linux-kernel - [PATCHv1 2/2] clk: samsung: exynos542x: Move FSYS2 subsystem clocks to its sub-CMU

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Message-Id: <20200212120237.1332-3-linux.amoon@gmail.com>
Date:   Wed, 12 Feb 2020 12:02:37 +0000
From:   Anand Moon <linux.amoon@...il.com>
To:     Sylwester Nawrocki <s.nawrocki@...sung.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: [PATCHv1 2/2] clk: samsung: exynos542x: Move FSYS2 subsystem clocks to its sub-CMU

Move FSYS2 clk setting to sub-CMU block to support power domain on/off
sequences for mmc driver.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
Note: This patch might be missing some more setting
as suspend/resume feature is broken.
I could not resolve this issue at my end, any input or
suggetion to improve this code.
---
 drivers/clk/samsung/clk-exynos5420.c | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index c9e5a1fb6653..3597e8d62445 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -1035,9 +1035,6 @@ static const struct samsung_gate_clock exynos5x_gate_clks[] __initconst = {
 	GATE(CLK_PDMA1, "pdma1", "aclk200_fsys", GATE_BUS_FSYS0, 2, 0, 0),
 	GATE(CLK_UFS, "ufs", "aclk200_fsys2", GATE_BUS_FSYS0, 3, 0, 0),
 	GATE(CLK_RTIC, "rtic", "aclk200_fsys", GATE_IP_FSYS, 9, 0, 0),
-	GATE(CLK_MMC0, "mmc0", "aclk200_fsys2", GATE_IP_FSYS, 12, 0, 0),
-	GATE(CLK_MMC1, "mmc1", "aclk200_fsys2", GATE_IP_FSYS, 13, 0, 0),
-	GATE(CLK_MMC2, "mmc2", "aclk200_fsys2", GATE_IP_FSYS, 14, 0, 0),
 	GATE(CLK_SROMC, "sromc", "aclk200_fsys2",
 			GATE_IP_FSYS, 17, CLK_IGNORE_UNUSED, 0),
 	GATE(CLK_USBH20, "usbh20", "aclk200_fsys", GATE_IP_FSYS, 18, 0, 0),
@@ -1258,6 +1255,17 @@ static struct exynos5_subcmu_reg_dump exynos5x_gsc_suspend_regs[] = {
 	{ DIV2_RATIO0, 0, 0x30 },	/* DIV dout_gscl_blk_300 */
 };
 
+static const struct samsung_gate_clock exynos5x_fsys2_gate_clks[] __initconst = {
+	GATE(CLK_MMC0, "mmc0", "aclk200_fsys2", GATE_IP_FSYS, 12, 0, 0),
+	GATE(CLK_MMC1, "mmc1", "aclk200_fsys2", GATE_IP_FSYS, 13, 0, 0),
+	GATE(CLK_MMC2, "mmc2", "aclk200_fsys2", GATE_IP_FSYS, 14, 0, 0),
+};
+
+static struct exynos5_subcmu_reg_dump exynos5x_fsys2_suspend_regs[] = {
+	{ GATE_IP_FSYS, 0xff, 0xff },   /* FSYS gates */
+	{ SRC_TOP3, 0, BIT(12) },       /* MUX_ACLK_200_FSYS2_SEL */
+};
+
 static const struct samsung_gate_clock exynos5x_g3d_gate_clks[] __initconst = {
 	GATE(CLK_G3D, "g3d", "mout_user_aclk_g3d", GATE_IP_G3D, 9,
 	     CLK_SET_RATE_PARENT, 0),
@@ -1376,12 +1384,21 @@ static const struct exynos5_subcmu_info exynos5800_mau_subcmu = {
 	.pd_name	= "MAU",
 };
 
+static const struct exynos5_subcmu_info exynos5x_fsys2_subcmu = {
+	.gate_clks	= exynos5x_fsys2_gate_clks,
+	.nr_gate_clks	= ARRAY_SIZE(exynos5x_fsys2_gate_clks),
+	.suspend_regs	= exynos5x_fsys2_suspend_regs,
+	.nr_suspend_regs = ARRAY_SIZE(exynos5x_fsys2_suspend_regs),
+	.pd_name	= "FSYS2",
+};
+
 static const struct exynos5_subcmu_info *exynos5x_subcmus[] = {
 	&exynos5x_disp_subcmu,
 	&exynos5x_gsc_subcmu,
 	&exynos5x_g3d_subcmu,
 	&exynos5x_mfc_subcmu,
 	&exynos5x_mscl_subcmu,
+	&exynos5x_fsys2_subcmu,
 };
 
 static const struct exynos5_subcmu_info *exynos5800_subcmus[] = {
@@ -1391,6 +1408,7 @@ static const struct exynos5_subcmu_info *exynos5800_subcmus[] = {
 	&exynos5x_mfc_subcmu,
 	&exynos5x_mscl_subcmu,
 	&exynos5800_mau_subcmu,
+	&exynos5x_fsys2_subcmu,
 };
 
 static const struct samsung_pll_rate_table exynos5420_pll2550x_24mhz_tbl[] __initconst = {
-- 
2.25.0