[PATCH v10 07/12] clk: mmp: Add Marvell PXA1908 APMU driver

[Duje Mihanović via B4 Relay]

From: Duje Mihanović <duje.mihanovic at skole.hr>

Add driver for the APMU controller block found on Marvell's PXA1908 SoC.
This driver is incomplete, lacking support for (at least) GPU, VPU, DSI
and CCIC (camera related) clocks.

Signed-off-by: Duje Mihanović <duje.mihanovic at skole.hr>
---
 drivers/clk/mmp/Makefile           |   2 +-
 drivers/clk/mmp/clk-pxa1908-apmu.c | 123 +++++++++++++++++++++++++++++++++++++
 2 files changed, 124 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/mmp/Makefile b/drivers/clk/mmp/Makefile
index 038bcd4d035e..a8b1a4b08824 100644
--- a/drivers/clk/mmp/Makefile
+++ b/drivers/clk/mmp/Makefile
@@ -11,4 +11,4 @@ obj-$(CONFIG_MACH_MMP_DT) += clk-of-pxa168.o clk-of-pxa910.o
 obj-$(CONFIG_COMMON_CLK_MMP2) += clk-of-mmp2.o clk-pll.o pwr-island.o
 obj-$(CONFIG_COMMON_CLK_MMP2_AUDIO) += clk-audio.o
 
-obj-$(CONFIG_ARCH_MMP) += clk-of-pxa1928.o clk-pxa1908-apbc.o clk-pxa1908-apbcp.o
+obj-$(CONFIG_ARCH_MMP) += clk-of-pxa1928.o clk-pxa1908-apbc.o clk-pxa1908-apbcp.o clk-pxa1908-apmu.o
diff --git a/drivers/clk/mmp/clk-pxa1908-apmu.c b/drivers/clk/mmp/clk-pxa1908-apmu.c
new file mode 100644
index 000000000000..693254539063
--- /dev/null
+++ b/drivers/clk/mmp/clk-pxa1908-apmu.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/bits.h>
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/units.h>
+
+#include <dt-bindings/clock/marvell,pxa1908.h>
+
+#include "clk.h"
+
+#define APMU_CLK_GATE_CTRL	0x40
+#define APMU_CCIC1		0x24
+#define APMU_ISP		0x38
+#define APMU_DSI1		0x44
+#define APMU_DISP1		0x4c
+#define APMU_CCIC0		0x50
+#define APMU_SDH0		0x54
+#define APMU_SDH1		0x58
+#define APMU_USB		0x5c
+#define APMU_NF			0x60
+#define APMU_VPU		0xa4
+#define APMU_GC			0xcc
+#define APMU_SDH2		0xe0
+#define APMU_GC2D		0xf4
+#define APMU_TRACE		0x108
+#define APMU_DVC_DFC_DEBUG	0x140
+
+#define APMU_NR_CLKS		17
+
+struct pxa1908_clk_unit {
+	struct mmp_clk_unit unit;
+	void __iomem *base;
+};
+
+static DEFINE_SPINLOCK(pll1_lock);
+static struct mmp_param_general_gate_clk pll1_gate_clks[] = {
+	{PXA1908_CLK_PLL1_D2_GATE, "pll1_d2_gate", "pll1_d2", 0, APMU_CLK_GATE_CTRL, 29, 0, &pll1_lock},
+	{PXA1908_CLK_PLL1_416_GATE, "pll1_416_gate", "pll1_416", 0, APMU_CLK_GATE_CTRL, 27, 0, &pll1_lock},
+	{PXA1908_CLK_PLL1_624_GATE, "pll1_624_gate", "pll1_624", 0, APMU_CLK_GATE_CTRL, 26, 0, &pll1_lock},
+	{PXA1908_CLK_PLL1_832_GATE, "pll1_832_gate", "pll1_832", 0, APMU_CLK_GATE_CTRL, 30, 0, &pll1_lock},
+	{PXA1908_CLK_PLL1_1248_GATE, "pll1_1248_gate", "pll1_1248", 0, APMU_CLK_GATE_CTRL, 28, 0, &pll1_lock},
+};
+
+static DEFINE_SPINLOCK(sdh0_lock);
+static DEFINE_SPINLOCK(sdh1_lock);
+static DEFINE_SPINLOCK(sdh2_lock);
+
+static const char * const sdh_parent_names[] = {"pll1_416", "pll1_624"};
+
+static struct mmp_clk_mix_config sdh_mix_config = {
+	.reg_info = DEFINE_MIX_REG_INFO(3, 8, 2, 6, 11),
+};
+
+static struct mmp_param_gate_clk apmu_gate_clks[] = {
+	{PXA1908_CLK_USB, "usb_clk", NULL, 0, APMU_USB, 0x9, 0x9, 0x1, 0, NULL},
+	{PXA1908_CLK_SDH0, "sdh0_clk", "sdh0_mix_clk", CLK_SET_RATE_PARENT | CLK_SET_RATE_UNGATE, APMU_SDH0, 0x12, 0x12, 0x0, 0, &sdh0_lock},
+	{PXA1908_CLK_SDH1, "sdh1_clk", "sdh1_mix_clk", CLK_SET_RATE_PARENT | CLK_SET_RATE_UNGATE, APMU_SDH1, 0x12, 0x12, 0x0, 0, &sdh1_lock},
+	{PXA1908_CLK_SDH2, "sdh2_clk", "sdh2_mix_clk", CLK_SET_RATE_PARENT | CLK_SET_RATE_UNGATE, APMU_SDH2, 0x12, 0x12, 0x0, 0, &sdh2_lock}
+};
+
+static void pxa1908_axi_periph_clk_init(struct pxa1908_clk_unit *pxa_unit)
+{
+	struct mmp_clk_unit *unit = &pxa_unit->unit;
+
+	mmp_register_general_gate_clks(unit, pll1_gate_clks,
+			pxa_unit->base, ARRAY_SIZE(pll1_gate_clks));
+
+	sdh_mix_config.reg_info.reg_clk_ctrl = pxa_unit->base + APMU_SDH0;
+	mmp_clk_register_mix(NULL, "sdh0_mix_clk", sdh_parent_names,
+			ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT,
+			&sdh_mix_config, &sdh0_lock);
+	sdh_mix_config.reg_info.reg_clk_ctrl = pxa_unit->base + APMU_SDH1;
+	mmp_clk_register_mix(NULL, "sdh1_mix_clk", sdh_parent_names,
+			ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT,
+			&sdh_mix_config, &sdh1_lock);
+	sdh_mix_config.reg_info.reg_clk_ctrl = pxa_unit->base + APMU_SDH2;
+	mmp_clk_register_mix(NULL, "sdh2_mix_clk", sdh_parent_names,
+			ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT,
+			&sdh_mix_config, &sdh2_lock);
+
+	mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->base,
+			ARRAY_SIZE(apmu_gate_clks));
+}
+
+static int pxa1908_apmu_probe(struct platform_device *pdev)
+{
+	struct pxa1908_clk_unit *pxa_unit;
+
+	pxa_unit = devm_kzalloc(&pdev->dev, sizeof(*pxa_unit), GFP_KERNEL);
+	if (IS_ERR(pxa_unit))
+		return PTR_ERR(pxa_unit);
+
+	pxa_unit->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(pxa_unit->base))
+		return PTR_ERR(pxa_unit->base);
+
+	mmp_clk_init(pdev->dev.of_node, &pxa_unit->unit, APMU_NR_CLKS);
+
+	pxa1908_axi_periph_clk_init(pxa_unit);
+
+	return 0;
+}
+
+static const struct of_device_id pxa1908_apmu_match_table[] = {
+	{ .compatible = "marvell,pxa1908-apmu" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pxa1908_apmu_match_table);
+
+static struct platform_driver pxa1908_apmu_driver = {
+	.probe = pxa1908_apmu_probe,
+	.driver = {
+		.name = "pxa1908-apmu",
+		.of_match_table = pxa1908_apmu_match_table
+	}
+};
+module_platform_driver(pxa1908_apmu_driver);
+
+MODULE_AUTHOR("Duje Mihanović <duje.mihanovic at skole.hr>");
+MODULE_DESCRIPTION("Marvell PXA1908 APMU Clock Driver");
+MODULE_LICENSE("GPL");

-- 
2.44.0