl_genpd_lock_class > > B) driver powers up a power domain and triggers the following sequence > in GPCv2: > - pm_runtime_get_sync() -> obtains &blk_ctrl_genpd_lock_class > - clk_bulk_prepare_enable() -> obtains clock core prepare_lock > > This can lead to a deadlock in case A and B runs on separate CPUs. > > To avoid the deadlock, split clk_*prepare() from clk_*enable() and > call the former before pm_runtime_get_sync(). This way, the GPCv2 > driver always claims the prepare_lock before blk_ctrl_genpd_lock_class > and the deadlock is avoided. > > The imx8m and imx8mp block controller drivers likely need similar fix. Indeed, I'm getting a warning from lockdep: [ 3019.012615] ====================================================== [ 3019.018796] WARNING: possible circular locking dependency detected [ 3019.024978] 6.1.0-rc1-00233-gd15fae6050bd #298 Not tainted [ 3019.030466] ------------------------------------------------------ [ 3019.036644] cam/377 is trying to acquire lock: [ 3019.041092] ffff800009c1e5e8 (prepare_lock){+.+.}-{3:3}, at: clk_prepare_lock+0x54/0xb0 [ 3019.049131] [ 3019.049131] but task is already holding lock: [ 3019.054962] ffff000000f50f90 (&blk_ctrl_genpd_lock_class){+.+.}-{3:3}, at: genpd_lock_mtx+0x20/0x30 [ 3019.064036] [ 3019.064036] which lock already depends on the new lock. [ 3019.064036] [ 3019.072212] [ 3019.072212] the existing dependency chain (in reverse order) is: [ 3019.079697] [ 3019.079697] -> #1 (&blk_ctrl_genpd_lock_class){+.+.}-{3:3}: [ 3019.086759] lock_acquire+0x68/0x90 [ 3019.090774] __mutex_lock+0x8c/0x420 [ 3019.094878] mutex_lock_nested+0x34/0x40 [ 3019.099330] genpd_lock_mtx+0x20/0x30 [ 3019.103520] genpd_runtime_resume+0xfc/0x2e0 [ 3019.108316] __rpm_callback+0x50/0x1b0 [ 3019.112593] rpm_callback+0x74/0x80 [ 3019.116611] rpm_resume+0x434/0x6e0 [ 3019.120627] __pm_runtime_resume+0x54/0xa0 [ 3019.125250] clk_pm_runtime_get.part.0.isra.0+0x24/0xa0 [ 3019.131001] clk_core_set_rate_nolock+0xbc/0x2b0 [ 3019.136149] clk_set_rate+0x40/0xa0 [ 3019.140165] lcdif_crtc_atomic_enable+0x98/0x880 [imx_lcdif] [ 3019.146364] drm_atomic_helper_commit_modeset_enables+0xac/0x2b0 [ 3019.152901] drm_atomic_helper_commit_tail_rpm+0x58/0xb0 [ 3019.158743] commit_tail+0xac/0x1a0 [ 3019.162757] drm_atomic_helper_commit+0x1a0/0x1c0 [ 3019.167986] drm_atomic_commit+0x94/0x130 [ 3019.172521] drm_client_modeset_commit_atomic+0x230/0x2a0 [ 3019.178449] drm_client_modeset_commit_locked+0x68/0x1d0 [ 3019.184290] drm_client_modeset_commit+0x38/0x60 [ 3019.189436] drm_fb_helper_set_par+0xd4/0x130 [ 3019.194319] fbcon_init+0x3d4/0x540 [ 3019.198334] visual_init+0xb8/0x110 [ 3019.202349] do_bind_con_driver.isra.0+0x1c8/0x3a0 [ 3019.207670] do_take_over_console+0x148/0x200 [ 3019.212557] do_fbcon_takeover+0x74/0xf0 [ 3019.217007] fbcon_fb_registered+0x18c/0x200 [ 3019.221803] register_framebuffer+0x1bc/0x2b0 [ 3019.226690] __drm_fb_helper_initial_config_and_unlock+0x338/0x5c0 [ 3019.233397] drm_fbdev_client_hotplug+0xd8/0x1c0 [ 3019.238541] drm_fbdev_generic_setup+0xbc/0x1b0 [ 3019.243599] lcdif_probe+0x2b0/0x310 [imx_lcdif] [ 3019.248751] platform_probe+0x70/0xf0 [ 3019.252940] really_probe+0xc8/0x3e0 [ 3019.257046] __driver_probe_device+0x84/0x190 [ 3019.261933] driver_probe_device+0x44/0x120 [ 3019.266646] __device_attach_driver+0xc4/0x160 [ 3019.271618] bus_for_each_drv+0x80/0xe0 [ 3019.275985] __device_attach+0xb0/0x1f0 [ 3019.280348] device_initial_probe+0x1c/0x30 [ 3019.285060] bus_probe_device+0xa4/0xb0 [ 3019.289426] deferred_probe_work_func+0xac/0x100 [ 3019.294575] process_one_work+0x294/0x6b0 [ 3019.299109] worker_thread+0x7c/0x450 [ 3019.303296] kthread+0x114/0x120 [ 3019.307052] ret_from_fork+0x10/0x20 [ 3019.311157] [ 3019.311157] -> #0 (prepare_lock){+.+.}-{3:3}: [ 3019.317005] __lock_acquire+0x1148/0x1910 [ 3019.321544] lock_acquire.part.0+0xec/0x260 [ 3019.326255] lock_acquire+0x68/0x90 [ 3019.326815] cpu cpu0: _set_opp_voltage: failed to set voltage (950000 950000 950000 mV): -110 [ 3019.330269] __mutex_lock+0x8c/0x420 [ 3019.338821] cpu cpu0: Failed to set regulator voltages: -110 [ 3019.342883] mutex_lock_nested+0x34/0x40 [ 3019.342894] clk_prepare_lock+0x54/0xb0 [ 3019.342904] clk_prepare+0x28/0x50 [ 3019.342913] clk_bulk_prepare+0x40/0xb0 [ 3019.342922] imx8mp_blk_ctrl_power_on+0x54/0x220 [ 3019.348599] cpufreq: __target_index: Failed to change cpu frequency: -110 [ 3019.353018] _genpd_power_on+0x9c/0x180 [ 3019.353026] genpd_power_on.part.0+0xac/0x1c0 [ 3019.386800] genpd_runtime_resume+0x110/0x2e0 [ 3019.391685] __rpm_callback+0x50/0x1b0 [ 3019.395964] rpm_callback+0x74/0x80 [ 3019.399982] rpm_resume+0x434/0x6e0 [ 3019.403999] __pm_runtime_resume+0x54/0xa0 [ 3019.408626] lcdif_crtc_atomic_enable+0xa4/0x880 [imx_lcdif] [ 3019.414820] drm_atomic_helper_commit_modeset_enables+0xac/0x2b0 [ 3019.421355] drm_atomic_helper_commit_tail_rpm+0x58/0xb0 [ 3019.427195] commit_tail+0xac/0x1a0 [ 3019.431210] drm_atomic_helper_commit+0x1a0/0x1c0 [ 3019.436440] drm_atomic_commit+0x94/0x130 [ 3019.440978] drm_client_modeset_commit_atomic+0x230/0x2a0 [ 3019.446903] drm_client_modeset_commit_locked+0x68/0x1d0 [ 3019.452746] drm_client_modeset_commit+0x38/0x60 [ 3019.457891] drm_fbdev_client_restore+0x80/0xe0 [ 3019.462950] drm_client_dev_restore+0xa0/0x110 [ 3019.467920] drm_lastclose+0x40/0xb0 [ 3019.472023] drm_release+0x16c/0x190 [ 3019.476127] __fput+0x78/0x260 [ 3019.479711] ____fput+0x18/0x30 [ 3019.483378] task_work_run+0x88/0xe0 [ 3019.487484] do_notify_resume+0x20c/0x1430 [ 3019.492108] el0_svc+0x120/0x130 [ 3019.495862] el0t_64_sync_handler+0xbc/0x140 [ 3019.500658] el0t_64_sync+0x18c/0x190 [ 3019.504847] [ 3019.504847] other info that might help us debug this: [ 3019.504847] [ 3019.512851] Possible unsafe locking scenario: [ 3019.512851] [ 3019.518768] CPU0 CPU1 [ 3019.523299] ---- ---- [ 3019.527832] lock(&blk_ctrl_genpd_lock_class); [ 3019.532371] lock(prepare_lock); [ 3019.538212] lock(&blk_ctrl_genpd_lock_class); [ 3019.545269] lock(prepare_lock); [ 3019.548590] [ 3019.548590] *** DEADLOCK *** [ 3019.548590] [ 3019.554512] 7 locks held by cam/377: [ 3019.558088] #0: ffff000002f0a2f0 (&dev->clientlist_mutex){+.+.}-{3:3}, at: drm_client_dev_restore+0x5c/0x110 [ 3019.568034] #1: ffff000002388a78 (&helper->lock){+.+.}-{3:3}, at: drm_fbdev_client_restore+0x78/0xe0 [ 3019.577283] #2: ffff000002f0a1a8 (&dev->master_mutex){+.+.}-{3:3}, at: drm_master_internal_acquire+0x2c/0x70 [ 3019.587227] #3: ffff000002388898 (&client->modeset_mutex){+.+.}-{3:3}, at: drm_client_modeset_commit_locked+0x34/0x1d0 [ 3019.598036] #4: ffff80000aa13b00 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_client_modeset_commit_atomic+0x50/0x2a0 [ 3019.608759] #5: ffff000003b78138 (crtc_ww_class_mutex){+.+.}-{3:3}, at: drm_modeset_lock+0x48/0x130 [ 3019.617924] #6: ffff000000f50f90 (&blk_ctrl_genpd_lock_class){+.+.}-{3:3}, at: genpd_lock_mtx+0x20/0x30 [ 3019.627427] [ 3019.627427] stack backtrace: [ 3019.631788] CPU: 0 PID: 377 Comm: cam Not tainted 6.1.0-rc1-00233-gd15fae6050bd #298 [ 3019.639538] Hardware name: Polyhex Debix Model A i.MX8MPlus board (DT) [ 3019.646068] Call trace: [ 3019.648516] dump_backtrace+0xe4/0x140 [ 3019.652274] show_stack+0x20/0x50 [ 3019.655596] dump_stack_lvl+0x9c/0xd8 [ 3019.659263] dump_stack+0x18/0x34 [ 3019.662582] print_circular_bug+0x1f8/0x200 [ 3019.666771] check_noncircular+0x160/0x180 [ 3019.670876] __lock_acquire+0x1148/0x1910 [ 3019.674891] lock_acquire.part.0+0xec/0x260 [ 3019.679084] lock_acquire+0x68/0x90 [ 3019.682582] __mutex_lock+0x8c/0x420 [ 3019.686164] mutex_lock_nested+0x34/0x40 [ 3019.690096] clk_prepare_lock+0x54/0xb0 [ 3019.693937] clk_prepare+0x28/0x50 [ 3019.697345] clk_bulk_prepare+0x40/0xb0 [ 3019.701192] imx8mp_blk_ctrl_power_on+0x54/0x220 [ 3019.705813] _genpd_power_on+0x9c/0x180 [ 3019.709655] genpd_power_on.part.0+0xac/0x1c0 [ 3019.714020] genpd_runtime_resume+0x110/0x2e0 [ 3019.718383] __rpm_callback+0x50/0x1b0 [ 3019.722140] rpm_callback+0x74/0x80 [ 3019.725638] rpm_resume+0x434/0x6e0 [ 3019.729133] __pm_runtime_resume+0x54/0xa0 [ 3019.733238] lcdif_crtc_atomic_enable+0xa4/0x880 [imx_lcdif] [ 3019.738914] drm_atomic_helper_commit_modeset_enables+0xac/0x2b0 [ 3019.744927] drm_atomic_helper_commit_tail_rpm+0x58/0xb0 [ 3019.750248] commit_tail+0xac/0x1a0 [ 3019.753744] drm_atomic_helper_commit+0x1a0/0x1c0 [ 3019.758454] drm_atomic_commit+0x94/0x130 [ 3019.758815] cpu cpu0: _set_opp_voltage: failed to set voltage (950000 950000 950000 mV): -110 [ 3019.762469] drm_client_modeset_commit_atomic+0x230/0x2a0 [ 3019.771021] cpu cpu0: Failed to set regulator voltages: -110 [ 3019.776384] drm_client_modeset_commit_locked+0x68/0x1d0 [ 3019.776395] drm_client_modeset_commit+0x38/0x60 [ 3019.776405] drm_fbdev_client_restore+0x80/0xe0 [ 3019.782090] cpufreq: __target_index: Failed to change cpu frequency: -110 [ 3019.787367] drm_client_dev_restore+0xa0/0x110 [ 3019.787375] drm_lastclose+0x40/0xb0 [ 3019.811317] drm_release+0x16c/0x190 [ 3019.814899] __fput+0x78/0x260 [ 3019.817961] ____fput+0x18/0x30 [ 3019.821109] task_work_run+0x88/0xe0 [ 3019.824689] do_notify_resume+0x20c/0x1430 [ 3019.828795] el0_svc+0x120/0x130 [ 3019.832030] el0t_64_sync_handler+0xbc/0x140 [ 3019.836305] el0t_64_sync+0x18c/0x190 As far as I can tell, I haven't encountered the same with gpcv2, but your analysis seems correct. I'll carry this patch in my tree for a while to test it. > Signed-off-by: Marek Vasut <marex@denx.de> > --- > Cc: Fabio Estevam <festevam@denx.de> > Cc: Jacky Bai <ping.bai@nxp.com> > Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Cc: Lucas Stach <l.stach@pengutronix.de> > Cc: Peng Fan <peng.fan@nxp.com> > Cc: Shawn Guo <shawnguo@kernel.org> > Cc: Shengjiu Wang <shengjiu.wang@nxp.com> > Cc: Stephen Boyd <sboyd@kernel.org> > Cc: linux-clk@vger.kernel.org > Cc: linux-imx@nxp.com > To: linux-arm-kernel@lists.infradead.org > --- > drivers/soc/imx/gpcv2.c | 14 +++++++++++--- > 1 file changed, 11 insertions(+), 3 deletions(-) > > diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c > index 88aee59730e39..ee9294ad25ba1 100644 > --- a/drivers/soc/imx/gpcv2.c > +++ b/drivers/soc/imx/gpcv2.c > @@ -319,10 +319,16 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) > u32 reg_val, pgc; > int ret; > > + ret = clk_bulk_prepare(domain->num_clks, domain->clks); > + if (ret) { > + dev_err(domain->dev, "failed to prepare reset clocks\n"); > + return ret; > + } > + > ret = pm_runtime_get_sync(domain->dev); > if (ret < 0) { > pm_runtime_put_noidle(domain->dev); > - return ret; > + goto out_clock_unprepare; > } > > if (!IS_ERR(domain->regulator)) { > @@ -338,7 +344,7 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) > reset_control_assert(domain->reset); > > /* Enable reset clocks for all devices in the domain */ > - ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); > + ret = clk_bulk_enable(domain->num_clks, domain->clks); > if (ret) { > dev_err(domain->dev, "failed to enable reset clocks\n"); > goto out_regulator_disable; > @@ -402,12 +408,14 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) > return 0; > > out_clk_disable: > - clk_bulk_disable_unprepare(domain->num_clks, domain->clks); > + clk_bulk_disable(domain->num_clks, domain->clks); > out_regulator_disable: > if (!IS_ERR(domain->regulator)) > regulator_disable(domain->regulator); > out_put_pm: > pm_runtime_put(domain->dev); > +out_clock_unprepare: > + clk_bulk_unprepare(domain->num_clks, domain->clks); > > return ret; > }
Hi Marek, > Subject: [PATCH] [RFC] soc: imx: gpcv2: Split clock prepare from clock enable > in the domain > > It is possible for clk_disable_unused() to trigger lockdep warning regarding > lock ordering in this driver. This happens in case of the following conditions: > > A) clock core clk_disable_unused() triggers the following sequence in a > driver which also uses GPCv2 domain: > - clk_prepare_lock() -> obtains clock core prepare_lock > - pm_runtime_get*() -> obtains &blk_ctrl_genpd_lock_class > > B) driver powers up a power domain and triggers the following sequence > in GPCv2: > - pm_runtime_get_sync() -> obtains &blk_ctrl_genpd_lock_class > - clk_bulk_prepare_enable() -> obtains clock core prepare_lock > > This can lead to a deadlock in case A and B runs on separate CPUs. > > To avoid the deadlock, split clk_*prepare() from clk_*enable() and call the > former before pm_runtime_get_sync(). This way, the GPCv2 driver always > claims the prepare_lock before blk_ctrl_genpd_lock_class and the deadlock > is avoided. Is this trying to address the i.MX8MP audiomix blk ctrl deadlock issue? Thanks, Peng. > > The imx8m and imx8mp block controller drivers likely need similar fix. > > Signed-off-by: Marek Vasut <marex@denx.de> > --- > Cc: Fabio Estevam <festevam@denx.de> > Cc: Jacky Bai <ping.bai@nxp.com> > Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Cc: Lucas Stach <l.stach@pengutronix.de> > Cc: Peng Fan <peng.fan@nxp.com> > Cc: Shawn Guo <shawnguo@kernel.org> > Cc: Shengjiu Wang <shengjiu.wang@nxp.com> > Cc: Stephen Boyd <sboyd@kernel.org> > Cc: linux-clk@vger.kernel.org > Cc: linux-imx@nxp.com > To: linux-arm-kernel@lists.infradead.org > --- > drivers/soc/imx/gpcv2.c | 14 +++++++++++--- > 1 file changed, 11 insertions(+), 3 deletions(-) > > diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c index > 88aee59730e39..ee9294ad25ba1 100644 > --- a/drivers/soc/imx/gpcv2.c > +++ b/drivers/soc/imx/gpcv2.c > @@ -319,10 +319,16 @@ static int imx_pgc_power_up(struct > generic_pm_domain *genpd) > u32 reg_val, pgc; > int ret; > > + ret = clk_bulk_prepare(domain->num_clks, domain->clks); > + if (ret) { > + dev_err(domain->dev, "failed to prepare reset clocks\n"); > + return ret; > + } > + > ret = pm_runtime_get_sync(domain->dev); > if (ret < 0) { > pm_runtime_put_noidle(domain->dev); > - return ret; > + goto out_clock_unprepare; > } > > if (!IS_ERR(domain->regulator)) { > @@ -338,7 +344,7 @@ static int imx_pgc_power_up(struct > generic_pm_domain *genpd) > reset_control_assert(domain->reset); > > /* Enable reset clocks for all devices in the domain */ > - ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); > + ret = clk_bulk_enable(domain->num_clks, domain->clks); > if (ret) { > dev_err(domain->dev, "failed to enable reset clocks\n"); > goto out_regulator_disable; > @@ -402,12 +408,14 @@ static int imx_pgc_power_up(struct > generic_pm_domain *genpd) > return 0; > > out_clk_disable: > - clk_bulk_disable_unprepare(domain->num_clks, domain->clks); > + clk_bulk_disable(domain->num_clks, domain->clks); > out_regulator_disable: > if (!IS_ERR(domain->regulator)) > regulator_disable(domain->regulator); > out_put_pm: > pm_runtime_put(domain->dev); > +out_clock_unprepare: > + clk_bulk_unprepare(domain->num_clks, domain->clks); > > return ret; > } > -- > 2.35.1
On 10/24/22 02:39, Peng Fan wrote: > Hi Marek, Hi, >> Subject: [PATCH] [RFC] soc: imx: gpcv2: Split clock prepare from clock enable >> in the domain >> >> It is possible for clk_disable_unused() to trigger lockdep warning regarding >> lock ordering in this driver. This happens in case of the following conditions: >> >> A) clock core clk_disable_unused() triggers the following sequence in a >> driver which also uses GPCv2 domain: >> - clk_prepare_lock() -> obtains clock core prepare_lock >> - pm_runtime_get*() -> obtains &blk_ctrl_genpd_lock_class >> >> B) driver powers up a power domain and triggers the following sequence >> in GPCv2: >> - pm_runtime_get_sync() -> obtains &blk_ctrl_genpd_lock_class >> - clk_bulk_prepare_enable() -> obtains clock core prepare_lock >> >> This can lead to a deadlock in case A and B runs on separate CPUs. >> >> To avoid the deadlock, split clk_*prepare() from clk_*enable() and call the >> former before pm_runtime_get_sync(). This way, the GPCv2 driver always >> claims the prepare_lock before blk_ctrl_genpd_lock_class and the deadlock >> is avoided. > > Is this trying to address the i.MX8MP audiomix blk ctrl deadlock issue? See the email from Laurent from 1 hour earlier, there the splat happens with DRM subsystem (the whole split is included). Audiomix would likely trigger it too.
diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c index 88aee59730e39..ee9294ad25ba1 100644 --- a/drivers/soc/imx/gpcv2.c +++ b/drivers/soc/imx/gpcv2.c @@ -319,10 +319,16 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) u32 reg_val, pgc; int ret; + ret = clk_bulk_prepare(domain->num_clks, domain->clks); + if (ret) { + dev_err(domain->dev, "failed to prepare reset clocks\n"); + return ret; + } + ret = pm_runtime_get_sync(domain->dev); if (ret < 0) { pm_runtime_put_noidle(domain->dev); - return ret; + goto out_clock_unprepare; } if (!IS_ERR(domain->regulator)) { @@ -338,7 +344,7 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) reset_control_assert(domain->reset); /* Enable reset clocks for all devices in the domain */ - ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); + ret = clk_bulk_enable(domain->num_clks, domain->clks); if (ret) { dev_err(domain->dev, "failed to enable reset clocks\n"); goto out_regulator_disable; @@ -402,12 +408,14 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) return 0; out_clk_disable: - clk_bulk_disable_unprepare(domain->num_clks, domain->clks); + clk_bulk_disable(domain->num_clks, domain->clks); out_regulator_disable: if (!IS_ERR(domain->regulator)) regulator_disable(domain->regulator); out_put_pm: pm_runtime_put(domain->dev); +out_clock_unprepare: + clk_bulk_unprepare(domain->num_clks, domain->clks); return ret; }
It is possible for clk_disable_unused() to trigger lockdep warning regarding lock ordering in this driver. This happens in case of the following conditions: A) clock core clk_disable_unused() triggers the following sequence in a driver which also uses GPCv2 domain: - clk_prepare_lock() -> obtains clock core prepare_lock - pm_runtime_get*() -> obtains &blk_ctrl_genpd_lock_class B) driver powers up a power domain and triggers the following sequence in GPCv2: - pm_runtime_get_sync() -> obtains &blk_ctrl_genpd_lock_class - clk_bulk_prepare_enable() -> obtains clock core prepare_lock This can lead to a deadlock in case A and B runs on separate CPUs. To avoid the deadlock, split clk_*prepare() from clk_*enable() and call the former before pm_runtime_get_sync(). This way, the GPCv2 driver always claims the prepare_lock before blk_ctrl_genpd_lock_class and the deadlock is avoided. The imx8m and imx8mp block controller drivers likely need similar fix. Signed-off-by: Marek Vasut <marex@denx.de> --- Cc: Fabio Estevam <festevam@denx.de> Cc: Jacky Bai <ping.bai@nxp.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Peng Fan <peng.fan@nxp.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Shengjiu Wang <shengjiu.wang@nxp.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: linux-clk@vger.kernel.org Cc: linux-imx@nxp.com To: linux-arm-kernel@lists.infradead.org --- drivers/soc/imx/gpcv2.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-)