Re: [PATCHv2 15/15] clk: ti: convert to use proper register definition for all accesses

[Adam Ford <aford173@gmail.com>]

On Sat, Mar 11, 2017 at 6:50 AM, Tero Kristo <t-kristo@ti.com> wrote:
> Currently, TI clock driver uses an encapsulated struct that is cast into
> a void pointer to store all register addresses. This can be considered
> as rather nasty hackery, and prevents from expanding the register
> address field also. Instead, replace all the code to use proper struct
> in place for this, which contains all the previously used data.
>
> This patch is rather large as it is touching multiple files, but this
> can't be split up as we need to avoid any boot breakage.
>

I know it's late coming, but according to git bisect, this patch is
causing some problems with Logic PD Torpedo 37xx Dev kit.

It it is a DM3730 that has a WL1283 chipset attached to the SDIO
interface on MMC3.  The driver seems to load properly, but when
loading wpa_supplicant to activate the WL1283, we get a giant crash.
I checked kernel revisions starting at 4.14 and working back to when
it worked, then used git bisect from there.

I am hoping it might be a simple fix for something that just needs to
get added or tweaked in the device tree.



# wpa_supplicant -Dnl80211 -iwlan0 -c/etc/wpa_supplicant.conf -B
Successfully initialized wpa_supplicant
rfkill: Cannot open RFKILL control device
[   14.674011] Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa
0ad014
[   14.682708] pgd = cc2ac000
[   14.685607] [fa0ad014] *pgd=48011452(bad)
[   14.689941] Internal error: : 1028 [#1] SMP ARM
[   14.694732] Modules linked in: arc4 wl12xx wlcore mac80211 cfg80211 evdev joy
dev snd_soc_omap_twl4030 omapfb cfbfillrect cfbimgblt leds_gpio cpufreq_dt cfbco
pyarea led_class thermal_sys panel_dpi pwm_omap_dmtimer gpio_keys hwmon pwm_bl o
map3_isp videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_core v4l
2_common snd_soc_omap_mcbsp snd_soc_omap omap_wdt videodev media omap_hdq wlcore
_sdio wire cn phy_twl4030_usb omap2430 musb_hdrc udc_core twl4030_wdt rtc_twl sn
d_soc_twl4030 ehci_omap snd_soc_core snd_pcm_dmaengine snd_pcm ehci_hcd snd_time
r twl4030_pwrbutton ohci_omap3 twl4030_charger pwm_twl_led snd twl4030_keypad so
undcore pwm_twl industrialio matrix_keymap ohci_hcd usbcore usb_common at24 tsc2
004 omap_ssi tsc200x_core nvmem_core hsi omapdss
[   14.766357] CPU: 0 PID: 174 Comm: wpa_supplicant Not tainted 4.11.0-rc1-00015
-g6c0afb5 #1
[   14.774993] Hardware name: Generic OMAP36xx (Flattened Device Tree)
[   14.781646] task: cc8a8000 task.stack: cc8bc000
[   14.786468] PC is at _wait_softreset_complete+0x70/0x114
[   14.792083] LR is at _enable_sysc+0x30/0x238
[   14.796630] pc : [<c011fe00>]    lr : [<c0120ce0>]    psr: 40010093
[   14.796630] sp : cc8bdbd0  ip : c01288fc  fp : 00000000
[   14.808715] r10: cc8bc000  r9 : c0b0225c  r8 : 00002710
[   14.814239] r7 : 000346dc  r6 : c0d20644  r5 : c0d202ac  r4 : 00000000
[   14.821136] r3 : fa0ad014  r2 : fa0ad000  r1 : 00000000  r0 : c0d202ac
[   14.828033] Flags: nZcv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment non
e
[   14.835662] Control: 10c5387d  Table: 8c2ac019  DAC: 00000051
[   14.841735] Process wpa_supplicant (pid: 174, stack limit = 0xcc8bc218)

[snip what appears to be just memory dump or a bunch of numbers]


[   15.147277] [<c011fe00>] (_wait_softreset_complete) from [<c0120ce0>] (_enabl
e_sysc+0x30/0x238)
[   15.156463] [<c0120ce0>] (_enable_sysc) from [<c012101c>] (_enable+0x134/0x25
8)
[   15.164215] [<c012101c>] (_enable) from [<c012172c>] (omap_hwmod_enable+0x28/
0x48)
[   15.172210] [<c012172c>] (omap_hwmod_enable) from [<c0122700>] (omap_device_e
nable+0x3c/0x90)
[   15.181213] [<c0122700>] (omap_device_enable) from [<c0122764>] (_od_runtime_
resume+0x10/0x38)
[   15.190338] [<c0122764>] (_od_runtime_resume) from [<c057fd24>] (__rpm_callba
ck+0xc0/0x214)
[   15.199157] [<c057fd24>] (__rpm_callback) from [<c057fec8>] (rpm_callback+0x5
0/0x80)
[   15.207366] [<c057fec8>] (rpm_callback) from [<c057f980>] (rpm_resume+0x4b8/0
x738)
[   15.215362] [<c057f980>] (rpm_resume) from [<c057fc4c>] (__pm_runtime_resume+
0x4c/0x64)
[   15.223846] [<c057fc4c>] (__pm_runtime_resume) from [<c065f538>] (__mmc_claim
_host+0x174/0x1b8)
[   15.233062] [<c065f538>] (__mmc_claim_host) from [<bf2ce1e8>] (wl12xx_sdio_ra
w_write+0x34/0x130 [wlcore_sdio])
[   15.243927] [<bf2ce1e8>] (wl12xx_sdio_raw_write [wlcore_sdio]) from [<bf604db
0>] (wlcore_set_partition+0xc4/0x4b0 [wlcore])
[   15.256042] [<bf604db0>] (wlcore_set_partition [wlcore]) from [<bf5fb840>] (w
l12xx_set_power_on+0x80/0x144 [wlcore])
[   15.267517] [<bf5fb840>] (wl12xx_set_power_on [wlcore]) from [<bf5fed6c>] (wl
1271_op_add_interface+0x6ac/0x9c0 [wlcore])
[   15.280303] [<bf5fed6c>] (wl1271_op_add_interface [wlcore]) from [<bf518cd0>]
 (drv_add_interface+0x80/0x31c [mac80211])
[   15.293121] [<bf518cd0>] (drv_add_interface [mac80211]) from [<bf537690>] (ie
ee80211_do_open+0x474/0x8d4 [mac80211])
[   15.304931] [<bf537690>] (ieee80211_do_open [mac80211]) from [<c06b8124>] (__
dev_open+0xa8/0x110)
[   15.314300] [<c06b8124>] (__dev_open) from [<c06b83a8>] (__dev_change_flags+0
x88/0x14c)
[   15.322784] [<c06b83a8>] (__dev_change_flags) from [<c06b8484>] (dev_change_f
lags+0x18/0x48)
[   15.331695] [<c06b8484>] (dev_change_flags) from [<c07334f4>] (devinet_ioctl+
0x720/0x824)
[   15.340362] [<c07334f4>] (devinet_ioctl) from [<c0692d24>] (sock_ioctl+0x160/
0x318)
[   15.348449] [<c0692d24>] (sock_ioctl) from [<c02c7d8c>] (do_vfs_ioctl+0x90/0x
a10)
[   15.356384] [<c02c7d8c>] (do_vfs_ioctl) from [<c02c8778>] (SyS_ioctl+0x6c/0x7
c)
[   15.364105] [<c02c8778>] (SyS_ioctl) from [<c0107840>] (ret_fast_syscall+0x0/
0x1c)
[   15.372131] Code: e3120c01 e595205c e6f23073 1affffef (e5933000)
[   15.378601] ---[ end trace 6966c05397661217 ]---
[   15.383544] In-band Error seen by MPU  at address 0

[snip]


There is much more data to dump after this, but I don't want to dump a
bunch of noise if it isn't helpful.

> Signed-off-by: Tero Kristo <t-kristo@ti.com>
> Acked-by: Tony Lindgren <tony@atomide.com>
> ---
>  arch/arm/mach-omap2/clkt2xxx_dpllcore.c |  3 +-
>  arch/arm/mach-omap2/clock.c             |  2 +-
>  arch/arm/mach-omap2/clock.h             |  2 ++
>  arch/arm/mach-omap2/cm.h                |  5 +--
>  arch/arm/mach-omap2/cm2xxx.c            |  9 ++---
>  arch/arm/mach-omap2/cm3xxx.c            | 10 ++----
>  arch/arm/mach-omap2/cm_common.c         |  2 +-
>  drivers/clk/ti/apll.c                   | 47 ++++++++++++-------------
>  drivers/clk/ti/autoidle.c               | 18 +++++-----
>  drivers/clk/ti/clk-3xxx.c               | 55 +++++++++++++++--------------
>  drivers/clk/ti/clk.c                    | 47 ++++++++++++-------------
>  drivers/clk/ti/clkt_dflt.c              | 61 ++++++++++++---------------------
>  drivers/clk/ti/clkt_dpll.c              |  6 ++--
>  drivers/clk/ti/clkt_iclk.c              | 29 ++++++++--------
>  drivers/clk/ti/clock.h                  | 11 +++---
>  drivers/clk/ti/clockdomain.c            |  8 -----
>  drivers/clk/ti/divider.c                | 24 +++++++------
>  drivers/clk/ti/dpll.c                   | 48 ++++++++++----------------
>  drivers/clk/ti/dpll3xxx.c               | 38 ++++++++++----------
>  drivers/clk/ti/dpll44xx.c               | 14 ++++----
>  drivers/clk/ti/gate.c                   | 32 ++++++++---------
>  drivers/clk/ti/interface.c              | 22 ++++++------
>  drivers/clk/ti/mux.c                    | 41 +++++++++-------------
>  include/linux/clk/ti.h                  | 46 +++++++++++++------------
>  24 files changed, 264 insertions(+), 316 deletions(-)
>

[ snip]


> +                                      s16 *prcm_inst, u8 *idlest_reg_id);
>  };
>
>  #define to_clk_hw_omap(_hw) container_of(_hw, struct clk_hw_omap, hw)
> --
> 1.9.1
>
> --
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