kernel/linux.git/drivers/soc/tegra, branch v4.11.5

soc/tegra: pmc: Use consistent naming for PM domains

2016-11-15T14:51:56+00:00

The various error messages refer to the PM domains as "power domain", "genpd" and "PM domain". That's confusing, so convert all error messages to use the most prominent: "PM domain". Acked-by: Jon Hunter Signed-off-by: Thierry Reding

soc/tegra: pmc: Remove genpd when adding provider fails

2016-11-15T14:51:55+00:00

Commit 3fe577107ccf ("PM / Domains: Add support for removing PM domains") add support for removing PM domains. Update the Tegra PMC driver to remove PM domains if we fail to add a provider for the PM domain. Please note that the code under 'power_on_cleanup' label does not really belong in the clean-up error path for tegra_powergate_add(). To keep the error path simple, remove this label and move the associated code to where it needs to be invoked. Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding

soc/tegra: pmc: Check return code for pm_genpd_init()

2016-11-15T14:51:54+00:00

Commit 7eb231c337e0 ("PM / Domains: Convert pm_genpd_init() to return an error code") updated pm_genpd_init() to return an error code. Update the Tegra PMC driver to check the return value from pm_genpd_init() and handle any errors returned. Signed-off-by: Jon Hunter [treding@nvidia.com: use pr_err() instead of dev_err()] Signed-off-by: Thierry Reding

soc/tegra: pmc: Clean-up I/O rail error messages

2016-11-15T14:51:53+00:00

Use pr_err() instead of dev_err() when the pmc->dev field has not been initialized yet and add a few missing error messages as well as remove duplicate ones. Based on work by Jon Hunter . Signed-off-by: Thierry Reding

soc/tegra: pmc: Simplify IO rail bit handling

2016-11-15T14:51:53+00:00

The function tegra_io_rail_prepare() converts the IO rail ID into a bit position that is used to check the status and control the IO rail in the PMC registers. However, rather than converting to a bit position it is more useful to convert to a bit-mask because this is what is actually used. By doing so the BIT() marco only needs to be used once and we can use the IO_DPD_REQ_CODE_MASK when checking for erroneous rail IDs. Signed-off-by: Jon Hunter [treding@nvidia.com: rebase and rename bit -> mask] Signed-off-by: Thierry Reding

soc/tegra: pmc: Guard against uninitialised PMC clock

2016-11-15T14:51:52+00:00

It is possible for the public functions, tegra_io_rail_power_on/off() to be called before the PMC device has been probed. If this happens then the pmc->clk member will not be initialised and the call to clk_get_rate() in tegra_io_rail_prepare() will return zero and lead to a divide-by-zero exception. The function clk_get_rate() will return zero if a NULl clk pointer is passed. Therefore, rather that checking if pmc->clk is initialised, fix this by checking the return value for clk_get_rate() to make sure it is not zero. Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding

soc/tegra: pmc: Add I/O pad voltage support

2016-11-15T14:51:51+00:00

I/O pins on Tegra SoCs are grouped into so-called I/O pads. Each such pad can be used to control the common voltage signal level and power state of the pins in the given pad. I/O pads can be powered down even if the system is active, which can save power from that I/O interface. For SoC generations prior to Tegra124 the I/O pad voltage is automatically detected and hence the system software doesn't need to configure it. However, starting with Tegra210 the detection logic has been removed, so explicit control of the I/O pad voltage by system software is required. Signed-off-by: Laxman Dewangan Signed-off-by: Thierry Reding

soc/tegra: pmc: Use consistent ordering of bit definitions

2016-11-15T14:51:51+00:00

Bit definitions are sorted in decreasing order by offset. Apply the same ordering to all definitions. Signed-off-by: Thierry Reding

soc/tegra: pmc: Correct type of variable for tegra_pmc_readl()

2016-11-15T14:51:50+00:00

The function tegra_pmc_readl() returns the u32 type data and hence change the data type of variable where this data is stored to u32 type. Signed-off-by: Laxman Dewangan Reviewed-by: Jon Hunter Signed-off-by: Thierry Reding

soc/tegra: pmc: Use BIT macro for register field definition

2016-11-15T14:51:49+00:00

Use BIT macro for register field definition and make constant as U when using in shift operator like (3 << 30) to (3U << 30) Signed-off-by: Laxman Dewangan Acked-by: Jon Hunter Signed-off-by: Thierry Reding