linux-kernel - [PATCH v4 2/2] clk: mediatek: add infracfg reset controller for mt7988

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Message-Id: <20240201182409.39878-3-linux@fw-web.de>
Date: Thu,  1 Feb 2024 19:24:09 +0100
From: Frank Wunderlich <linux@...web.de>
To: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: Frank Wunderlich <frank-w@...lic-files.de>,
	Sam Shih <sam.shih@...iatek.com>,
	Daniel Golle <daniel@...rotopia.org>,
	linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH v4 2/2] clk: mediatek: add infracfg reset controller for mt7988

From: Frank Wunderlich <frank-w@...lic-files.de>

Infracfg can also operate as reset controller, add support for it.

Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
v4: unchanged
v3:
- start with RST0 (LVTS is in RST1)
- rename reset offset to contain SOC to not collide with constants
  defined in reset.h
---
 drivers/clk/mediatek/clk-mt7988-infracfg.c | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mt7988-infracfg.c b/drivers/clk/mediatek/clk-mt7988-infracfg.c
index 8011ef278bea..449041f8abbc 100644
--- a/drivers/clk/mediatek/clk-mt7988-infracfg.c
+++ b/drivers/clk/mediatek/clk-mt7988-infracfg.c
@@ -14,6 +14,10 @@
 #include "clk-gate.h"
 #include "clk-mux.h"
 #include <dt-bindings/clock/mediatek,mt7988-clk.h>
+#include <dt-bindings/reset/mediatek,mt7988-resets.h>
+
+#define	MT7988_INFRA_RST0_SET_OFFSET	0x70
+#define	MT7988_INFRA_RST1_SET_OFFSET	0x80
 
 static DEFINE_SPINLOCK(mt7988_clk_lock);
 
@@ -249,12 +253,31 @@ static const struct mtk_gate infra_clks[] = {
 	GATE_INFRA3(CLK_INFRA_133M_PCIE_CK_P3, "infra_133m_pcie_ck_p3", "sysaxi_sel", 31),
 };
 
+static u16 infra_rst_ofs[] = {
+	MT7988_INFRA_RST0_SET_OFFSET,
+	MT7988_INFRA_RST1_SET_OFFSET,
+};
+
+static u16 infra_idx_map[] = {
+	[MT7988_INFRA_RST0_PEXTP_MAC_SWRST] = 0 * RST_NR_PER_BANK + 6,
+	[MT7988_INFRA_RST1_THERM_CTRL_SWRST] = 1 * RST_NR_PER_BANK + 9,
+};
+
+static struct mtk_clk_rst_desc infra_rst_desc = {
+	.version = MTK_RST_SET_CLR,
+	.rst_bank_ofs = infra_rst_ofs,
+	.rst_bank_nr = ARRAY_SIZE(infra_rst_ofs),
+	.rst_idx_map = infra_idx_map,
+	.rst_idx_map_nr = ARRAY_SIZE(infra_idx_map),
+};
+
 static const struct mtk_clk_desc infra_desc = {
 	.clks = infra_clks,
 	.num_clks = ARRAY_SIZE(infra_clks),
 	.mux_clks = infra_muxes,
 	.num_mux_clks = ARRAY_SIZE(infra_muxes),
 	.clk_lock = &mt7988_clk_lock,
+	.rst_desc = &infra_rst_desc,
 };
 
 static const struct of_device_id of_match_clk_mt7988_infracfg[] = {
-- 
2.34.1