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Message-ID: <342898d1-59ef-9104-658d-d992c0126361@codeaurora.org>
Date: Wed, 1 Dec 2021 20:03:28 +0530
From: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
To: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
broonie@...nel.org, robh+dt@...nel.org, plai@...eaurora.org,
bgoswami@...eaurora.org, perex@...ex.cz, tiwai@...e.com,
rohitkr@...eaurora.org, linux-arm-msm@...r.kernel.org,
alsa-devel@...a-project.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, swboyd@...omium.org,
judyhsiao@...omium.org, Linus Walleij <linus.walleij@...aro.org>,
linux-gpio@...r.kernel.org
Cc: Venkata Prasad Potturu <potturu@...eaurora.org>
Subject: Re: [PATCH v3 3/5] pinctrl: qcom: Move chip specific functions to
right files
On 12/1/2021 4:11 PM, Srinivas Kandagatla wrote:
Thanks for your time Srini!!!
>
> On 29/11/2021 09:58, Srinivasa Rao Mandadapu wrote:
>> Update lpass lpi pin control driver to accommodate new lpass variant
>> SoC specific drivers.
>> Move sm8250 SoC specific functions to pinctrl-sm8250-lpass-lpi.c file
>> and common declarations to pinctrl-lpass-lpi.h header file.
>>
>> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
>> Co-developed-by: Venkata Prasad Potturu <potturu@...eaurora.org>
>> Signed-off-by: Venkata Prasad Potturu <potturu@...eaurora.org>
>> ---
>> drivers/pinctrl/qcom/Makefile | 1 +
>> drivers/pinctrl/qcom/pinctrl-lpass-lpi.c | 251
>> +-----------------------
>> drivers/pinctrl/qcom/pinctrl-lpass-lpi.h | 139 +++++++++++++
>> drivers/pinctrl/qcom/pinctrl-sm8250-lpass-lpi.c | 125 ++++++++++++
>> 4 files changed, 271 insertions(+), 245 deletions(-)
>> create mode 100644 drivers/pinctrl/qcom/pinctrl-lpass-lpi.h
>> create mode 100644 drivers/pinctrl/qcom/pinctrl-sm8250-lpass-lpi.c
>>
>> diff --git a/drivers/pinctrl/qcom/Makefile
>> b/drivers/pinctrl/qcom/Makefile
>> index 7a12e8c..74568cf 100644
>> --- a/drivers/pinctrl/qcom/Makefile
>> +++ b/drivers/pinctrl/qcom/Makefile
>> @@ -37,3 +37,4 @@ obj-$(CONFIG_PINCTRL_SM8150) += pinctrl-sm8150.o
>> obj-$(CONFIG_PINCTRL_SM8250) += pinctrl-sm8250.o
>> obj-$(CONFIG_PINCTRL_SM8350) += pinctrl-sm8350.o
>> obj-$(CONFIG_PINCTRL_LPASS_LPI) += pinctrl-lpass-lpi.o
>> +obj-$(CONFIG_PINCTRL_LPASS_LPI) += pinctrl-sm8250-lpass-lpi.o
>
> This is confusing, either we make new
> CONFIG_PINCTRL_SM8250_LPASS_LPI here and use it for
> pinctrl-sm8250-lpass-lpi.o
Okay. Will add new config macro. Thought of changing it, but worried
that existing platforms may get disturbed.
>
>> diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
>> b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
>> index 2f19ab4..2641489 100644
>> --- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
>> +++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
>> @@ -4,237 +4,16 @@
>> * Copyright (c) 2020 Linaro Ltd.
>> */
>> -#include <linux/bitops.h>
>> -#include <linux/bitfield.h>
>
> Looks like some of these are removed without a reason.
>
Actually, as functions distributed to different files, moved few of them
to corresponding files,
and observed few of them are not required. could you please suggest on this?
>
>> #include <linux/clk.h>
>> #include <linux/gpio/driver.h>
>> -#include <linux/io.h>
>> -#include <linux/module.h>
>> #include <linux/of_device.h>
>> -#include <linux/of.h>
>> #include <linux/pinctrl/pinconf-generic.h>
>> #include <linux/pinctrl/pinconf.h>
>> #include <linux/pinctrl/pinmux.h>
>> -#include <linux/platform_device.h>
>> -#include <linux/slab.h>
>> -#include <linux/types.h>
>> #include "../core.h"
>> #include "../pinctrl-utils.h"
>> +#include "pinctrl-lpass-lpi.h"
>
> ...
>
>
>> -
>> -module_platform_driver(lpi_pinctrl_driver);
>> -MODULE_DESCRIPTION("QTI LPI GPIO pin control driver");
>> -MODULE_LICENSE("GPL");
>
> if you build this as Modules your build would fail without
> MODULE_LICENSE().
Okay. Will change accordingly.
>
>
>> diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.h
>> b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.h
>> new file mode 100644
>> index 0000000..b0afb40
>> --- /dev/null
>> +++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.h
>> @@ -0,0 +1,139 @@
>> +/* SPDX-License-Identifier: GPL-2.0-only */
>> +/*
>> + * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
>> + * Copyright (c) 2020 Linaro Ltd.
>> + */
>> +#ifndef __PINCTRL_LPASS_LPI_H__
>> +#define __PINCTRL_LPASS_LPI_H__
>> +
>> +#define LPI_SLEW_RATE_CTL_REG 0xa000
>> +#define LPI_TLMM_REG_OFFSET 0x1000
>> +#define LPI_SLEW_RATE_MAX 0x03
>> +#define LPI_SLEW_BITS_SIZE 0x02
>> +#define LPI_SLEW_RATE_MASK GENMASK(1, 0)
>> +#define LPI_GPIO_CFG_REG 0x00
>> +#define LPI_GPIO_PULL_MASK GENMASK(1, 0)
>> +#define LPI_GPIO_FUNCTION_MASK GENMASK(5, 2)
>> +#define LPI_GPIO_OUT_STRENGTH_MASK GENMASK(8, 6)
>> +#define LPI_GPIO_OE_MASK BIT(9)
>> +#define LPI_GPIO_VALUE_REG 0x04
>> +#define LPI_GPIO_VALUE_IN_MASK BIT(0)
>> +#define LPI_GPIO_VALUE_OUT_MASK BIT(1)
>> +
>> +#define LPI_GPIO_BIAS_DISABLE 0x0
>> +#define LPI_GPIO_PULL_DOWN 0x1
>> +#define LPI_GPIO_KEEPER 0x2
>> +#define LPI_GPIO_PULL_UP 0x3
>> +#define LPI_GPIO_DS_TO_VAL(v) (v / 2 - 1)
>> +#define NO_SLEW -1
>> +
>> +#define LPI_FUNCTION(fname) \
>> + [LPI_MUX_##fname] = { \
>> + .name = #fname, \
>> + .groups = fname##_groups, \
>> + .ngroups = ARRAY_SIZE(fname##_groups), \
>> + }
>> +
>> +#define LPI_PINGROUP(id, soff, f1, f2, f3, f4) \
>> + { \
>> + .name = "gpio" #id, \
>> + .pins = gpio##id##_pins, \
>> + .pin = id, \
>> + .slew_offset = soff, \
>> + .npins = ARRAY_SIZE(gpio##id##_pins), \
>> + .funcs = (int[]){ \
>> + LPI_MUX_gpio, \
>> + LPI_MUX_##f1, \
>> + LPI_MUX_##f2, \
>> + LPI_MUX_##f3, \
>> + LPI_MUX_##f4, \
>> + }, \
>> + .nfuncs = 5, \
>> + }
>> +
>> +struct lpi_pingroup {
>> + const char *name;
>> + const unsigned int *pins;
>> + unsigned int npins;
>> + unsigned int pin;
>> + /* Bit offset in slew register for SoundWire pins only */
>> + int slew_offset;
>> + unsigned int *funcs;
>> + unsigned int nfuncs;
>> +};
>> +
>> +struct lpi_function {
>> + const char *name;
>> + const char * const *groups;
>> + unsigned int ngroups;
>> +};
>> +
>> +struct lpi_pinctrl_variant_data {
>> + const struct pinctrl_pin_desc *pins;
>> + int npins;
>> + const struct lpi_pingroup *groups;
>> + int ngroups;
>> + const struct lpi_function *functions;
>> + int nfunctions;
>> +};
>> +
>> +#define MAX_LPI_NUM_CLKS 2
>> +
>> +struct lpi_pinctrl {
>> + struct device *dev;
>> + struct pinctrl_dev *ctrl;
>> + struct gpio_chip chip;
>> + struct pinctrl_desc desc;
>> + char __iomem *tlmm_base;
>> + char __iomem *slew_base;
>> + struct clk_bulk_data clks[MAX_LPI_NUM_CLKS];
>> + struct mutex slew_access_lock;
>> + const struct lpi_pinctrl_variant_data *data;
>> +};
>> +
>
> From here
> <<<
>
>> +enum lpass_lpi_functions {
>> + LPI_MUX_dmic1_clk,
>> + LPI_MUX_dmic1_data,
>> + LPI_MUX_dmic2_clk,
>> + LPI_MUX_dmic2_data,
>> + LPI_MUX_dmic3_clk,
>> + LPI_MUX_dmic3_data,
>> + LPI_MUX_i2s1_clk,
>> + LPI_MUX_i2s1_data,
>> + LPI_MUX_i2s1_ws,
>> + LPI_MUX_i2s2_clk,
>> + LPI_MUX_i2s2_data,
>> + LPI_MUX_i2s2_ws,
>> + LPI_MUX_qua_mi2s_data,
>> + LPI_MUX_qua_mi2s_sclk,
>> + LPI_MUX_qua_mi2s_ws,
>> + LPI_MUX_swr_rx_clk,
>> + LPI_MUX_swr_rx_data,
>> + LPI_MUX_swr_tx_clk,
>> + LPI_MUX_swr_tx_data,
>> + LPI_MUX_wsa_swr_clk,
>> + LPI_MUX_wsa_swr_data,
>> + LPI_MUX_gpio,
>> + LPI_MUX__,
>> +};
>> +
>> +static const unsigned int gpio0_pins[] = { 0 };
>> +static const unsigned int gpio1_pins[] = { 1 };
>> +static const unsigned int gpio2_pins[] = { 2 };
>> +static const unsigned int gpio3_pins[] = { 3 };
>> +static const unsigned int gpio4_pins[] = { 4 };
>> +static const unsigned int gpio5_pins[] = { 5 };
>> +static const unsigned int gpio6_pins[] = { 6 };
>> +static const unsigned int gpio7_pins[] = { 7 };
>> +static const unsigned int gpio8_pins[] = { 8 };
>> +static const unsigned int gpio9_pins[] = { 9 };
>> +static const unsigned int gpio10_pins[] = { 10 };
>> +static const unsigned int gpio11_pins[] = { 11 };
>> +static const unsigned int gpio12_pins[] = { 12 };
>> +static const unsigned int gpio13_pins[] = { 13 };
> >>>
> to here are specific to sm8250, so it should not be in header file to
> start with.
As these are common to all lpass variants.. I feel it's better to keep
in Header file.
And if new pins comes in later variants, we can add them incrementally,
and they will not impact existing pin numbers.
I think in upcoming variants number of pins will not decrease.
>
>
>> +
>> +int lpi_pinctrl_probe(struct platform_device *pdev);
>> +int lpi_pinctrl_remove(struct platform_device *pdev);
>> +
>> +#endif /*__PINCTRL_LPASS_LPI_H__*/
>> +
>> diff --git a/drivers/pinctrl/qcom/pinctrl-sm8250-lpass-lpi.c
>> b/drivers/pinctrl/qcom/pinctrl-sm8250-lpass-lpi.c
>> new file mode 100644
>> index 0000000..3eba8b3
>> --- /dev/null
>> +++ b/drivers/pinctrl/qcom/pinctrl-sm8250-lpass-lpi.c
>> @@ -0,0 +1,125 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>
> ...
>
>> +
>> +static struct platform_driver lpi_pinctrl_driver = {
>> + .driver = {
>> + .name = "qcom-sm8250-lpass-lpi-pinctrl",
>> + .of_match_table = lpi_pinctrl_of_match,
>> + },
>> + .probe = lpi_pinctrl_probe,
>> + .remove = lpi_pinctrl_remove,
>> +};
>> +
>> +module_platform_driver(lpi_pinctrl_driver);
>> +MODULE_DESCRIPTION("QTI LPI GPIO pin control driver");
>
> may be :
> "SM8250 LPI GPIO pin control driver"
Okay.. will change accordingly.
>
> --srini
>> +MODULE_LICENSE("GPL");
>> +
>>
--
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