linux-kernel - Re: [PATCH v13 0/5] Add i.MX8MQ clock driver

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Date:   Wed, 28 Nov 2018 16:41:48 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     "A.s. Dong" <aisheng.dong@....com>, Abel Vesa <abel.vesa@....com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Fabio Estevam <fabio.estevam@....com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Abel Vesa <abelvesa@...ux.com>, Abel Vesa <abel.vesa@....com>
Subject: Re: [PATCH v13 0/5] Add i.MX8MQ clock driver

Quoting Abel Vesa (2018-11-13 08:19:56)
> Here is a link to the 12th version:
> https://lkml.org/lkml/2018/11/7/642
> 
> Changes since v12:
>  * replaced the division in clk_pll_recalc_rate in clk-frac
>    with do_div as suggested by Stephen
> 
> Abel Vesa (2):
>   clk: imx: Add imx composite clock
>   clk: imx: Add clock driver for i.MX8MQ CCM
> 
> Lucas Stach (3):
>   dt-bindings: add binding for i.MX8MQ CCM
>   clk: imx: add fractional PLL output clock
>   clk: imx: Add SCCG PLL type
> 

I had to apply this set of fixes to silence sparse and smatch warnings
about things that are not right. Please take a look over things and see
if it's sane.

diff --git a/drivers/clk/imx/clk-composite-8m.c b/drivers/clk/imx/clk-composite-8m.c
index bcd31d889584..6d9d3714b4df 100644
--- a/drivers/clk/imx/clk-composite-8m.c
+++ b/drivers/clk/imx/clk-composite-8m.c
@@ -127,8 +127,8 @@ struct clk *imx8m_clk_composite_flags(const char *name,
 					int num_parents, void __iomem *reg,
 					unsigned long flags)
 {
-	struct clk_hw *hw = NULL, *mux_hw = NULL;
-	struct clk_hw *div_hw = NULL, *gate_hw = NULL;
+	struct clk_hw *hw = ERR_PTR(-ENOMEM), *mux_hw;
+	struct clk_hw *div_hw, *gate_hw;
 	struct clk_divider *div = NULL;
 	struct clk_gate *gate = NULL;
 	struct clk_mux *mux = NULL;
diff --git a/drivers/clk/imx/clk-frac-pll.c b/drivers/clk/imx/clk-frac-pll.c
index a3732be5ad7f..98726206f3c4 100644
--- a/drivers/clk/imx/clk-frac-pll.c
+++ b/drivers/clk/imx/clk-frac-pll.c
@@ -14,6 +14,8 @@
 #include <linux/slab.h>
 #include <linux/bitfield.h>
 
+#include "clk.h"
+
 #define PLL_CFG0		0x0
 #define PLL_CFG1		0x4
 
@@ -214,7 +216,7 @@ struct clk *imx_clk_frac_pll(const char *name, const char *parent_name,
 	ret = clk_hw_register(NULL, hw);
 	if (ret) {
 		kfree(pll);
-		return ERR_CAST(hw);
+		return ERR_PTR(ret);
 	}
 
 	return hw->clk;
diff --git a/drivers/clk/imx/clk-sccg-pll.c b/drivers/clk/imx/clk-sccg-pll.c
index 4666b96bdb3f..ee7752bace89 100644
--- a/drivers/clk/imx/clk-sccg-pll.c
+++ b/drivers/clk/imx/clk-sccg-pll.c
@@ -249,7 +249,7 @@ struct clk *imx_clk_sccg_pll(const char *name,
 	ret = clk_hw_register(NULL, hw);
 	if (ret) {
 		kfree(pll);
-		return ERR_CAST(hw);
+		return ERR_PTR(ret);
 	}
 
 	return hw->clk;