| Message ID | 20190604104455.8877-4-lee.jones@linaro.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [1/8] i2c: i2c-qcom-geni: Provide support for ACPI | expand |
On Tue 04 Jun 03:44 PDT 2019, Lee Jones wrote: > This patch provides basic support for booting with ACPI instead > of the currently supported Device Tree. When doing so there are a > couple of differences which we need to taken into consideration. > > Firstly, the SDM850 ACPI tables omit information pertaining to the > 4 reserved GPIOs on the platform. If Linux attempts to touch/ > initialise any of these lines, the firmware will restart the > platform. > > Secondly, when booting with ACPI, it is expected that the firmware > will set-up things like; Regulators, Clocks, Pin Functions, etc in > their ideal configuration. Thus, the possible Pin Functions > available to this platform are not advertised when providing the > higher GPIOD/Pinctrl APIs with pin information. > > Signed-off-by: Lee Jones <lee.jones@linaro.org> > --- > drivers/pinctrl/qcom/Kconfig | 2 +- > drivers/pinctrl/qcom/pinctrl-sdm845.c | 35 ++++++++++++++++++++++++++- > 2 files changed, 35 insertions(+), 2 deletions(-) > > diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig > index 2e66ab72c10b..aafbe932424f 100644 > --- a/drivers/pinctrl/qcom/Kconfig > +++ b/drivers/pinctrl/qcom/Kconfig > @@ -168,7 +168,7 @@ config PINCTRL_SDM660 > > config PINCTRL_SDM845 > tristate "Qualcomm Technologies Inc SDM845 pin controller driver" > - depends on GPIOLIB && OF > + depends on GPIOLIB && (OF || ACPI) > select PINCTRL_MSM > help > This is the pinctrl, pinmux, pinconf and gpiolib driver for the > diff --git a/drivers/pinctrl/qcom/pinctrl-sdm845.c b/drivers/pinctrl/qcom/pinctrl-sdm845.c > index c97f20fca5fd..7188bee3cf3e 100644 > --- a/drivers/pinctrl/qcom/pinctrl-sdm845.c > +++ b/drivers/pinctrl/qcom/pinctrl-sdm845.c > @@ -3,6 +3,7 @@ > * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. > */ > > +#include <linux/acpi.h> > #include <linux/module.h> > #include <linux/of.h> > #include <linux/platform_device.h> > @@ -1277,6 +1278,10 @@ static const struct msm_pingroup sdm845_groups[] = { > UFS_RESET(ufs_reset, 0x99f000), > }; > > +static const int sdm845_acpi_reserved_gpios[] = { > + 0, 1, 2, 3, 81, 82, 83, 84, -1 > +}; > + > static const struct msm_pinctrl_soc_data sdm845_pinctrl = { > .pins = sdm845_pins, > .npins = ARRAY_SIZE(sdm845_pins), > @@ -1284,14 +1289,41 @@ static const struct msm_pinctrl_soc_data sdm845_pinctrl = { > .nfunctions = ARRAY_SIZE(sdm845_functions), > .groups = sdm845_groups, > .ngroups = ARRAY_SIZE(sdm845_groups), > + .reserved_gpios = sdm845_acpi_reserved_gpios, The reason why put these in DT is because the list is board/firmware dependent. E.g. the firmware on db845c does not support the peripherals that sits on these 8 pins and as such these are not reserved. But given that the two structs looks identical now, did you perhaps not intend to add.reserved_gpios for the non-ACPI case? Regards, Bjorn > + .ngpios = 150, > +}; > + > +static const struct msm_pinctrl_soc_data sdm845_acpi_pinctrl = { > + .pins = sdm845_pins, > + .npins = ARRAY_SIZE(sdm845_pins), > + .groups = sdm845_groups, > + .ngroups = ARRAY_SIZE(sdm845_groups), > + .reserved_gpios = sdm845_acpi_reserved_gpios, > .ngpios = 150, > }; > > static int sdm845_pinctrl_probe(struct platform_device *pdev) > { > - return msm_pinctrl_probe(pdev, &sdm845_pinctrl); > + int ret; > + > + if (pdev->dev.of_node) { > + ret = msm_pinctrl_probe(pdev, &sdm845_pinctrl); > + } else if (ACPI_HANDLE(&pdev->dev)) { > + ret = msm_pinctrl_probe(pdev, &sdm845_acpi_pinctrl); > + } else { > + dev_err(&pdev->dev, "DT and ACPI disabled\n"); > + return -EINVAL; > + } > + > + return ret; > } > > +static const struct acpi_device_id sdm845_pinctrl_acpi_match[] = { > + { "QCOM0217"}, > + { }, > +}; > +MODULE_DEVICE_TABLE(acpi, sdm845_pinctrl_acpi_match); > + > static const struct of_device_id sdm845_pinctrl_of_match[] = { > { .compatible = "qcom,sdm845-pinctrl", }, > { }, > @@ -1302,6 +1334,7 @@ static struct platform_driver sdm845_pinctrl_driver = { > .name = "sdm845-pinctrl", > .pm = &msm_pinctrl_dev_pm_ops, > .of_match_table = sdm845_pinctrl_of_match, > + .acpi_match_table = ACPI_PTR(sdm845_pinctrl_acpi_match), > }, > .probe = sdm845_pinctrl_probe, > .remove = msm_pinctrl_remove, > -- > 2.17.1 >
On Tue, 04 Jun 2019, Bjorn Andersson wrote: > On Tue 04 Jun 03:44 PDT 2019, Lee Jones wrote: > > > This patch provides basic support for booting with ACPI instead > > of the currently supported Device Tree. When doing so there are a > > couple of differences which we need to taken into consideration. > > > > Firstly, the SDM850 ACPI tables omit information pertaining to the > > 4 reserved GPIOs on the platform. If Linux attempts to touch/ > > initialise any of these lines, the firmware will restart the > > platform. > > > > Secondly, when booting with ACPI, it is expected that the firmware > > will set-up things like; Regulators, Clocks, Pin Functions, etc in > > their ideal configuration. Thus, the possible Pin Functions > > available to this platform are not advertised when providing the > > higher GPIOD/Pinctrl APIs with pin information. > > > > Signed-off-by: Lee Jones <lee.jones@linaro.org> > > --- > > drivers/pinctrl/qcom/Kconfig | 2 +- > > drivers/pinctrl/qcom/pinctrl-sdm845.c | 35 ++++++++++++++++++++++++++- > > 2 files changed, 35 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig > > index 2e66ab72c10b..aafbe932424f 100644 > > --- a/drivers/pinctrl/qcom/Kconfig > > +++ b/drivers/pinctrl/qcom/Kconfig > > @@ -168,7 +168,7 @@ config PINCTRL_SDM660 > > > > config PINCTRL_SDM845 > > tristate "Qualcomm Technologies Inc SDM845 pin controller driver" > > - depends on GPIOLIB && OF > > + depends on GPIOLIB && (OF || ACPI) > > select PINCTRL_MSM > > help > > This is the pinctrl, pinmux, pinconf and gpiolib driver for the > > diff --git a/drivers/pinctrl/qcom/pinctrl-sdm845.c b/drivers/pinctrl/qcom/pinctrl-sdm845.c > > index c97f20fca5fd..7188bee3cf3e 100644 > > --- a/drivers/pinctrl/qcom/pinctrl-sdm845.c > > +++ b/drivers/pinctrl/qcom/pinctrl-sdm845.c > > @@ -3,6 +3,7 @@ > > * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. > > */ > > > > +#include <linux/acpi.h> > > #include <linux/module.h> > > #include <linux/of.h> > > #include <linux/platform_device.h> > > @@ -1277,6 +1278,10 @@ static const struct msm_pingroup sdm845_groups[] = { > > UFS_RESET(ufs_reset, 0x99f000), > > }; > > > > +static const int sdm845_acpi_reserved_gpios[] = { > > + 0, 1, 2, 3, 81, 82, 83, 84, -1 > > +}; > > + > > static const struct msm_pinctrl_soc_data sdm845_pinctrl = { > > .pins = sdm845_pins, > > .npins = ARRAY_SIZE(sdm845_pins), > > @@ -1284,14 +1289,41 @@ static const struct msm_pinctrl_soc_data sdm845_pinctrl = { > > .nfunctions = ARRAY_SIZE(sdm845_functions), > > .groups = sdm845_groups, > > .ngroups = ARRAY_SIZE(sdm845_groups), > > + .reserved_gpios = sdm845_acpi_reserved_gpios, > > The reason why put these in DT is because the list is board/firmware > dependent. E.g. the firmware on db845c does not support the peripherals > that sits on these 8 pins and as such these are not reserved. If we need to be more particular about which platform(s) this affects, we could add matching based on their differences (some ACPI HID or F/W version/descriptor, etc) as and when we enable them for booting with ACPI. > But given that the two structs looks identical now, did you perhaps not > intend to add.reserved_gpios for the non-ACPI case? Given your example above, I think it's best that we let the configuration tables advertise these in the first instance. I only add them here because it is not possible to obtain them from elsewhere.
On Wed 05 Jun 00:31 PDT 2019, Lee Jones wrote: > On Tue, 04 Jun 2019, Bjorn Andersson wrote: > > > On Tue 04 Jun 03:44 PDT 2019, Lee Jones wrote: > > > > > This patch provides basic support for booting with ACPI instead > > > of the currently supported Device Tree. When doing so there are a > > > couple of differences which we need to taken into consideration. > > > > > > Firstly, the SDM850 ACPI tables omit information pertaining to the > > > 4 reserved GPIOs on the platform. If Linux attempts to touch/ > > > initialise any of these lines, the firmware will restart the > > > platform. > > > > > > Secondly, when booting with ACPI, it is expected that the firmware > > > will set-up things like; Regulators, Clocks, Pin Functions, etc in > > > their ideal configuration. Thus, the possible Pin Functions > > > available to this platform are not advertised when providing the > > > higher GPIOD/Pinctrl APIs with pin information. > > > > > > Signed-off-by: Lee Jones <lee.jones@linaro.org> > > > --- > > > drivers/pinctrl/qcom/Kconfig | 2 +- > > > drivers/pinctrl/qcom/pinctrl-sdm845.c | 35 ++++++++++++++++++++++++++- > > > 2 files changed, 35 insertions(+), 2 deletions(-) > > > > > > diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig > > > index 2e66ab72c10b..aafbe932424f 100644 > > > --- a/drivers/pinctrl/qcom/Kconfig > > > +++ b/drivers/pinctrl/qcom/Kconfig > > > @@ -168,7 +168,7 @@ config PINCTRL_SDM660 > > > > > > config PINCTRL_SDM845 > > > tristate "Qualcomm Technologies Inc SDM845 pin controller driver" > > > - depends on GPIOLIB && OF > > > + depends on GPIOLIB && (OF || ACPI) > > > select PINCTRL_MSM > > > help > > > This is the pinctrl, pinmux, pinconf and gpiolib driver for the > > > diff --git a/drivers/pinctrl/qcom/pinctrl-sdm845.c b/drivers/pinctrl/qcom/pinctrl-sdm845.c > > > index c97f20fca5fd..7188bee3cf3e 100644 > > > --- a/drivers/pinctrl/qcom/pinctrl-sdm845.c > > > +++ b/drivers/pinctrl/qcom/pinctrl-sdm845.c > > > @@ -3,6 +3,7 @@ > > > * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. > > > */ > > > > > > +#include <linux/acpi.h> > > > #include <linux/module.h> > > > #include <linux/of.h> > > > #include <linux/platform_device.h> > > > @@ -1277,6 +1278,10 @@ static const struct msm_pingroup sdm845_groups[] = { > > > UFS_RESET(ufs_reset, 0x99f000), > > > }; > > > > > > +static const int sdm845_acpi_reserved_gpios[] = { > > > + 0, 1, 2, 3, 81, 82, 83, 84, -1 > > > +}; > > > + > > > static const struct msm_pinctrl_soc_data sdm845_pinctrl = { > > > .pins = sdm845_pins, > > > .npins = ARRAY_SIZE(sdm845_pins), > > > @@ -1284,14 +1289,41 @@ static const struct msm_pinctrl_soc_data sdm845_pinctrl = { > > > .nfunctions = ARRAY_SIZE(sdm845_functions), > > > .groups = sdm845_groups, > > > .ngroups = ARRAY_SIZE(sdm845_groups), > > > + .reserved_gpios = sdm845_acpi_reserved_gpios, > > > > The reason why put these in DT is because the list is board/firmware > > dependent. E.g. the firmware on db845c does not support the peripherals > > that sits on these 8 pins and as such these are not reserved. > > If we need to be more particular about which platform(s) this affects, > we could add matching based on their differences (some ACPI HID or F/W > version/descriptor, etc) as and when we enable them for booting with > ACPI. > You're making an assumption that all SDM845 (the platform) devices using ACPI will have this list of GPIOs reserved for secure firmware to use, this is questionable but I don't have any better suggestion. But you do this by adding a new struct msm_pinctrl_soc_data sdm845_acpi_pinctrl, specifically for the ACPI case. And then, on the line I object to here, you add this list as the list of reserved GPIOs for the DT case as well. > > But given that the two structs looks identical now, did you perhaps not > > intend to add.reserved_gpios for the non-ACPI case? > > Given your example above, I think it's best that we let the > configuration tables advertise these in the first instance. I only > add them here because it is not possible to obtain them from > elsewhere. > Then add it for ACPI only - which I still presume you intended to do by adding sdm845_acpi_pinctrl (which is now identical to sdm845_pinctrl). Regards, Bjorn
On Wed, 05 Jun 2019, Bjorn Andersson wrote: > On Wed 05 Jun 00:31 PDT 2019, Lee Jones wrote: > > > On Tue, 04 Jun 2019, Bjorn Andersson wrote: > > > > > On Tue 04 Jun 03:44 PDT 2019, Lee Jones wrote: > > > > > > > This patch provides basic support for booting with ACPI instead > > > > of the currently supported Device Tree. When doing so there are a > > > > couple of differences which we need to taken into consideration. > > > > > > > > Firstly, the SDM850 ACPI tables omit information pertaining to the > > > > 4 reserved GPIOs on the platform. If Linux attempts to touch/ > > > > initialise any of these lines, the firmware will restart the > > > > platform. > > > > > > > > Secondly, when booting with ACPI, it is expected that the firmware > > > > will set-up things like; Regulators, Clocks, Pin Functions, etc in > > > > their ideal configuration. Thus, the possible Pin Functions > > > > available to this platform are not advertised when providing the > > > > higher GPIOD/Pinctrl APIs with pin information. > > > > > > > > Signed-off-by: Lee Jones <lee.jones@linaro.org> > > > > --- > > > > drivers/pinctrl/qcom/Kconfig | 2 +- > > > > drivers/pinctrl/qcom/pinctrl-sdm845.c | 35 ++++++++++++++++++++++++++- > > > > 2 files changed, 35 insertions(+), 2 deletions(-) > > > > > > > > diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig > > > > index 2e66ab72c10b..aafbe932424f 100644 > > > > --- a/drivers/pinctrl/qcom/Kconfig > > > > +++ b/drivers/pinctrl/qcom/Kconfig > > > > @@ -168,7 +168,7 @@ config PINCTRL_SDM660 > > > > > > > > config PINCTRL_SDM845 > > > > tristate "Qualcomm Technologies Inc SDM845 pin controller driver" > > > > - depends on GPIOLIB && OF > > > > + depends on GPIOLIB && (OF || ACPI) > > > > select PINCTRL_MSM > > > > help > > > > This is the pinctrl, pinmux, pinconf and gpiolib driver for the > > > > diff --git a/drivers/pinctrl/qcom/pinctrl-sdm845.c b/drivers/pinctrl/qcom/pinctrl-sdm845.c > > > > index c97f20fca5fd..7188bee3cf3e 100644 > > > > --- a/drivers/pinctrl/qcom/pinctrl-sdm845.c > > > > +++ b/drivers/pinctrl/qcom/pinctrl-sdm845.c > > > > @@ -3,6 +3,7 @@ > > > > * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. > > > > */ > > > > > > > > +#include <linux/acpi.h> > > > > #include <linux/module.h> > > > > #include <linux/of.h> > > > > #include <linux/platform_device.h> > > > > @@ -1277,6 +1278,10 @@ static const struct msm_pingroup sdm845_groups[] = { > > > > UFS_RESET(ufs_reset, 0x99f000), > > > > }; > > > > > > > > +static const int sdm845_acpi_reserved_gpios[] = { > > > > + 0, 1, 2, 3, 81, 82, 83, 84, -1 > > > > +}; > > > > + > > > > static const struct msm_pinctrl_soc_data sdm845_pinctrl = { > > > > .pins = sdm845_pins, > > > > .npins = ARRAY_SIZE(sdm845_pins), > > > > @@ -1284,14 +1289,41 @@ static const struct msm_pinctrl_soc_data sdm845_pinctrl = { > > > > .nfunctions = ARRAY_SIZE(sdm845_functions), > > > > .groups = sdm845_groups, > > > > .ngroups = ARRAY_SIZE(sdm845_groups), > > > > + .reserved_gpios = sdm845_acpi_reserved_gpios, > > > > > > The reason why put these in DT is because the list is board/firmware > > > dependent. E.g. the firmware on db845c does not support the peripherals > > > that sits on these 8 pins and as such these are not reserved. > > > > If we need to be more particular about which platform(s) this affects, > > we could add matching based on their differences (some ACPI HID or F/W > > version/descriptor, etc) as and when we enable them for booting with > > ACPI. > > > > You're making an assumption that all SDM845 (the platform) devices using > ACPI will have this list of GPIOs reserved for secure firmware to use, > this is questionable but I don't have any better suggestion. Yes, I am, since this is the first and currently only device which ticks those boxes. If/when there are others AND if they require a different configuration, we can look at the differences and conduct some suitable matching on them at the time. > But you do this by adding a new struct msm_pinctrl_soc_data > sdm845_acpi_pinctrl, specifically for the ACPI case. And then, on the > line I object to here, you add this list as the list of reserved GPIOs > for the DT case as well. Ohhhh, now I see what you're getting at. Yes, that's a mistake left over from testing. That needs removing -- good spot. > > > But given that the two structs looks identical now, did you perhaps not > > > intend to add.reserved_gpios for the non-ACPI case? > > > > Given your example above, I think it's best that we let the > > configuration tables advertise these in the first instance. I only > > add them here because it is not possible to obtain them from > > elsewhere. > > > > Then add it for ACPI only - which I still presume you intended to do by > adding sdm845_acpi_pinctrl (which is now identical to sdm845_pinctrl). We're arguing about the same thing - sorry for the confusion. I will fix this.
diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig index 2e66ab72c10b..aafbe932424f 100644 --- a/drivers/pinctrl/qcom/Kconfig +++ b/drivers/pinctrl/qcom/Kconfig @@ -168,7 +168,7 @@ config PINCTRL_SDM660 config PINCTRL_SDM845 tristate "Qualcomm Technologies Inc SDM845 pin controller driver" - depends on GPIOLIB && OF + depends on GPIOLIB && (OF || ACPI) select PINCTRL_MSM help This is the pinctrl, pinmux, pinconf and gpiolib driver for the diff --git a/drivers/pinctrl/qcom/pinctrl-sdm845.c b/drivers/pinctrl/qcom/pinctrl-sdm845.c index c97f20fca5fd..7188bee3cf3e 100644 --- a/drivers/pinctrl/qcom/pinctrl-sdm845.c +++ b/drivers/pinctrl/qcom/pinctrl-sdm845.c @@ -3,6 +3,7 @@ * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. */ +#include <linux/acpi.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> @@ -1277,6 +1278,10 @@ static const struct msm_pingroup sdm845_groups[] = { UFS_RESET(ufs_reset, 0x99f000), }; +static const int sdm845_acpi_reserved_gpios[] = { + 0, 1, 2, 3, 81, 82, 83, 84, -1 +}; + static const struct msm_pinctrl_soc_data sdm845_pinctrl = { .pins = sdm845_pins, .npins = ARRAY_SIZE(sdm845_pins), @@ -1284,14 +1289,41 @@ static const struct msm_pinctrl_soc_data sdm845_pinctrl = { .nfunctions = ARRAY_SIZE(sdm845_functions), .groups = sdm845_groups, .ngroups = ARRAY_SIZE(sdm845_groups), + .reserved_gpios = sdm845_acpi_reserved_gpios, + .ngpios = 150, +}; + +static const struct msm_pinctrl_soc_data sdm845_acpi_pinctrl = { + .pins = sdm845_pins, + .npins = ARRAY_SIZE(sdm845_pins), + .groups = sdm845_groups, + .ngroups = ARRAY_SIZE(sdm845_groups), + .reserved_gpios = sdm845_acpi_reserved_gpios, .ngpios = 150, }; static int sdm845_pinctrl_probe(struct platform_device *pdev) { - return msm_pinctrl_probe(pdev, &sdm845_pinctrl); + int ret; + + if (pdev->dev.of_node) { + ret = msm_pinctrl_probe(pdev, &sdm845_pinctrl); + } else if (ACPI_HANDLE(&pdev->dev)) { + ret = msm_pinctrl_probe(pdev, &sdm845_acpi_pinctrl); + } else { + dev_err(&pdev->dev, "DT and ACPI disabled\n"); + return -EINVAL; + } + + return ret; } +static const struct acpi_device_id sdm845_pinctrl_acpi_match[] = { + { "QCOM0217"}, + { }, +}; +MODULE_DEVICE_TABLE(acpi, sdm845_pinctrl_acpi_match); + static const struct of_device_id sdm845_pinctrl_of_match[] = { { .compatible = "qcom,sdm845-pinctrl", }, { }, @@ -1302,6 +1334,7 @@ static struct platform_driver sdm845_pinctrl_driver = { .name = "sdm845-pinctrl", .pm = &msm_pinctrl_dev_pm_ops, .of_match_table = sdm845_pinctrl_of_match, + .acpi_match_table = ACPI_PTR(sdm845_pinctrl_acpi_match), }, .probe = sdm845_pinctrl_probe, .remove = msm_pinctrl_remove,
This patch provides basic support for booting with ACPI instead of the currently supported Device Tree. When doing so there are a couple of differences which we need to taken into consideration. Firstly, the SDM850 ACPI tables omit information pertaining to the 4 reserved GPIOs on the platform. If Linux attempts to touch/ initialise any of these lines, the firmware will restart the platform. Secondly, when booting with ACPI, it is expected that the firmware will set-up things like; Regulators, Clocks, Pin Functions, etc in their ideal configuration. Thus, the possible Pin Functions available to this platform are not advertised when providing the higher GPIOD/Pinctrl APIs with pin information. Signed-off-by: Lee Jones <lee.jones@linaro.org> --- drivers/pinctrl/qcom/Kconfig | 2 +- drivers/pinctrl/qcom/pinctrl-sdm845.c | 35 ++++++++++++++++++++++++++- 2 files changed, 35 insertions(+), 2 deletions(-)