tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
master
head: 0072a0c14d5b7cb72c611d396f143f5dcd73ebe2
commit: b04e68d16605dcde1c21b5df5f86a5372e53ae97 mfd: madera: Don't use
regmap_read_poll_timeout to poll for BOOT_DONE
date: 6 weeks ago
coccinelle warnings: (new ones prefixed by >>)
>> drivers/mfd/madera-core.c:158:2-3: Unneeded semicolon
vim +158 drivers/mfd/madera-core.c
137
138 static int madera_wait_for_boot(struct madera *madera)
139 {
140 ktime_t timeout;
141 unsigned int val;
142 int ret = 0;
143
144 /*
145 * We can't use an interrupt as we need to runtime resume to do
so,
146 * so we poll the status bit. This won't race with the interrupt
147 * handler because it will be blocked on runtime resume.
148 * The chip could NAK a read request while it is booting so
ignore
149 * errors from regmap_read.
150 */
151 timeout = ktime_add_us(ktime_get(),
MADERA_BOOT_POLL_TIMEOUT_USEC);
152 regmap_read(madera->regmap, MADERA_IRQ1_RAW_STATUS_1, &val);
153 while (!(val & MADERA_BOOT_DONE_STS1) &&
154 !ktime_after(ktime_get(), timeout)) {
155 usleep_range(MADERA_BOOT_POLL_INTERVAL_USEC / 2,
156 MADERA_BOOT_POLL_INTERVAL_USEC);
157 regmap_read(madera->regmap, MADERA_IRQ1_RAW_STATUS_1,
&val);
> 158 };
159
160 if (!(val & MADERA_BOOT_DONE_STS1)) {
161 dev_err(madera->dev, "Polling BOOT_DONE_STS timed
out\n");
162 ret = -ETIMEDOUT;
163 }
164
165 /*
166 * BOOT_DONE defaults to unmasked on boot so we must ack it.
167 * Do this even after a timeout to avoid interrupt storms.
168 */
169 regmap_write(madera->regmap, MADERA_IRQ1_STATUS_1,
170 MADERA_BOOT_DONE_EINT1);
171
172 pm_runtime_mark_last_busy(madera->dev);
173
174 return ret;
175 }
176
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