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QMP PHY for USB/PCIE requires pipe_clk for locking of
retime buffers at the pipe interface. Driver checks for
PHY_STATUS without enabling pipe_clk due to which
phy_init() fails with initialization timeout.
Though pipe_clk is output from PHY (after PLL is programmed
during initialization sequence) to GCC clock_ctl and then fed
back to PHY but for PHY_STATUS register to reflect successful
initialization pipe_clk from GCC must be present.
Since, clock driver now ignores status_check for pipe_clk on
clk_enable/disable, driver can safely enable/disable pipe_clk
from phy_init/exit.
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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The SPDX identifier is a legally binding shorthand, which
can be used instead of the full boiler plate text.
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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Disable clocks and enable PHY autonomous mode to detect
wakeup events when PHY is suspended.
Core driver should notify speed to PHY driver to enable
LFPS and/or RX_DET interrupts.
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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QMP V3 USB3 PHY is a DisplayPort (DP) and USB combo PHY
with dual RX/TX lanes to support type-c. There is a
separate block DP_COM for configuration related to type-c
or DP. Add support for dp_com region and secondary rx/tx
lanes initialization.
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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New revision (v3) of QMP PHY uses different offsets
for almost all of the registers. Hence, move these
definitions to header file so that updated offsets
can be added for QMP v3.
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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Driver is currently performing PHY reset after starting
SERDES/PCS. As per hardware datasheet reset must be done
before starting PHY. Hence, update the sequence.
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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PHY block or asynchronous reset requires signal
to be asserted before de-asserting. Driver is only
de-asserting signal which is already low, hence
reset operation is a no-op. Fix this by asserting
signal first. Also, resetting requires PHY clocks
to be turned ON only after reset is finished. Fix
that as well.
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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PHY regulators which are enabled from power_on() must be ON
before turning-on clocks and initializing it as part of init().
As most of the core drivers perform power_on() after init(), move
PHY regulators enable to com_init() and use power_on() to
only enable pipe_clk. This pipe_clk is output from PHY and some
core drivers e.g. PCIe follow specific sequence after phy_init()
that mandates pipe_clk to be enabled from power_on() only.
On similar lines move clk_enable from init() to com_init() which
executes once for multi lane PHYs.
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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Move from using array of clocks to clk_bulk_* APIs that
are available now.
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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Pipe clock comes out of the phy and is available as long as
the phy is turned on. Clock controller fails to gate this
clock after the phy is turned off and generates a warning.
/ # [ 33.048561] gcc_usb3_phy_pipe_clk status stuck at 'on'
[ 33.048585] ------------[ cut here ]------------
[ 33.052621] WARNING: CPU: 1 PID: 18 at ../drivers/clk/qcom/clk-branch.c:97 clk_branch_wait+0xf0/0x108
[ 33.057384] Modules linked in:
[ 33.066497] CPU: 1 PID: 18 Comm: kworker/1:0 Tainted: G W 4.12.0-rc7-00024-gfe926e34c36d-dirty #96
[ 33.069451] Hardware name: Qualcomm Technologies, Inc. DB820c (DT)
...
[ 33.278565] [<ffff00000849b27c>] clk_branch_wait+0xf0/0x108
[ 33.286375] [<ffff00000849b2f4>] clk_branch2_disable+0x28/0x34
[ 33.291761] [<ffff0000084868dc>] clk_core_disable+0x5c/0x88
[ 33.297660] [<ffff000008487d68>] clk_core_disable_lock+0x20/0x34
[ 33.303129] [<ffff000008487d98>] clk_disable+0x1c/0x24
[ 33.309384] [<ffff0000083ccd78>] qcom_qmp_phy_poweroff+0x20/0x48
[ 33.314328] [<ffff0000083c53f4>] phy_power_off+0x80/0xdc
[ 33.320492] [<ffff00000875c950>] dwc3_core_exit+0x94/0xa0
[ 33.325784] [<ffff00000875c9ac>] dwc3_suspend_common+0x50/0x60
[ 33.331080] [<ffff00000875ca04>] dwc3_runtime_suspend+0x48/0x6c
[ 33.336810] [<ffff0000085b82f4>] pm_generic_runtime_suspend+0x28/0x38
[ 33.342627] [<ffff0000085bace0>] __rpm_callback+0x150/0x254
[ 33.349222] [<ffff0000085bae08>] rpm_callback+0x24/0x78
[ 33.354604] [<ffff0000085b9fd8>] rpm_suspend+0xe0/0x4e4
[ 33.359813] [<ffff0000085bb784>] pm_runtime_work+0xdc/0xf0
[ 33.365028] [<ffff0000080d7b30>] process_one_work+0x12c/0x28c
[ 33.370576] [<ffff0000080d7ce8>] worker_thread+0x58/0x3b8
[ 33.376393] [<ffff0000080dd4a8>] kthread+0x100/0x12c
[ 33.381776] [<ffff0000080836c0>] ret_from_fork+0x10/0x50
Fix this by disabling it as the first thing in phy_exit().
Fixes: e78f3d15e115 ("phy: qcom-qmp: new qmp phy driver for qcom-chipsets")
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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Fixing the clk enable failure path in qcom_qmp_phy_init()
and cleanup the reset control deassertion failure path in
qcom_qmp_phy_com_init().
Fixes: e78f3d15e115 ("phy: qcom-qmp: new qmp phy driver for qcom-chipsets")
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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Add definitions required to enable QMP phy support for IPQ8074.
Signed-off-by: smuthayy <smuthayy@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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Presently, the phy pipe clock's name is assumed to be either
usb3_phy_pipe_clk_src or pcie_XX_pipe_clk_src (where XX is the
phy lane's number). However, this will not work if an SoC has
more than one instance of the phy. Hence, instead of assuming
the name of the clock, fetch it from the DT.
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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Adding vendor specific directories in phy to group
phy drivers under their respective vendor umbrella.
Also updated the MAINTAINERS file to reflect the correct
directory structure for phy drivers.
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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