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authorRajendra Nayak <rnayak@codeaurora.org>2021-08-06 11:59:46 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-08-06 16:18:40 +0300
commit7b808449f572d07bee840cd9da7e2fe6a1b8f4b5 (patch)
treee82b6a1a075c53fba5eea1b2660bbb755673cbb2 /drivers/nvmem
parent11c4b3e264d68ba6dcd52d12dbcfd3f564f2f137 (diff)
downloadlinux-7b808449f572d07bee840cd9da7e2fe6a1b8f4b5.tar.xz
nvmem: qfprom: sc7280: Handle the additional power-domains vote
On sc7280, to reliably blow fuses, we need an additional vote on max performance state of 'MX' power-domain. Add support for power-domain performance state voting in the driver. Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20210806085947.22682-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
-rw-r--r--drivers/nvmem/qfprom.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
index b0ca4c626466..c500d6235bf6 100644
--- a/drivers/nvmem/qfprom.c
+++ b/drivers/nvmem/qfprom.c
@@ -12,6 +12,8 @@
#include <linux/mod_devicetable.h>
#include <linux/nvmem-provider.h>
#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
@@ -142,6 +144,9 @@ static void qfprom_disable_fuse_blowing(const struct qfprom_priv *priv,
writel(old->timer_val, priv->qfpconf + QFPROM_BLOW_TIMER_OFFSET);
writel(old->accel_val, priv->qfpconf + QFPROM_ACCEL_OFFSET);
+ dev_pm_genpd_set_performance_state(priv->dev, 0);
+ pm_runtime_put(priv->dev);
+
/*
* This may be a shared rail and may be able to run at a lower rate
* when we're not blowing fuses. At the moment, the regulator framework
@@ -212,6 +217,14 @@ static int qfprom_enable_fuse_blowing(const struct qfprom_priv *priv,
goto err_clk_rate_set;
}
+ ret = pm_runtime_get_sync(priv->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(priv->dev);
+ dev_err(priv->dev, "Failed to enable power-domain\n");
+ goto err_reg_enable;
+ }
+ dev_pm_genpd_set_performance_state(priv->dev, INT_MAX);
+
old->timer_val = readl(priv->qfpconf + QFPROM_BLOW_TIMER_OFFSET);
old->accel_val = readl(priv->qfpconf + QFPROM_ACCEL_OFFSET);
writel(priv->soc_data->qfprom_blow_timer_value,
@@ -221,6 +234,8 @@ static int qfprom_enable_fuse_blowing(const struct qfprom_priv *priv,
return 0;
+err_reg_enable:
+ regulator_disable(priv->vcc);
err_clk_rate_set:
clk_set_rate(priv->secclk, old->clk_rate);
err_clk_prepared:
@@ -320,6 +335,11 @@ static int qfprom_reg_read(void *context,
return 0;
}
+static void qfprom_runtime_disable(void *data)
+{
+ pm_runtime_disable(data);
+}
+
static const struct qfprom_soc_data qfprom_7_8_data = {
.accel_value = 0xD10,
.qfprom_blow_timer_value = 25,
@@ -420,6 +440,11 @@ static int qfprom_probe(struct platform_device *pdev)
econfig.reg_write = qfprom_reg_write;
}
+ pm_runtime_enable(dev);
+ ret = devm_add_action_or_reset(dev, qfprom_runtime_disable, dev);
+ if (ret)
+ return ret;
+
nvmem = devm_nvmem_register(dev, &econfig);
return PTR_ERR_OR_ZERO(nvmem);