linux-kernel - [PATCHv1 02/19] clk: rockchip: add register offset of the cores select parent

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Date:   Fri, 22 Apr 2022 19:09:03 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-clk@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...ts.collabora.co.uk,
        Elaine Zhang <zhangqing@...k-chips.com>, kernel@...labora.com,
        Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: [PATCHv1 02/19] clk: rockchip: add register offset of the cores select parent

From: Elaine Zhang <zhangqing@...k-chips.com>

The cores select parent register is special on RK3588.

Signed-off-by: Elaine Zhang <zhangqing@...k-chips.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
---
 drivers/clk/rockchip/clk-cpu.c | 28 ++++++++++++++++++++--------
 drivers/clk/rockchip/clk.h     |  3 +++
 2 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/drivers/clk/rockchip/clk-cpu.c b/drivers/clk/rockchip/clk-cpu.c
index 47288197c9d7..11aa2259b532 100644
--- a/drivers/clk/rockchip/clk-cpu.c
+++ b/drivers/clk/rockchip/clk-cpu.c
@@ -166,10 +166,16 @@ static int rockchip_cpuclk_pre_rate_change(struct rockchip_cpuclk *cpuclk,
 		}
 	}
 	/* select alternate parent */
-	writel(HIWORD_UPDATE(reg_data->mux_core_alt,
-			     reg_data->mux_core_mask,
-			     reg_data->mux_core_shift),
-	       cpuclk->reg_base + reg_data->core_reg[0]);
+	if (reg_data->mux_core_reg)
+		writel(HIWORD_UPDATE(reg_data->mux_core_alt,
+				     reg_data->mux_core_mask,
+				     reg_data->mux_core_shift),
+		       cpuclk->reg_base + reg_data->mux_core_reg);
+	else
+		writel(HIWORD_UPDATE(reg_data->mux_core_alt,
+				     reg_data->mux_core_mask,
+				     reg_data->mux_core_shift),
+		       cpuclk->reg_base + reg_data->core_reg[0]);
 
 	spin_unlock_irqrestore(cpuclk->lock, flags);
 	return 0;
@@ -202,10 +208,16 @@ static int rockchip_cpuclk_post_rate_change(struct rockchip_cpuclk *cpuclk,
 	 * primary parent by the extra dividers that were needed for the alt.
 	 */
 
-	writel(HIWORD_UPDATE(reg_data->mux_core_main,
-			     reg_data->mux_core_mask,
-			     reg_data->mux_core_shift),
-	       cpuclk->reg_base + reg_data->core_reg[0]);
+	if (reg_data->mux_core_reg)
+		writel(HIWORD_UPDATE(reg_data->mux_core_main,
+				     reg_data->mux_core_mask,
+				     reg_data->mux_core_shift),
+		       cpuclk->reg_base + reg_data->mux_core_reg);
+	else
+		writel(HIWORD_UPDATE(reg_data->mux_core_main,
+				     reg_data->mux_core_mask,
+				     reg_data->mux_core_shift),
+		       cpuclk->reg_base + reg_data->core_reg[0]);
 
 	/* remove dividers */
 	for (i = 0; i < reg_data->num_cores; i++) {
diff --git a/drivers/clk/rockchip/clk.h b/drivers/clk/rockchip/clk.h
index 7aa45cc70287..6aece7f07a7d 100644
--- a/drivers/clk/rockchip/clk.h
+++ b/drivers/clk/rockchip/clk.h
@@ -370,6 +370,8 @@ struct rockchip_cpuclk_rate_table {
  * @div_core_shift[]:	cores divider offset used to divide the pll value
  * @div_core_mask[]:	cores divider mask
  * @num_cores:	number of cpu cores
+ * @mux_core_reg:       register offset of the cores select parent
+ * @mux_core_alt:       mux value to select alternate parent
  * @mux_core_main:	mux value to select main parent of core
  * @mux_core_shift:	offset of the core multiplexer
  * @mux_core_mask:	core multiplexer mask
@@ -379,6 +381,7 @@ struct rockchip_cpuclk_reg_data {
 	u8	div_core_shift[ROCKCHIP_CPUCLK_MAX_CORES];
 	u32	div_core_mask[ROCKCHIP_CPUCLK_MAX_CORES];
 	int	num_cores;
+	int	mux_core_reg;
 	u8	mux_core_alt;
 	u8	mux_core_main;
 	u8	mux_core_shift;
-- 
2.35.1