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| author | Vince Hsu <vinceh@nvidia.com> | 2016-08-11 09:13:36 +0800 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2016-08-16 12:30:52 +0200 |
| commit | a9ccc123a8e05365f7515dcd023b01100809a6fa (patch) | |
| tree | 4f0e5fac730e70f93b705fc61abc65bd394398aa /drivers/soc | |
| parent | 29b4817d4018df78086157ea3a55c1d9424a7cfc (diff) | |
| download | linux-rpi-a9ccc123a8e05365f7515dcd023b01100809a6fa.tar.gz linux-rpi-a9ccc123a8e05365f7515dcd023b01100809a6fa.tar.bz2 linux-rpi-a9ccc123a8e05365f7515dcd023b01100809a6fa.zip | |
soc/tegra: pmc: Fix incorrect DPD request
Reading the DPD_REQ & DPD2_REQ registers returns the previous requests.
If we sets the current request bit with the returned value, then other
pads will be turned on or off unexpectedly.
Signed-off-by: Vince Hsu <vinceh@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/tegra/pmc.c | 28 |
1 files changed, 8 insertions, 20 deletions
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index 71c834f3847e..7792ed88d80b 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -967,8 +967,8 @@ static void tegra_io_rail_unprepare(void) int tegra_io_rail_power_on(unsigned int id) { - unsigned long request, status, value; - unsigned int bit, mask; + unsigned long request, status; + unsigned int bit; int err; mutex_lock(&pmc->powergates_lock); @@ -977,15 +977,9 @@ int tegra_io_rail_power_on(unsigned int id) if (err) goto error; - mask = 1 << bit; + tegra_pmc_writel(IO_DPD_REQ_CODE_OFF | BIT(bit), request); - value = tegra_pmc_readl(request); - value |= mask; - value &= ~IO_DPD_REQ_CODE_MASK; - value |= IO_DPD_REQ_CODE_OFF; - tegra_pmc_writel(value, request); - - err = tegra_io_rail_poll(status, mask, 0, 250); + err = tegra_io_rail_poll(status, BIT(bit), 0, 250); if (err) { pr_info("tegra_io_rail_poll() failed: %d\n", err); goto error; @@ -1002,8 +996,8 @@ EXPORT_SYMBOL(tegra_io_rail_power_on); int tegra_io_rail_power_off(unsigned int id) { - unsigned long request, status, value; - unsigned int bit, mask; + unsigned long request, status; + unsigned int bit; int err; mutex_lock(&pmc->powergates_lock); @@ -1014,15 +1008,9 @@ int tegra_io_rail_power_off(unsigned int id) goto error; } - mask = 1 << bit; - - value = tegra_pmc_readl(request); - value |= mask; - value &= ~IO_DPD_REQ_CODE_MASK; - value |= IO_DPD_REQ_CODE_ON; - tegra_pmc_writel(value, request); + tegra_pmc_writel(IO_DPD_REQ_CODE_ON | BIT(bit), request); - err = tegra_io_rail_poll(status, mask, mask, 250); + err = tegra_io_rail_poll(status, BIT(bit), BIT(bit), 250); if (err) goto error; |