mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
drivers: nvmem: Fix voltage settings for QTI qfprom-efuse
[ Upstream commit9ec4f4b0e9
] QFPROM controller hardware requires 1.8V min for fuse blowing. So, this change sets the voltage to 1.8V, required to blow the fuse for qfprom-efuse controller. To disable fuse blowing, we set the voltage to 0V since this may be a shared rail and may be able to run at a lower rate when we're not blowing fuses. Fixes:93b4e49f8c
("nvmem: qfprom: Add fuse blowing support") Reported-by: Douglas Anderson <dianders@chromium.org> Suggested-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Ravi Kumar Bokka <rbokka@codeaurora.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20210330111241.19401-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
409ab5a9d8
commit
100a5c76e5
1 changed files with 21 additions and 0 deletions
|
@ -104,6 +104,16 @@ static void qfprom_disable_fuse_blowing(const struct qfprom_priv *priv,
|
|||
{
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* 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
|
||||
* applies voltage constraints even on disabled rails, so remove our
|
||||
* constraints and allow the rail to be adjusted by other users.
|
||||
*/
|
||||
ret = regulator_set_voltage(priv->vcc, 0, INT_MAX);
|
||||
if (ret)
|
||||
dev_warn(priv->dev, "Failed to set 0 voltage (ignoring)\n");
|
||||
|
||||
ret = regulator_disable(priv->vcc);
|
||||
if (ret)
|
||||
dev_warn(priv->dev, "Failed to disable regulator (ignoring)\n");
|
||||
|
@ -149,6 +159,17 @@ static int qfprom_enable_fuse_blowing(const struct qfprom_priv *priv,
|
|||
goto err_clk_prepared;
|
||||
}
|
||||
|
||||
/*
|
||||
* Hardware requires 1.8V min for fuse blowing; this may be
|
||||
* a rail shared do don't specify a max--regulator constraints
|
||||
* will handle.
|
||||
*/
|
||||
ret = regulator_set_voltage(priv->vcc, 1800000, INT_MAX);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to set 1.8 voltage\n");
|
||||
goto err_clk_rate_set;
|
||||
}
|
||||
|
||||
ret = regulator_enable(priv->vcc);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to enable regulator\n");
|
||||
|
|
Loading…
Reference in a new issue