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Message-ID: <20180731081013.GS28585@piout.net>
Date: Tue, 31 Jul 2018 10:10:13 +0200
From: Alexandre Belloni <alexandre.belloni@...tlin.com>
To: Tony Xie <tony.xie@...k-chips.com>
Cc: heiko@...ech.de, broonie@...nel.org, lee.jones@...aro.org,
a.zummo@...ertech.it, sboyd@...nel.org, linux-clk@...r.kernel.org,
linux-rtc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, chenjh@...k-chips.com,
xsf@...k-chips.com, zhangqing@...k-chips.com,
huangtao@...k-chips.com
Subject: Re: [PATCH v2 4/5] RTC: RK808: add RK809 and RK817 support.
Hi,
I insist this must be a lowercase "rtc: rk808:". There has not been a
single upper case RTC in a subject since 2011.
On 31/07/2018 15:57:29+0800, Tony Xie wrote:
> RK809 and RK817 are power management IC chips for multimedia products.
> Most of their functions and registers are same, including the rtc.
>
> Signed-off-by: Tony Xie <tony.xie@...k-chips.com>
> ---
> drivers/rtc/Kconfig | 4 +--
> drivers/rtc/rtc-rk808.c | 68 +++++++++++++++++++++++++++++++++++++++----------
> 2 files changed, 56 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> index a2ba5db..1aaf935 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -371,11 +371,11 @@ config RTC_DRV_MAX77686
> will be called rtc-max77686.
>
> config RTC_DRV_RK808
> - tristate "Rockchip RK805/RK808/RK818 RTC"
> + tristate "Rockchip RK805/RK808/RK809/RK817/RK818 RTC"
> depends on MFD_RK808
> help
> If you say yes here you will get support for the
> - RTC of RK805, RK808 and RK818 PMIC.
> + RTC of RK805, RK809 and RK817, RK808 and RK818 PMIC.
>
> This driver can also be built as a module. If so, the module
> will be called rk808-rtc.
> diff --git a/drivers/rtc/rtc-rk808.c b/drivers/rtc/rtc-rk808.c
> index 739c0d4..5bacdaf 100644
> --- a/drivers/rtc/rtc-rk808.c
> +++ b/drivers/rtc/rtc-rk808.c
> @@ -50,9 +50,18 @@
> #define NUM_TIME_REGS (RK808_WEEKS_REG - RK808_SECONDS_REG + 1)
> #define NUM_ALARM_REGS (RK808_ALARM_YEARS_REG - RK808_ALARM_SECONDS_REG + 1)
>
> +struct rk_rtc_compat_reg {
> + unsigned int ctrl_reg;
> + unsigned int status_reg;
> + unsigned int alarm_seconds_reg;
> + unsigned int int_reg;
> + unsigned int seconds_reg;
> +};
> +
> struct rk808_rtc {
> struct rk808 *rk808;
> struct rtc_device *rtc;
> + struct rk_rtc_compat_reg *creg;
> int irq;
> };
>
> @@ -101,7 +110,7 @@ static int rk808_rtc_readtime(struct device *dev, struct rtc_time *tm)
> int ret;
>
> /* Force an update of the shadowed registers right now */
> - ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
> + ret = regmap_update_bits(rk808->regmap, rk808_rtc->creg->ctrl_reg,
> BIT_RTC_CTRL_REG_RTC_GET_TIME,
> BIT_RTC_CTRL_REG_RTC_GET_TIME);
> if (ret) {
> @@ -115,7 +124,7 @@ static int rk808_rtc_readtime(struct device *dev, struct rtc_time *tm)
> * 32khz. If we clear the GET_TIME bit here, the time of i2c transfer
> * certainly more than 31.25us: 16 * 2.5us at 400kHz bus frequency.
> */
> - ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
> + ret = regmap_update_bits(rk808->regmap, rk808_rtc->creg->ctrl_reg,
> BIT_RTC_CTRL_REG_RTC_GET_TIME,
> 0);
> if (ret) {
> @@ -123,7 +132,7 @@ static int rk808_rtc_readtime(struct device *dev, struct rtc_time *tm)
> return ret;
> }
>
> - ret = regmap_bulk_read(rk808->regmap, RK808_SECONDS_REG,
> + ret = regmap_bulk_read(rk808->regmap, rk808_rtc->creg->seconds_reg,
> rtc_data, NUM_TIME_REGS);
> if (ret) {
> dev_err(dev, "Failed to bulk read rtc_data: %d\n", ret);
> @@ -166,7 +175,7 @@ static int rk808_rtc_set_time(struct device *dev, struct rtc_time *tm)
> rtc_data[6] = bin2bcd(tm->tm_wday);
>
> /* Stop RTC while updating the RTC registers */
> - ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
> + ret = regmap_update_bits(rk808->regmap, rk808_rtc->creg->ctrl_reg,
> BIT_RTC_CTRL_REG_STOP_RTC_M,
> BIT_RTC_CTRL_REG_STOP_RTC_M);
> if (ret) {
> @@ -174,14 +183,14 @@ static int rk808_rtc_set_time(struct device *dev, struct rtc_time *tm)
> return ret;
> }
>
> - ret = regmap_bulk_write(rk808->regmap, RK808_SECONDS_REG,
> + ret = regmap_bulk_write(rk808->regmap, rk808_rtc->creg->seconds_reg,
> rtc_data, NUM_TIME_REGS);
> if (ret) {
> dev_err(dev, "Failed to bull write rtc_data: %d\n", ret);
> return ret;
> }
> /* Start RTC again */
> - ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
> + ret = regmap_update_bits(rk808->regmap, rk808_rtc->creg->ctrl_reg,
> BIT_RTC_CTRL_REG_STOP_RTC_M, 0);
> if (ret) {
> dev_err(dev, "Failed to update RTC control: %d\n", ret);
> @@ -199,8 +208,13 @@ static int rk808_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
> uint32_t int_reg;
> int ret;
>
> - ret = regmap_bulk_read(rk808->regmap, RK808_ALARM_SECONDS_REG,
> + ret = regmap_bulk_read(rk808->regmap,
> + rk808_rtc->creg->alarm_seconds_reg,
> alrm_data, NUM_ALARM_REGS);
> + if (ret) {
> + dev_err(dev, "Failed to read RTC alarm date REG: %d\n", ret);
> + return ret;
> + }
>
> alrm->time.tm_sec = bcd2bin(alrm_data[0] & SECONDS_REG_MSK);
> alrm->time.tm_min = bcd2bin(alrm_data[1] & MINUTES_REG_MAK);
> @@ -210,7 +224,7 @@ static int rk808_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
> alrm->time.tm_year = (bcd2bin(alrm_data[5] & YEARS_REG_MSK)) + 100;
> rockchip_to_gregorian(&alrm->time);
>
> - ret = regmap_read(rk808->regmap, RK808_RTC_INT_REG, &int_reg);
> + ret = regmap_read(rk808->regmap, rk808_rtc->creg->int_reg, &int_reg);
> if (ret) {
> dev_err(dev, "Failed to read RTC INT REG: %d\n", ret);
> return ret;
> @@ -231,7 +245,7 @@ static int rk808_rtc_stop_alarm(struct rk808_rtc *rk808_rtc)
> struct rk808 *rk808 = rk808_rtc->rk808;
> int ret;
>
> - ret = regmap_update_bits(rk808->regmap, RK808_RTC_INT_REG,
> + ret = regmap_update_bits(rk808->regmap, rk808_rtc->creg->int_reg,
> BIT_RTC_INTERRUPTS_REG_IT_ALARM_M, 0);
>
> return ret;
> @@ -242,7 +256,7 @@ static int rk808_rtc_start_alarm(struct rk808_rtc *rk808_rtc)
> struct rk808 *rk808 = rk808_rtc->rk808;
> int ret;
>
> - ret = regmap_update_bits(rk808->regmap, RK808_RTC_INT_REG,
> + ret = regmap_update_bits(rk808->regmap, rk808_rtc->creg->int_reg,
> BIT_RTC_INTERRUPTS_REG_IT_ALARM_M,
> BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
>
> @@ -274,7 +288,8 @@ static int rk808_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
> alrm_data[4] = bin2bcd(alrm->time.tm_mon + 1);
> alrm_data[5] = bin2bcd(alrm->time.tm_year - 100);
>
> - ret = regmap_bulk_write(rk808->regmap, RK808_ALARM_SECONDS_REG,
> + ret = regmap_bulk_write(rk808->regmap,
> + rk808_rtc->creg->alarm_seconds_reg,
> alrm_data, NUM_ALARM_REGS);
> if (ret) {
> dev_err(dev, "Failed to bulk write: %d\n", ret);
> @@ -318,7 +333,7 @@ static irqreturn_t rk808_alarm_irq(int irq, void *data)
> struct i2c_client *client = rk808->i2c;
> int ret;
>
> - ret = regmap_write(rk808->regmap, RK808_RTC_STATUS_REG,
> + ret = regmap_write(rk808->regmap, rk808_rtc->creg->status_reg,
> RTC_STATUS_MASK);
> if (ret) {
> dev_err(&client->dev,
> @@ -371,6 +386,22 @@ static int rk808_rtc_resume(struct device *dev)
> static SIMPLE_DEV_PM_OPS(rk808_rtc_pm_ops,
> rk808_rtc_suspend, rk808_rtc_resume);
>
> +static struct rk_rtc_compat_reg rk808_creg = {
> + .ctrl_reg = RK808_RTC_CTRL_REG,
> + .status_reg = RK808_RTC_STATUS_REG,
> + .alarm_seconds_reg = RK808_ALARM_SECONDS_REG,
> + .int_reg = RK808_RTC_INT_REG,
> + .seconds_reg = RK808_SECONDS_REG,
> +};
> +
> +static struct rk_rtc_compat_reg rk817_creg = {
> + .ctrl_reg = RK817_RTC_CTRL_REG,
> + .status_reg = RK817_RTC_STATUS_REG,
> + .alarm_seconds_reg = RK817_ALARM_SECONDS_REG,
> + .int_reg = RK817_RTC_INT_REG,
> + .seconds_reg = RK817_SECONDS_REG,
> +};
> +
> static int rk808_rtc_probe(struct platform_device *pdev)
> {
> struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
> @@ -381,11 +412,20 @@ static int rk808_rtc_probe(struct platform_device *pdev)
> if (rk808_rtc == NULL)
> return -ENOMEM;
>
> + switch (rk808->variant) {
> + case RK809_ID:
> + case RK817_ID:
> + rk808_rtc->creg = &rk817_creg;
> + break;
> + default:
> + rk808_rtc->creg = &rk808_creg;
> + break;
> + }
> platform_set_drvdata(pdev, rk808_rtc);
> rk808_rtc->rk808 = rk808;
>
> /* start rtc running by default, and use shadowed timer. */
> - ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
> + ret = regmap_update_bits(rk808->regmap, rk808_rtc->creg->ctrl_reg,
> BIT_RTC_CTRL_REG_STOP_RTC_M |
> BIT_RTC_CTRL_REG_RTC_READSEL_M,
> BIT_RTC_CTRL_REG_RTC_READSEL_M);
> @@ -395,7 +435,7 @@ static int rk808_rtc_probe(struct platform_device *pdev)
> return ret;
> }
>
> - ret = regmap_write(rk808->regmap, RK808_RTC_STATUS_REG,
> + ret = regmap_write(rk808->regmap, rk808_rtc->creg->status_reg,
> RTC_STATUS_MASK);
> if (ret) {
> dev_err(&pdev->dev,
> --
> 1.9.1
>
>
--
Alexandre Belloni, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
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