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Commit 8c4a4467 authored by Alexandre Belloni's avatar Alexandre Belloni
Browse files

rtc: rx8025: reset validity when setting time 



Wait for the user to set the time to reset the validity bits. Until then,
the time may be invalid.

Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
parent a27c7bf6

drivers/rtc/rtc-rx8025.c

+20 −11
Original line number Diff line number Diff line
@@ -104,6 +104,19 @@ static s32 rx8025_write_regs(const struct i2c_client *client, 
					      length, values);

}



static int rx8025_reset_validity(struct i2c_client *client)

{

	int ctrl2 = rx8025_read_reg(client, RX8025_REG_CTRL2);



	if (ctrl2 < 0)

		return ctrl2;



	ctrl2 &= ~(RX8025_BIT_CTRL2_PON | RX8025_BIT_CTRL2_VDET);



	return rx8025_write_reg(client, RX8025_REG_CTRL2,

				ctrl2 | RX8025_BIT_CTRL2_XST);

}



static irqreturn_t rx8025_handle_irq(int irq, void *dev_id)

{

	struct i2c_client *client = dev_id;
@@ -133,10 +146,6 @@ static irqreturn_t rx8025_handle_irq(int irq, void *dev_id) 
		rtc_update_irq(rx8025->rtc, 1, RTC_AF | RTC_IRQF);

	}



	/* acknowledge IRQ */

	rx8025_write_reg(client, RX8025_REG_CTRL2,

			 status | RX8025_BIT_CTRL2_XST);



out:

	return IRQ_HANDLED;

}
@@ -193,6 +202,7 @@ static int rx8025_set_time(struct device *dev, struct rtc_time *dt) 
{

	struct rx8025_data *rx8025 = dev_get_drvdata(dev);

	u8 date[7];

	int ret;



	if ((dt->tm_year < 100) || (dt->tm_year > 199))

		return -EINVAL;
@@ -219,7 +229,11 @@ static int rx8025_set_time(struct device *dev, struct rtc_time *dt) 
		__func__,

		date[0], date[1], date[2], date[3], date[4], date[5], date[6]);



	return rx8025_write_regs(rx8025->client, RX8025_REG_SEC, 7, date);

	ret = rx8025_write_regs(rx8025->client, RX8025_REG_SEC, 7, date);

	if (ret < 0)

		return ret;



	return rx8025_reset_validity(rx8025->client);

}



static int rx8025_init_client(struct i2c_client *client)
@@ -239,19 +253,16 @@ static int rx8025_init_client(struct i2c_client *client) 
	if (ctrl[1] & RX8025_BIT_CTRL2_PON) {

		dev_warn(&client->dev, "power-on reset was detected, "

			 "you may have to readjust the clock\n");

		need_clear = 1;

	}



	if (ctrl[1] & RX8025_BIT_CTRL2_VDET) {

		dev_warn(&client->dev, "a power voltage drop was detected, "

			 "you may have to readjust the clock\n");

		need_clear = 1;

	}



	if (!(ctrl[1] & RX8025_BIT_CTRL2_XST)) {

		dev_warn(&client->dev, "Oscillation stop was detected,"

			 "you may have to readjust the clock\n");

		need_clear = 1;

	}



	if (ctrl[1] & (RX8025_BIT_CTRL2_DAFG | RX8025_BIT_CTRL2_WAFG)) {
@@ -264,10 +275,8 @@ static int rx8025_init_client(struct i2c_client *client) 


	if (need_clear) {

		ctrl2 = ctrl[1];

		ctrl2 &= ~(RX8025_BIT_CTRL2_PON | RX8025_BIT_CTRL2_VDET |

			   RX8025_BIT_CTRL2_CTFG | RX8025_BIT_CTRL2_WAFG |

		ctrl2 &= ~(RX8025_BIT_CTRL2_CTFG | RX8025_BIT_CTRL2_WAFG |

			   RX8025_BIT_CTRL2_DAFG);

		ctrl2 |= RX8025_BIT_CTRL2_XST;



		err = rx8025_write_reg(client, RX8025_REG_CTRL2, ctrl2);

	}