| Message ID | 20180723175302.22535-1-krzk@kernel.org |
|---|---|
| Headers | show |
| Series | pinctrl: samsung: Remove ugly hack for sharing eint_wakeup_mask | expand |
Hi Krzysztof, On 2018-07-23 19:52, Krzysztof Kozlowski wrote: > Hi All, > > Changes since v1 > ================ > 1. Add Tomasz's ack. > 2. Reword description in patch 6/10. > > > Tests > ===== > This is both request for comments and requests for tests. Only basic > tests were done, including suspend to RAM on Odroid U3 (Exynos4412) > with max7768 RTC wakeup. Please kindly test it with devices capable of > suspending and resuming. I am mostly thinking about S5Pv210-based (Aria), > Trats, Trats2 and TM2 (Exynos5433). Existing platforms should not be > broken however changing external interrupt wakeup mask was not done > on Exynos5433. Works fine on Exynos5433 TM2 with some additional patches related to suspend/resume handling of the PMU. It handles only EINT0..EINT31 pins for now. Exynos5433 has more external interrupt wakeup lines: EINT32-63 located at banks GPF1[0..7], GPF2[0..3], GPF3[0..3], GPF4[0..7] and GPF5[0..7]. They can be configured as wakeup sources in EXYNOS5433_EINT_WAKEUP_MASK1 (0x062C) PMU register. Handling of them can be added later when it will be really needed. Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> > Description > =========== > The Exynos/S5Pv210 machine suspend code needs to write the external > interrupt mask during suspend. The mask is controlled by pin controller > driver: the exynos_wkup_irq_set_wake() in IRQ chip for these wakeup > interrupts. > > Therefore pinctrl driver code exposed an exynos_get_eint_wake_mask() > function which was later used as an extern in machine code. > > This is quite ugly way of combining driver and machine code, > not portable triggering Sparse and GCC warnings. > > > This might break suspend capability S5Pv210 on with older DTBs (thus > breaks DTB compatibility), however: > 1. just "might" because in case of using older DTB, the wakeup mask > will not be changed during suspend and default reset value (all > interrupts non-masked) should work, > 2. mainline support for S5Pv210 with DTB is limited and suspend > to RAM already might be broken. > > > Dependencies > ============ > 1. The first seven patches should be taken through one tree, > preferably samsung-pinctrl, > 2. The DTS patch (7/10) for S5Pv210 should go into next cycle, > 3. The remaining patches (8-10) should go after all previous, > so probably another release cycle. > > > Best regards, > Krzysztof > > Krzysztof Kozlowski (10): > pinctrl: samsung: Define suspend and resume callbacks for all banks > and SoCs > pinctrl: samsung: Document suspend and resume members > pinctrl: samsung: Document hidden requirement about one external > wakeup > pinctrl: samsung: Add dedicated compatible for S5Pv210 wakeup > interrupts > ARM: exynos: Define EINT_WAKEUP_MASK registers for S5Pv210 and > Exynos5433 > pinctrl: samsung: Write external wakeup interrupt mask > ARM: dts: s5pv210: Switch to S5Pv210 specific pinctrl wakeup > compatible > ARM: s5pv210: Remove legacy setting of external wakeup interrupts > ARM: exynos: Remove legacy setting of external wakeup interrupts > pinctrl: samsung: Remove legacy API for handling external wakeup > interrupts mask > > .../bindings/pinctrl/samsung-pinctrl.txt | 11 ++- > arch/arm/boot/dts/s5pv210.dtsi | 2 +- > arch/arm/mach-exynos/common.h | 2 - > arch/arm/mach-exynos/suspend.c | 16 +++-- > arch/arm/mach-s5pv210/common.h | 1 - > arch/arm/mach-s5pv210/pm.c | 16 +++-- > drivers/pinctrl/samsung/pinctrl-exynos-arm.c | 16 +++++ > drivers/pinctrl/samsung/pinctrl-exynos.c | 78 +++++++++++++++++++--- > drivers/pinctrl/samsung/pinctrl-samsung.h | 11 +++ > include/linux/soc/samsung/exynos-regs-pmu.h | 8 ++- > 10 files changed, 136 insertions(+), 25 deletions(-) > Best regards
On Tue, Jul 24, 2018 at 11:18:13AM +0200, Marek Szyprowski wrote: > Hi Krzysztof, > > On 2018-07-23 19:52, Krzysztof Kozlowski wrote: > > Hi All, > > > > Changes since v1 > > ================ > > 1. Add Tomasz's ack. > > 2. Reword description in patch 6/10. > > > > > > Tests > > ===== > > This is both request for comments and requests for tests. Only basic > > tests were done, including suspend to RAM on Odroid U3 (Exynos4412) > > with max7768 RTC wakeup. Please kindly test it with devices capable of > > suspending and resuming. I am mostly thinking about S5Pv210-based (Aria), > > Trats, Trats2 and TM2 (Exynos5433). Existing platforms should not be > > broken however changing external interrupt wakeup mask was not done > > on Exynos5433. > > Works fine on Exynos5433 TM2 with some additional patches related to > suspend/resume handling of the PMU. It handles only EINT0..EINT31 pins > for now. Exynos5433 has more external interrupt wakeup lines: EINT32-63 > located at banks GPF1[0..7], GPF2[0..3], GPF3[0..3], GPF4[0..7] and > GPF5[0..7]. They can be configured as wakeup sources in > EXYNOS5433_EINT_WAKEUP_MASK1 (0x062C) PMU register. Handling of them > can be added later when it will be really needed. > > Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Thanks for comments and testing. Indeed support for Exynos5433 has to be improved. I would like to push 1-6 (which are needed for the rest) through current cycle so I applied them to samsung-pinctrl tree. Since anyway suspend to RAM is mostly broken nowadays... nothing more should pop up. Best regards, Krzysztof -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi All, Changes since v1 ================ 1. Add Tomasz's ack. 2. Reword description in patch 6/10. Tests ===== This is both request for comments and requests for tests. Only basic tests were done, including suspend to RAM on Odroid U3 (Exynos4412) with max7768 RTC wakeup. Please kindly test it with devices capable of suspending and resuming. I am mostly thinking about S5Pv210-based (Aria), Trats, Trats2 and TM2 (Exynos5433). Existing platforms should not be broken however changing external interrupt wakeup mask was not done on Exynos5433. Description =========== The Exynos/S5Pv210 machine suspend code needs to write the external interrupt mask during suspend. The mask is controlled by pin controller driver: the exynos_wkup_irq_set_wake() in IRQ chip for these wakeup interrupts. Therefore pinctrl driver code exposed an exynos_get_eint_wake_mask() function which was later used as an extern in machine code. This is quite ugly way of combining driver and machine code, not portable triggering Sparse and GCC warnings. This might break suspend capability S5Pv210 on with older DTBs (thus breaks DTB compatibility), however: 1. just "might" because in case of using older DTB, the wakeup mask will not be changed during suspend and default reset value (all interrupts non-masked) should work, 2. mainline support for S5Pv210 with DTB is limited and suspend to RAM already might be broken. Dependencies ============ 1. The first seven patches should be taken through one tree, preferably samsung-pinctrl, 2. The DTS patch (7/10) for S5Pv210 should go into next cycle, 3. The remaining patches (8-10) should go after all previous, so probably another release cycle. Best regards, Krzysztof Krzysztof Kozlowski (10): pinctrl: samsung: Define suspend and resume callbacks for all banks and SoCs pinctrl: samsung: Document suspend and resume members pinctrl: samsung: Document hidden requirement about one external wakeup pinctrl: samsung: Add dedicated compatible for S5Pv210 wakeup interrupts ARM: exynos: Define EINT_WAKEUP_MASK registers for S5Pv210 and Exynos5433 pinctrl: samsung: Write external wakeup interrupt mask ARM: dts: s5pv210: Switch to S5Pv210 specific pinctrl wakeup compatible ARM: s5pv210: Remove legacy setting of external wakeup interrupts ARM: exynos: Remove legacy setting of external wakeup interrupts pinctrl: samsung: Remove legacy API for handling external wakeup interrupts mask .../bindings/pinctrl/samsung-pinctrl.txt | 11 ++- arch/arm/boot/dts/s5pv210.dtsi | 2 +- arch/arm/mach-exynos/common.h | 2 - arch/arm/mach-exynos/suspend.c | 16 +++-- arch/arm/mach-s5pv210/common.h | 1 - arch/arm/mach-s5pv210/pm.c | 16 +++-- drivers/pinctrl/samsung/pinctrl-exynos-arm.c | 16 +++++ drivers/pinctrl/samsung/pinctrl-exynos.c | 78 +++++++++++++++++++--- drivers/pinctrl/samsung/pinctrl-samsung.h | 11 +++ include/linux/soc/samsung/exynos-regs-pmu.h | 8 ++- 10 files changed, 136 insertions(+), 25 deletions(-)