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Message-ID: <YhcAHQdtvSeROhT+@builder.lan>
Date: Wed, 23 Feb 2022 21:48:45 -0600
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Ansuel Smith <ansuelsmth@...il.com>
Cc: Andy Gross <agross@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Taniya Das <tdas@...eaurora.org>,
linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 05/16] clk: qcom: gcc-ipq806x: convert parent_names to
parent_data
On Thu 17 Feb 17:56 CST 2022, Ansuel Smith wrote:
> Convert parent_names to parent_data to modernize the driver.
> Where possible use parent_hws directly.
>
Really nice to see this kind of cleanup. Unfortunately I have two
comments below.
> Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> ---
> drivers/clk/qcom/gcc-ipq806x.c | 286 ++++++++++++++++++++-------------
> 1 file changed, 173 insertions(+), 113 deletions(-)
>
> diff --git a/drivers/clk/qcom/gcc-ipq806x.c b/drivers/clk/qcom/gcc-ipq806x.c
> index 34cddf461dba..828383c30322 100644
> --- a/drivers/clk/qcom/gcc-ipq806x.c
> +++ b/drivers/clk/qcom/gcc-ipq806x.c
> @@ -25,6 +25,10 @@
> #include "clk-hfpll.h"
> #include "reset.h"
>
> +static const struct clk_parent_data gcc_pxo[] = {
> + { .fw_name = "pxo" },
I expect that this will break booting these boards with existing dtb,
because there's not yet a clocks <&pxo_board> in the gcc node.
If you also add .name = "pxo" here that it should still fall back to map
to the board clock registered in gcc_ipq806x_probe() and once we have
passed 1-2 kernel releases we can clean out the old mapping.
> +};
> +
> static struct clk_pll pll0 = {
> .l_reg = 0x30c4,
> .m_reg = 0x30c8,
> @@ -35,7 +39,7 @@ static struct clk_pll pll0 = {
> .status_bit = 16,
> .clkr.hw.init = &(struct clk_init_data){
> .name = "pll0",
> - .parent_names = (const char *[]){ "pxo" },
> + .parent_data = gcc_pxo,
> .num_parents = 1,
> .ops = &clk_pll_ops,
> },
> @@ -46,7 +50,9 @@ static struct clk_regmap pll0_vote = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "pll0_vote",
> - .parent_names = (const char *[]){ "pll0" },
> + .parent_hws = (const struct clk_hw*[]){
> + &pll0.clkr.hw,
> + },
> .num_parents = 1,
> .ops = &clk_pll_vote_ops,
> },
> @@ -62,7 +68,7 @@ static struct clk_pll pll3 = {
> .status_bit = 16,
> .clkr.hw.init = &(struct clk_init_data){
> .name = "pll3",
> - .parent_names = (const char *[]){ "pxo" },
> + .parent_data = gcc_pxo,
> .num_parents = 1,
> .ops = &clk_pll_ops,
> },
> @@ -89,7 +95,7 @@ static struct clk_pll pll8 = {
> .status_bit = 16,
> .clkr.hw.init = &(struct clk_init_data){
> .name = "pll8",
> - .parent_names = (const char *[]){ "pxo" },
> + .parent_data = gcc_pxo,
> .num_parents = 1,
> .ops = &clk_pll_ops,
> },
> @@ -100,7 +106,9 @@ static struct clk_regmap pll8_vote = {
> .enable_mask = BIT(8),
> .hw.init = &(struct clk_init_data){
> .name = "pll8_vote",
> - .parent_names = (const char *[]){ "pll8" },
> + .parent_hws = (const struct clk_hw*[]){
> + &pll8.clkr.hw,
> + },
> .num_parents = 1,
> .ops = &clk_pll_vote_ops,
> },
> @@ -123,7 +131,7 @@ static struct hfpll_data hfpll0_data = {
> static struct clk_hfpll hfpll0 = {
> .d = &hfpll0_data,
> .clkr.hw.init = &(struct clk_init_data){
> - .parent_names = (const char *[]){ "pxo" },
> + .parent_data = gcc_pxo,
> .num_parents = 1,
> .name = "hfpll0",
> .ops = &clk_ops_hfpll,
> @@ -149,7 +157,7 @@ static struct hfpll_data hfpll1_data = {
> static struct clk_hfpll hfpll1 = {
> .d = &hfpll1_data,
> .clkr.hw.init = &(struct clk_init_data){
> - .parent_names = (const char *[]){ "pxo" },
> + .parent_data = gcc_pxo,
> .num_parents = 1,
> .name = "hfpll1",
> .ops = &clk_ops_hfpll,
> @@ -175,7 +183,7 @@ static struct hfpll_data hfpll_l2_data = {
> static struct clk_hfpll hfpll_l2 = {
> .d = &hfpll_l2_data,
> .clkr.hw.init = &(struct clk_init_data){
> - .parent_names = (const char *[]){ "pxo" },
> + .parent_data = gcc_pxo,
> .num_parents = 1,
> .name = "hfpll_l2",
> .ops = &clk_ops_hfpll,
> @@ -194,7 +202,7 @@ static struct clk_pll pll14 = {
> .status_bit = 16,
> .clkr.hw.init = &(struct clk_init_data){
> .name = "pll14",
> - .parent_names = (const char *[]){ "pxo" },
> + .parent_data = gcc_pxo,
> .num_parents = 1,
> .ops = &clk_pll_ops,
> },
> @@ -205,7 +213,9 @@ static struct clk_regmap pll14_vote = {
> .enable_mask = BIT(14),
> .hw.init = &(struct clk_init_data){
> .name = "pll14_vote",
> - .parent_names = (const char *[]){ "pll14" },
> + .parent_hws = (const struct clk_hw*[]){
> + &pll14.clkr.hw,
> + },
> .num_parents = 1,
> .ops = &clk_pll_vote_ops,
> },
> @@ -238,7 +248,7 @@ static struct clk_pll pll18 = {
> .freq_tbl = pll18_freq_tbl,
> .clkr.hw.init = &(struct clk_init_data){
> .name = "pll18",
> - .parent_names = (const char *[]){ "pxo" },
> + .parent_data = gcc_pxo,
> .num_parents = 1,
> .ops = &clk_pll_ops,
> },
> @@ -259,9 +269,9 @@ static const struct parent_map gcc_pxo_pll8_map[] = {
> { P_PLL8, 3 }
> };
>
> -static const char * const gcc_pxo_pll8[] = {
> - "pxo",
> - "pll8_vote",
> +static const struct clk_parent_data gcc_pxo_pll8[] = {
> + { .fw_name = "pxo" },
> + { .hw = &pll8_vote.hw },
> };
>
> static const struct parent_map gcc_pxo_pll8_cxo_map[] = {
> @@ -270,10 +280,10 @@ static const struct parent_map gcc_pxo_pll8_cxo_map[] = {
> { P_CXO, 5 }
> };
>
> -static const char * const gcc_pxo_pll8_cxo[] = {
> - "pxo",
> - "pll8_vote",
> - "cxo",
> +static const struct clk_parent_data gcc_pxo_pll8_cxo[] = {
> + { .fw_name = "pxo" },
> + { .hw = &pll8_vote.hw },
> + { .fw_name = "cxo" },
As with "pxo", I think you need a .name = "cxo" here as well.
Regards,
Bjorn
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