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Message-ID: <7dff6595-f3e1-5a2e-0a81-2f3bf1903f12@collabora.com>
Date: Thu, 29 Sep 2022 15:07:53 +0200
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: Johnson Wang <johnson.wang@...iatek.com>, robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org, sboyd@...nel.org
Cc: linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org,
Project_Global_Chrome_Upstream_Group@...iatek.com,
kuan-hsin.lee@...iatek.com, yu-chang.wang@...iatek.com,
Edward-JW Yang <edward-jw.yang@...iatek.com>
Subject: Re: [PATCH v3 1/4] clk: mediatek: Export PLL operations symbols
Il 29/09/22 13:46, Johnson Wang ha scritto:
> Export PLL operations and register functions for different type
> of clock driver used.
>
> Co-developed-by: Edward-JW Yang <edward-jw.yang@...iatek.com>
> Signed-off-by: Edward-JW Yang <edward-jw.yang@...iatek.com>
> Signed-off-by: Johnson Wang <johnson.wang@...iatek.com>
> ---
> drivers/clk/mediatek/clk-pll.c | 84 ++++++++++++++--------------------
> drivers/clk/mediatek/clk-pll.h | 56 +++++++++++++++++++++++
> 2 files changed, 90 insertions(+), 50 deletions(-)
>
> diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c
> index 54e6cfd29dfc..a4eca5fd539c 100644
> --- a/drivers/clk/mediatek/clk-pll.c
> +++ b/drivers/clk/mediatek/clk-pll.c
> @@ -27,37 +27,10 @@
>
> #define AUDPLL_TUNER_EN BIT(31)
>
> -#define POSTDIV_MASK 0x7
> -
> /* default 7 bits integer, can be overridden with pcwibits. */
> #define INTEGER_BITS 7
>
> -/*
> - * MediaTek PLLs are configured through their pcw value. The pcw value describes
> - * a divider in the PLL feedback loop which consists of 7 bits for the integer
> - * part and the remaining bits (if present) for the fractional part. Also they
> - * have a 3 bit power-of-two post divider.
> - */
> -
> -struct mtk_clk_pll {
> - struct clk_hw hw;
> - void __iomem *base_addr;
> - void __iomem *pd_addr;
> - void __iomem *pwr_addr;
> - void __iomem *tuner_addr;
> - void __iomem *tuner_en_addr;
> - void __iomem *pcw_addr;
> - void __iomem *pcw_chg_addr;
> - void __iomem *en_addr;
> - const struct mtk_pll_data *data;
> -};
> -
> -static inline struct mtk_clk_pll *to_mtk_clk_pll(struct clk_hw *hw)
> -{
> - return container_of(hw, struct mtk_clk_pll, hw);
> -}
> -
> -static int mtk_pll_is_prepared(struct clk_hw *hw)
> +int mtk_pll_is_prepared(struct clk_hw *hw)
> {
> struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
>
> @@ -161,8 +134,8 @@ static void mtk_pll_set_rate_regs(struct mtk_clk_pll *pll, u32 pcw,
> * @fin: The input frequency
> *
> */
> -static void mtk_pll_calc_values(struct mtk_clk_pll *pll, u32 *pcw, u32 *postdiv,
> - u32 freq, u32 fin)
> +void mtk_pll_calc_values(struct mtk_clk_pll *pll, u32 *pcw, u32 *postdiv,
> + u32 freq, u32 fin)
> {
> unsigned long fmin = pll->data->fmin ? pll->data->fmin : (1000 * MHZ);
> const struct mtk_pll_div_table *div_table = pll->data->div_table;
> @@ -198,8 +171,8 @@ static void mtk_pll_calc_values(struct mtk_clk_pll *pll, u32 *pcw, u32 *postdiv,
> *pcw = (u32)_pcw;
> }
>
> -static int mtk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
> - unsigned long parent_rate)
> +int mtk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long parent_rate)
> {
> struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
> u32 pcw = 0;
> @@ -211,8 +184,7 @@ static int mtk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
> return 0;
> }
>
> -static unsigned long mtk_pll_recalc_rate(struct clk_hw *hw,
> - unsigned long parent_rate)
> +unsigned long mtk_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
> {
> struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
> u32 postdiv;
> @@ -227,8 +199,8 @@ static unsigned long mtk_pll_recalc_rate(struct clk_hw *hw,
> return __mtk_pll_recalc_rate(pll, parent_rate, pcw, postdiv);
> }
>
> -static long mtk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
> - unsigned long *prate)
> +long mtk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long *prate)
> {
> struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
> u32 pcw = 0;
> @@ -239,7 +211,7 @@ static long mtk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
> return __mtk_pll_recalc_rate(pll, *prate, pcw, postdiv);
> }
>
> -static int mtk_pll_prepare(struct clk_hw *hw)
> +int mtk_pll_prepare(struct clk_hw *hw)
> {
> struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
> u32 r;
> @@ -273,7 +245,7 @@ static int mtk_pll_prepare(struct clk_hw *hw)
> return 0;
> }
>
> -static void mtk_pll_unprepare(struct clk_hw *hw)
> +void mtk_pll_unprepare(struct clk_hw *hw)
> {
> struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
> u32 r;
> @@ -301,7 +273,7 @@ static void mtk_pll_unprepare(struct clk_hw *hw)
> writel(r, pll->pwr_addr);
> }
>
> -static const struct clk_ops mtk_pll_ops = {
> +const struct clk_ops mtk_pll_ops = {
> .is_prepared = mtk_pll_is_prepared,
> .prepare = mtk_pll_prepare,
> .unprepare = mtk_pll_unprepare,
> @@ -310,18 +282,15 @@ static const struct clk_ops mtk_pll_ops = {
> .set_rate = mtk_pll_set_rate,
> };
>
> -static struct clk_hw *mtk_clk_register_pll(const struct mtk_pll_data *data,
> - void __iomem *base)
> +struct clk_hw *mtk_clk_register_pll_ops(struct mtk_clk_pll *pll,
> + const struct mtk_pll_data *data,
> + void __iomem *base,
> + const struct clk_ops *pll_ops)
> {
> - struct mtk_clk_pll *pll;
> struct clk_init_data init = {};
> int ret;
> const char *parent_name = "clk26m";
>
> - pll = kzalloc(sizeof(*pll), GFP_KERNEL);
> - if (!pll)
> - return ERR_PTR(-ENOMEM);
> -
> pll->base_addr = base + data->reg;
> pll->pwr_addr = base + data->pwr_reg;
> pll->pd_addr = base + data->pd_reg;
> @@ -343,7 +312,7 @@ static struct clk_hw *mtk_clk_register_pll(const struct mtk_pll_data *data,
>
> init.name = data->name;
> init.flags = (data->flags & PLL_AO) ? CLK_IS_CRITICAL : 0;
> - init.ops = &mtk_pll_ops;
> + init.ops = pll_ops;
> if (data->parent_name)
> init.parent_names = &data->parent_name;
> else
> @@ -360,7 +329,22 @@ static struct clk_hw *mtk_clk_register_pll(const struct mtk_pll_data *data,
> return &pll->hw;
> }
>
> -static void mtk_clk_unregister_pll(struct clk_hw *hw)
> +struct clk_hw *mtk_clk_register_pll(const struct mtk_pll_data *data,
> + void __iomem *base)
> +{
> + struct mtk_clk_pll *pll;
> + struct clk_hw *hw;
> +
> + pll = kzalloc(sizeof(*pll), GFP_KERNEL);
> + if (!pll)
> + return ERR_PTR(-ENOMEM);
> +
> + hw = mtk_clk_register_pll_ops(pll, data, base, &mtk_pll_ops);
> +
> + return hw;
> +}
> +
> +void mtk_clk_unregister_pll(struct clk_hw *hw)
> {
> struct mtk_clk_pll *pll;
>
> @@ -423,8 +407,8 @@ int mtk_clk_register_plls(struct device_node *node,
> }
> EXPORT_SYMBOL_GPL(mtk_clk_register_plls);
>
> -static __iomem void *mtk_clk_pll_get_base(struct clk_hw *hw,
> - const struct mtk_pll_data *data)
> +__iomem void *mtk_clk_pll_get_base(struct clk_hw *hw,
> + const struct mtk_pll_data *data)
> {
> struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
>
> diff --git a/drivers/clk/mediatek/clk-pll.h b/drivers/clk/mediatek/clk-pll.h
> index fe3199715688..e87ab08eea9b 100644
> --- a/drivers/clk/mediatek/clk-pll.h
> +++ b/drivers/clk/mediatek/clk-pll.h
> @@ -7,6 +7,7 @@
> #ifndef __DRV_CLK_MTK_PLL_H
> #define __DRV_CLK_MTK_PLL_H
>
> +#include <linux/clk-provider.h>
> #include <linux/types.h>
>
> struct clk_ops;
> @@ -20,6 +21,7 @@ struct mtk_pll_div_table {
>
> #define HAVE_RST_BAR BIT(0)
> #define PLL_AO BIT(1)
> +#define POSTDIV_MASK 0x7
While moving this, can you please also fixup declaring this mask as GENMASK()?
#define POSTDIV_MASK GENMASK(2, 0)
>
> struct mtk_pll_data {
> int id;
> @@ -48,10 +50,64 @@ struct mtk_pll_data {
> u8 pll_en_bit; /* Assume 0, indicates BIT(0) by default */
> };
>
> +/*
> + * MediaTek PLLs are configured through their pcw value. The pcw value describes
> + * a divider in the PLL feedback loop which consists of 7 bits for the integer
> + * part and the remaining bits (if present) for the fractional part. Also they
> + * have a 3 bit power-of-two post divider.
> + */
> +
> +struct mtk_clk_pll {
> + struct clk_hw hw;
> + void __iomem *base_addr;
> + void __iomem *pd_addr;
> + void __iomem *pwr_addr;
> + void __iomem *tuner_addr;
> + void __iomem *tuner_en_addr;
> + void __iomem *pcw_addr;
> + void __iomem *pcw_chg_addr;
> + void __iomem *en_addr;
> + const struct mtk_pll_data *data;
> +};
> +
> +
Please drop this extra newline.
Thanks,
Angelo
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