^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* NXP PCF50633 ADC Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * (C) 2006-2008 by Openmoko, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author: Balaji Rao <balajirrao@openmoko.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Broken down from monstrous PCF50633 driver mainly by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Harald Welte, Andy Green and Werner Almesberger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * NOTE: This driver does not yet support subtractive ADC mode, which means
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * you can do only one measurement per read request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mfd/pcf50633/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/mfd/pcf50633/adc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct pcf50633_adc_request {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int mux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int avg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) void (*callback)(struct pcf50633 *, void *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) void *callback_param;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct pcf50633_adc_sync_request {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct completion completion;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define PCF50633_MAX_ADC_FIFO_DEPTH 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct pcf50633_adc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct pcf50633 *pcf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* Private stuff */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct pcf50633_adc_request *queue[PCF50633_MAX_ADC_FIFO_DEPTH];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) int queue_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int queue_tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct mutex queue_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static inline struct pcf50633_adc *__to_adc(struct pcf50633 *pcf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return platform_get_drvdata(pcf->adc_pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void adc_setup(struct pcf50633 *pcf, int channel, int avg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) channel &= PCF50633_ADCC1_ADCMUX_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* kill ratiometric, but enable ACCSW biasing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) pcf50633_reg_write(pcf, PCF50633_REG_ADCC2, 0x00);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) pcf50633_reg_write(pcf, PCF50633_REG_ADCC3, 0x01);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* start ADC conversion on selected channel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) pcf50633_reg_write(pcf, PCF50633_REG_ADCC1, channel | avg |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) PCF50633_ADCC1_ADCSTART | PCF50633_ADCC1_RES_10BIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static void trigger_next_adc_job_if_any(struct pcf50633 *pcf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct pcf50633_adc *adc = __to_adc(pcf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) int head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) head = adc->queue_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (!adc->queue[head])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) adc_setup(pcf, adc->queue[head]->mux, adc->queue[head]->avg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) adc_enqueue_request(struct pcf50633 *pcf, struct pcf50633_adc_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct pcf50633_adc *adc = __to_adc(pcf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int head, tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) mutex_lock(&adc->queue_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) head = adc->queue_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) tail = adc->queue_tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (adc->queue[tail]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) mutex_unlock(&adc->queue_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) dev_err(pcf->dev, "ADC queue is full, dropping request\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) adc->queue[tail] = req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (head == tail)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) trigger_next_adc_job_if_any(pcf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) adc->queue_tail = (tail + 1) & (PCF50633_MAX_ADC_FIFO_DEPTH - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) mutex_unlock(&adc->queue_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static void pcf50633_adc_sync_read_callback(struct pcf50633 *pcf, void *param,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct pcf50633_adc_sync_request *req = param;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) req->result = result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) complete(&req->completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int pcf50633_adc_sync_read(struct pcf50633 *pcf, int mux, int avg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct pcf50633_adc_sync_request req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) init_completion(&req.completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) ret = pcf50633_adc_async_read(pcf, mux, avg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) pcf50633_adc_sync_read_callback, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) wait_for_completion(&req.completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return req.result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) EXPORT_SYMBOL_GPL(pcf50633_adc_sync_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) int pcf50633_adc_async_read(struct pcf50633 *pcf, int mux, int avg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) void (*callback)(struct pcf50633 *, void *, int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) void *callback_param)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct pcf50633_adc_request *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* req is freed when the result is ready, in interrupt handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) req = kmalloc(sizeof(*req), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (!req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) req->mux = mux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) req->avg = avg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) req->callback = callback;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) req->callback_param = callback_param;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return adc_enqueue_request(pcf, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) EXPORT_SYMBOL_GPL(pcf50633_adc_async_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static int adc_result(struct pcf50633 *pcf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) u8 adcs1, adcs3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) u16 result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) adcs1 = pcf50633_reg_read(pcf, PCF50633_REG_ADCS1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) adcs3 = pcf50633_reg_read(pcf, PCF50633_REG_ADCS3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) result = (adcs1 << 2) | (adcs3 & PCF50633_ADCS3_ADCDAT1L_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) dev_dbg(pcf->dev, "adc result = %d\n", result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static void pcf50633_adc_irq(int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct pcf50633_adc *adc = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) struct pcf50633 *pcf = adc->pcf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) struct pcf50633_adc_request *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) int head, res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) mutex_lock(&adc->queue_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) head = adc->queue_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) req = adc->queue[head];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (WARN_ON(!req)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) dev_err(pcf->dev, "pcf50633-adc irq: ADC queue empty!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) mutex_unlock(&adc->queue_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) adc->queue[head] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) adc->queue_head = (head + 1) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) (PCF50633_MAX_ADC_FIFO_DEPTH - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) res = adc_result(pcf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) trigger_next_adc_job_if_any(pcf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) mutex_unlock(&adc->queue_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) req->callback(pcf, req->callback_param, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) kfree(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static int pcf50633_adc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct pcf50633_adc *adc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) adc = devm_kzalloc(&pdev->dev, sizeof(*adc), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (!adc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) adc->pcf = dev_to_pcf50633(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) platform_set_drvdata(pdev, adc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) pcf50633_register_irq(adc->pcf, PCF50633_IRQ_ADCRDY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) pcf50633_adc_irq, adc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) mutex_init(&adc->queue_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static int pcf50633_adc_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) struct pcf50633_adc *adc = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) int i, head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) pcf50633_free_irq(adc->pcf, PCF50633_IRQ_ADCRDY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) mutex_lock(&adc->queue_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) head = adc->queue_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (WARN_ON(adc->queue[head]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) dev_err(adc->pcf->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) "adc driver removed with request pending\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) for (i = 0; i < PCF50633_MAX_ADC_FIFO_DEPTH; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) kfree(adc->queue[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) mutex_unlock(&adc->queue_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static struct platform_driver pcf50633_adc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) .name = "pcf50633-adc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) .probe = pcf50633_adc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) .remove = pcf50633_adc_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) module_platform_driver(pcf50633_adc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) MODULE_DESCRIPTION("PCF50633 adc driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) MODULE_ALIAS("platform:pcf50633-adc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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