From: Tali Perry <tali.perry1@gmail.com>
To: avifishman70@gmail.com, tmaimon77@gmail.com, venture@google.com,
yuenn@google.com, brendanhiggins@google.com,
mturquette@baylibre.com, sboyd@kernel.org
Cc: openbmc@lists.ozlabs.org, linux-clk@vger.kernel.org,
linux-kernel@vger.kernel.org, Tali Perry <tali.perry1@gmail.com>
Subject: [PATCH v1 1/1] clk: npcm: get fixed input clks from DT
Date: Wed, 5 Dec 2018 21:47:02 +0200 [thread overview]
Message-ID: <20181205194702.257430-3-tali.perry1@gmail.com> (raw)
In-Reply-To: <20181205194702.257430-1-tali.perry1@gmail.com>
---
drivers/clk/clk-npcm7xx.c | 64 +++++++++++++++++++++++++++++++++++++++--------
1 file changed, 53 insertions(+), 11 deletions(-)
diff --git a/drivers/clk/clk-npcm7xx.c b/drivers/clk/clk-npcm7xx.c
index 27a86b7a34db..25f8ccaa3d2f 100644
--- a/drivers/clk/clk-npcm7xx.c
+++ b/drivers/clk/clk-npcm7xx.c
@@ -8,17 +8,23 @@
*/
#include <linux/module.h>
+#include <linux/clk.h>
#include <linux/clk-provider.h>
+#include <linux/device.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
#include <linux/of_address.h>
+#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/err.h>
+#include <linux/rational.h>
#include <linux/bitfield.h>
-
#include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>
+
struct npcm7xx_clk_pll {
struct clk_hw hw;
void __iomem *pllcon;
@@ -44,7 +50,8 @@ static unsigned long npcm7xx_clk_pll_recalc_rate(struct clk_hw *hw,
u64 ret;
if (parent_rate == 0) {
- pr_err("%s: parent rate is zero", __func__);
+ pr_err("%s: parent rate is zero. reg=%s\n", __func__,
+ hw->init->name);
return 0;
}
@@ -65,9 +72,10 @@ static const struct clk_ops npcm7xx_clk_pll_ops = {
.recalc_rate = npcm7xx_clk_pll_recalc_rate,
};
-static struct clk_hw *
-npcm7xx_clk_register_pll(void __iomem *pllcon, const char *name,
- const char *parent_name, unsigned long flags)
+static struct clk_hw *npcm7xx_clk_register_pll(void __iomem *pllcon,
+ const char *name,
+ const char *parent_name,
+ unsigned long flags)
{
struct npcm7xx_clk_pll *pll;
struct clk_init_data init;
@@ -544,12 +552,14 @@ static void __init npcm7xx_clk_init(struct device_node *clk_np)
void __iomem *clk_base;
struct resource res;
struct clk_hw *hw;
+ struct clk *clk;
int ret;
int i;
+ clk_base = NULL;
ret = of_address_to_resource(clk_np, 0, &res);
if (ret) {
- pr_err("%pOFn: failed to get resource, ret %d\n", clk_np,
+ pr_err("%s: failed to get resource, ret %d\n", clk_np->name,
ret);
return;
}
@@ -558,9 +568,10 @@ static void __init npcm7xx_clk_init(struct device_node *clk_np)
if (!clk_base)
goto npcm7xx_init_error;
- npcm7xx_clk_data = kzalloc(struct_size(npcm7xx_clk_data, hws,
- NPCM7XX_NUM_CLOCKS), GFP_KERNEL);
- if (!npcm7xx_clk_data)
+ npcm7xx_clk_data = kzalloc(sizeof(*npcm7xx_clk_data->hws) *
+ NPCM7XX_NUM_CLOCKS + sizeof(npcm7xx_clk_data), GFP_KERNEL);
+
+ if (!npcm7xx_clk_data->hws)
goto npcm7xx_init_np_err;
npcm7xx_clk_data->num = NPCM7XX_NUM_CLOCKS;
@@ -568,6 +579,31 @@ static void __init npcm7xx_clk_init(struct device_node *clk_np)
for (i = 0; i < NPCM7XX_NUM_CLOCKS; i++)
npcm7xx_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER);
+ /* Read fixed clocks. These 3 clocks must be defined in DT */
+ clk = of_clk_get_by_name(clk_np, NPCM7XX_CLK_S_REFCLK);
+ if (IS_ERR(clk)) {
+ pr_err("failed to find external REFCLK on device tree, err=%ld\n",
+ PTR_ERR(clk));
+ clk_put(clk);
+ goto npcm7xx_init_fail_no_clk_on_dt;
+ }
+
+ clk = of_clk_get_by_name(clk_np, NPCM7XX_CLK_S_SYSBYPCK);
+ if (IS_ERR(clk)) {
+ pr_err("failed to find external SYSBYPCK on device tree, err=%ld\n",
+ PTR_ERR(clk));
+ clk_put(clk);
+ goto npcm7xx_init_fail_no_clk_on_dt;
+ }
+
+ clk = of_clk_get_by_name(clk_np, NPCM7XX_CLK_S_MCBYPCK);
+ if (IS_ERR(clk)) {
+ pr_err("failed to find external MCBYPCK on device tree, err=%ld\n",
+ PTR_ERR(clk));
+ clk_put(clk);
+ goto npcm7xx_init_fail_no_clk_on_dt;
+ }
+
/* Register plls */
for (i = 0; i < ARRAY_SIZE(npcm7xx_plls); i++) {
const struct npcm7xx_clk_pll_data *pll_data = &npcm7xx_plls[i];
@@ -646,11 +682,17 @@ static void __init npcm7xx_clk_init(struct device_node *clk_np)
return;
+npcm7xx_init_fail_no_clk_on_dt:
+ pr_err("see Documentation/devicetree/bindings/clock/");
+ pr_err("nuvoton,npcm750-clk.txt for details\n");
npcm7xx_init_fail:
- kfree(npcm7xx_clk_data->hws);
+ if (npcm7xx_clk_data->num)
+ kfree(npcm7xx_clk_data->hws);
npcm7xx_init_np_err:
- iounmap(clk_base);
+ if (clk_base != NULL)
+ iounmap(clk_base);
npcm7xx_init_error:
of_node_put(clk_np);
+ pr_err("clk setup fail\n");
}
CLK_OF_DECLARE(npcm7xx_clk_init, "nuvoton,npcm750-clk", npcm7xx_clk_init);
--
2.14.1
next prev parent reply other threads:[~2018-12-05 19:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-05 19:47 clk: npcm7xx: get fixed input clks from DT Tali Perry
2018-12-05 19:47 ` [PATCH v1 0/1] clk: npcm7xx: get fixed clocks " Tali Perry
2018-12-05 19:47 ` Tali Perry [this message]
2018-12-05 20:42 ` [PATCH v1 1/1] clk: npcm: get fixed input clks " Stephen Boyd
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