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The TI J721e Wiz clock implements a mux with a set_parent
hook, but doesn't provide a determine_rate implementation.
This is a bit odd, since set_parent() is there to, as its name implies,
change the parent of a clock. However, the most likely candidate to
trigger that parent change is a call to clk_set_rate(), with
determine_rate() figuring out which parent is the best suited for a
given rate.
The other trigger would be a call to clk_set_parent(), but it's far less
used, and it doesn't look like there's any obvious user for that clock.
So, the set_parent hook is effectively unused, possibly because of an
oversight. However, it could also be an explicit decision by the
original author to avoid any reparenting but through an explicit call to
clk_set_parent().
The latter case would be equivalent to setting the flag
CLK_SET_RATE_NO_REPARENT, together with setting our determine_rate hook
to __clk_mux_determine_rate(). Indeed, if no determine_rate
implementation is provided, clk_round_rate() (through
clk_core_round_rate_nolock()) will call itself on the parent if
CLK_SET_RATE_PARENT is set, and will not change the clock rate
otherwise.
And if it was an oversight, then we are at least explicit about our
behavior now and it can be further refined down the line.
Since the CLK_SET_RATE_NO_REPARENT flag was already set though, it seems
unlikely.
Cc: Kishon Vijay Abraham I <kishon@kernel.org>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: linux-phy@lists.infradead.org
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20221018-clk-range-checks-fixes-v4-44-971d5077e7d2@cerno.tech
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Enable full rate divider configuration support for J721E_WIZ_16G for SGMII.
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20230309092434.443550-1-s-vadapalli@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
In the wiz_mode_select() function, the configuration performed for
PHY_TYPE_USXGMII is unreachable. Fix it.
Fixes: b64a85fb8f53 ("phy: ti: phy-j721e-wiz.c: Add usxgmii support in wiz driver")
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20230403094552.929108-1-s-vadapalli@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230307115900.2293120-29-u.kleine-koenig@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The WIZ acts as a wrapper for SerDes and has Lanes 0 and 2 reserved
for USB for type-C lane swap if Lane 1 and Lane 3 are linked to the
USB PHY that is integrated into the SerDes IP. The WIZ control register
has to be configured to support this lane swap feature.
The support for swapping lanes 2 and 3 is missing and therefore
add support to configure the control register to swap between
lanes 2 and 3 if PHY type is USB.
Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20230113150615.19375-3-sinthu.raja@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
It's possible that the Type-C plug orientation on the DIR line will be
implemented through hardware design. In that situation, there won't be
an external GPIO line available, but the driver still needs to address
this since the DT won't use the typec-dir-gpios property.
Add code to handle LN10 Type-C swap if typec-dir-gpios property is not
specified in DT.
Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20230113150615.19375-2-sinthu.raja@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Add support for j721s2-wiz-10g device which is similar to j721e-wiz-10g but
uses clock-names interface versus explicitly defining clock nodes within
device tree node.
Signed-off-by: Matt Ranostay <mranostay@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20221123032413.1193961-3-mranostay@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Add support for j784s4-wiz-10g device which has two core reference
clocks (e.g core_ref_clk, core_ref1_clk) which requires an additional
mux selection option.
Acked-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: Matt Ranostay <mranostay@ti.com>
Link: https://lore.kernel.org/r/20221015201123.195477-3-mranostay@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
These two error paths need to call of_node_put(child_node) before
returning.
Fixes: edd473d4293a ("phy: ti: phy-j721e-wiz: add support for j7200-wiz-10g")
Fixes: 7ae14cf581f2 ("phy: ti: j721e-wiz: Implement DisplayPort mode to the wiz driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/YyxFI8aW23IC/21U@kili
Signed-off-by: Vinod Koul <vkoul@kernel.org>
When multiple serdes instances are initialized the first will succeed but
additional will conflict over clocks names and probing fails.
Signed-off-by: Matt Ranostay <mranostay@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20220909200026.3422-1-mranostay@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
For J7200-SR2.0 and AM64 we don't model Common refclock divider as
a clock divider as the divisor rate is fixed based on operating
reference clock frequency. We just program the recommended value
into the register. This simplifies the device tree and implementation
a lot.
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20220628122255.24265-8-rogerq@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
j7200-wiz-10g supports 2 reference clocks. However, the
control bits for these clocks is in a separate register that
sits in the System Control register space. Handle that register.
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20220628122255.24265-7-rogerq@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Changes the wiz_p_mac_div_sel() and wiz_mode_select() to
configure serdes for USXGMII.
Adds the support to configure mac_src_sel, refclk_sel and
rxfclk_sel in the LANECTL register and configures the serdes for
usxgmii.
[rogerq] Fix MAC_SRC_SEL to 0x3 for USXGMII as per CSL code.
Signed-off-by: Tanmay Patil <t-patil@ti.com>
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20220628122255.24265-4-rogerq@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Select the same mac divider for SGMII too as the one being used for
QSGMII.
Enable full rate divider configuration support for J721E_WIZ_10G for
SGMII.
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20220628122255.24265-2-rogerq@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Move device specific data into OF data structure so it
is easier to maintain and we can get rid of if statements.
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Matt Ranostay <mranostay@ti.com>
Link: https://lore.kernel.org/r/20220526064121.27625-1-rogerq@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Do not use "/**" to begin a non-kernel-doc comment.
Fixes these build warnings:
drivers/phy/ti/phy-am654-serdes.c:3: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* PCIe SERDES driver for AM654x SoC
drivers/phy/ti/phy-j721e-wiz.c:3: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Wrapper driver for SERDES used in J721E
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: linux-phy@lists.infradead.org
Link: https://lore.kernel.org/r/20211115030559.13994-1-rdunlap@infradead.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
When the code execute this if statement, the value of ret is 0.
However, we can see from the dev_err() log that the value of
ret should be -EINVAL.
Clean up smatch warning:
drivers/phy/ti/phy-j721e-wiz.c:1216 wiz_probe() warn: missing error code 'ret'
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Fixes: c9f9eba06629 ("phy: ti: j721e-wiz: Manage typec-gpio-dir")
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/1621939832-65535-1-git-send-email-yang.lee@linux.alibaba.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
When compiling with CONFIG_PHY_J721E_WIZ, Hulk Robot reported:
drivers/phy/ti/phy-j721e-wiz.c: In function ‘wiz_mux_clk_register’:
drivers/phy/ti/phy-j721e-wiz.c:659:17: error: implicit declaration of function ‘kzalloc’; did you mean ‘vzalloc’? [-Werror=implicit-function-declaration]
659 | parent_names = kzalloc((sizeof(char *) * num_parents), GFP_KERNEL);
| ^~~~~~~
| vzalloc
drivers/phy/ti/phy-j721e-wiz.c:659:15: warning: assignment to ‘const char **’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
659 | parent_names = kzalloc((sizeof(char *) * num_parents), GFP_KERNEL);
| ^
drivers/phy/ti/phy-j721e-wiz.c:697:2: error: implicit declaration of function ‘kfree’; did you mean ‘vfree’? [-Werror=implicit-function-declaration]
697 | kfree(parent_names);
| ^~~~~
| vfre
Fixes: 040cbe768731 ("phy: ti: j721e-wiz: Model the internal clocks without device tree input")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Shixin Liu <liushixin2@huawei.com>
Link: https://lore.kernel.org/r/20210408012829.432938-1-liushixin2@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Configure 'p_standard_mode' only for DP/QSGMII as for other modes
it's not used as per the programming sequence. Add "continue" in the
else to prevent random value from being written to p_standard_mode.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20210331131417.15596-1-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Serdes lanes might be shared between multiple cores in some usecases
and its not possible to lock PLLs for both the lanes independently
by the two cores. This requires a bootloader to configure both the
lanes at early boot time.
To handle this case, skip all configuration if any of the lanes has
already been enabled.
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20210330110138.24356-2-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
"serdes" node (child node of WIZ) can have sub-nodes for representing links
or it can have sub-nodes for representing the various clocks within the
serdes. Instead of trying to read "reg" from every child node used for
assigning "lane_phy_type", read only if the child node's name is "phy"
or "link" subnode.
Ideally all PHY dt nodes should have node name as "phy", however
existing devicetree used "link" as subnode. So in order to maintain old
DT compatibility get PHY properties for "phy" or "link" subnode.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20210319124128.13308-5-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Invoke wiz_init() before configuring anything else in Sierra/Torrent
(invoked as part of of_platform_device_create()). wiz_init() resets the
SERDES device and any configuration done in the probe() of
Sierra/Torrent will be lost. In order to prevent SERDES configuration
from getting reset, invoke wiz_init() immediately before invoking
of_platform_device_create().
Fixes: 091876cc355d ("phy: ti: j721e-wiz: Add support for WIZ module present in TI J721E SoC")
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Swapnil Jakhade <sjakhade@cadence.com>
Cc: <stable@vger.kernel.org> # v5.10
Link: https://lore.kernel.org/r/20210319124128.13308-3-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
In one of the error paths of the for_each_child_of_node() loop in
of_property_read_u32, add missing call to of_node_put().
Fix the following coccicheck warning:
./drivers/phy/ti/phy-j721e-wiz.c:786:1-23: WARNING: Function
"for_each_child_of_node" should have of_node_put() before return around
line 795.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/1614244674-66556-1-git-send-email-yang.lee@linux.alibaba.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
cmn_refclk_<p/m> lines in Torrent SERDES is used for connecting external
reference clock. cmn_refclk_<p/m> can also be configured to output the
reference clock. In order to drive the refclk out from the SERDES
(Cadence Torrent), PHY_EN_REFCLK should be set in SERDES_RST of WIZ.
Model PHY_EN_REFCLK as a clock, so that platforms like AM642 EVM can
enable it.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20210310120840.16447-6-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
commit 091876cc355d ("phy: ti: j721e-wiz: Add support for WIZ module
present in TI J721E SoC") modeled the internal clocks depending on the
subnodes that are populated in device tree. However recent discussions
in the mailing list [1] suggested to just add #clock cells in the parent
DT node and model the clocks within the driver.
Model the mux clocks without device tree input for AM64x SoC. Don't
remove the earlier design since DT nodes for J7200 and J721e are already
upstreamed.
[1] -> http://lore.kernel.org/r/20210108025943.GA1790601@robh.at.kernel.org
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20210310120840.16447-5-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The frequency of the txmclk between PCIe and SERDES has
changed to 250MHz from 500MHz. Configure full rate divider
for AM64 accordingly.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20210310120840.16447-4-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
commit 091876cc355d ("phy: ti: j721e-wiz: Add support for WIZ module
present in TI J721E SoC") modeled both MUX clocks and DIVIDER clocks in
wiz. However during cleanup, it removed only the MUX clock provider.
Remove the DIVIDER clock provider here.
Fixes: 091876cc355d ("phy: ti: j721e-wiz: Add support for WIZ module present in TI J721E SoC")
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20210310120840.16447-3-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Both "struct wiz_clk_div_sel" and "struct wiz_clk_mux_sel" are static
data that is common for all wiz instances. Including
"struct regmap_field" for each of the wiz instances can yield undesirable
results. Move "struct regmap_field" out of "struct wiz_clk_div_sel" and
"struct wiz_clk_mux_sel" and make them point to constant data.
So far no issues are observed since both these structures are not
accessed outside the probe.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20210310120840.16447-2-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Fix OF node leaks by calling of_node_put in
for_each_child_of_node when the cycle returns.
Generated by: scripts/coccinelle/iterators/for_each_child.cocci
Signed-off-by: Junlin Yang <yangjunlin@yulong.com>
Link: https://lore.kernel.org/r/20210216082739.1414-1-angkery@163.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
clk_div_table and wiz_regmap_config are not modified and can therefore
be made const to allow the compiler to put them in read-only memory.
Before:
text data bss dec hex filename
20265 7044 64 27373 6aed drivers/phy/ti/phy-j721e-wiz.o
After:
text data bss dec hex filename
20649 6660 64 27373 6aed drivers/phy/ti/phy-j721e-wiz.o
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20200524095516.25227-3-rikard.falkeborn@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Fix to return negative error code from some error handling
cases instead of 0, as done elsewhere in this function.
Fixes: 091876cc355d ("phy: ti: j721e-wiz: Add support for WIZ module present in TI J721E SoC")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Roger Quadros <rogerq@ti.com>
Link: https://lore.kernel.org/r/20200507054109.110849-1-weiyongjun1@huawei.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
For DisplayPort use we need to set WIZ_CONFIG_LANECTL register's
P_STANDARD_MODE bits to "mode 3". In the DisplayPort use also the
P_ENABLE bits of the same register are set to P_ENABLE instead of
P_ENABLE_FORCE, so that the DisplayPort driver can enable and disable
the lane as needed. The DisplayPort mode is selected according to
"cdns,phy-type"-properties found in link subnodes under the managed
serdes (see "ti,sierra-phy-t0" and "ti,j721e-serdes-10g" devicetree
bindings for details). All other values of "cdns,phy-type"-property
but PHY_TYPE_DP will set P_STANDARD_MODE bits to 0 and P_ENABLE bits
to force enable.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
In case of error, the function devm_ioremap() returns NULL pointer not
ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.
Fixes: 091876cc355d ("phy: ti: j721e-wiz: Add support for WIZ module present in TI J721E SoC")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Based on this GPIO state we need to configure LN10
bit to swap lane0 and lane1 if required (flipped connector).
Type-C companions typically need some time after the cable is
plugged before and before they reflect the correct status of
Type-C plug orientation on the DIR line.
Type-C Spec specifies CC attachment debounce time (tCCDebounce)
of 100 ms (min) to 200 ms (max).
Use the DT property to figure out if we need to add delay
or not before sampling the Type-C DIR line.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Reviewed-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Add support for WIZ module present in TI's J721E SoC. WIZ is a SERDES
wrapper used to configure some of the input signals to the SERDES. It is
used with both Sierra(16G) and Torrent(10G) SERDES. This driver configures
three clock selects (pll0, pll1, dig), two divider clocks and supports
resets for each of the lanes.
[jsarha@ti.com: Add support for Torrent(10G) SERDES wrapper]
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
