From: nm@ti•com (Nishanth Menon)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCHv9 06/43] CLK: ti: add init support for clock IP blocks
Date: Thu, 31 Oct 2013 10:42:16 -0500 [thread overview]
Message-ID: <52727A58.9010903@ti.com> (raw)
In-Reply-To: <1382716658-6964-7-git-send-email-t-kristo@ti.com>
On 10/25/2013 10:57 AM, Tero Kristo wrote:
> ti_dt_clk_init_provider() can now be used to initialize the contents of
> a single clock IP block. This parses all the clocks under the IP block
> and calls the corresponding init function for them.
>
> Signed-off-by: Tero Kristo <t-kristo@ti•com>
> ---
> drivers/clk/ti/clk.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/clk/ti.h | 1 +
> 2 files changed, 60 insertions(+)
>
> diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c
> index ad58b01..7f030d7 100644
> --- a/drivers/clk/ti/clk.c
> +++ b/drivers/clk/ti/clk.c
> @@ -19,6 +19,9 @@
> #include <linux/clkdev.h>
> #include <linux/clk/ti.h>
> #include <linux/of.h>
> +#include <linux/list.h>
> +
> +extern struct of_device_id __clk_of_table[];
>
> /**
> * ti_dt_clocks_register - register DT duplicate clocks during boot
> @@ -50,3 +53,59 @@ void __init ti_dt_clocks_register(struct ti_dt_clk oclks[])
> }
> }
> }
> +
> +typedef int (*ti_of_clk_init_cb_t)(struct device_node *, struct regmap *);
> +
> +struct clk_init_item {
> + struct regmap *regmap;
> + struct device_node *np;
> + ti_of_clk_init_cb_t init_cb;
> + struct list_head node;
> +};
> +
> +static LIST_HEAD(retry_list);
> +
> +void __init ti_dt_clk_init_provider(struct device_node *parent,
> + struct regmap *regmap)
> +{
> + const struct of_device_id *match;
> + struct device_node *np;
> + ti_of_clk_init_cb_t clk_init_cb;
> + struct clk_init_item *retry;
> + struct clk_init_item *tmp;
> + int ret;
> +
> + for_each_child_of_node(parent, np) {
> + match = of_match_node(__clk_of_table, np);
> + if (!match)
> + continue;
> + clk_init_cb = match->data;
I must admit I am confused here.
a) of_clk_init (in the generic clk.c) uses of_clk_init_cb_t as match
data. The prototype of the generic of_clk_init_cb_t is typedef void
(*of_clk_init_cb_t)(struct device_node *);
b) both of_clk_init and ti_dt_clk_init_provider looks up clock nodes
from __clk_of_table
I assume we need ti_dt_clk_init_provider to be always called with
clock list, as a result of_clk_init(NULL); will never be invoked. This
is counter productive as you have have generic non SoC clock providers
as well who would have been invoked with of_clk_init(NULL);
I do strongly encourage using of_clk_init(NULL) and not having to
switch the clk_init call back with SoC specific one as it forces
un-intended dependency.
Further such as SoC specific callback should have been in a header.
> + pr_debug("%s: initializing: %s\n", __func__, np->name);
one further comment - using pr_fmt will save us from using __func__
for every pr_* message :(
> + ret = clk_init_cb(np, regmap);
> + if (ret == -EAGAIN) {
> + pr_debug("%s: adding to again list...\n", np->name);
> + retry = kzalloc(sizeof(*retry), GFP_KERNEL);
> + retry->np = np;
> + retry->regmap = regmap;
> + retry->init_cb = clk_init_cb;
> + list_add(&retry->node, &retry_list);
> + } else if (ret) {
> + pr_err("%s: clock init failed for %s (%d)!\n", __func__,
> + np->name, ret);
> + }
> + }
> +
> + list_for_each_entry_safe(retry, tmp, &retry_list, node) {
> + pr_debug("%s: retry-init: %s\n", __func__, retry->np->name);
> + ret = retry->init_cb(retry->np, retry->regmap);
> + if (ret == -EAGAIN) {
> + pr_debug("%s failed again?\n", retry->np->name);
> + } else {
> + if (ret)
> + pr_err("%s: clock init failed for %s (%d)!\n",
> + __func__, retry->np->name, ret);
> + list_del(&retry->node);
> + kfree(retry);
> + }
> + }
> +}
> diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h
> index 9786752..7ab02fa 100644
> --- a/include/linux/clk/ti.h
> +++ b/include/linux/clk/ti.h
> @@ -177,6 +177,7 @@ int omap3_dpll4_set_rate(struct clk_hw *clk, unsigned long rate,
> unsigned long parent_rate);
>
> void ti_dt_clocks_register(struct ti_dt_clk *oclks);
> +void ti_dt_clk_init_provider(struct device_node *np, struct regmap *regmap);
>
> extern const struct clk_hw_omap_ops clkhwops_omap3_dpll;
> extern const struct clk_hw_omap_ops clkhwops_omap4_dpllmx;
>
--
Regards,
Nishanth Menon
next prev parent reply other threads:[~2013-10-31 15:42 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-25 15:56 [PATCHv9 00/43] ARM: TI SoC clock DT conversion Tero Kristo
2013-10-25 15:56 ` [PATCHv9 01/43] clk: Add support for regmap register read/write Tero Kristo
2013-10-31 14:03 ` Nishanth Menon
2013-10-31 14:40 ` Tero Kristo
2013-10-31 15:46 ` Nishanth Menon
2013-11-01 8:57 ` Tero Kristo
2013-11-05 21:43 ` Gerhard Sittig
2013-11-06 10:54 ` Tero Kristo
2013-11-02 13:26 ` Tomasz Figa
2013-10-25 15:56 ` [PATCHv9 02/43] clk: divider: add init call which supports regmap Tero Kristo
2013-10-25 15:56 ` [PATCHv9 03/43] clk: mux: " Tero Kristo
2013-10-25 15:56 ` [PATCHv9 04/43] CLK: TI: Add DPLL clock support Tero Kristo
2013-10-31 14:19 ` Nishanth Menon
2013-10-31 14:56 ` Tero Kristo
2013-10-31 15:25 ` Nishanth Menon
2013-10-25 15:56 ` [PATCHv9 05/43] CLK: TI: add DT alias clock registration mechanism Tero Kristo
2013-10-29 17:50 ` Matt Sealey
2013-10-30 8:29 ` Tero Kristo
2013-10-30 17:38 ` Matt Sealey
2013-10-31 9:18 ` Tero Kristo
2013-11-02 13:49 ` Tomasz Figa
2013-11-04 22:45 ` Matt Sealey
2013-10-25 15:57 ` [PATCHv9 06/43] CLK: ti: add init support for clock IP blocks Tero Kristo
2013-10-31 15:42 ` Nishanth Menon [this message]
2013-11-01 9:12 ` Tero Kristo
2013-11-01 19:13 ` Nishanth Menon
2013-11-04 7:23 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 07/43] CLK: TI: add autoidle support Tero Kristo
2013-10-31 16:05 ` Nishanth Menon
2013-11-01 9:18 ` Tero Kristo
2013-11-01 19:16 ` Nishanth Menon
2013-11-04 10:00 ` Tero Kristo
2013-11-04 14:59 ` Nishanth Menon
2013-11-05 8:10 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 08/43] clk: ti: add composite clock support Tero Kristo
2013-10-31 16:27 ` Nishanth Menon
2013-10-31 16:32 ` Nishanth Menon
2013-11-01 9:40 ` Tero Kristo
2013-11-01 9:35 ` Tero Kristo
2013-11-01 19:24 ` Nishanth Menon
2013-10-25 15:57 ` [PATCHv9 09/43] CLK: ti: add support for ti divider-clock Tero Kristo
2013-10-31 18:02 ` Nishanth Menon
2013-11-01 9:48 ` Tero Kristo
2013-11-01 9:54 ` Tero Kristo
2013-11-01 19:35 ` Nishanth Menon
2013-11-04 10:54 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 10/43] clk: ti: add support for TI fixed factor clock Tero Kristo
2013-10-31 18:12 ` Nishanth Menon
2013-11-01 9:52 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 11/43] CLK: TI: add support for gate clock Tero Kristo
2013-11-01 20:11 ` Nishanth Menon
2013-11-04 12:23 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 12/43] CLK: TI: add support for clockdomain binding Tero Kristo
2013-11-01 20:22 ` Nishanth Menon
2013-11-04 14:30 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 13/43] clk: ti: add support for basic mux clock Tero Kristo
2013-11-01 21:01 ` Nishanth Menon
2013-11-05 8:09 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 14/43] CLK: TI: add omap4 clock init file Tero Kristo
2013-10-25 15:57 ` [PATCHv9 15/43] CLK: TI: add omap5 " Tero Kristo
2013-10-25 15:57 ` [PATCHv9 16/43] CLK: TI: omap5: Initialize USB_DPLL at boot Tero Kristo
2013-10-25 15:57 ` [PATCHv9 17/43] CLK: TI: DRA7: Add APLL support Tero Kristo
2013-10-25 15:57 ` [PATCHv9 18/43] CLK: TI: add dra7 clock init file Tero Kristo
2013-10-25 15:57 ` [PATCHv9 19/43] CLK: TI: add am33xx " Tero Kristo
2013-10-25 15:57 ` [PATCHv9 20/43] CLK: TI: add interface clock support for OMAP3 Tero Kristo
2013-10-25 15:57 ` [PATCHv9 21/43] CLK: TI: add omap3 clock init file Tero Kristo
2013-10-25 15:57 ` [PATCHv9 22/43] CLK: TI: add am43xx " Tero Kristo
2013-10-25 15:57 ` [PATCHv9 23/43] ARM: dts: omap4 clock data Tero Kristo
2013-10-25 15:57 ` [PATCHv9 24/43] ARM: dts: omap5 " Tero Kristo
2013-10-25 15:57 ` [PATCHv9 25/43] ARM: dts: dra7 " Tero Kristo
2013-10-25 15:57 ` [PATCHv9 26/43] ARM: dts: clk: Add apll related clocks Tero Kristo
2013-10-25 15:57 ` [PATCHv9 27/43] ARM: dts: DRA7: Change apll_pcie_m2_ck to fixed factor clock Tero Kristo
2013-10-25 15:57 ` [PATCHv9 28/43] ARM: dts: DRA7: Add PCIe related clock nodes Tero Kristo
2013-10-25 15:57 ` [PATCHv9 29/43] ARM: dts: DRA7: link in clock DT data Tero Kristo
2013-10-25 15:57 ` [PATCHv9 30/43] ARM: dts: am33xx clock data Tero Kristo
2013-10-26 0:36 ` Jan Lübbe
2013-10-26 12:46 ` Tero Kristo
2013-10-28 9:59 ` Jan Lübbe
2013-10-28 10:12 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 31/43] ARM: dts: omap3 " Tero Kristo
2013-10-25 15:57 ` [PATCHv9 32/43] ARM: dts: AM35xx: use DT " Tero Kristo
2013-11-01 21:18 ` Nishanth Menon
2013-11-05 8:12 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 33/43] ARM: dts: am43xx " Tero Kristo
2013-11-01 21:16 ` Nishanth Menon
2013-11-04 14:15 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 34/43] ARM: OMAP2+: clock: add support for regmap Tero Kristo
2013-10-25 15:57 ` [PATCHv9 35/43] ARM: OMAP2+: clock: use driver API instead of direct memory read/write Tero Kristo
2013-10-25 15:57 ` [PATCHv9 36/43] ARM: OMAP: hwmod: fix an incorrect clk type cast with _get_clkdm Tero Kristo
2013-10-25 15:57 ` [PATCHv9 37/43] ARM: OMAP3: hwmod: initialize clkdm from clkdm_name Tero Kristo
2013-10-25 15:57 ` [PATCHv9 38/43] ARM: OMAP2+: PRM: add support for initializing PRCM clock modules from DT Tero Kristo
2013-11-01 21:07 ` Nishanth Menon
2013-11-05 8:22 ` Tero Kristo
2013-10-25 15:57 ` [PATCHv9 39/43] ARM: OMAP2+: io: use new clock init API Tero Kristo
2013-10-25 15:57 ` [PATCHv9 40/43] ARM: OMAP4: remove old clock data and link in new clock init code Tero Kristo
2013-10-25 15:57 ` [PATCHv9 41/43] ARM: OMAP: DRA7: Enable clock init Tero Kristo
2013-10-25 15:57 ` [PATCHv9 42/43] ARM: AM33xx: remove old clock data and link in new clock init code Tero Kristo
2013-10-25 15:57 ` [PATCHv9 43/43] ARM: OMAP3: use DT clock init if DT data is available Tero Kristo
2013-10-29 16:19 ` [PATCHv9 00/43] ARM: TI SoC clock DT conversion Nishanth Menon
2013-10-30 8:23 ` Tero Kristo
2013-10-30 15:00 ` Nishanth Menon
2013-10-30 20:10 ` Nishanth Menon
2013-10-31 9:10 ` Tero Kristo
2013-10-31 13:55 ` Nishanth Menon
2013-11-01 21:25 ` Nishanth Menon
2013-11-04 7:15 ` Tero Kristo
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