[U-Boot] [PATCH v3 2/3] rtc: pl031: convert the driver to driver model
Heinrich Schuchardt
xypron.glpk at gmx.de
Tue Sep 4 17:18:18 UTC 2018
On 07/23/2018 09:17 AM, AKASHI Takahiro wrote:
> On Sat, Jul 21, 2018 at 06:53:16AM +0200, Heinrich Schuchardt wrote:
>> On 07/11/2018 11:06 AM, AKASHI Takahiro wrote:
>>> With this patch, PL031 driver is converted to driver-model-compliant
>>> driver. In addition, CONFIG_SYS_RTC_PL031_BASE is no longer valid.
>>>
>>> Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
>>> ---
>>> drivers/rtc/Kconfig | 6 ++
>>> drivers/rtc/pl031.c | 126 ++++++++++++++++++++++-------------
>>> scripts/config_whitelist.txt | 1 -
>>> 3 files changed, 86 insertions(+), 47 deletions(-)
>>>
>>> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
>>> index a3f8c8aecc..96c4cce410 100644
>>> --- a/drivers/rtc/Kconfig
>>> +++ b/drivers/rtc/Kconfig
>>> @@ -55,6 +55,12 @@ config RTC_MV
>>> Enable Marvell RTC driver. This driver supports the rtc that is present
>>> on some Marvell SoCs.
>>>
>>> +config RTC_PL031
>>> + bool "Enable ARM PL031 driver"
>>> + depends on DM_RTC
>>> + help
>>> + Enable ARM PL031 driver.
>>> +
>>
>> Tom merged
>> http://git.denx.de/?p=u-boot.git;a=commit;h=b19886b9469174213877ef37670ce35c55acb456
>> https://patchwork.ozlabs.org/patch/936533/
>> ARM: qemu-arm: enable RTC
>> which is superseeded by your patch series.
>>
>> We should avoid duplicate entries CONFIG_RTC_PL031.
>>
>> Symbol CONFIG_SYS_RTC_PL031_BASE can be removed in
>> include/configs/qemu-arm.h with this patch.
>>
>> Could you, please, respin your patch series.
>
> I think that your patch be reverted first and my patch be
> merged (in this merge window or next -rc1) as u-boot master
> is still open.
>
> -Takahiro AKASHI
>
>
Hello Takahiro,
I think the changes you planned make perfectly sense.
Will you rework this patch series, so that it will be included into
v2018.11?
Best regards
Heinrich
>> Best regards
>>
>> Heinrich
>>
>>> config RTC_S35392A
>>> bool "Enable S35392A driver"
>>> select BITREVERSE
>>> diff --git a/drivers/rtc/pl031.c b/drivers/rtc/pl031.c
>>> index 8955805e3b..b8fd944e44 100644
>>> --- a/drivers/rtc/pl031.c
>>> +++ b/drivers/rtc/pl031.c
>>> @@ -8,13 +8,11 @@
>>>
>>> #include <common.h>
>>> #include <command.h>
>>> +#include <dm.h>
>>> +#include <errno.h>
>>> #include <rtc.h>
>>> -
>>> -#if defined(CONFIG_CMD_DATE)
>>> -
>>> -#ifndef CONFIG_SYS_RTC_PL031_BASE
>>> -#error CONFIG_SYS_RTC_PL031_BASE is not defined!
>>> -#endif
>>> +#include <asm/io.h>
>>> +#include <asm/types.h>
>>>
>>> /*
>>> * Register definitions
>>> @@ -30,78 +28,114 @@
>>>
>>> #define RTC_CR_START (1 << 0)
>>>
>>> -#define RTC_WRITE_REG(addr, val) \
>>> - (*(volatile unsigned int *)(CONFIG_SYS_RTC_PL031_BASE + (addr)) = (val))
>>> -#define RTC_READ_REG(addr) \
>>> - (*(volatile unsigned int *)(CONFIG_SYS_RTC_PL031_BASE + (addr)))
>>> +struct pl031_platdata {
>>> + phys_addr_t base;
>>> +};
>>>
>>> -static int pl031_initted = 0;
>>> +static inline u32 pl031_read_reg(struct udevice *dev, int reg)
>>> +{
>>> + struct pl031_platdata *pdata = dev_get_platdata(dev);
>>>
>>> -/* Enable RTC Start in Control register*/
>>> -void rtc_init(void)
>>> + return readl(pdata->base + reg);
>>> +}
>>> +
>>> +static inline u32 pl031_write_reg(struct udevice *dev, int reg, u32 value)
>>> {
>>> - RTC_WRITE_REG(RTC_CR, RTC_CR_START);
>>> + struct pl031_platdata *pdata = dev_get_platdata(dev);
>>>
>>> - pl031_initted = 1;
>>> + return writel(value, pdata->base + reg);
>>> }
>>>
>>> /*
>>> - * Reset the RTC. We set the date back to 1970-01-01.
>>> + * Probe RTC device
>>> + */
>>> +static int pl031_probe(struct udevice *dev)
>>> +{
>>> + /* Enable RTC Start in Control register*/
>>> + pl031_write_reg(dev, RTC_CR, RTC_CR_START);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +/*
>>> + * Get the current time from the RTC
>>> */
>>> -void rtc_reset(void)
>>> +static int pl031_get(struct udevice *dev, struct rtc_time *tm)
>>> {
>>> - RTC_WRITE_REG(RTC_LR, 0x00);
>>> - if(!pl031_initted)
>>> - rtc_init();
>>> + unsigned long tim;
>>> +
>>> + if (!tm)
>>> + return -EINVAL;
>>> +
>>> + tim = pl031_read_reg(dev, RTC_DR);
>>> +
>>> + rtc_to_tm(tim, tm);
>>> +
>>> + debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
>>> + tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
>>> + tm->tm_hour, tm->tm_min, tm->tm_sec);
>>> +
>>> + return 0;
>>> }
>>>
>>> /*
>>> * Set the RTC
>>> -*/
>>> -int rtc_set(struct rtc_time *tmp)
>>> + */
>>> +static int pl031_set(struct udevice *dev, const struct rtc_time *tm)
>>> {
>>> unsigned long tim;
>>>
>>> - if(!pl031_initted)
>>> - rtc_init();
>>> + if (!tm)
>>> + return -EINVAL;
>>>
>>> - if (tmp == NULL) {
>>> - puts("Error setting the date/time\n");
>>> - return -1;
>>> - }
>>> + debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
>>> + tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
>>> + tm->tm_hour, tm->tm_min, tm->tm_sec);
>>>
>>> /* Calculate number of seconds this incoming time represents */
>>> - tim = rtc_mktime(tmp);
>>> + tim = rtc_mktime(tm);
>>>
>>> - RTC_WRITE_REG(RTC_LR, tim);
>>> + pl031_write_reg(dev, RTC_LR, tim);
>>>
>>> - return -1;
>>> + return 0;
>>> }
>>>
>>> /*
>>> - * Get the current time from the RTC
>>> + * Reset the RTC. We set the date back to 1970-01-01.
>>> */
>>> -int rtc_get(struct rtc_time *tmp)
>>> +static int pl031_reset(struct udevice *dev)
>>> {
>>> - ulong tim;
>>> + pl031_write_reg(dev, RTC_LR, 0);
>>>
>>> - if(!pl031_initted)
>>> - rtc_init();
>>> + return 0;
>>> +}
>>>
>>> - if (tmp == NULL) {
>>> - puts("Error getting the date/time\n");
>>> - return -1;
>>> - }
>>> +static const struct rtc_ops pl031_ops = {
>>> + .get = pl031_get,
>>> + .set = pl031_set,
>>> + .reset = pl031_reset,
>>> +};
>>>
>>> - tim = RTC_READ_REG(RTC_DR);
>>> +static const struct udevice_id pl031_ids[] = {
>>> + { .compatible = "arm,pl031" },
>>> + { }
>>> +};
>>>
>>> - rtc_to_tm(tim, tmp);
>>> +static int pl031_ofdata_to_platdata(struct udevice *dev)
>>> +{
>>> + struct pl031_platdata *pdata = dev_get_platdata(dev);
>>>
>>> - debug ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
>>> - tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
>>> - tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
>>> + pdata->base = dev_read_addr(dev);
>>>
>>> return 0;
>>> }
>>>
>>> -#endif
>>> +U_BOOT_DRIVER(rtc_pl031) = {
>>> + .name = "rtc-pl031",
>>> + .id = UCLASS_RTC,
>>> + .of_match = pl031_ids,
>>> + .probe = pl031_probe,
>>> + .ofdata_to_platdata = pl031_ofdata_to_platdata,
>>> + .platdata_auto_alloc_size = sizeof(struct pl031_platdata),
>>> + .ops = &pl031_ops,
>>> +};
>>> diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
>>> index 1219dcc3be..17bd2d681c 100644
>>> --- a/scripts/config_whitelist.txt
>>> +++ b/scripts/config_whitelist.txt
>>> @@ -4115,7 +4115,6 @@ CONFIG_SYS_RSTC_RMR_VAL
>>> CONFIG_SYS_RTC_BUS_NUM
>>> CONFIG_SYS_RTC_CNT
>>> CONFIG_SYS_RTC_OSCILLATOR
>>> -CONFIG_SYS_RTC_PL031_BASE
>>> CONFIG_SYS_RTC_REG_BASE_ADDR
>>> CONFIG_SYS_RTC_SETUP
>>> CONFIG_SYS_RV3029_TCR
>>>
>>
>
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