rtc-opal.c (6dc1cf6f932bb0ea4d8f5e913a0a401ecacd2f03) rtc-opal.c (0ec7769a98b00866e37740328d65cba6594d178d)
1/*
2 * IBM OPAL RTC driver
3 * Copyright (C) 2014 IBM
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.

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162/* Set Timed Power-On */
163static int opal_set_tpo_time(struct device *dev, struct rtc_wkalrm *alarm)
164{
165 u64 h_m_s_ms = 0;
166 struct opal_msg msg;
167 u32 y_m_d = 0;
168 int token, rc;
169
1/*
2 * IBM OPAL RTC driver
3 * Copyright (C) 2014 IBM
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.

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162/* Set Timed Power-On */
163static int opal_set_tpo_time(struct device *dev, struct rtc_wkalrm *alarm)
164{
165 u64 h_m_s_ms = 0;
166 struct opal_msg msg;
167 u32 y_m_d = 0;
168 int token, rc;
169
170 tm_to_opal(&alarm->time, &y_m_d, &h_m_s_ms);
170 /* if alarm is enabled */
171 if (alarm->enabled) {
172 tm_to_opal(&alarm->time, &y_m_d, &h_m_s_ms);
173 pr_debug("Alarm set to %x %llx\n", y_m_d, h_m_s_ms);
171
174
175 } else {
176 pr_debug("Alarm getting disabled\n");
177 }
178
172 token = opal_async_get_token_interruptible();
173 if (token < 0) {
174 if (token != -ERESTARTSYS)
175 pr_err("Failed to get the async token\n");
176
177 return token;
178 }
179

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195 if (rc != OPAL_SUCCESS)
196 rc = -EIO;
197
198exit:
199 opal_async_release_token(token);
200 return rc;
201}
202
179 token = opal_async_get_token_interruptible();
180 if (token < 0) {
181 if (token != -ERESTARTSYS)
182 pr_err("Failed to get the async token\n");
183
184 return token;
185 }
186

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202 if (rc != OPAL_SUCCESS)
203 rc = -EIO;
204
205exit:
206 opal_async_release_token(token);
207 return rc;
208}
209
210int opal_tpo_alarm_irq_enable(struct device *dev, unsigned int enabled)
211{
212 struct rtc_wkalrm alarm = { .enabled = 0 };
213
214 /*
215 * TPO is automatically enabled when opal_set_tpo_time() is called with
216 * non-zero rtc-time. We only handle disable case which needs to be
217 * explicitly told to opal.
218 */
219 return enabled ? 0 : opal_set_tpo_time(dev, &alarm);
220}
221
203static struct rtc_class_ops opal_rtc_ops = {
204 .read_time = opal_get_rtc_time,
205 .set_time = opal_set_rtc_time,
206};
207
208static int opal_rtc_probe(struct platform_device *pdev)
209{
210 struct rtc_device *rtc;
211
212 if (pdev->dev.of_node &&
213 (of_property_read_bool(pdev->dev.of_node, "wakeup-source") ||
214 of_property_read_bool(pdev->dev.of_node, "has-tpo")/* legacy */)) {
215 device_set_wakeup_capable(&pdev->dev, true);
216 opal_rtc_ops.read_alarm = opal_get_tpo_time;
217 opal_rtc_ops.set_alarm = opal_set_tpo_time;
222static struct rtc_class_ops opal_rtc_ops = {
223 .read_time = opal_get_rtc_time,
224 .set_time = opal_set_rtc_time,
225};
226
227static int opal_rtc_probe(struct platform_device *pdev)
228{
229 struct rtc_device *rtc;
230
231 if (pdev->dev.of_node &&
232 (of_property_read_bool(pdev->dev.of_node, "wakeup-source") ||
233 of_property_read_bool(pdev->dev.of_node, "has-tpo")/* legacy */)) {
234 device_set_wakeup_capable(&pdev->dev, true);
235 opal_rtc_ops.read_alarm = opal_get_tpo_time;
236 opal_rtc_ops.set_alarm = opal_set_tpo_time;
237 opal_rtc_ops.alarm_irq_enable = opal_tpo_alarm_irq_enable;
218 }
219
220 rtc = devm_rtc_device_register(&pdev->dev, DRVNAME, &opal_rtc_ops,
221 THIS_MODULE);
222 if (IS_ERR(rtc))
223 return PTR_ERR(rtc);
224
225 rtc->uie_unsupported = 1;

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239
240 rtc = devm_rtc_device_register(&pdev->dev, DRVNAME, &opal_rtc_ops,
241 THIS_MODULE);
242 if (IS_ERR(rtc))
243 return PTR_ERR(rtc);
244
245 rtc->uie_unsupported = 1;

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