Please, always include a commit message, even if it is short.
On 05/03/2016 at 23:38:47 +0100, Paul Cercueil wrote :
> Signed-off-by: Paul Cercueil <p...@crapouillou.net>
> ---
> drivers/rtc/Kconfig | 6 +++---
> drivers/rtc/rtc-jz4740.c | 50
> ++++++++++++++++++++++++++++++++++++++++++++++--
> 2 files changed, 51 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> index e593c55..b322f08 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -1494,10 +1494,10 @@ config RTC_DRV_MPC5121
>
> config RTC_DRV_JZ4740
> tristate "Ingenic JZ4740 SoC"
> - depends on MACH_JZ4740 || COMPILE_TEST
> + depends on MACH_INGENIC || COMPILE_TEST
> help
> - If you say yes here you get support for the Ingenic JZ4740 SoC RTC
> - controller.
> + If you say yes here you get support for the Ingenic JZ47xx SoCs RTC
> + controllers.
>
> This driver can also be buillt as a module. If so, the module
> will be called rtc-jz4740.
> diff --git a/drivers/rtc/rtc-jz4740.c b/drivers/rtc/rtc-jz4740.c
> index b2bcfc0..47617bd 100644
> --- a/drivers/rtc/rtc-jz4740.c
> +++ b/drivers/rtc/rtc-jz4740.c
> @@ -29,6 +29,10 @@
> #define JZ_REG_RTC_HIBERNATE 0x20
> #define JZ_REG_RTC_SCRATCHPAD 0x34
>
> +/* The following are present on the jz4780 */
> +#define JZ_REG_RTC_WENR 0x3C
> +#define JZ_RTC_WENR_WEN BIT(31)
> +
> #define JZ_RTC_CTRL_WRDY BIT(7)
> #define JZ_RTC_CTRL_1HZ BIT(6)
> #define JZ_RTC_CTRL_1HZ_IRQ BIT(5)
> @@ -37,8 +41,17 @@
> #define JZ_RTC_CTRL_AE BIT(2)
> #define JZ_RTC_CTRL_ENABLE BIT(0)
>
> +/* Magic value to enable writes on jz4780 */
> +#define JZ_RTC_WENR_MAGIC 0xA55A
> +
> +enum jz4740_rtc_type {
> + ID_JZ4740,
> + ID_JZ4780,
> +};
> +
> struct jz4740_rtc {
> void __iomem *base;
> + enum jz4740_rtc_type type;
>
> struct rtc_device *rtc;
>
> @@ -64,11 +77,33 @@ static int jz4740_rtc_wait_write_ready(struct jz4740_rtc
> *rtc)
> return timeout ? 0 : -EIO;
> }
>
> +static inline int jz4780_rtc_enable_write(struct jz4740_rtc *rtc)
> +{
> + uint32_t ctrl;
> + int ret, timeout = 1000;
> +
> + ret = jz4740_rtc_wait_write_ready(rtc);
> + if (ret != 0)
> + return ret;
> +
> + writel(JZ_RTC_WENR_MAGIC, rtc->base + JZ_REG_RTC_WENR);
> +
> + do {
> + ctrl = readl(rtc->base + JZ_REG_RTC_WENR);
> + } while (!(ctrl & JZ_RTC_WENR_WEN) && --timeout);
> +
> + return timeout ? 0 : -EIO;
> +}
> +
> static inline int jz4740_rtc_reg_write(struct jz4740_rtc *rtc, size_t reg,
> uint32_t val)
> {
> - int ret;
> - ret = jz4740_rtc_wait_write_ready(rtc);
> + int ret = 0;
> +
> + if (rtc->type >= ID_JZ4780)
> + ret = jz4780_rtc_enable_write(rtc);
> + if (ret == 0)
> + ret = jz4740_rtc_wait_write_ready(rtc);
> if (ret == 0)
> writel(val, rtc->base + reg);
>
> @@ -216,11 +251,14 @@ static int jz4740_rtc_probe(struct platform_device
> *pdev)
> struct jz4740_rtc *rtc;
> uint32_t scratchpad;
> struct resource *mem;
> + const struct platform_device_id *id = platform_get_device_id(pdev);
>
> rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
> if (!rtc)
> return -ENOMEM;
>
> + rtc->type = id->driver_data;
> +
> rtc->irq = platform_get_irq(pdev, 0);
> if (rtc->irq < 0) {
> dev_err(&pdev->dev, "Failed to get platform irq\n");
> @@ -295,12 +333,20 @@ static const struct dev_pm_ops jz4740_pm_ops = {
> #define JZ4740_RTC_PM_OPS NULL
> #endif /* CONFIG_PM */
>
> +static const struct platform_device_id jz4740_rtc_ids[] = {
> + {"jz4740-rtc", ID_JZ4740},
> + {"jz4780-rtc", ID_JZ4780},
> + {}
> +};
> +MODULE_DEVICE_TABLE(platform, jz4740_rtc_ids);
> +
> static struct platform_driver jz4740_rtc_driver = {
> .probe = jz4740_rtc_probe,
> .driver = {
> .name = "jz4740-rtc",
> .pm = JZ4740_RTC_PM_OPS,
> },
> + .id_table = jz4740_rtc_ids,
> };
>
> module_platform_driver(jz4740_rtc_driver);
> --
> 2.7.0
>
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
