Re: [PATCH v5 1/3] pinctrl: meson: add a new callback for SoCs fixup

From: Qianggui Song
Date: Mon Nov 11 2019 - 01:44:23 EST

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In reply to: Neil Armstrong: "Re: [PATCH v5 1/3] pinctrl: meson: add a new callback for SoCs fixup"
Next in thread: Qianggui Song: "[PATCH v5 2/3] pinctrl: meson: add pinctrl driver support for Meson-A1 SoC"
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On 2019/11/8 20:50, Neil Armstrong wrote:
> Hi,
>
> On 08/11/2019 10:00, Qianggui Song wrote:
>> In meson_pinctrl_parse_dt, it contains two parts: reg parsing and
>> SoC relative fixup for AO. Several fixups in the same code make it hard
>> to maintain, so move all fixups to each SoC's callback and make
>> meson_pinctrl_parse_dt just do the reg parsing, separate these two
>> parts.Overview of all current Meson SoCs fixup is as below:
>>
>> +------+--------------------------------------+--------------------------+
>> | | | |
>> | SoC | EE domain | AO domain |
>> +------+--------------------------------------+--------------------------+
>> |m8 | parse regs: | parse regs: |
>> |m8b | gpio,mux,pull,pull-enable(skip ds) | gpio,mux,pull(skip ds)|
>> |gxl | fixup: | fixup: |
>> |gxbb | no | pull-enable = pull; |
>> |axg | | |
>> +------+--------------------------------------+--------------------------+
>> |g12a | parse regs: | parse regs: |
>> |sm1 | gpio,mux,pull,pull-enable,ds | gpio,mux,ds |
>> | | fixup: | fixup: |
>> | | no | pull = gpio; |
>> | | | pull-enable = gpio; |
>> +------+--------------------------------------+--------------------------+
>> |a1 or | parse regs: |
>> |later | gpio/mux (without ao domain) |
>> |SoCs | fixup: |
>> | | pull = gpio; pull-enable = gpio; ds = gpio; |
>> +------+-----------------------------------------------------------------+
>> Since m8-axg share the same ao fixup, make a common function
>> meson8_aobus_parse_dt_extra to do the job.
>>
>> Signed-off-by: Qianggui Song <qianggui.song@xxxxxxxxxxx>
>> ---
>> drivers/pinctrl/meson/pinctrl-meson-axg.c | 1 +
>> drivers/pinctrl/meson/pinctrl-meson-g12a.c | 9 +++++++++
>> drivers/pinctrl/meson/pinctrl-meson-gxbb.c | 1 +
>> drivers/pinctrl/meson/pinctrl-meson-gxl.c | 1 +
>> drivers/pinctrl/meson/pinctrl-meson.c | 25 ++++++++++++++++++-------
>> drivers/pinctrl/meson/pinctrl-meson.h | 5 +++++
>> drivers/pinctrl/meson/pinctrl-meson8.c | 1 +
>> drivers/pinctrl/meson/pinctrl-meson8b.c | 1 +
>> 8 files changed, 37 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/pinctrl/meson/pinctrl-meson-axg.c b/drivers/pinctrl/meson/pinctrl-meson-axg.c
>> index ad502eda4afa..072765db93d7 100644
>> --- a/drivers/pinctrl/meson/pinctrl-meson-axg.c
>> +++ b/drivers/pinctrl/meson/pinctrl-meson-axg.c
>> @@ -1066,6 +1066,7 @@
>> .num_banks = ARRAY_SIZE(meson_axg_aobus_banks),
>> .pmx_ops = &meson_axg_pmx_ops,
>> .pmx_data = &meson_axg_aobus_pmx_banks_data,
>> + .parse_dt = meson8_aobus_parse_dt_extra,
>> };
>>
>> static const struct of_device_id meson_axg_pinctrl_dt_match[] = {
>> diff --git a/drivers/pinctrl/meson/pinctrl-meson-g12a.c b/drivers/pinctrl/meson/pinctrl-meson-g12a.c
>> index 582665fd362a..41850e3c0091 100644
>> --- a/drivers/pinctrl/meson/pinctrl-meson-g12a.c
>> +++ b/drivers/pinctrl/meson/pinctrl-meson-g12a.c
>> @@ -1362,6 +1362,14 @@
>> .num_pmx_banks = ARRAY_SIZE(meson_g12a_aobus_pmx_banks),
>> };
>>
>> +static int meson_g12a_aobus_parse_dt_extra(struct meson_pinctrl *pc)
>> +{
>> + pc->reg_pull = pc->reg_gpio;
>> + pc->reg_pullen = pc->reg_gpio;
>> +
>> + return 0;
>> +}
>> +
>> static struct meson_pinctrl_data meson_g12a_periphs_pinctrl_data = {
>> .name = "periphs-banks",
>> .pins = meson_g12a_periphs_pins,
>> @@ -1388,6 +1396,7 @@
>> .num_banks = ARRAY_SIZE(meson_g12a_aobus_banks),
>> .pmx_ops = &meson_axg_pmx_ops,
>> .pmx_data = &meson_g12a_aobus_pmx_banks_data,
>> + .parse_dt = meson_g12a_aobus_parse_dt_extra,
>> };
>>
>> static const struct of_device_id meson_g12a_pinctrl_dt_match[] = {
>> diff --git a/drivers/pinctrl/meson/pinctrl-meson-gxbb.c b/drivers/pinctrl/meson/pinctrl-meson-gxbb.c
>> index 5bfa56f3847e..926b9997159a 100644
>> --- a/drivers/pinctrl/meson/pinctrl-meson-gxbb.c
>> +++ b/drivers/pinctrl/meson/pinctrl-meson-gxbb.c
>> @@ -851,6 +851,7 @@
>> .num_funcs = ARRAY_SIZE(meson_gxbb_aobus_functions),
>> .num_banks = ARRAY_SIZE(meson_gxbb_aobus_banks),
>> .pmx_ops = &meson8_pmx_ops,
>> + .parse_dt = meson8_aobus_parse_dt_extra,
>> };
>>
>> static const struct of_device_id meson_gxbb_pinctrl_dt_match[] = {
>> diff --git a/drivers/pinctrl/meson/pinctrl-meson-gxl.c b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
>> index 72c5373c8dc1..8b1a49f5da43 100644
>> --- a/drivers/pinctrl/meson/pinctrl-meson-gxl.c
>> +++ b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
>> @@ -820,6 +820,7 @@
>> .num_funcs = ARRAY_SIZE(meson_gxl_aobus_functions),
>> .num_banks = ARRAY_SIZE(meson_gxl_aobus_banks),
>> .pmx_ops = &meson8_pmx_ops,
>> + .parse_dt = meson8_aobus_parse_dt_extra,
>> };
>>
>> static const struct of_device_id meson_gxl_pinctrl_dt_match[] = {
>> diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c
>> index 8bba9d053d9f..a812c6d986d9 100644
>> --- a/drivers/pinctrl/meson/pinctrl-meson.c
>> +++ b/drivers/pinctrl/meson/pinctrl-meson.c
>> @@ -625,7 +625,7 @@ static struct regmap *meson_map_resource(struct meson_pinctrl *pc,
>>
>> i = of_property_match_string(node, "reg-names", name);
>> if (of_address_to_resource(node, i, &res))
>> - return ERR_PTR(-ENOENT);
>> + return NULL;
>>
>> base = devm_ioremap_resource(pc->dev, &res);
>> if (IS_ERR(base))
>> @@ -665,26 +665,24 @@ static int meson_pinctrl_parse_dt(struct meson_pinctrl *pc,
>> pc->of_node = gpio_np;
>>
>> pc->reg_mux = meson_map_resource(pc, gpio_np, "mux");
>> - if (IS_ERR(pc->reg_mux)) {
>> + if (IS_ERR_OR_NULL(pc->reg_mux)) {
>> dev_err(pc->dev, "mux registers not found\n");
>> return PTR_ERR(pc->reg_mux);
>
> If pc->reg_mux is NULL, it will return "0" here, which is wrong.
>
> Either keep the return ERR_PTR(-ENOENT); in meson_map_resource, or
> return pc->reg_mux ? -ENOENT : PTR_ERR(pc->reg_mux);
>
Thanks. ERR_PTR(-ENOENT) to NULL make below region easy to handle, I
will change to "return pc->reg_mux ? -ENOENT : PTR_ERR(pc->reg_mux);"

>> }
>>
>> pc->reg_gpio = meson_map_resource(pc, gpio_np, "gpio");
>> - if (IS_ERR(pc->reg_gpio)) {
>> + if (IS_ERR_OR_NULL(pc->reg_gpio)) {
>> dev_err(pc->dev, "gpio registers not found\n");
>> return PTR_ERR(pc->reg_gpio);
>
> Ditto
will do as above.
>
>> }
>>
>> pc->reg_pull = meson_map_resource(pc, gpio_np, "pull");
>> - /* Use gpio region if pull one is not present */
>> if (IS_ERR(pc->reg_pull))
>> - pc->reg_pull = pc->reg_gpio;
>> + pc->reg_pull = NULL;
>>
>> pc->reg_pullen = meson_map_resource(pc, gpio_np, "pull-enable");
>> - /* Use pull region if pull-enable one is not present */
>> if (IS_ERR(pc->reg_pullen))
>> - pc->reg_pullen = pc->reg_pull;
>> + pc->reg_pullen = NULL;
>>
>> pc->reg_ds = meson_map_resource(pc, gpio_np, "ds");
>> if (IS_ERR(pc->reg_ds)) {
>> @@ -692,6 +690,19 @@ static int meson_pinctrl_parse_dt(struct meson_pinctrl *pc,
>> pc->reg_ds = NULL;
>> }
>>
>> + if (pc->data->parse_dt)
>> + return pc->data->parse_dt(pc);
>> +
>> + return 0;
>> +}
>> +
>> +int meson8_aobus_parse_dt_extra(struct meson_pinctrl *pc)
>> +{
>> + if (!pc->reg_pull)
>> + return -EINVAL;
>> +
>> + pc->reg_pullen = pc->reg_pull;
>> +
>> return 0;
>> }
>>
>> diff --git a/drivers/pinctrl/meson/pinctrl-meson.h b/drivers/pinctrl/meson/pinctrl-meson.h
>> index c696f3241a36..bfa1d3599333 100644
>> --- a/drivers/pinctrl/meson/pinctrl-meson.h
>> +++ b/drivers/pinctrl/meson/pinctrl-meson.h
>> @@ -11,6 +11,8 @@
>> #include <linux/regmap.h>
>> #include <linux/types.h>
>>
>> +struct meson_pinctrl;
>> +
>> /**
>> * struct meson_pmx_group - a pinmux group
>> *
>> @@ -114,6 +116,7 @@ struct meson_pinctrl_data {
>> unsigned int num_banks;
>> const struct pinmux_ops *pmx_ops;
>> void *pmx_data;
>> + int (*parse_dt)(struct meson_pinctrl *pc);
>> };
>>
>> struct meson_pinctrl {
>> @@ -171,3 +174,5 @@ int meson_pmx_get_groups(struct pinctrl_dev *pcdev,
>>
>> /* Common probe function */
>> int meson_pinctrl_probe(struct platform_device *pdev);
>> +/* Common ao groups extra dt parse function for SoCs before g12a */
>> +int meson8_aobus_parse_dt_extra(struct meson_pinctrl *pc);
>> diff --git a/drivers/pinctrl/meson/pinctrl-meson8.c b/drivers/pinctrl/meson/pinctrl-meson8.c
>> index 0b97befa6335..dd17100efdcf 100644
>> --- a/drivers/pinctrl/meson/pinctrl-meson8.c
>> +++ b/drivers/pinctrl/meson/pinctrl-meson8.c
>> @@ -1103,6 +1103,7 @@
>> .num_funcs = ARRAY_SIZE(meson8_aobus_functions),
>> .num_banks = ARRAY_SIZE(meson8_aobus_banks),
>> .pmx_ops = &meson8_pmx_ops,
>> + .parse_dt = &meson8_aobus_parse_dt_extra,
>> };
>>
>> static const struct of_device_id meson8_pinctrl_dt_match[] = {
>> diff --git a/drivers/pinctrl/meson/pinctrl-meson8b.c b/drivers/pinctrl/meson/pinctrl-meson8b.c
>> index a7de388388e6..2d5339edd0b7 100644
>> --- a/drivers/pinctrl/meson/pinctrl-meson8b.c
>> +++ b/drivers/pinctrl/meson/pinctrl-meson8b.c
>> @@ -962,6 +962,7 @@
>> .num_funcs = ARRAY_SIZE(meson8b_aobus_functions),
>> .num_banks = ARRAY_SIZE(meson8b_aobus_banks),
>> .pmx_ops = &meson8_pmx_ops,
>> + .parse_dt = &meson8_aobus_parse_dt_extra,
>> };
>>
>> static const struct of_device_id meson8b_pinctrl_dt_match[] = {
>>
>
> .
>

Next message: Sahitya Tummala: "Re: [PATCH] f2fs: Fix deadlock under storage almost full/dirty condition"
Previous message: Greg Kroah-Hartman: "Re: [PATCH] base: soc: Export soc_device_to_device() helper"
In reply to: Neil Armstrong: "Re: [PATCH v5 1/3] pinctrl: meson: add a new callback for SoCs fixup"
Next in thread: Qianggui Song: "[PATCH v5 2/3] pinctrl: meson: add pinctrl driver support for Meson-A1 SoC"
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