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Mon, 22 Mar 2021 17:44:05 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 73A1810002A; Mon, 22 Mar 2021 17:44:04 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 4AB47237064; Mon, 22 Mar 2021 17:44:04 +0100 (CET) Received: from [10.211.8.180] (10.75.127.51) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 22 Mar 2021 17:44:02 +0100 Subject: Re: [Linux-stm32] [PATCH v10 22/33] counter: Internalize sysfs interface code To: William Breathitt Gray , CC: , , , , , , , , , Dan Carpenter , , , , , , References: <51becb2e067a4d2ee7bd99beb007831022fc4b29.1616150619.git.vilhelm.gray@gmail.com> From: Fabrice Gasnier Message-ID: <4cef2478-4093-fdef-2ae5-c27d0e8e1ccd@foss.st.com> Date: Mon, 22 Mar 2021 17:44:01 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <51becb2e067a4d2ee7bd99beb007831022fc4b29.1616150619.git.vilhelm.gray@gmail.com> Content-Language: en-US X-Originating-IP: [10.75.127.51] X-ClientProxiedBy: SFHDAG2NODE1.st.com (10.75.127.4) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-03-22_09:2021-03-22, 2021-03-22 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210322_164459_389691_EDA75D33 X-CRM114-Status: GOOD ( 45.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 3/19/21 12:00 PM, William Breathitt Gray wrote: > This is a reimplementation of the Generic Counter driver interface. > There are no modifications to the Counter subsystem userspace interface, > so existing userspace applications should continue to run seamlessly. > > The purpose of this patch is to internalize the sysfs interface code > among the various counter drivers into a shared module. Counter drivers > pass and take data natively (i.e. u8, u64, etc.) and the shared counter > module handles the translation between the sysfs interface and the > device drivers. This guarantees a standard userspace interface for all > counter drivers, and helps generalize the Generic Counter driver ABI in > order to support the Generic Counter chrdev interface (introduced in a > subsequent patch) without significant changes to the existing counter > drivers. > > Note, Counter device registration is the same as before: drivers > populate a struct counter_device with components and callbacks, then > pass the structure to the devm_counter_register function. However, > what's different now is how the Counter subsystem code handles this > registration internally. > > Whereas before callbacks would interact directly with sysfs data, this > interaction is now abstracted and instead callbacks interact with native > C data types. The counter_comp structure forms the basis for Counter > extensions. > > The counter-sysfs.c file contains the code to parse through the > counter_device structure and register the requested components and > extensions. Attributes are created and populated based on type, with > respective translation functions to handle the mapping between sysfs and > the counter driver callbacks. > > The translation performed for each attribute is straightforward: the > attribute type and data is parsed from the counter_attribute structure, > the respective counter driver read/write callback is called, and sysfs > I/O is handled before or after the driver read/write function is called. > > Cc: Syed Nayyar Waris > Cc: Patrick Havelange > Cc: Kamel Bouhara > Cc: Fabrice Gasnier > Cc: Maxime Coquelin > Cc: Alexandre Torgue > Cc: Dan Carpenter > Reviewed-by: David Lechner > Tested-by: David Lechner > Signed-off-by: William Breathitt Gray > --- > MAINTAINERS | 1 - > drivers/counter/104-quad-8.c | 449 +++---- > drivers/counter/Makefile | 1 + > drivers/counter/counter-core.c | 155 +++ > drivers/counter/counter-sysfs.c | 846 +++++++++++++ > drivers/counter/counter-sysfs.h | 13 + > drivers/counter/counter.c | 1496 ----------------------- > drivers/counter/ftm-quaddec.c | 56 +- > drivers/counter/interrupt-cnt.c | 62 +- > drivers/counter/microchip-tcb-capture.c | 93 +- > drivers/counter/stm32-lptimer-cnt.c | 162 ++- > drivers/counter/stm32-timer-cnt.c | 147 +-- > drivers/counter/ti-eqep.c | 180 +-- > include/linux/counter.h | 629 +++++----- > include/linux/counter_enum.h | 45 - > 15 files changed, 1857 insertions(+), 2478 deletions(-) > create mode 100644 drivers/counter/counter-core.c > create mode 100644 drivers/counter/counter-sysfs.c > create mode 100644 drivers/counter/counter-sysfs.h > delete mode 100644 drivers/counter/counter.c > delete mode 100644 include/linux/counter_enum.h > > diff --git a/MAINTAINERS b/MAINTAINERS > index ddabf7bb5246..1508db256784 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -4581,7 +4581,6 @@ F: Documentation/ABI/testing/sysfs-bus-counter > F: Documentation/driver-api/generic-counter.rst > F: drivers/counter/ > F: include/linux/counter.h > -F: include/linux/counter_enum.h > > CPMAC ETHERNET DRIVER > M: Florian Fainelli > diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c > index 5a49ace2d4a6..eb7d63769f4c 100644 > --- a/drivers/counter/104-quad-8.c > +++ b/drivers/counter/104-quad-8.c > @@ -116,7 +116,7 @@ static int quad8_signal_read(struct counter_device *counter, > } > > static int quad8_count_read(struct counter_device *counter, > - struct counter_count *count, unsigned long *val) > + struct counter_count *count, u64 *val) > { > struct quad8 *const priv = counter->priv; > const int base_offset = priv->base + 2 * count->id; > @@ -147,7 +147,7 @@ static int quad8_count_read(struct counter_device *counter, > } > > static int quad8_count_write(struct counter_device *counter, > - struct counter_count *count, unsigned long val) > + struct counter_count *count, u64 val) > { > struct quad8 *const priv = counter->priv; > const int base_offset = priv->base + 2 * count->id; > @@ -187,22 +187,16 @@ static int quad8_count_write(struct counter_device *counter, > return 0; > } > > -enum quad8_count_function { > - QUAD8_COUNT_FUNCTION_PULSE_DIRECTION = 0, > - QUAD8_COUNT_FUNCTION_QUADRATURE_X1, > - QUAD8_COUNT_FUNCTION_QUADRATURE_X2, > - QUAD8_COUNT_FUNCTION_QUADRATURE_X4 > -}; > - > static const enum counter_function quad8_count_functions_list[] = { > - [QUAD8_COUNT_FUNCTION_PULSE_DIRECTION] = COUNTER_FUNCTION_PULSE_DIRECTION, > - [QUAD8_COUNT_FUNCTION_QUADRATURE_X1] = COUNTER_FUNCTION_QUADRATURE_X1_A, > - [QUAD8_COUNT_FUNCTION_QUADRATURE_X2] = COUNTER_FUNCTION_QUADRATURE_X2_A, > - [QUAD8_COUNT_FUNCTION_QUADRATURE_X4] = COUNTER_FUNCTION_QUADRATURE_X4 > + COUNTER_FUNCTION_PULSE_DIRECTION, > + COUNTER_FUNCTION_QUADRATURE_X1_A, > + COUNTER_FUNCTION_QUADRATURE_X2_A, > + COUNTER_FUNCTION_QUADRATURE_X4, > }; > > -static int quad8_function_get(struct counter_device *counter, > - struct counter_count *count, size_t *function) > +static int quad8_function_read(struct counter_device *counter, > + struct counter_count *count, > + enum counter_function *function) > { > struct quad8 *const priv = counter->priv; > const int id = count->id; > @@ -212,25 +206,26 @@ static int quad8_function_get(struct counter_device *counter, > if (priv->quadrature_mode[id]) > switch (priv->quadrature_scale[id]) { > case 0: > - *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X1; > + *function = COUNTER_FUNCTION_QUADRATURE_X1_A; > break; > case 1: > - *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X2; > + *function = COUNTER_FUNCTION_QUADRATURE_X2_A; > break; > case 2: > - *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X4; > + *function = COUNTER_FUNCTION_QUADRATURE_X4; > break; > } > else > - *function = QUAD8_COUNT_FUNCTION_PULSE_DIRECTION; > + *function = COUNTER_FUNCTION_PULSE_DIRECTION; > > mutex_unlock(&priv->lock); > > return 0; > } [snip] > static const struct atmel_tcb_config tcb_rm9200_config = { > diff --git a/drivers/counter/stm32-lptimer-cnt.c b/drivers/counter/stm32-lptimer-cnt.c > index 13656957c45f..aef78a4217b5 100644 > --- a/drivers/counter/stm32-lptimer-cnt.c > +++ b/drivers/counter/stm32-lptimer-cnt.c > @@ -17,6 +17,7 @@ > #include > #include > #include > +#include > > struct stm32_lptim_cnt { > struct counter_device counter; > @@ -130,32 +131,46 @@ static int stm32_lptim_setup(struct stm32_lptim_cnt *priv, int enable) > * +---------+----------+----------+---------+----------+---------+ > */ > enum stm32_lptim_cnt_function { > - STM32_LPTIM_COUNTER_INCREASE, > - STM32_LPTIM_ENCODER_BOTH_EDGE, > + STM32_LPTIM_COUNTER_INCREASE = COUNTER_FUNCTION_INCREASE, > + STM32_LPTIM_ENCODER_BOTH_EDGE = COUNTER_FUNCTION_QUADRATURE_X4, Hi William, I'm wondering if this enum is still necessary. I noticed the enum is removed from the 104-quad-8 driver. > }; > > static const enum counter_function stm32_lptim_cnt_functions[] = { > - [STM32_LPTIM_COUNTER_INCREASE] = COUNTER_FUNCTION_INCREASE, > - [STM32_LPTIM_ENCODER_BOTH_EDGE] = COUNTER_FUNCTION_QUADRATURE_X4, > + STM32_LPTIM_COUNTER_INCREASE, > + STM32_LPTIM_ENCODER_BOTH_EDGE, > }; > > enum stm32_lptim_synapse_action { > + /* Index must match with stm32_lptim_cnt_polarity[] (priv->polarity) */ Arf... I forgot to update this comment in earlier commit: d8ac6b4 counter: stm32-lptimer-cnt: remove iio counter abi "stm32_lptim_cnt_polarity" doesn't exist anymore. So, this comment can be updated. This should match the priv->polarity, as it's used to write the "CKPOL" bits (e.g. 0x0 for rising, 0x1 falling, 0x2 both). Or do you wish I send a separate patch ? > STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE, > STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE, > STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES, > STM32_LPTIM_SYNAPSE_ACTION_NONE, > }; > > -static const enum counter_synapse_action stm32_lptim_cnt_synapse_actions[] = { > - /* Index must match with stm32_lptim_cnt_polarity[] (priv->polarity) */ > +static const enum stm32_lptim_synapse_action stm32_lptim_c2l_actions_map[] = { > + [COUNTER_SYNAPSE_ACTION_RISING_EDGE] = STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE, > + [COUNTER_SYNAPSE_ACTION_FALLING_EDGE] = STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE, > + [COUNTER_SYNAPSE_ACTION_BOTH_EDGES] = STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES, > + [COUNTER_SYNAPSE_ACTION_NONE] = STM32_LPTIM_SYNAPSE_ACTION_NONE, > +}; > + > +static const enum counter_synapse_action stm32_lptim_l2c_actions_map[] = { > [STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE, > [STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE] = COUNTER_SYNAPSE_ACTION_FALLING_EDGE, > [STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES, > [STM32_LPTIM_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE, > }; > > +static const enum counter_synapse_action stm32_lptim_cnt_synapse_actions[] = { > + COUNTER_SYNAPSE_ACTION_RISING_EDGE, > + COUNTER_SYNAPSE_ACTION_FALLING_EDGE, > + COUNTER_SYNAPSE_ACTION_BOTH_EDGES, > + COUNTER_SYNAPSE_ACTION_NONE, > +}; > + I'm getting confused with the two table entries, and the two enums that are very similar. Could it be simplified ? I'm thinking of something more straight-forward... in fact only one array should be enough, to convert from synapse action to CKPOL value before it's written to register in stm32_lptim_setup() routine. This should be easier now that the iio part has been removed. > static int stm32_lptim_cnt_read(struct counter_device *counter, > - struct counter_count *count, unsigned long *val) > + struct counter_count *count, u64 *val) > { > struct stm32_lptim_cnt *const priv = counter->priv; > u32 cnt; > @@ -170,9 +185,9 @@ static int stm32_lptim_cnt_read(struct counter_device *counter, > return 0; > } > > -static int stm32_lptim_cnt_function_get(struct counter_device *counter, > - struct counter_count *count, > - size_t *function) > +static int stm32_lptim_cnt_function_read(struct counter_device *counter, > + struct counter_count *count, > + enum counter_function *function) > { > struct stm32_lptim_cnt *const priv = counter->priv; > > @@ -189,9 +204,9 @@ static int stm32_lptim_cnt_function_get(struct counter_device *counter, > return -EINVAL; > } > > -static int stm32_lptim_cnt_function_set(struct counter_device *counter, > - struct counter_count *count, > - size_t function) > +static int stm32_lptim_cnt_function_write(struct counter_device *counter, > + struct counter_count *count, > + enum counter_function function) > { > struct stm32_lptim_cnt *const priv = counter->priv; > > @@ -212,9 +227,9 @@ static int stm32_lptim_cnt_function_set(struct counter_device *counter, > } > } > > -static ssize_t stm32_lptim_cnt_enable_read(struct counter_device *counter, > - struct counter_count *count, > - void *private, char *buf) > +static int stm32_lptim_cnt_enable_read(struct counter_device *counter, > + struct counter_count *count, > + u8 *enable) > { > struct stm32_lptim_cnt *const priv = counter->priv; > int ret; > @@ -223,22 +238,18 @@ static ssize_t stm32_lptim_cnt_enable_read(struct counter_device *counter, > if (ret < 0) > return ret; > > - return scnprintf(buf, PAGE_SIZE, "%u\n", ret); > + *enable = ret; > + > + return 0; > } > > -static ssize_t stm32_lptim_cnt_enable_write(struct counter_device *counter, > - struct counter_count *count, > - void *private, > - const char *buf, size_t len) > +static int stm32_lptim_cnt_enable_write(struct counter_device *counter, > + struct counter_count *count, > + u8 enable) > { > struct stm32_lptim_cnt *const priv = counter->priv; > - bool enable; > int ret; > > - ret = kstrtobool(buf, &enable); > - if (ret) > - return ret; > - > /* Check nobody uses the timer, or already disabled/enabled */ > ret = stm32_lptim_is_enabled(priv); > if ((ret < 0) || (!ret && !enable)) > @@ -254,65 +265,54 @@ static ssize_t stm32_lptim_cnt_enable_write(struct counter_device *counter, > if (ret) > return ret; > > - return len; > + return 0; > } > > -static ssize_t stm32_lptim_cnt_ceiling_read(struct counter_device *counter, > - struct counter_count *count, > - void *private, char *buf) > +static int stm32_lptim_cnt_ceiling_read(struct counter_device *counter, > + struct counter_count *count, > + u64 *ceiling) > { > struct stm32_lptim_cnt *const priv = counter->priv; > > - return snprintf(buf, PAGE_SIZE, "%u\n", priv->ceiling); > + *ceiling = priv->ceiling; > + > + return 0; > } > > -static ssize_t stm32_lptim_cnt_ceiling_write(struct counter_device *counter, > - struct counter_count *count, > - void *private, > - const char *buf, size_t len) > +static int stm32_lptim_cnt_ceiling_write(struct counter_device *counter, > + struct counter_count *count, > + u64 ceiling) > { > struct stm32_lptim_cnt *const priv = counter->priv; > - unsigned int ceiling; > - int ret; > > if (stm32_lptim_is_enabled(priv)) > return -EBUSY; > > - ret = kstrtouint(buf, 0, &ceiling); > - if (ret) > - return ret; > - > if (ceiling > STM32_LPTIM_MAX_ARR) > return -ERANGE; > > priv->ceiling = ceiling; > > - return len; > + return 0; > } > > -static const struct counter_count_ext stm32_lptim_cnt_ext[] = { > - { > - .name = "enable", > - .read = stm32_lptim_cnt_enable_read, > - .write = stm32_lptim_cnt_enable_write > - }, > - { > - .name = "ceiling", > - .read = stm32_lptim_cnt_ceiling_read, > - .write = stm32_lptim_cnt_ceiling_write > - }, > +static struct counter_comp stm32_lptim_cnt_ext[] = { > + COUNTER_COMP_ENABLE(stm32_lptim_cnt_enable_read, > + stm32_lptim_cnt_enable_write), > + COUNTER_COMP_CEILING(stm32_lptim_cnt_ceiling_read, > + stm32_lptim_cnt_ceiling_write), > }; > > -static int stm32_lptim_cnt_action_get(struct counter_device *counter, > - struct counter_count *count, > - struct counter_synapse *synapse, > - size_t *action) > +static int stm32_lptim_cnt_action_read(struct counter_device *counter, > + struct counter_count *count, > + struct counter_synapse *synapse, > + enum counter_synapse_action *action) > { > struct stm32_lptim_cnt *const priv = counter->priv; > - size_t function; > + enum counter_function function; > int err; > > - err = stm32_lptim_cnt_function_get(counter, count, &function); > + err = stm32_lptim_cnt_function_read(counter, count, &function); > if (err) > return err; > > @@ -320,12 +320,12 @@ static int stm32_lptim_cnt_action_get(struct counter_device *counter, > case STM32_LPTIM_COUNTER_INCREASE: > /* LP Timer acts as up-counter on input 1 */ > if (synapse->signal->id == count->synapses[0].signal->id) > - *action = priv->polarity; > + *action = stm32_lptim_l2c_actions_map[priv->polarity]; > else > - *action = STM32_LPTIM_SYNAPSE_ACTION_NONE; > + *action = COUNTER_SYNAPSE_ACTION_NONE; > return 0; > case STM32_LPTIM_ENCODER_BOTH_EDGE: > - *action = priv->polarity; > + *action = stm32_lptim_l2c_actions_map[priv->polarity]; > return 0; > default: > /* should never reach this path */ > @@ -333,43 +333,39 @@ static int stm32_lptim_cnt_action_get(struct counter_device *counter, > } > } > > -static int stm32_lptim_cnt_action_set(struct counter_device *counter, > - struct counter_count *count, > - struct counter_synapse *synapse, > - size_t action) > +static int stm32_lptim_cnt_action_write(struct counter_device *counter, > + struct counter_count *count, > + struct counter_synapse *synapse, > + enum counter_synapse_action action) > { > struct stm32_lptim_cnt *const priv = counter->priv; > - size_t function; > + enum counter_function function; > int err; > > if (stm32_lptim_is_enabled(priv)) > return -EBUSY; > > - err = stm32_lptim_cnt_function_get(counter, count, &function); > + err = stm32_lptim_cnt_function_read(counter, count, &function); > if (err) > return err; > > /* only set polarity when in counter mode (on input 1) */ > - if (function == STM32_LPTIM_COUNTER_INCREASE > - && synapse->signal->id == count->synapses[0].signal->id) { > - switch (action) { > - case STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE: > - case STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE: > - case STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES: > - priv->polarity = action; > - return 0; > - } > - } > + if ((enum stm32_lptim_cnt_function)function != STM32_LPTIM_COUNTER_INCREASE Could COUNTER_FUNCTION_INCREASE be used directly here, to avoid casting ? > + || synapse->signal->id != count->synapses[0].signal->id > + || action == COUNTER_SYNAPSE_ACTION_NONE) > + return -EINVAL; > > - return -EINVAL; > + priv->polarity = stm32_lptim_c2l_actions_map[action]; > + > + return 0; > } > > static const struct counter_ops stm32_lptim_cnt_ops = { > .count_read = stm32_lptim_cnt_read, > - .function_get = stm32_lptim_cnt_function_get, > - .function_set = stm32_lptim_cnt_function_set, > - .action_get = stm32_lptim_cnt_action_get, > - .action_set = stm32_lptim_cnt_action_set, > + .function_read = stm32_lptim_cnt_function_read, > + .function_write = stm32_lptim_cnt_function_write, > + .action_read = stm32_lptim_cnt_action_read, > + .action_write = stm32_lptim_cnt_action_write, > }; > > static struct counter_signal stm32_lptim_cnt_signals[] = { > diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c > index 3fb0debd7425..c690b76e5dab 100644 > --- a/drivers/counter/stm32-timer-cnt.c > +++ b/drivers/counter/stm32-timer-cnt.c > @@ -13,6 +13,7 @@ > #include > #include > #include > +#include > > #define TIM_CCMR_CCXS (BIT(8) | BIT(0)) > #define TIM_CCMR_MASK (TIM_CCMR_CC1S | TIM_CCMR_CC2S | \ > @@ -44,21 +45,21 @@ struct stm32_timer_cnt { > * @STM32_COUNT_ENCODER_MODE_3: counts on both TI1FP1 and TI2FP2 edges > */ > enum stm32_count_function { > + STM32_COUNT_SLAVE_MODE_DISABLED = COUNTER_FUNCTION_INCREASE, > + STM32_COUNT_ENCODER_MODE_1 = COUNTER_FUNCTION_QUADRATURE_X2_A, > + STM32_COUNT_ENCODER_MODE_2 = COUNTER_FUNCTION_QUADRATURE_X2_B, > + STM32_COUNT_ENCODER_MODE_3 = COUNTER_FUNCTION_QUADRATURE_X4, > +}; > + Same as for the LPTIM driver above, I noticed the enum is removed from the 104-quad-8 driver. I'm fine both ways... I just feel like this could be more consistent later in the function read/write routines to report enum from the counter_function definition (e.g. like COUNTER_FUNCTION_QUADRATURE_X4 instead of STM32_COUNT_ENCODER_MODE_3). Thanks, Fabrice > +static const enum counter_function stm32_count_functions[] = { > STM32_COUNT_SLAVE_MODE_DISABLED, > STM32_COUNT_ENCODER_MODE_1, > STM32_COUNT_ENCODER_MODE_2, > STM32_COUNT_ENCODER_MODE_3, > }; > > -static const enum counter_function stm32_count_functions[] = { > - [STM32_COUNT_SLAVE_MODE_DISABLED] = COUNTER_FUNCTION_INCREASE, > - [STM32_COUNT_ENCODER_MODE_1] = COUNTER_FUNCTION_QUADRATURE_X2_A, > - [STM32_COUNT_ENCODER_MODE_2] = COUNTER_FUNCTION_QUADRATURE_X2_B, > - [STM32_COUNT_ENCODER_MODE_3] = COUNTER_FUNCTION_QUADRATURE_X4, > -}; > - > static int stm32_count_read(struct counter_device *counter, > - struct counter_count *count, unsigned long *val) > + struct counter_count *count, u64 *val) > { > struct stm32_timer_cnt *const priv = counter->priv; > u32 cnt; > @@ -70,8 +71,7 @@ static int stm32_count_read(struct counter_device *counter, > } > > static int stm32_count_write(struct counter_device *counter, > - struct counter_count *count, > - const unsigned long val) > + struct counter_count *count, const u64 val) > { > struct stm32_timer_cnt *const priv = counter->priv; > u32 ceiling; > @@ -83,9 +83,9 @@ static int stm32_count_write(struct counter_device *counter, > return regmap_write(priv->regmap, TIM_CNT, val); > } > > -static int stm32_count_function_get(struct counter_device *counter, > - struct counter_count *count, > - size_t *function) > +static int stm32_count_function_read(struct counter_device *counter, > + struct counter_count *count, > + enum counter_function *function) > { > struct stm32_timer_cnt *const priv = counter->priv; > u32 smcr; > @@ -110,9 +110,9 @@ static int stm32_count_function_get(struct counter_device *counter, > } > } > > -static int stm32_count_function_set(struct counter_device *counter, > - struct counter_count *count, > - size_t function) > +static int stm32_count_function_write(struct counter_device *counter, > + struct counter_count *count, > + enum counter_function function) > { > struct stm32_timer_cnt *const priv = counter->priv; > u32 cr1, sms; > @@ -150,44 +150,37 @@ static int stm32_count_function_set(struct counter_device *counter, > return 0; > } > > -static ssize_t stm32_count_direction_read(struct counter_device *counter, > +static int stm32_count_direction_read(struct counter_device *counter, > struct counter_count *count, > - void *private, char *buf) > + enum counter_count_direction *direction) > { > struct stm32_timer_cnt *const priv = counter->priv; > - const char *direction; > u32 cr1; > > regmap_read(priv->regmap, TIM_CR1, &cr1); > - direction = (cr1 & TIM_CR1_DIR) ? "backward" : "forward"; > + *direction = (cr1 & TIM_CR1_DIR) ? COUNTER_COUNT_DIRECTION_BACKWARD : > + COUNTER_COUNT_DIRECTION_FORWARD; > > - return scnprintf(buf, PAGE_SIZE, "%s\n", direction); > + return 0; > } > > -static ssize_t stm32_count_ceiling_read(struct counter_device *counter, > - struct counter_count *count, > - void *private, char *buf) > +static int stm32_count_ceiling_read(struct counter_device *counter, > + struct counter_count *count, u64 *ceiling) > { > struct stm32_timer_cnt *const priv = counter->priv; > u32 arr; > > regmap_read(priv->regmap, TIM_ARR, &arr); > > - return snprintf(buf, PAGE_SIZE, "%u\n", arr); > + *ceiling = arr; > + > + return 0; > } > > -static ssize_t stm32_count_ceiling_write(struct counter_device *counter, > - struct counter_count *count, > - void *private, > - const char *buf, size_t len) > +static int stm32_count_ceiling_write(struct counter_device *counter, > + struct counter_count *count, u64 ceiling) > { > struct stm32_timer_cnt *const priv = counter->priv; > - unsigned int ceiling; > - int ret; > - > - ret = kstrtouint(buf, 0, &ceiling); > - if (ret) > - return ret; > > if (ceiling > priv->max_arr) > return -ERANGE; > @@ -196,34 +189,27 @@ static ssize_t stm32_count_ceiling_write(struct counter_device *counter, > regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, 0); > regmap_write(priv->regmap, TIM_ARR, ceiling); > > - return len; > + return 0; > } > > -static ssize_t stm32_count_enable_read(struct counter_device *counter, > - struct counter_count *count, > - void *private, char *buf) > +static int stm32_count_enable_read(struct counter_device *counter, > + struct counter_count *count, u8 *enable) > { > struct stm32_timer_cnt *const priv = counter->priv; > u32 cr1; > > regmap_read(priv->regmap, TIM_CR1, &cr1); > > - return scnprintf(buf, PAGE_SIZE, "%d\n", (bool)(cr1 & TIM_CR1_CEN)); > + *enable = cr1 & TIM_CR1_CEN; > + > + return 0; > } > > -static ssize_t stm32_count_enable_write(struct counter_device *counter, > - struct counter_count *count, > - void *private, > - const char *buf, size_t len) > +static int stm32_count_enable_write(struct counter_device *counter, > + struct counter_count *count, u8 enable) > { > struct stm32_timer_cnt *const priv = counter->priv; > - int err; > u32 cr1; > - bool enable; > - > - err = kstrtobool(buf, &enable); > - if (err) > - return err; > > if (enable) { > regmap_read(priv->regmap, TIM_CR1, &cr1); > @@ -242,70 +228,55 @@ static ssize_t stm32_count_enable_write(struct counter_device *counter, > /* Keep enabled state to properly handle low power states */ > priv->enabled = enable; > > - return len; > + return 0; > } > > -static const struct counter_count_ext stm32_count_ext[] = { > - { > - .name = "direction", > - .read = stm32_count_direction_read, > - }, > - { > - .name = "enable", > - .read = stm32_count_enable_read, > - .write = stm32_count_enable_write > - }, > - { > - .name = "ceiling", > - .read = stm32_count_ceiling_read, > - .write = stm32_count_ceiling_write > - }, > -}; > - > -enum stm32_synapse_action { > - STM32_SYNAPSE_ACTION_NONE, > - STM32_SYNAPSE_ACTION_BOTH_EDGES > +static struct counter_comp stm32_count_ext[] = { > + COUNTER_COMP_DIRECTION(stm32_count_direction_read), > + COUNTER_COMP_ENABLE(stm32_count_enable_read, stm32_count_enable_write), > + COUNTER_COMP_CEILING(stm32_count_ceiling_read, > + stm32_count_ceiling_write), > }; > > static const enum counter_synapse_action stm32_synapse_actions[] = { > - [STM32_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE, > - [STM32_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES > + COUNTER_SYNAPSE_ACTION_NONE, > + COUNTER_SYNAPSE_ACTION_BOTH_EDGES > }; > > -static int stm32_action_get(struct counter_device *counter, > - struct counter_count *count, > - struct counter_synapse *synapse, > - size_t *action) > +static int stm32_action_read(struct counter_device *counter, > + struct counter_count *count, > + struct counter_synapse *synapse, > + enum counter_synapse_action *action) > { > - size_t function; > + enum counter_function function; > int err; > > - err = stm32_count_function_get(counter, count, &function); > + err = stm32_count_function_read(counter, count, &function); > if (err) > return err; > > switch (function) { > case STM32_COUNT_SLAVE_MODE_DISABLED: > /* counts on internal clock when CEN=1 */ > - *action = STM32_SYNAPSE_ACTION_NONE; > + *action = COUNTER_SYNAPSE_ACTION_NONE; > return 0; > case STM32_COUNT_ENCODER_MODE_1: > /* counts up/down on TI1FP1 edge depending on TI2FP2 level */ > if (synapse->signal->id == count->synapses[0].signal->id) > - *action = STM32_SYNAPSE_ACTION_BOTH_EDGES; > + *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; > else > - *action = STM32_SYNAPSE_ACTION_NONE; > + *action = COUNTER_SYNAPSE_ACTION_NONE; > return 0; > case STM32_COUNT_ENCODER_MODE_2: > /* counts up/down on TI2FP2 edge depending on TI1FP1 level */ > if (synapse->signal->id == count->synapses[1].signal->id) > - *action = STM32_SYNAPSE_ACTION_BOTH_EDGES; > + *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; > else > - *action = STM32_SYNAPSE_ACTION_NONE; > + *action = COUNTER_SYNAPSE_ACTION_NONE; > return 0; > case STM32_COUNT_ENCODER_MODE_3: > /* counts up/down on both TI1FP1 and TI2FP2 edges */ > - *action = STM32_SYNAPSE_ACTION_BOTH_EDGES; > + *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; > return 0; > default: > return -EINVAL; > @@ -315,9 +286,9 @@ static int stm32_action_get(struct counter_device *counter, > static const struct counter_ops stm32_timer_cnt_ops = { > .count_read = stm32_count_read, > .count_write = stm32_count_write, > - .function_get = stm32_count_function_get, > - .function_set = stm32_count_function_set, > - .action_get = stm32_action_get, > + .function_read = stm32_count_function_read, > + .function_write = stm32_count_function_write, > + .action_read = stm32_action_read, > }; > > static struct counter_signal stm32_signals[] = { > diff --git a/drivers/counter/ti-eqep.c b/drivers/counter/ti-eqep.c > index 04be25ebf4a4..6ff53d3164f5 100644 > --- a/drivers/counter/ti-eqep.c > +++ b/drivers/counter/ti-eqep.c > @@ -13,6 +13,7 @@ > #include > #include > #include > +#include > > /* 32-bit registers */ > #define QPOSCNT 0x0 > @@ -73,19 +74,13 @@ enum { > }; > > /* Position Counter Input Modes */ > -enum { > +enum ti_eqep_count_func { > TI_EQEP_COUNT_FUNC_QUAD_COUNT, > TI_EQEP_COUNT_FUNC_DIR_COUNT, > TI_EQEP_COUNT_FUNC_UP_COUNT, > TI_EQEP_COUNT_FUNC_DOWN_COUNT, > }; > > -enum { > - TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES, > - TI_EQEP_SYNAPSE_ACTION_RISING_EDGE, > - TI_EQEP_SYNAPSE_ACTION_NONE, > -}; > - > struct ti_eqep_cnt { > struct counter_device counter; > struct regmap *regmap32; > @@ -93,7 +88,7 @@ struct ti_eqep_cnt { > }; > > static int ti_eqep_count_read(struct counter_device *counter, > - struct counter_count *count, unsigned long *val) > + struct counter_count *count, u64 *val) > { > struct ti_eqep_cnt *priv = counter->priv; > u32 cnt; > @@ -105,7 +100,7 @@ static int ti_eqep_count_read(struct counter_device *counter, > } > > static int ti_eqep_count_write(struct counter_device *counter, > - struct counter_count *count, unsigned long val) > + struct counter_count *count, u64 val) > { > struct ti_eqep_cnt *priv = counter->priv; > u32 max; > @@ -117,63 +112,99 @@ static int ti_eqep_count_write(struct counter_device *counter, > return regmap_write(priv->regmap32, QPOSCNT, val); > } > > -static int ti_eqep_function_get(struct counter_device *counter, > - struct counter_count *count, size_t *function) > +static int ti_eqep_function_read(struct counter_device *counter, > + struct counter_count *count, > + enum counter_function *function) > { > struct ti_eqep_cnt *priv = counter->priv; > u32 qdecctl; > > regmap_read(priv->regmap16, QDECCTL, &qdecctl); > - *function = (qdecctl & QDECCTL_QSRC) >> QDECCTL_QSRC_SHIFT; > + > + switch ((qdecctl & QDECCTL_QSRC) >> QDECCTL_QSRC_SHIFT) { > + case TI_EQEP_COUNT_FUNC_QUAD_COUNT: > + *function = COUNTER_FUNCTION_QUADRATURE_X4; > + break; > + case TI_EQEP_COUNT_FUNC_DIR_COUNT: > + *function = COUNTER_FUNCTION_PULSE_DIRECTION; > + break; > + case TI_EQEP_COUNT_FUNC_UP_COUNT: > + *function = COUNTER_FUNCTION_INCREASE; > + break; > + case TI_EQEP_COUNT_FUNC_DOWN_COUNT: > + *function = COUNTER_FUNCTION_DECREASE; > + break; > + } > > return 0; > } > > -static int ti_eqep_function_set(struct counter_device *counter, > - struct counter_count *count, size_t function) > +static int ti_eqep_function_write(struct counter_device *counter, > + struct counter_count *count, > + enum counter_function function) > { > struct ti_eqep_cnt *priv = counter->priv; > + enum ti_eqep_count_func qsrc; > + > + switch (function) { > + case COUNTER_FUNCTION_QUADRATURE_X4: > + qsrc = TI_EQEP_COUNT_FUNC_QUAD_COUNT; > + break; > + case COUNTER_FUNCTION_PULSE_DIRECTION: > + qsrc = TI_EQEP_COUNT_FUNC_DIR_COUNT; > + break; > + case COUNTER_FUNCTION_INCREASE: > + qsrc = TI_EQEP_COUNT_FUNC_UP_COUNT; > + break; > + case COUNTER_FUNCTION_DECREASE: > + qsrc = TI_EQEP_COUNT_FUNC_DOWN_COUNT; > + break; > + default: > + /* should never reach this path */ > + return -EINVAL; > + } > > return regmap_write_bits(priv->regmap16, QDECCTL, QDECCTL_QSRC, > - function << QDECCTL_QSRC_SHIFT); > + qsrc << QDECCTL_QSRC_SHIFT); > } > > -static int ti_eqep_action_get(struct counter_device *counter, > - struct counter_count *count, > - struct counter_synapse *synapse, size_t *action) > +static int ti_eqep_action_read(struct counter_device *counter, > + struct counter_count *count, > + struct counter_synapse *synapse, > + enum counter_synapse_action *action) > { > struct ti_eqep_cnt *priv = counter->priv; > - size_t function; > + enum counter_function function; > u32 qdecctl; > int err; > > - err = ti_eqep_function_get(counter, count, &function); > + err = ti_eqep_function_read(counter, count, &function); > if (err) > return err; > > switch (function) { > - case TI_EQEP_COUNT_FUNC_QUAD_COUNT: > + case COUNTER_FUNCTION_QUADRATURE_X4: > /* In quadrature mode, the rising and falling edge of both > * QEPA and QEPB trigger QCLK. > */ > - *action = TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES; > + *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; > return 0; > - case TI_EQEP_COUNT_FUNC_DIR_COUNT: > + case COUNTER_FUNCTION_PULSE_DIRECTION: > /* In direction-count mode only rising edge of QEPA is counted > * and QEPB gives direction. > */ > if (synapse->signal->id == TI_EQEP_SIGNAL_QEPB) > - *action = TI_EQEP_SYNAPSE_ACTION_NONE; > + *action = COUNTER_SYNAPSE_ACTION_NONE; > else > - *action = TI_EQEP_SYNAPSE_ACTION_RISING_EDGE; > + *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE; > return 0; > - case TI_EQEP_COUNT_FUNC_UP_COUNT: > - case TI_EQEP_COUNT_FUNC_DOWN_COUNT: > + case COUNTER_FUNCTION_INCREASE: > + case COUNTER_FUNCTION_DECREASE: > /* In up/down-count modes only QEPA is counted and QEPB is not > * used. > */ > if (synapse->signal->id == TI_EQEP_SIGNAL_QEPB) { > - *action = TI_EQEP_SYNAPSE_ACTION_NONE; > + *action = COUNTER_SYNAPSE_ACTION_NONE; > return 0; > } > > @@ -182,9 +213,9 @@ static int ti_eqep_action_get(struct counter_device *counter, > return err; > > if (qdecctl & QDECCTL_XCR) > - *action = TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES; > + *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; > else > - *action = TI_EQEP_SYNAPSE_ACTION_RISING_EDGE; > + *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE; > return 0; > default: > /* should never reach this path */ > @@ -195,82 +226,67 @@ static int ti_eqep_action_get(struct counter_device *counter, > static const struct counter_ops ti_eqep_counter_ops = { > .count_read = ti_eqep_count_read, > .count_write = ti_eqep_count_write, > - .function_get = ti_eqep_function_get, > - .function_set = ti_eqep_function_set, > - .action_get = ti_eqep_action_get, > + .function_read = ti_eqep_function_read, > + .function_write = ti_eqep_function_write, > + .action_read = ti_eqep_action_read, > }; > > -static ssize_t ti_eqep_position_ceiling_read(struct counter_device *counter, > - struct counter_count *count, > - void *ext_priv, char *buf) > +static int ti_eqep_position_ceiling_read(struct counter_device *counter, > + struct counter_count *count, > + u64 *ceiling) > { > struct ti_eqep_cnt *priv = counter->priv; > u32 qposmax; > > regmap_read(priv->regmap32, QPOSMAX, &qposmax); > > - return sprintf(buf, "%u\n", qposmax); > + *ceiling = qposmax; > + > + return 0; > } > > -static ssize_t ti_eqep_position_ceiling_write(struct counter_device *counter, > - struct counter_count *count, > - void *ext_priv, const char *buf, > - size_t len) > +static int ti_eqep_position_ceiling_write(struct counter_device *counter, > + struct counter_count *count, > + u64 ceiling) > { > struct ti_eqep_cnt *priv = counter->priv; > - int err; > - u32 res; > > - err = kstrtouint(buf, 0, &res); > - if (err < 0) > - return err; > + if (ceiling != (u32)ceiling) > + return -ERANGE; > > - regmap_write(priv->regmap32, QPOSMAX, res); > + regmap_write(priv->regmap32, QPOSMAX, ceiling); > > - return len; > + return 0; > } > > -static ssize_t ti_eqep_position_enable_read(struct counter_device *counter, > - struct counter_count *count, > - void *ext_priv, char *buf) > +static int ti_eqep_position_enable_read(struct counter_device *counter, > + struct counter_count *count, u8 *enable) > { > struct ti_eqep_cnt *priv = counter->priv; > u32 qepctl; > > regmap_read(priv->regmap16, QEPCTL, &qepctl); > > - return sprintf(buf, "%u\n", !!(qepctl & QEPCTL_PHEN)); > + *enable = !!(qepctl & QEPCTL_PHEN); > + > + return 0; > } > > -static ssize_t ti_eqep_position_enable_write(struct counter_device *counter, > - struct counter_count *count, > - void *ext_priv, const char *buf, > - size_t len) > +static int ti_eqep_position_enable_write(struct counter_device *counter, > + struct counter_count *count, u8 enable) > { > struct ti_eqep_cnt *priv = counter->priv; > - int err; > - bool res; > - > - err = kstrtobool(buf, &res); > - if (err < 0) > - return err; > > - regmap_write_bits(priv->regmap16, QEPCTL, QEPCTL_PHEN, res ? -1 : 0); > + regmap_write_bits(priv->regmap16, QEPCTL, QEPCTL_PHEN, enable ? -1 : 0); > > - return len; > + return 0; > } > > -static struct counter_count_ext ti_eqep_position_ext[] = { > - { > - .name = "ceiling", > - .read = ti_eqep_position_ceiling_read, > - .write = ti_eqep_position_ceiling_write, > - }, > - { > - .name = "enable", > - .read = ti_eqep_position_enable_read, > - .write = ti_eqep_position_enable_write, > - }, > +static struct counter_comp ti_eqep_position_ext[] = { > + COUNTER_COMP_CEILING(ti_eqep_position_ceiling_read, > + ti_eqep_position_ceiling_write), > + COUNTER_COMP_ENABLE(ti_eqep_position_enable_read, > + ti_eqep_position_enable_write), > }; > > static struct counter_signal ti_eqep_signals[] = { > @@ -285,16 +301,16 @@ static struct counter_signal ti_eqep_signals[] = { > }; > > static const enum counter_function ti_eqep_position_functions[] = { > - [TI_EQEP_COUNT_FUNC_QUAD_COUNT] = COUNTER_FUNCTION_QUADRATURE_X4, > - [TI_EQEP_COUNT_FUNC_DIR_COUNT] = COUNTER_FUNCTION_PULSE_DIRECTION, > - [TI_EQEP_COUNT_FUNC_UP_COUNT] = COUNTER_FUNCTION_INCREASE, > - [TI_EQEP_COUNT_FUNC_DOWN_COUNT] = COUNTER_FUNCTION_DECREASE, > + COUNTER_FUNCTION_QUADRATURE_X4, > + COUNTER_FUNCTION_PULSE_DIRECTION, > + COUNTER_FUNCTION_INCREASE, > + COUNTER_FUNCTION_DECREASE, > }; > > static const enum counter_synapse_action ti_eqep_position_synapse_actions[] = { > - [TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES, > - [TI_EQEP_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE, > - [TI_EQEP_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE, > + COUNTER_SYNAPSE_ACTION_BOTH_EDGES, > + COUNTER_SYNAPSE_ACTION_RISING_EDGE, > + COUNTER_SYNAPSE_ACTION_NONE, > }; > > static struct counter_synapse ti_eqep_position_synapses[] = { > diff --git a/include/linux/counter.h b/include/linux/counter.h > index d16ce2819b48..567471818ec3 100644 > --- a/include/linux/counter.h > +++ b/include/linux/counter.h > @@ -6,42 +6,184 @@ > #ifndef _COUNTER_H_ > #define _COUNTER_H_ > > -#include > #include > +#include > #include > > +struct counter_device; > +struct counter_count; > +struct counter_synapse; > +struct counter_signal; > + > +enum counter_comp_type { > + COUNTER_COMP_U8, > + COUNTER_COMP_U64, > + COUNTER_COMP_BOOL, > + COUNTER_COMP_SIGNAL_LEVEL, > + COUNTER_COMP_FUNCTION, > + COUNTER_COMP_SYNAPSE_ACTION, > + COUNTER_COMP_ENUM, > + COUNTER_COMP_COUNT_DIRECTION, > + COUNTER_COMP_COUNT_MODE, > +}; > + > +enum counter_scope { > + COUNTER_SCOPE_DEVICE, > + COUNTER_SCOPE_SIGNAL, > + COUNTER_SCOPE_COUNT, > +}; > + > enum counter_count_direction { > - COUNTER_COUNT_DIRECTION_FORWARD = 0, > - COUNTER_COUNT_DIRECTION_BACKWARD > + COUNTER_COUNT_DIRECTION_FORWARD, > + COUNTER_COUNT_DIRECTION_BACKWARD, > }; > -extern const char *const counter_count_direction_str[2]; > > enum counter_count_mode { > - COUNTER_COUNT_MODE_NORMAL = 0, > + COUNTER_COUNT_MODE_NORMAL, > COUNTER_COUNT_MODE_RANGE_LIMIT, > COUNTER_COUNT_MODE_NON_RECYCLE, > - COUNTER_COUNT_MODE_MODULO_N > + COUNTER_COUNT_MODE_MODULO_N, > }; > -extern const char *const counter_count_mode_str[4]; > > -struct counter_device; > -struct counter_signal; > +enum counter_function { > + COUNTER_FUNCTION_INCREASE, > + COUNTER_FUNCTION_DECREASE, > + COUNTER_FUNCTION_PULSE_DIRECTION, > + COUNTER_FUNCTION_QUADRATURE_X1_A, > + COUNTER_FUNCTION_QUADRATURE_X1_B, > + COUNTER_FUNCTION_QUADRATURE_X2_A, > + COUNTER_FUNCTION_QUADRATURE_X2_B, > + COUNTER_FUNCTION_QUADRATURE_X4, > +}; > + > +enum counter_signal_level { > + COUNTER_SIGNAL_LEVEL_LOW, > + COUNTER_SIGNAL_LEVEL_HIGH, > +}; > + > +enum counter_synapse_action { > + COUNTER_SYNAPSE_ACTION_NONE, > + COUNTER_SYNAPSE_ACTION_RISING_EDGE, > + COUNTER_SYNAPSE_ACTION_FALLING_EDGE, > + COUNTER_SYNAPSE_ACTION_BOTH_EDGES, > +}; > > /** > - * struct counter_signal_ext - Counter Signal extensions > - * @name: attribute name > - * @read: read callback for this attribute; may be NULL > - * @write: write callback for this attribute; may be NULL > - * @priv: data private to the driver > + * struct counter_comp - Counter component node > + * @type: Counter component data type > + * @name: device-specific component name > + * @priv: component-relevant data > + * @action_read Synapse action mode read callback. The read value of the > + * respective Synapse action mode should be passed back via > + * the action parameter. > + * @device_u8_read Device u8 component read callback. The read value of the > + * respective Device u8 component should be passed back via > + * the val parameter. > + * @count_u8_read Count u8 component read callback. The read value of the > + * respective Count u8 component should be passed back via > + * the val parameter. > + * @signal_u8_read Signal u8 component read callback. The read value of the > + * respective Signal u8 component should be passed back via > + * the val parameter. > + * @device_u32_read Device u32 component read callback. The read value of > + * the respective Device u32 component should be passed > + * back via the val parameter. > + * @count_u32_read Count u32 component read callback. The read value of the > + * respective Count u32 component should be passed back via > + * the val parameter. > + * @signal_u32_read Signal u32 component read callback. The read value of > + * the respective Signal u32 component should be passed > + * back via the val parameter. > + * @device_u64_read Device u64 component read callback. The read value of > + * the respective Device u64 component should be passed > + * back via the val parameter. > + * @count_u64_read Count u64 component read callback. The read value of the > + * respective Count u64 component should be passed back via > + * the val parameter. > + * @signal_u64_read Signal u64 component read callback. The read value of > + * the respective Signal u64 component should be passed > + * back via the val parameter. > + * @action_write Synapse action mode write callback. The write value of > + * the respective Synapse action mode is passed via the > + * action parameter. > + * @device_u8_write Device u8 component write callback. The write value of > + * the respective Device u8 component is passed via the val > + * parameter. > + * @count_u8_write Count u8 component write callback. The write value of > + * the respective Count u8 component is passed via the val > + * parameter. > + * @signal_u8_write Signal u8 component write callback. The write value of > + * the respective Signal u8 component is passed via the val > + * parameter. > + * @device_u32_write Device u32 component write callback. The write value of > + * the respective Device u32 component is passed via the > + * val parameter. > + * @count_u32_write Count u32 component write callback. The write value of > + * the respective Count u32 component is passed via the val > + * parameter. > + * @signal_u32_write Signal u32 component write callback. The write value of > + * the respective Signal u32 component is passed via the > + * val parameter. > + * @device_u64_write Device u64 component write callback. The write value of > + * the respective Device u64 component is passed via the > + * val parameter. > + * @count_u64_write Count u64 component write callback. The write value of > + * the respective Count u64 component is passed via the val > + * parameter. > + * @signal_u64_write Signal u64 component write callback. The write value of > + * the respective Signal u64 component is passed via the > + * val parameter. > */ > -struct counter_signal_ext { > +struct counter_comp { > + enum counter_comp_type type; > const char *name; > - ssize_t (*read)(struct counter_device *counter, > - struct counter_signal *signal, void *priv, char *buf); > - ssize_t (*write)(struct counter_device *counter, > - struct counter_signal *signal, void *priv, > - const char *buf, size_t len); > void *priv; > + union { > + int (*action_read)(struct counter_device *counter, > + struct counter_count *count, > + struct counter_synapse *synapse, > + enum counter_synapse_action *action); > + int (*device_u8_read)(struct counter_device *counter, u8 *val); > + int (*count_u8_read)(struct counter_device *counter, > + struct counter_count *count, u8 *val); > + int (*signal_u8_read)(struct counter_device *counter, > + struct counter_signal *signal, u8 *val); > + int (*device_u32_read)(struct counter_device *counter, > + u32 *val); > + int (*count_u32_read)(struct counter_device *counter, > + struct counter_count *count, u32 *val); > + int (*signal_u32_read)(struct counter_device *counter, > + struct counter_signal *signal, u32 *val); > + int (*device_u64_read)(struct counter_device *counter, > + u64 *val); > + int (*count_u64_read)(struct counter_device *counter, > + struct counter_count *count, u64 *val); > + int (*signal_u64_read)(struct counter_device *counter, > + struct counter_signal *signal, u64 *val); > + }; > + union { > + int (*action_write)(struct counter_device *counter, > + struct counter_count *count, > + struct counter_synapse *synapse, > + enum counter_synapse_action action); > + int (*device_u8_write)(struct counter_device *counter, u8 val); > + int (*count_u8_write)(struct counter_device *counter, > + struct counter_count *count, u8 val); > + int (*signal_u8_write)(struct counter_device *counter, > + struct counter_signal *signal, u8 val); > + int (*device_u32_write)(struct counter_device *counter, > + u32 val); > + int (*count_u32_write)(struct counter_device *counter, > + struct counter_count *count, u32 val); > + int (*signal_u32_write)(struct counter_device *counter, > + struct counter_signal *signal, u32 val); > + int (*device_u64_write)(struct counter_device *counter, > + u64 val); > + int (*count_u64_write)(struct counter_device *counter, > + struct counter_count *count, u64 val); > + int (*signal_u64_write)(struct counter_device *counter, > + struct counter_signal *signal, u64 val); > + }; > }; > > /** > @@ -57,122 +199,23 @@ struct counter_signal { > int id; > const char *name; > > - const struct counter_signal_ext *ext; > + struct counter_comp *ext; > size_t num_ext; > - > - void *priv; > -}; > - > -/** > - * struct counter_signal_enum_ext - Signal enum extension attribute > - * @items: Array of strings > - * @num_items: Number of items specified in @items > - * @set: Set callback function; may be NULL > - * @get: Get callback function; may be NULL > - * > - * The counter_signal_enum_ext structure can be used to implement enum style > - * Signal extension attributes. Enum style attributes are those which have a set > - * of strings that map to unsigned integer values. The Generic Counter Signal > - * enum extension helper code takes care of mapping between value and string, as > - * well as generating a "_available" file which contains a list of all available > - * items. The get callback is used to query the currently active item; the index > - * of the item within the respective items array is returned via the 'item' > - * parameter. The set callback is called when the attribute is updated; the > - * 'item' parameter contains the index of the newly activated item within the > - * respective items array. > - */ > -struct counter_signal_enum_ext { > - const char * const *items; > - size_t num_items; > - int (*get)(struct counter_device *counter, > - struct counter_signal *signal, size_t *item); > - int (*set)(struct counter_device *counter, > - struct counter_signal *signal, size_t item); > -}; > - > -/** > - * COUNTER_SIGNAL_ENUM() - Initialize Signal enum extension > - * @_name: Attribute name > - * @_e: Pointer to a counter_signal_enum_ext structure > - * > - * This should usually be used together with COUNTER_SIGNAL_ENUM_AVAILABLE() > - */ > -#define COUNTER_SIGNAL_ENUM(_name, _e) \ > -{ \ > - .name = (_name), \ > - .read = counter_signal_enum_read, \ > - .write = counter_signal_enum_write, \ > - .priv = (_e) \ > -} > - > -/** > - * COUNTER_SIGNAL_ENUM_AVAILABLE() - Initialize Signal enum available extension > - * @_name: Attribute name ("_available" will be appended to the name) > - * @_e: Pointer to a counter_signal_enum_ext structure > - * > - * Creates a read only attribute that lists all the available enum items in a > - * newline separated list. This should usually be used together with > - * COUNTER_SIGNAL_ENUM() > - */ > -#define COUNTER_SIGNAL_ENUM_AVAILABLE(_name, _e) \ > -{ \ > - .name = (_name "_available"), \ > - .read = counter_signal_enum_available_read, \ > - .priv = (_e) \ > -} > - > -enum counter_synapse_action { > - COUNTER_SYNAPSE_ACTION_NONE = 0, > - COUNTER_SYNAPSE_ACTION_RISING_EDGE, > - COUNTER_SYNAPSE_ACTION_FALLING_EDGE, > - COUNTER_SYNAPSE_ACTION_BOTH_EDGES > }; > > /** > * struct counter_synapse - Counter Synapse node > - * @action: index of current action mode > * @actions_list: array of available action modes > * @num_actions: number of action modes specified in @actions_list > * @signal: pointer to associated signal > */ > struct counter_synapse { > - size_t action; > const enum counter_synapse_action *actions_list; > size_t num_actions; > > struct counter_signal *signal; > }; > > -struct counter_count; > - > -/** > - * struct counter_count_ext - Counter Count extension > - * @name: attribute name > - * @read: read callback for this attribute; may be NULL > - * @write: write callback for this attribute; may be NULL > - * @priv: data private to the driver > - */ > -struct counter_count_ext { > - const char *name; > - ssize_t (*read)(struct counter_device *counter, > - struct counter_count *count, void *priv, char *buf); > - ssize_t (*write)(struct counter_device *counter, > - struct counter_count *count, void *priv, > - const char *buf, size_t len); > - void *priv; > -}; > - > -enum counter_function { > - COUNTER_FUNCTION_INCREASE = 0, > - COUNTER_FUNCTION_DECREASE, > - COUNTER_FUNCTION_PULSE_DIRECTION, > - COUNTER_FUNCTION_QUADRATURE_X1_A, > - COUNTER_FUNCTION_QUADRATURE_X1_B, > - COUNTER_FUNCTION_QUADRATURE_X2_A, > - COUNTER_FUNCTION_QUADRATURE_X2_B, > - COUNTER_FUNCTION_QUADRATURE_X4 > -}; > - > /** > * struct counter_count - Counter Count node > * @id: unique ID used to identify Count > @@ -191,108 +234,14 @@ struct counter_count { > int id; > const char *name; > > - size_t function; > const enum counter_function *functions_list; > size_t num_functions; > > struct counter_synapse *synapses; > size_t num_synapses; > > - const struct counter_count_ext *ext; > + struct counter_comp *ext; > size_t num_ext; > - > - void *priv; > -}; > - > -/** > - * struct counter_count_enum_ext - Count enum extension attribute > - * @items: Array of strings > - * @num_items: Number of items specified in @items > - * @set: Set callback function; may be NULL > - * @get: Get callback function; may be NULL > - * > - * The counter_count_enum_ext structure can be used to implement enum style > - * Count extension attributes. Enum style attributes are those which have a set > - * of strings that map to unsigned integer values. The Generic Counter Count > - * enum extension helper code takes care of mapping between value and string, as > - * well as generating a "_available" file which contains a list of all available > - * items. The get callback is used to query the currently active item; the index > - * of the item within the respective items array is returned via the 'item' > - * parameter. The set callback is called when the attribute is updated; the > - * 'item' parameter contains the index of the newly activated item within the > - * respective items array. > - */ > -struct counter_count_enum_ext { > - const char * const *items; > - size_t num_items; > - int (*get)(struct counter_device *counter, struct counter_count *count, > - size_t *item); > - int (*set)(struct counter_device *counter, struct counter_count *count, > - size_t item); > -}; > - > -/** > - * COUNTER_COUNT_ENUM() - Initialize Count enum extension > - * @_name: Attribute name > - * @_e: Pointer to a counter_count_enum_ext structure > - * > - * This should usually be used together with COUNTER_COUNT_ENUM_AVAILABLE() > - */ > -#define COUNTER_COUNT_ENUM(_name, _e) \ > -{ \ > - .name = (_name), \ > - .read = counter_count_enum_read, \ > - .write = counter_count_enum_write, \ > - .priv = (_e) \ > -} > - > -/** > - * COUNTER_COUNT_ENUM_AVAILABLE() - Initialize Count enum available extension > - * @_name: Attribute name ("_available" will be appended to the name) > - * @_e: Pointer to a counter_count_enum_ext structure > - * > - * Creates a read only attribute that lists all the available enum items in a > - * newline separated list. This should usually be used together with > - * COUNTER_COUNT_ENUM() > - */ > -#define COUNTER_COUNT_ENUM_AVAILABLE(_name, _e) \ > -{ \ > - .name = (_name "_available"), \ > - .read = counter_count_enum_available_read, \ > - .priv = (_e) \ > -} > - > -/** > - * struct counter_device_attr_group - internal container for attribute group > - * @attr_group: Counter sysfs attributes group > - * @attr_list: list to keep track of created Counter sysfs attributes > - * @num_attr: number of Counter sysfs attributes > - */ > -struct counter_device_attr_group { > - struct attribute_group attr_group; > - struct list_head attr_list; > - size_t num_attr; > -}; > - > -/** > - * struct counter_device_state - internal state container for a Counter device > - * @id: unique ID used to identify the Counter > - * @dev: internal device structure > - * @groups_list: attribute groups list (for Signals, Counts, and ext) > - * @num_groups: number of attribute groups containers > - * @groups: Counter sysfs attribute groups (to populate @dev.groups) > - */ > -struct counter_device_state { > - int id; > - struct device dev; > - struct counter_device_attr_group *groups_list; > - size_t num_groups; > - const struct attribute_group **groups; > -}; > - > -enum counter_signal_level { > - COUNTER_SIGNAL_LEVEL_LOW, > - COUNTER_SIGNAL_LEVEL_HIGH, > }; > > /** > @@ -326,97 +275,29 @@ struct counter_ops { > struct counter_signal *signal, > enum counter_signal_level *level); > int (*count_read)(struct counter_device *counter, > - struct counter_count *count, unsigned long *val); > + struct counter_count *count, u64 *value); > int (*count_write)(struct counter_device *counter, > - struct counter_count *count, unsigned long val); > - int (*function_get)(struct counter_device *counter, > - struct counter_count *count, size_t *function); > - int (*function_set)(struct counter_device *counter, > - struct counter_count *count, size_t function); > - int (*action_get)(struct counter_device *counter, > - struct counter_count *count, > - struct counter_synapse *synapse, size_t *action); > - int (*action_set)(struct counter_device *counter, > - struct counter_count *count, > - struct counter_synapse *synapse, size_t action); > -}; > - > -/** > - * struct counter_device_ext - Counter device extension > - * @name: attribute name > - * @read: read callback for this attribute; may be NULL > - * @write: write callback for this attribute; may be NULL > - * @priv: data private to the driver > - */ > -struct counter_device_ext { > - const char *name; > - ssize_t (*read)(struct counter_device *counter, void *priv, char *buf); > - ssize_t (*write)(struct counter_device *counter, void *priv, > - const char *buf, size_t len); > - void *priv; > -}; > - > -/** > - * struct counter_device_enum_ext - Counter enum extension attribute > - * @items: Array of strings > - * @num_items: Number of items specified in @items > - * @set: Set callback function; may be NULL > - * @get: Get callback function; may be NULL > - * > - * The counter_device_enum_ext structure can be used to implement enum style > - * Counter extension attributes. Enum style attributes are those which have a > - * set of strings that map to unsigned integer values. The Generic Counter enum > - * extension helper code takes care of mapping between value and string, as well > - * as generating a "_available" file which contains a list of all available > - * items. The get callback is used to query the currently active item; the index > - * of the item within the respective items array is returned via the 'item' > - * parameter. The set callback is called when the attribute is updated; the > - * 'item' parameter contains the index of the newly activated item within the > - * respective items array. > - */ > -struct counter_device_enum_ext { > - const char * const *items; > - size_t num_items; > - int (*get)(struct counter_device *counter, size_t *item); > - int (*set)(struct counter_device *counter, size_t item); > + struct counter_count *count, u64 value); > + int (*function_read)(struct counter_device *counter, > + struct counter_count *count, > + enum counter_function *function); > + int (*function_write)(struct counter_device *counter, > + struct counter_count *count, > + enum counter_function function); > + int (*action_read)(struct counter_device *counter, > + struct counter_count *count, > + struct counter_synapse *synapse, > + enum counter_synapse_action *action); > + int (*action_write)(struct counter_device *counter, > + struct counter_count *count, > + struct counter_synapse *synapse, > + enum counter_synapse_action action); > }; > > -/** > - * COUNTER_DEVICE_ENUM() - Initialize Counter enum extension > - * @_name: Attribute name > - * @_e: Pointer to a counter_device_enum_ext structure > - * > - * This should usually be used together with COUNTER_DEVICE_ENUM_AVAILABLE() > - */ > -#define COUNTER_DEVICE_ENUM(_name, _e) \ > -{ \ > - .name = (_name), \ > - .read = counter_device_enum_read, \ > - .write = counter_device_enum_write, \ > - .priv = (_e) \ > -} > - > -/** > - * COUNTER_DEVICE_ENUM_AVAILABLE() - Initialize Counter enum available extension > - * @_name: Attribute name ("_available" will be appended to the name) > - * @_e: Pointer to a counter_device_enum_ext structure > - * > - * Creates a read only attribute that lists all the available enum items in a > - * newline separated list. This should usually be used together with > - * COUNTER_DEVICE_ENUM() > - */ > -#define COUNTER_DEVICE_ENUM_AVAILABLE(_name, _e) \ > -{ \ > - .name = (_name "_available"), \ > - .read = counter_device_enum_available_read, \ > - .priv = (_e) \ > -} > - > /** > * struct counter_device - Counter data structure > * @name: name of the device as it appears in the datasheet > * @parent: optional parent device providing the counters > - * @device_state: internal device state container > * @ops: callbacks from driver > * @signals: array of Signals > * @num_signals: number of Signals specified in @signals > @@ -425,11 +306,11 @@ struct counter_device_enum_ext { > * @ext: optional array of Counter device extensions > * @num_ext: number of Counter device extensions specified in @ext > * @priv: optional private data supplied by driver > + * @dev: internal device structure > */ > struct counter_device { > const char *name; > struct device *parent; > - struct counter_device_state *device_state; > > const struct counter_ops *ops; > > @@ -438,17 +319,159 @@ struct counter_device { > struct counter_count *counts; > size_t num_counts; > > - const struct counter_device_ext *ext; > + struct counter_comp *ext; > size_t num_ext; > > void *priv; > + > + struct device dev; > }; > > int counter_register(struct counter_device *const counter); > void counter_unregister(struct counter_device *const counter); > int devm_counter_register(struct device *dev, > struct counter_device *const counter); > -void devm_counter_unregister(struct device *dev, > - struct counter_device *const counter); > + > +#define COUNTER_COMP_DEVICE_U8(_name, _read, _write) \ > +{ \ > + .type = COUNTER_COMP_U8, \ > + .name = (_name), \ > + .device_u8_read = (_read), \ > + .device_u8_write = (_write), \ > +} > +#define COUNTER_COMP_COUNT_U8(_name, _read, _write) \ > +{ \ > + .type = COUNTER_COMP_U8, \ > + .name = (_name), \ > + .count_u8_read = (_read), \ > + .count_u8_write = (_write), \ > +} > +#define COUNTER_COMP_SIGNAL_U8(_name, _read, _write) \ > +{ \ > + .type = COUNTER_COMP_U8, \ > + .name = (_name), \ > + .signal_u8_read = (_read), \ > + .signal_u8_write = (_write), \ > +} > + > +#define COUNTER_COMP_DEVICE_U64(_name, _read, _write) \ > +{ \ > + .type = COUNTER_COMP_U64, \ > + .name = (_name), \ > + .device_u64_read = (_read), \ > + .device_u64_write = (_write), \ > +} > +#define COUNTER_COMP_COUNT_U64(_name, _read, _write) \ > +{ \ > + .type = COUNTER_COMP_U64, \ > + .name = (_name), \ > + .count_u64_read = (_read), \ > + .count_u64_write = (_write), \ > +} > +#define COUNTER_COMP_SIGNAL_U64(_name, _read, _write) \ > +{ \ > + .type = COUNTER_COMP_U64, \ > + .name = (_name), \ > + .signal_u64_read = (_read), \ > + .signal_u64_write = (_write), \ > +} > + > +#define COUNTER_COMP_DEVICE_BOOL(_name, _read, _write) \ > +{ \ > + .type = COUNTER_COMP_BOOL, \ > + .name = (_name), \ > + .device_u8_read = (_read), \ > + .device_u8_write = (_write), \ > +} > +#define COUNTER_COMP_COUNT_BOOL(_name, _read, _write) \ > +{ \ > + .type = COUNTER_COMP_BOOL, \ > + .name = (_name), \ > + .count_u8_read = (_read), \ > + .count_u8_write = (_write), \ > +} > +#define COUNTER_COMP_SIGNAL_BOOL(_name, _read, _write) \ > +{ \ > + .type = COUNTER_COMP_BOOL, \ > + .name = (_name), \ > + .signal_u8_read = (_read), \ > + .signal_u8_write = (_write), \ > +} > + > +struct counter_available { > + union { > + const u32 *enums; > + const char *const *strs; > + }; > + size_t num_items; > +}; > + > +#define DEFINE_COUNTER_AVAILABLE(_name, _enums) \ > + struct counter_available _name = { \ > + .enums = (_enums), \ > + .num_items = ARRAY_SIZE(_enums), \ > + } > + > +#define DEFINE_COUNTER_ENUM(_name, _strs) \ > + struct counter_available _name = { \ > + .strs = (_strs), \ > + .num_items = ARRAY_SIZE(_strs), \ > + } > + > +#define COUNTER_COMP_DEVICE_ENUM(_name, _get, _set, _available) \ > +{ \ > + .type = COUNTER_COMP_ENUM, \ > + .name = (_name), \ > + .device_u32_read = (_get), \ > + .device_u32_write = (_set), \ > + .priv = &(_available), \ > +} > +#define COUNTER_COMP_COUNT_ENUM(_name, _get, _set, _available) \ > +{ \ > + .type = COUNTER_COMP_ENUM, \ > + .name = (_name), \ > + .count_u32_read = (_get), \ > + .count_u32_write = (_set), \ > + .priv = &(_available), \ > +} > +#define COUNTER_COMP_SIGNAL_ENUM(_name, _get, _set, _available) \ > +{ \ > + .type = COUNTER_COMP_ENUM, \ > + .name = (_name), \ > + .signal_u32_read = (_get), \ > + .signal_u32_write = (_set), \ > + .priv = &(_available), \ > +} > + > +#define COUNTER_COMP_CEILING(_read, _write) \ > + COUNTER_COMP_COUNT_U64("ceiling", _read, _write) > + > +#define COUNTER_COMP_COUNT_MODE(_read, _write, _available) \ > +{ \ > + .type = COUNTER_COMP_COUNT_MODE, \ > + .name = "count_mode", \ > + .count_u32_read = (_read), \ > + .count_u32_write = (_write), \ > + .priv = &(_available), \ > +} > + > +#define COUNTER_COMP_DIRECTION(_read) \ > +{ \ > + .type = COUNTER_COMP_COUNT_DIRECTION, \ > + .name = "direction", \ > + .count_u32_read = (_read), \ > +} > + > +#define COUNTER_COMP_ENABLE(_read, _write) \ > + COUNTER_COMP_COUNT_BOOL("enable", _read, _write) > + > +#define COUNTER_COMP_FLOOR(_read, _write) \ > + COUNTER_COMP_COUNT_U64("floor", _read, _write) > + > +#define COUNTER_COMP_PRESET(_read, _write) \ > + COUNTER_COMP_COUNT_U64("preset", _read, _write) > + > +#define COUNTER_COMP_PRESET_ENABLE(_read, _write) \ > + COUNTER_COMP_COUNT_BOOL("preset_enable", _read, _write) > > #endif /* _COUNTER_H_ */ > diff --git a/include/linux/counter_enum.h b/include/linux/counter_enum.h > deleted file mode 100644 > index 9f917298a88f..000000000000 > --- a/include/linux/counter_enum.h > +++ /dev/null > @@ -1,45 +0,0 @@ > -/* SPDX-License-Identifier: GPL-2.0 */ > -/* > - * Counter interface enum functions > - * Copyright (C) 2018 William Breathitt Gray > - */ > -#ifndef _COUNTER_ENUM_H_ > -#define _COUNTER_ENUM_H_ > - > -#include > - > -struct counter_device; > -struct counter_signal; > -struct counter_count; > - > -ssize_t counter_signal_enum_read(struct counter_device *counter, > - struct counter_signal *signal, void *priv, > - char *buf); > -ssize_t counter_signal_enum_write(struct counter_device *counter, > - struct counter_signal *signal, void *priv, > - const char *buf, size_t len); > - > -ssize_t counter_signal_enum_available_read(struct counter_device *counter, > - struct counter_signal *signal, > - void *priv, char *buf); > - > -ssize_t counter_count_enum_read(struct counter_device *counter, > - struct counter_count *count, void *priv, > - char *buf); > -ssize_t counter_count_enum_write(struct counter_device *counter, > - struct counter_count *count, void *priv, > - const char *buf, size_t len); > - > -ssize_t counter_count_enum_available_read(struct counter_device *counter, > - struct counter_count *count, > - void *priv, char *buf); > - > -ssize_t counter_device_enum_read(struct counter_device *counter, void *priv, > - char *buf); > -ssize_t counter_device_enum_write(struct counter_device *counter, void *priv, > - const char *buf, size_t len); > - > -ssize_t counter_device_enum_available_read(struct counter_device *counter, > - void *priv, char *buf); > - > -#endif /* _COUNTER_ENUM_H_ */ > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel