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soc: amlogic: meson-gx-pwrc-vpu: fix power-off when powered by bootloader

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In the case the VPU power domain has been powered on by the bootloader
and no driver are attached to this power domain, the genpd will power it
off after a certain amount of time, but the clocks hasn't been enabled
by the kernel itself and the power-off will trigger some faults.
This patch enable the clocks to have a coherent state for an eventual
poweroff and switches to the pm_domain_always_on_gov governor.

Fixes: 75fcb5ca4b ("soc: amlogic: add Meson GX VPU Domains driver")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Neil Armstrong 2017-11-03 16:43:24 +01:00 committed by Arnd Bergmann
parent ad54c3e75d
commit 339cd0ea08
1 changed files with 19 additions and 10 deletions
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29
drivers/soc/amlogic/meson-gx-pwrc-vpu.c
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@ -34,7 +34,6 @@ struct meson_gx_pwrc_vpu {
struct reset_control *rstc;
struct clk *vpu_clk;
struct clk *vapb_clk;
bool powered;
};
static inline
@ -78,8 +77,6 @@ static int meson_gx_pwrc_vpu_power_off(struct generic_pm_domain *genpd)
clk_disable_unprepare(pd->vpu_clk);
clk_disable_unprepare(pd->vapb_clk);
pd->powered = false;
return 0;
}
@ -91,7 +88,11 @@ static int meson_gx_pwrc_vpu_setup_clk(struct meson_gx_pwrc_vpu *pd)
if (ret)
return ret;
return clk_prepare_enable(pd->vapb_clk);
ret = clk_prepare_enable(pd->vapb_clk);
if (ret)
clk_disable_unprepare(pd->vpu_clk);
return ret;
}
static int meson_gx_pwrc_vpu_power_on(struct generic_pm_domain *genpd)
@ -139,8 +140,6 @@ static int meson_gx_pwrc_vpu_power_on(struct generic_pm_domain *genpd)
if (ret)
return ret;
pd->powered = true;
return 0;
}
@ -167,6 +166,8 @@ static int meson_gx_pwrc_vpu_probe(struct platform_device *pdev)
struct reset_control *rstc;
struct clk *vpu_clk;
struct clk *vapb_clk;
bool powered_off;
int ret;
regmap_ao = syscon_node_to_regmap(of_get_parent(pdev->dev.of_node));
if (IS_ERR(regmap_ao)) {
@ -205,8 +206,17 @@ static int meson_gx_pwrc_vpu_probe(struct platform_device *pdev)
vpu_hdmi_pd.vpu_clk = vpu_clk;
vpu_hdmi_pd.vapb_clk = vapb_clk;
pm_genpd_init(&vpu_hdmi_pd.genpd, &simple_qos_governor,
meson_gx_pwrc_vpu_get_power(&vpu_hdmi_pd));
powered_off = meson_gx_pwrc_vpu_get_power(&vpu_hdmi_pd);
/* If already powered, sync the clock states */
if (!powered_off) {
ret = meson_gx_pwrc_vpu_setup_clk(&vpu_hdmi_pd);
if (ret)
return ret;
}
pm_genpd_init(&vpu_hdmi_pd.genpd, &pm_domain_always_on_gov,
powered_off);
return of_genpd_add_provider_simple(pdev->dev.of_node,
&vpu_hdmi_pd.genpd);
@ -214,8 +224,7 @@ static int meson_gx_pwrc_vpu_probe(struct platform_device *pdev)
static void meson_gx_pwrc_vpu_shutdown(struct platform_device *pdev)
{
if (vpu_hdmi_pd.powered)
meson_gx_pwrc_vpu_power_off(&vpu_hdmi_pd.genpd);
meson_gx_pwrc_vpu_power_off(&vpu_hdmi_pd.genpd);
}
static const struct of_device_id meson_gx_pwrc_vpu_match_table[] = {