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Message-id: <544A402F.1010207@samsung.com>
Date: Fri, 24 Oct 2014 14:03:59 +0200
From: Sylwester Nawrocki <s.nawrocki@...sung.com>
To: Chanwoo Choi <cw00.choi@...sung.com>
Cc: tomasz.figa@...il.com, kgene.kim@...sung.com,
sw0312.kim@...sung.com, kyungmin.park@...sung.com,
inki.dae@...sung.com, geunsik.lim@...sung.com,
linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2 1/2] clk: samsung: exynos4415: Add clocks using common
clock framework
On 24/10/14 13:07, Chanwoo Choi wrote:
> This patch adds the new clock driver of Exynos4415 SoC based on Cortex-A9
> using common clock framework. The CMU (Clock Management Unit) of Exynos4415
> controls PLLs(Phase Locked Loops) and generates system clocks for CPU, buses
> and function clocks for individual IPs.
>
> Cc: Sylwester Nawrocki <s.nawrocki@...sung.com>
> Cc: Tomasz Figa <tomasz.figa@...il.com>
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> Signed-off-by: Tomasz Figa <tomasz.figa@...il.com>
> Signed-off-by: Seung-Woo Kim <sw0312.kim@...sung.com>
> Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
Thanks for the update, there are still couple issues pointed out
by checkpatch.pl unfortunately, please see below.
Please fix the errors, I added also some more comments inline below.
In future please put DT binding documentation patch first in the
series, before the actual driver patch.
WARNING: kfree(NULL) is safe this check is probably not required
#252: FILE: drivers/clk/samsung/clk-exynos4415.c:252:
+ if (clk_regs)
+ kfree(clk_regs);
ERROR: space required after that ',' (ctx:VxV)
#423: FILE: drivers/clk/samsung/clk-exynos4415.c:423:
+ 0,4),
^
WARNING: line over 80 characters
#726: FILE: drivers/clk/samsung/clk-exynos4415.c:726:
+ "div_pxlasync_csis0_fimc", GATE_SCLK_CAM, 10, CLK_SET_RATE_PARENT, 0),
WARNING: line over 80 characters
#817: FILE: drivers/clk/samsung/clk-exynos4415.c:817:
+ GATE(CLK_SMMUFIMC_LITE2, "smmufimc_lite2", "div_aclk_160", GATE_IP_CAM, 22,
WARNING: line over 80 characters
#875: FILE: drivers/clk/samsung/clk-exynos4415.c:875:
+ GATE(CLK_USBDEVICE, "usbdevice", "div_aclk_200", GATE_IP_FSYS, 13, 0, 0),
ERROR: space prohibited after that open parenthesis '('
#920: FILE: drivers/clk/samsung/clk-exynos4415.c:920:
+ PLL_35XX_RATE( 960000000, 320, 4, 1),
ERROR: space prohibited after that open parenthesis '('
#921: FILE: drivers/clk/samsung/clk-exynos4415.c:921:
+ PLL_35XX_RATE( 900000000, 300, 4, 1),
ERROR: space prohibited after that open parenthesis '('
#922: FILE: drivers/clk/samsung/clk-exynos4415.c:922:
+ PLL_35XX_RATE( 850000000, 425, 6, 1),
ERROR: space prohibited after that open parenthesis '('
#923: FILE: drivers/clk/samsung/clk-exynos4415.c:923:
+ PLL_35XX_RATE( 800000000, 200, 3, 1),
ERROR: space prohibited after that open parenthesis '('
#924: FILE: drivers/clk/samsung/clk-exynos4415.c:924:
+ PLL_35XX_RATE( 700000000, 175, 3, 1),
ERROR: space prohibited after that open parenthesis '('
#925: FILE: drivers/clk/samsung/clk-exynos4415.c:925:
+ PLL_35XX_RATE( 667000000, 667, 12, 1),
ERROR: space prohibited after that open parenthesis '('
#926: FILE: drivers/clk/samsung/clk-exynos4415.c:926:
+ PLL_35XX_RATE( 600000000, 400, 4, 2),
ERROR: space prohibited after that open parenthesis '('
#927: FILE: drivers/clk/samsung/clk-exynos4415.c:927:
+ PLL_35XX_RATE( 550000000, 275, 3, 2),
ERROR: space prohibited after that open parenthesis '('
#928: FILE: drivers/clk/samsung/clk-exynos4415.c:928:
+ PLL_35XX_RATE( 533000000, 533, 6, 2),
ERROR: space prohibited after that open parenthesis '('
#929: FILE: drivers/clk/samsung/clk-exynos4415.c:929:
+ PLL_35XX_RATE( 520000000, 260, 3, 2),
ERROR: space prohibited after that open parenthesis '('
#930: FILE: drivers/clk/samsung/clk-exynos4415.c:930:
+ PLL_35XX_RATE( 500000000, 250, 3, 2),
ERROR: space prohibited after that open parenthesis '('
#931: FILE: drivers/clk/samsung/clk-exynos4415.c:931:
+ PLL_35XX_RATE( 440000000, 220, 3, 2),
ERROR: space prohibited after that open parenthesis '('
#932: FILE: drivers/clk/samsung/clk-exynos4415.c:932:
+ PLL_35XX_RATE( 400000000, 200, 3, 2),
ERROR: space prohibited after that open parenthesis '('
#933: FILE: drivers/clk/samsung/clk-exynos4415.c:933:
+ PLL_35XX_RATE( 350000000, 175, 3, 2),
ERROR: space prohibited after that open parenthesis '('
#934: FILE: drivers/clk/samsung/clk-exynos4415.c:934:
+ PLL_35XX_RATE( 300000000, 300, 3, 3),
#935: FILE: drivers/clk/samsung/clk-exynos4415.c:935:
+ PLL_35XX_RATE( 266000000, 266, 3, 3),
ERROR: space prohibited after that open parenthesis '('
#936: FILE: drivers/clk/samsung/clk-exynos4415.c:936:
+ PLL_35XX_RATE( 200000000, 200, 3, 3),
ERROR: space prohibited after that open parenthesis '('
#937: FILE: drivers/clk/samsung/clk-exynos4415.c:937:
+ PLL_35XX_RATE( 160000000, 160, 3, 3),
ERROR: space prohibited after that open parenthesis '('
#938: FILE: drivers/clk/samsung/clk-exynos4415.c:938:
+ PLL_35XX_RATE( 100000000, 200, 3, 4),
ERROR: space prohibited after that open parenthesis '('
#948: FILE: drivers/clk/samsung/clk-exynos4415.c:948:
+ PLL_36XX_RATE( 96000000, 128, 2, 4, 0),
ERROR: space prohibited after that open parenthesis '('
#949: FILE: drivers/clk/samsung/clk-exynos4415.c:949:
+ PLL_36XX_RATE( 84000000, 112, 2, 4, 0),
ERROR: space prohibited after that open parenthesis '('
#950: FILE: drivers/clk/samsung/clk-exynos4415.c:950:
+ PLL_36XX_RATE( 80750011, 107, 2, 4, 43691),
ERROR: space prohibited after that open parenthesis '('
#951: FILE: drivers/clk/samsung/clk-exynos4415.c:951:
+ PLL_36XX_RATE( 73728004, 98, 2, 4, 19923),
ERROR: space prohibited after that open parenthesis '('
#952: FILE: drivers/clk/samsung/clk-exynos4415.c:952:
+ PLL_36XX_RATE( 67987602, 271, 3, 5, 62285),
ERROR: space prohibited after that open parenthesis '('
#953: FILE: drivers/clk/samsung/clk-exynos4415.c:953:
+ PLL_36XX_RATE( 65911004, 175, 2, 5, 49982),
ERROR: space prohibited after that open parenthesis '('
#954: FILE: drivers/clk/samsung/clk-exynos4415.c:954:
+ PLL_36XX_RATE( 50000000, 200, 3, 5, 0),
ERROR: space prohibited after that open parenthesis '('
#955: FILE: drivers/clk/samsung/clk-exynos4415.c:955:
+ PLL_36XX_RATE( 49152003, 131, 2, 5, 4719),
ERROR: space prohibited after that open parenthesis '('
#956: FILE: drivers/clk/samsung/clk-exynos4415.c:956:
+ PLL_36XX_RATE( 48000000, 128, 2, 5, 0),
ERROR: space prohibited after that open parenthesis '('
#957: FILE: drivers/clk/samsung/clk-exynos4415.c:957:
+ PLL_36XX_RATE( 45250000, 181, 3, 5, 0),
total: 30 errors, 4 warnings, 1133 lines checked
drivers/clk/samsung/clk-exynos4415.c has style problems, please review.
> ---
> drivers/clk/samsung/Makefile | 1 +
> drivers/clk/samsung/clk-exynos4415.c | 1133 ++++++++++++++++++++++++++++++++
> include/dt-bindings/clock/exynos4415.h | 360 ++++++++++
> 3 files changed, 1494 insertions(+)
> create mode 100644 drivers/clk/samsung/clk-exynos4415.c
> create mode 100644 include/dt-bindings/clock/exynos4415.h
> diff --git a/drivers/clk/samsung/clk-exynos4415.c b/drivers/clk/samsung/clk-exynos4415.c
> new file mode 100644
> index 0000000..a4b6211
> --- /dev/null
> +++ b/drivers/clk/samsung/clk-exynos4415.c
> @@ -0,0 +1,1133 @@
> +static struct samsung_clk_reg_dump *clk_regs;
> +static struct samsung_clk_provider *ctx;
> +
> +static unsigned long cmu_clk_regs[] __initdata = {
> +};
> +
> +static int exynos_clk_suspend(void)
Please prefix such function (and above variable) names with exynos4415,
as is done for other SoC drivers.
> +{
> + samsung_clk_save(ctx->reg_base, clk_regs, ARRAY_SIZE(cmu_clk_regs));
> +
> + return 0;
> +}
> +
> +static void exynos_clk_resume(void)
exynos4415_clk_resume ?
> +{
> + samsung_clk_restore(ctx->reg_base, clk_regs, ARRAY_SIZE(cmu_clk_regs));
> +}
> +
> +static struct syscore_ops exynos_clk_syscore_ops = {
exynos4415_clk_syscore_ops ?
> + .suspend = exynos_clk_suspend,
> + .resume = exynos_clk_resume,
> +};
> +
> +static void exynos_clk_sleep_init(void)
exynos4415_clk_sleep_init ?
> +{
> + clk_regs = samsung_clk_alloc_reg_dump(cmu_clk_regs,
> + ARRAY_SIZE(cmu_clk_regs));
> + if (!clk_regs) {
> + pr_warn("%s: Failed to allocate sleep save data\n", __func__);
> + goto err;
You could just return here.
> + }
> +
> + register_syscore_ops(&exynos_clk_syscore_ops);
> +
> + return;
> +err:
> + if (clk_regs)
> + kfree(clk_regs);
kfree() can be removed (and the condition could never be true anyway).
> +}
> +#else
> +static inline void exynos_clk_sleep_init(void) { }
exynos4415_clk_sleep_init ?
> +#endif
How about prefixing the table names below with "exynos4415", rather than
"samsung" ?
> +static struct samsung_fixed_factor_clock fixed_factor_clks[] __initdata = {
> +};
> +
> +static struct samsung_fixed_rate_clock fixed_rate_clks[] __initdata = {
> + FRATE(CLK_SCLK_HDMIPHY, "sclk_hdmiphy", NULL, CLK_IS_ROOT, 27000000),
> +};
> +
> +static struct samsung_mux_clock mux_clks[] __initdata = {
> +};
> +
> +static struct samsung_div_clock div_clks[] __initdata = {
> +};
> +
> +static struct samsung_gate_clock gate_clks[] __initdata = {
> +};
> +
> +/*
> + * APLL & MPLL & BPLL & ISP_PLL & DISP_PLL & G3D_PLL
> + */
> +static struct samsung_pll_rate_table exynos4415_pll_rates[] = {
> + PLL_35XX_RATE(1600000000, 400, 3, 1),
> + PLL_35XX_RATE(1500000000, 250, 2, 1),
> + PLL_35XX_RATE(1400000000, 175, 3, 0),
> + PLL_35XX_RATE(1300000000, 325, 3, 1),
> + PLL_35XX_RATE(1200000000, 400, 4, 1),
> + PLL_35XX_RATE(1100000000, 275, 3, 1),
> + PLL_35XX_RATE(1066000000, 533, 6, 1),
> + PLL_35XX_RATE(1000000000, 250, 3, 1),
> + PLL_35XX_RATE( 960000000, 320, 4, 1),
> + PLL_35XX_RATE( 900000000, 300, 4, 1),
> + PLL_35XX_RATE( 850000000, 425, 6, 1),
> + PLL_35XX_RATE( 800000000, 200, 3, 1),
> + PLL_35XX_RATE( 700000000, 175, 3, 1),
> + PLL_35XX_RATE( 667000000, 667, 12, 1),
> + PLL_35XX_RATE( 600000000, 400, 4, 2),
> + PLL_35XX_RATE( 550000000, 275, 3, 2),
> + PLL_35XX_RATE( 533000000, 533, 6, 2),
> + PLL_35XX_RATE( 520000000, 260, 3, 2),
> + PLL_35XX_RATE( 500000000, 250, 3, 2),
> + PLL_35XX_RATE( 440000000, 220, 3, 2),
> + PLL_35XX_RATE( 400000000, 200, 3, 2),
> + PLL_35XX_RATE( 350000000, 175, 3, 2),
> + PLL_35XX_RATE( 300000000, 300, 3, 3),
> + PLL_35XX_RATE( 266000000, 266, 3, 3),
> + PLL_35XX_RATE( 200000000, 200, 3, 3),
> + PLL_35XX_RATE( 160000000, 160, 3, 3),
> + PLL_35XX_RATE( 100000000, 200, 3, 4),
> + { /* sentinel */ }
> +};
> +
> +/* EPLL */
> +static struct samsung_pll_rate_table exynos4415_epll_rates[] = {
> + PLL_36XX_RATE(800000000, 200, 3, 1, 0),
> + PLL_36XX_RATE(288000000, 96, 2, 2, 0),
> + PLL_36XX_RATE(192000000, 128, 2, 3, 0),
> + PLL_36XX_RATE(144000000, 96, 2, 3, 0),
> + PLL_36XX_RATE( 96000000, 128, 2, 4, 0),
> + PLL_36XX_RATE( 84000000, 112, 2, 4, 0),
> + PLL_36XX_RATE( 80750011, 107, 2, 4, 43691),
> + PLL_36XX_RATE( 73728004, 98, 2, 4, 19923),
> + PLL_36XX_RATE( 67987602, 271, 3, 5, 62285),
> + PLL_36XX_RATE( 65911004, 175, 2, 5, 49982),
> + PLL_36XX_RATE( 50000000, 200, 3, 5, 0),
> + PLL_36XX_RATE( 49152003, 131, 2, 5, 4719),
> + PLL_36XX_RATE( 48000000, 128, 2, 5, 0),
> + PLL_36XX_RATE( 45250000, 181, 3, 5, 0),
> + { /* sentinel */ }
> +};
> +
> +static struct samsung_pll_clock plls[nr_plls] __initdata = {
> +};
> +
> +static void __init exynos4415_cmu_init(struct device_node *np)
> +{
> +}
> +CLK_OF_DECLARE(exynos4415_cmu, "samsung,exynos4415-cmu", exynos4415_cmu_init);
> +
> +/*
> + * CMU DMC
> + */
> +
> +#ifdef CONFIG_PM_SLEEP
Similarly for dmc, can we have function, table and below two static
variable names prefixed with exynos4415, like in exynos3250 driver ?
> +static struct samsung_clk_reg_dump *dmc_clk_regs;
> +static struct samsung_clk_provider *dmc_ctx;
> +
> +static unsigned long dmc_save_list[] __initdata = {
> +};
> +
> +static int dmc_clk_suspend(void)
> +{
> + samsung_clk_save(dmc_ctx->reg_base,
> + dmc_clk_regs, ARRAY_SIZE(dmc_save_list));
> + return 0;
> +}
> +
> +static void dmc_clk_resume(void)
> +{
> + samsung_clk_restore(dmc_ctx->reg_base,
> + dmc_clk_regs, ARRAY_SIZE(dmc_save_list));
> +}
> +
> +static struct syscore_ops dmc_clk_syscore_ops = {
> + .suspend = dmc_clk_suspend,
> + .resume = dmc_clk_resume,
> +};
> +
> +static void dmc_clk_sleep_init(void)
> +{
> +}
> +#else
> +static inline void dmc_clk_sleep_init(void) { }
> +#endif /* CONFIG_PM_SLEEP */
> +
> +static struct samsung_mux_clock dmc_mux_clks[] __initdata = {
> +};
> +
> +static struct samsung_div_clock dmc_div_clks[] __initdata = {
> +};
> +
> +static struct samsung_pll_clock dmc_plls[nr_dmc_plls] __initdata = {
> +};
--
Thanks,
Sylwester
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