This driver converts voltages from a non-linear range in hardware
to a linear range in software and vice versa. During the
conversion, we exclude certain voltages that are invalid to use
because the software interface is more flexible than reality.
For example, the FTSMPS2P5 regulators have a voltage range from
80000uV to 1355000uV that software could support, but we only
want to use the range of 350000uV to 1355000uV. If we don't
account for the hw selectors between 80000uV and 350000uV we'll
pick a hw selector of 0 to mean 350000uV when it really means
80000uV. This can cause us to program voltages into the hardware
that are significantly lower than what we're expecting.
And when we read it back from the hardware we'll have the same
problem, voltages that are in the invalid band will end up being
calculated as some software selector that represents a larger
voltage than what is programmed and the user will be confused.
Fix all this by properly offsetting the software selector and hw
selector when converting from one number space to another.
Fixes: 1b5b196892 ("regulator: qcom_spmi: Only use selector based regulator ops")
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Document the regulators available on pmi8994 and add support for
this PMIC to the SPMI PMIC regulator driver.
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The voltage switches support mode switching, so add support for
these ops to those types of regulators.
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: e92a404741 ("regulator: Add QCOM SPMI regulator driver")
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The mvs1 and mvs2 switches are actually called 5vs1 and 5vs2 on
some datasheets. Let's rename them to match the datasheets and
also match the RPM based regulator driver which calls these by
their 5vs names (see qcom_smd-regulator.c). There aren't any
users of these regulators so far, so there aren't any concerns of
DT ABI breakage here. While we're here making updates to the
switches, also mandate usage of the OCP irq for these switches
too.
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: e92a404741 ("regulator: Add QCOM SPMI regulator driver")
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The S4 supply is sometimes called the boost regulator because it
outputs 5V. Typically it's connected to the 5vs1 and 5vs2
switches for use in USB OTG and HDMI applications. Add support
for this regulator which was mistakenly left out from the initial
submission of this driver.
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: e92a404741 ("regulator: Add QCOM SPMI regulator driver")
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
I had a thinko in spmi_regulator_select_voltage_same_range() when
converting it to return selectors via the function's return value
instead of by modifying a pointer argument. I only tested
multi-range regulators so this passed through testing. Fix it by
returning the selector here.
Fixes: 1b5b196892 ("regulator: qcom_spmi: Only use selector based regulator ops")
Reported-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Mixing raw voltage and selector based regulator ops is
inconsistent. This driver already supports some selector based
ops via the list_voltage and set_voltage_time_sel ops but it uses
raw voltage ops for get_voltage and set_voltage. This causes
problems for regulator_set_voltage() and automatic insertion of
slewing delays because set_voltage_time_sel() is only used if the
regulator ops are all selector based. Put another way, delays
aren't happening at all right now when we should be waiting for
voltages to settle. Let's move to pure selector based regulator
ops so that the delays are inserted properly.
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Only the FT SMPS type regulators have slewing supported in the
driver, but all types of SMPS regulators need the same support.
The only difference is that some SMPS regulators don't have a
step size and the step delay is typically 20, not 8. Luckily, the
step size reads as 0 for the non-FT types, so we can always read
that, but we need to detect which type of regulator we're using
to figure out what step delay to use. Make these minor
adjustments to the slew rate calculations and add support for the
delay function to the appropriate regulator ops.
Reported-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
On some designs, a handful of the regulators can't be read via
SPMI transactions because they're "secure" and not intended to be
touched by non-secure processors. This driver unconditionally
attempts to read the id registers of all the regulators though,
leading to probe failing and no regulators being registered.
Let's ignore any errors from failing to read the registers and
keep adding other regulators so that this driver can probe on
such devices.
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Document the regulators available on pm8994 and add support for
this PMIC to the SPMI PMIC regulator driver.
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add support for over current protection (OCP), pin control
selection, soft start strength, and auto-mode.
Cc: <devicetree@vger.kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
n /= range->step_uV + 1; is equivalent to n /= (range->step_uV + 1);
which is wrong. Fix it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
drivers/regulator/qcom_spmi-regulator.c:751:3-50: code aligned
with following code on line 753
drivers/regulator/qcom_spmi-regulator.c:584:3-41: code aligned
with following code on line 587
These lines where missing braces causing the break to always
be executed even when it shouldn't be. Fix it.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Reviewed-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Simplify a trivial if-return sequence and combine with a
preceding function call.
Generated by: scripts/coccinelle/misc/simple_return.cocci
CC: Mark Brown <broonie@kernel.org>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add an SPMI regulator driver for Qualcomm's PM8841, PM8941, and
PM8916 PMICs. This driver is based largely on code from
codeaurora.org[1].
[1] https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/tree/drivers/regulator/qpnp-regulator.c?h=msm-3.10
Cc: David Collins <collinsd@codeaurora.org>
Cc: <devicetree@vger.kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
