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remoteproc: stm32: track the coprocessor state in a backup register

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Update the dedicated backup register to track the coprocessor state and
rely on that register to compute the .is_running() value (which expects
a return value of 0 -not 1- if the processor is running).

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Acked-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Fabien Dessenne 2019-10-30 14:38:31 +01:00 committed by Tom Rini
parent 7bff971a14
commit 4a4deb870f
1 changed files with 5 additions and 12 deletions
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17
drivers/remoteproc/stm32_copro.c
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@ -22,14 +22,12 @@
* @hold_boot_regmap: regmap for remote processor reset hold boot
* @hold_boot_offset: offset of the register controlling the hold boot setting
* @hold_boot_mask: bitmask of the register for the hold boot field
* @is_running: is the remote processor running
*/
struct stm32_copro_privdata {
struct reset_ctl reset_ctl;
struct regmap *hold_boot_regmap;
uint hold_boot_offset;
uint hold_boot_mask;
bool is_running;
};
/**
@ -165,11 +163,8 @@ static int stm32_copro_load(struct udevice *dev, ulong addr, ulong size)
*/
static int stm32_copro_start(struct udevice *dev)
{
struct stm32_copro_privdata *priv;
int ret;
priv = dev_get_priv(dev);
/* move hold boot from true to false start the copro */
ret = stm32_copro_set_hold_boot(dev, false);
if (ret)
@ -180,7 +175,8 @@ static int stm32_copro_start(struct udevice *dev)
* rebooting autonomously
*/
ret = stm32_copro_set_hold_boot(dev, true);
priv->is_running = !ret;
writel(ret ? TAMP_COPRO_STATE_OFF : TAMP_COPRO_STATE_CRUN,
TAMP_COPRO_STATE);
return ret;
}
@ -206,7 +202,7 @@ static int stm32_copro_reset(struct udevice *dev)
return ret;
}
priv->is_running = false;
writel(TAMP_COPRO_STATE_OFF, TAMP_COPRO_STATE);
return 0;
}
@ -224,14 +220,11 @@ static int stm32_copro_stop(struct udevice *dev)
/**
* stm32_copro_is_running() - Is the STM32 remote processor running
* @dev: corresponding STM32 remote processor device
* @return 1 if the remote processor is running, 0 otherwise
* @return 0 if the remote processor is running, 1 otherwise
*/
static int stm32_copro_is_running(struct udevice *dev)
{
struct stm32_copro_privdata *priv;
priv = dev_get_priv(dev);
return priv->is_running;
return (readl(TAMP_COPRO_STATE) == TAMP_COPRO_STATE_OFF);
}
static const struct dm_rproc_ops stm32_copro_ops = {