Re: [PATCH v5 5/8] clocksource/drivers/rockchip_timer: split bc_timer into rk_timer and rk_clock_event_device

Daniel Lezcano
2017-01-30T13:13:41Z

On Tue, Jan 24, 2017 at 03:16:40PM +0300, Alexander Kochetkov wrote:
> The patch move ce field out of struct bc_timer into struct
> rk_clock_event_device and rename struct bc_timer to struct rk_timer.
>
> The main idea for the commit is to exctact low level timer
> routines from current implementation so they could be
> reused in the following clocksource implementation commit.
>
> This is refactoring step without functional changes.
>
> Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
> Reviwed-by: Heiko Stübner <heiko@sntech.de>

I don't get the point of these changes. The patch does not explain why they are
needed.

> ---
> drivers/clocksource/rockchip_timer.c | 33 ++++++++++++++++++++++-----------
> 1 file changed, 22 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/clocksource/rockchip_timer.c b/drivers/clocksource/rockchip_timer.c
> index 23e267a..6d68d4c 100644
> --- a/drivers/clocksource/rockchip_timer.c
> +++ b/drivers/clocksource/rockchip_timer.c
> @@ -29,18 +29,28 @@
> #define TIMER_MODE_USER_DEFINED_COUNT (1 << 1)
> #define TIMER_INT_UNMASK (1 << 2)
>
> -struct bc_timer {
> - struct clock_event_device ce;
> +struct rk_timer {
> void __iomem *base;
> void __iomem *ctrl;
> u32 freq;
> };
>
> -static struct bc_timer bc_timer;
> +struct rk_clock_event_device {
> + struct clock_event_device ce;
> + struct rk_timer timer;
> +};
> +
> +static struct rk_clock_event_device bc_timer;
> +
> +static inline struct rk_clock_event_device*
> +rk_clock_event_device(struct clock_event_device *ce)
> +{
> + return container_of(ce, struct rk_clock_event_device, ce);
> +}
>
> -static inline struct bc_timer *rk_timer(struct clock_event_device *ce)
> +static inline struct rk_timer *rk_timer(struct clock_event_device *ce)
> {
> - return container_of(ce, struct bc_timer, ce);
> + return &rk_clock_event_device(ce)->timer;
> }
>
> static inline void __iomem *rk_base(struct clock_event_device *ce)
> @@ -116,16 +126,17 @@ static irqreturn_t rk_timer_interrupt(int irq, void *dev_id)
> static int __init rk_timer_init(struct device_node *np, u32 ctrl_reg)
> {
> struct clock_event_device *ce = &bc_timer.ce;
> + struct rk_timer *timer = &bc_timer.timer;
> struct clk *timer_clk;
> struct clk *pclk;
> int ret = -EINVAL, irq;
>
> - bc_timer.base = of_iomap(np, 0);
> - if (!bc_timer.base) {
> + timer->base = of_iomap(np, 0);
> + if (!timer->base) {
> pr_err("Failed to get base address for '%s'\n", TIMER_NAME);
> return -ENXIO;
> }
> - bc_timer.ctrl = bc_timer.base + ctrl_reg;
> + timer->ctrl = timer->base + ctrl_reg;
>
> pclk = of_clk_get_by_name(np, "pclk");
> if (IS_ERR(pclk)) {
> @@ -153,7 +164,7 @@ static int __init rk_timer_init(struct device_node *np, u32 ctrl_reg)
> goto out_timer_clk;
> }
>
> - bc_timer.freq = clk_get_rate(timer_clk);
> + timer->freq = clk_get_rate(timer_clk);
>
> irq = irq_of_parse_and_map(np, 0);
> if (!irq) {
> @@ -181,7 +192,7 @@ static int __init rk_timer_init(struct device_node *np, u32 ctrl_reg)
> goto out_irq;
> }
>
> - clockevents_config_and_register(ce, bc_timer.freq, 1, UINT_MAX);
> + clockevents_config_and_register(ce, timer->freq, 1, UINT_MAX);
>
> return 0;
>
> @@ -190,7 +201,7 @@ static int __init rk_timer_init(struct device_node *np, u32 ctrl_reg)
> out_timer_clk:
> clk_disable_unprepare(pclk);
> out_unmap:
> - iounmap(bc_timer.base);
> + iounmap(timer->base);
>
> return ret;
> }
> --
> 1.7.9.5
>

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