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Message-Id: <20220121112238.47281-2-abel.vesa@nxp.com>
Date: Fri, 21 Jan 2022 13:22:36 +0200
From: Abel Vesa <abel.vesa@....com>
To: Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
Lucas Stach <l.stach@...gutronix.de>
Cc: Pengutronix Kernel Team <kernel@...gutronix.de>,
NXP Linux Team <linux-imx@....com>,
Frieder Schrempf <frieder.schrempf@...tron.de>,
Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
linux-arm-kernel@...ts.infradead.org
Subject: [RFC 1/3] soc: imx: make i.MX8MM BLK CTRL a separate driver
The imx8m-blk-ctrl driver was increasing in size with every new BLK CTRL
addition for every SoC. Lets split the SoC specific parts into separate
drivers. Do that for i.MX8MM now.
Signed-off-by: Abel Vesa <abel.vesa@....com>
---
drivers/soc/imx/Kconfig | 7 +
drivers/soc/imx/Makefile | 1 +
drivers/soc/imx/imx8m-blk-ctrl.c | 210 +-----------------------------
drivers/soc/imx/imx8m-blk-ctrl.h | 72 ++++++++++
drivers/soc/imx/imx8mm-blk-ctrl.c | 173 ++++++++++++++++++++++++
5 files changed, 257 insertions(+), 206 deletions(-)
create mode 100644 drivers/soc/imx/imx8m-blk-ctrl.h
create mode 100644 drivers/soc/imx/imx8mm-blk-ctrl.c
diff --git a/drivers/soc/imx/Kconfig b/drivers/soc/imx/Kconfig
index a840494e849a..b0cc53f3fc2c 100644
--- a/drivers/soc/imx/Kconfig
+++ b/drivers/soc/imx/Kconfig
@@ -20,4 +20,11 @@ config SOC_IMX8M
support, it will provide the SoC info like SoC family,
ID and revision etc.
+config SOC_IMX8MM_BLK_CTRL
+ bool "i.MX8MM SoC BLK CTRL support"
+ depends on SOC_IMX8M
+ help
+ If you say yes here you get support for the NXP i.MX8MM BLK CTRL
+ support.
+
endmenu
diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
index 8a707077914c..06c2970e6308 100644
--- a/drivers/soc/imx/Makefile
+++ b/drivers/soc/imx/Makefile
@@ -6,3 +6,4 @@ obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o
obj-$(CONFIG_SOC_IMX8M) += imx8m-blk-ctrl.o
+obj-$(CONFIG_SOC_IMX8MM_BLK_CTRL) += imx8mm-blk-ctrl.o
diff --git a/drivers/soc/imx/imx8m-blk-ctrl.c b/drivers/soc/imx/imx8m-blk-ctrl.c
index 511e74f0db8a..599b2a9a38bb 100644
--- a/drivers/soc/imx/imx8m-blk-ctrl.c
+++ b/drivers/soc/imx/imx8m-blk-ctrl.c
@@ -4,67 +4,11 @@
* Copyright 2021 Pengutronix, Lucas Stach <kernel@...gutronix.de>
*/
-#include <linux/device.h>
-#include <linux/module.h>
#include <linux/of_device.h>
-#include <linux/platform_device.h>
-#include <linux/pm_domain.h>
-#include <linux/pm_runtime.h>
-#include <linux/regmap.h>
-#include <linux/clk.h>
-#include <dt-bindings/power/imx8mm-power.h>
#include <dt-bindings/power/imx8mn-power.h>
-#define BLK_SFT_RSTN 0x0
-#define BLK_CLK_EN 0x4
-#define BLK_MIPI_RESET_DIV 0x8 /* Mini/Nano DISPLAY_BLK_CTRL only */
-
-struct imx8m_blk_ctrl_domain;
-
-struct imx8m_blk_ctrl {
- struct device *dev;
- struct notifier_block power_nb;
- struct device *bus_power_dev;
- struct regmap *regmap;
- struct imx8m_blk_ctrl_domain *domains;
- struct genpd_onecell_data onecell_data;
-};
-
-struct imx8m_blk_ctrl_domain_data {
- const char *name;
- const char * const *clk_names;
- int num_clks;
- const char *gpc_name;
- u32 rst_mask;
- u32 clk_mask;
-
- /*
- * i.MX8M Mini and Nano have a third DISPLAY_BLK_CTRL register
- * which is used to control the reset for the MIPI Phy.
- * Since it's only present in certain circumstances,
- * an if-statement should be used before setting and clearing this
- * register.
- */
- u32 mipi_phy_rst_mask;
-};
-
-#define DOMAIN_MAX_CLKS 3
-
-struct imx8m_blk_ctrl_domain {
- struct generic_pm_domain genpd;
- const struct imx8m_blk_ctrl_domain_data *data;
- struct clk_bulk_data clks[DOMAIN_MAX_CLKS];
- struct device *power_dev;
- struct imx8m_blk_ctrl *bc;
-};
-
-struct imx8m_blk_ctrl_data {
- int max_reg;
- notifier_fn_t power_notifier_fn;
- const struct imx8m_blk_ctrl_domain_data *domains;
- int num_domains;
-};
+#include "imx8m-blk-ctrl.h"
static inline struct imx8m_blk_ctrl_domain *
to_imx8m_blk_ctrl_domain(struct generic_pm_domain *genpd)
@@ -165,7 +109,7 @@ imx8m_blk_ctrl_xlate(struct of_phandle_args *args, void *data)
static struct lock_class_key blk_ctrl_genpd_lock_class;
-static int imx8m_blk_ctrl_probe(struct platform_device *pdev)
+int imx8m_blk_ctrl_probe(struct platform_device *pdev)
{
const struct imx8m_blk_ctrl_data *bc_data;
struct device *dev = &pdev->dev;
@@ -299,7 +243,7 @@ static int imx8m_blk_ctrl_probe(struct platform_device *pdev)
return ret;
}
-static int imx8m_blk_ctrl_remove(struct platform_device *pdev)
+int imx8m_blk_ctrl_remove(struct platform_device *pdev)
{
struct imx8m_blk_ctrl *bc = dev_get_drvdata(&pdev->dev);
int i;
@@ -375,150 +319,10 @@ static int imx8m_blk_ctrl_resume(struct device *dev)
}
#endif
-static const struct dev_pm_ops imx8m_blk_ctrl_pm_ops = {
+const struct dev_pm_ops imx8m_blk_ctrl_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(imx8m_blk_ctrl_suspend, imx8m_blk_ctrl_resume)
};
-static int imx8mm_vpu_power_notifier(struct notifier_block *nb,
- unsigned long action, void *data)
-{
- struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
- power_nb);
-
- if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
- return NOTIFY_OK;
-
- /*
- * The ADB in the VPUMIX domain has no separate reset and clock
- * enable bits, but is ungated together with the VPU clocks. To
- * allow the handshake with the GPC to progress we put the VPUs
- * in reset and ungate the clocks.
- */
- regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, BIT(0) | BIT(1) | BIT(2));
- regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(0) | BIT(1) | BIT(2));
-
- if (action == GENPD_NOTIFY_ON) {
- /*
- * On power up we have no software backchannel to the GPC to
- * wait for the ADB handshake to happen, so we just delay for a
- * bit. On power down the GPC driver waits for the handshake.
- */
- udelay(5);
-
- /* set "fuse" bits to enable the VPUs */
- regmap_set_bits(bc->regmap, 0x8, 0xffffffff);
- regmap_set_bits(bc->regmap, 0xc, 0xffffffff);
- regmap_set_bits(bc->regmap, 0x10, 0xffffffff);
- regmap_set_bits(bc->regmap, 0x14, 0xffffffff);
- }
-
- return NOTIFY_OK;
-}
-
-static const struct imx8m_blk_ctrl_domain_data imx8mm_vpu_blk_ctl_domain_data[] = {
- [IMX8MM_VPUBLK_PD_G1] = {
- .name = "vpublk-g1",
- .clk_names = (const char *[]){ "g1", },
- .num_clks = 1,
- .gpc_name = "g1",
- .rst_mask = BIT(1),
- .clk_mask = BIT(1),
- },
- [IMX8MM_VPUBLK_PD_G2] = {
- .name = "vpublk-g2",
- .clk_names = (const char *[]){ "g2", },
- .num_clks = 1,
- .gpc_name = "g2",
- .rst_mask = BIT(0),
- .clk_mask = BIT(0),
- },
- [IMX8MM_VPUBLK_PD_H1] = {
- .name = "vpublk-h1",
- .clk_names = (const char *[]){ "h1", },
- .num_clks = 1,
- .gpc_name = "h1",
- .rst_mask = BIT(2),
- .clk_mask = BIT(2),
- },
-};
-
-static const struct imx8m_blk_ctrl_data imx8mm_vpu_blk_ctl_dev_data = {
- .max_reg = 0x18,
- .power_notifier_fn = imx8mm_vpu_power_notifier,
- .domains = imx8mm_vpu_blk_ctl_domain_data,
- .num_domains = ARRAY_SIZE(imx8mm_vpu_blk_ctl_domain_data),
-};
-
-static int imx8mm_disp_power_notifier(struct notifier_block *nb,
- unsigned long action, void *data)
-{
- struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
- power_nb);
-
- if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
- return NOTIFY_OK;
-
- /* Enable bus clock and deassert bus reset */
- regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(12));
- regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(6));
-
- /*
- * On power up we have no software backchannel to the GPC to
- * wait for the ADB handshake to happen, so we just delay for a
- * bit. On power down the GPC driver waits for the handshake.
- */
- if (action == GENPD_NOTIFY_ON)
- udelay(5);
-
-
- return NOTIFY_OK;
-}
-
-static const struct imx8m_blk_ctrl_domain_data imx8mm_disp_blk_ctl_domain_data[] = {
- [IMX8MM_DISPBLK_PD_CSI_BRIDGE] = {
- .name = "dispblk-csi-bridge",
- .clk_names = (const char *[]){ "csi-bridge-axi", "csi-bridge-apb",
- "csi-bridge-core", },
- .num_clks = 3,
- .gpc_name = "csi-bridge",
- .rst_mask = BIT(0) | BIT(1) | BIT(2),
- .clk_mask = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5),
- },
- [IMX8MM_DISPBLK_PD_LCDIF] = {
- .name = "dispblk-lcdif",
- .clk_names = (const char *[]){ "lcdif-axi", "lcdif-apb", "lcdif-pix", },
- .num_clks = 3,
- .gpc_name = "lcdif",
- .clk_mask = BIT(6) | BIT(7),
- },
- [IMX8MM_DISPBLK_PD_MIPI_DSI] = {
- .name = "dispblk-mipi-dsi",
- .clk_names = (const char *[]){ "dsi-pclk", "dsi-ref", },
- .num_clks = 2,
- .gpc_name = "mipi-dsi",
- .rst_mask = BIT(5),
- .clk_mask = BIT(8) | BIT(9),
- .mipi_phy_rst_mask = BIT(17),
- },
- [IMX8MM_DISPBLK_PD_MIPI_CSI] = {
- .name = "dispblk-mipi-csi",
- .clk_names = (const char *[]){ "csi-aclk", "csi-pclk" },
- .num_clks = 2,
- .gpc_name = "mipi-csi",
- .rst_mask = BIT(3) | BIT(4),
- .clk_mask = BIT(10) | BIT(11),
- .mipi_phy_rst_mask = BIT(16),
- },
-};
-
-static const struct imx8m_blk_ctrl_data imx8mm_disp_blk_ctl_dev_data = {
- .max_reg = 0x2c,
- .power_notifier_fn = imx8mm_disp_power_notifier,
- .domains = imx8mm_disp_blk_ctl_domain_data,
- .num_domains = ARRAY_SIZE(imx8mm_disp_blk_ctl_domain_data),
-};
-
-
static int imx8mn_disp_power_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
@@ -591,12 +395,6 @@ static const struct imx8m_blk_ctrl_data imx8mn_disp_blk_ctl_dev_data = {
static const struct of_device_id imx8m_blk_ctrl_of_match[] = {
{
- .compatible = "fsl,imx8mm-vpu-blk-ctrl",
- .data = &imx8mm_vpu_blk_ctl_dev_data
- }, {
- .compatible = "fsl,imx8mm-disp-blk-ctrl",
- .data = &imx8mm_disp_blk_ctl_dev_data
- }, {
.compatible = "fsl,imx8mn-disp-blk-ctrl",
.data = &imx8mn_disp_blk_ctl_dev_data
}, {
diff --git a/drivers/soc/imx/imx8m-blk-ctrl.h b/drivers/soc/imx/imx8m-blk-ctrl.h
new file mode 100644
index 000000000000..618b3429bb69
--- /dev/null
+++ b/drivers/soc/imx/imx8m-blk-ctrl.h
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Copyright 2021 Pengutronix, Lucas Stach <kernel@...gutronix.de>
+ * Copyright 2022 NXP, Abel Vesa <abel.vesa@....com>
+ */
+
+#ifndef __IMX_BLK_CTRL_H
+#define __IMX_BLK_CTRL_H
+
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#define BLK_SFT_RSTN 0x0
+#define BLK_CLK_EN 0x4
+#define BLK_MIPI_RESET_DIV 0x8 /* Mini/Nano DISPLAY_BLK_CTRL only */
+
+struct imx8m_blk_ctrl_domain;
+
+struct imx8m_blk_ctrl {
+ struct device *dev;
+ struct notifier_block power_nb;
+ struct device *bus_power_dev;
+ struct regmap *regmap;
+ struct imx8m_blk_ctrl_domain *domains;
+ struct genpd_onecell_data onecell_data;
+};
+
+struct imx8m_blk_ctrl_domain_data {
+ const char *name;
+ const char * const *clk_names;
+ int num_clks;
+ const char *gpc_name;
+ u32 rst_mask;
+ u32 clk_mask;
+
+ /*
+ * i.MX8M Mini and Nano have a third DISPLAY_BLK_CTRL register
+ * which is used to control the reset for the MIPI Phy.
+ * Since it's only present in certain circumstances,
+ * an if-statement should be used before setting and clearing this
+ * register.
+ */
+ u32 mipi_phy_rst_mask;
+};
+
+#define DOMAIN_MAX_CLKS 3
+
+struct imx8m_blk_ctrl_domain {
+ struct generic_pm_domain genpd;
+ const struct imx8m_blk_ctrl_domain_data *data;
+ struct clk_bulk_data clks[DOMAIN_MAX_CLKS];
+ struct device *power_dev;
+ struct imx8m_blk_ctrl *bc;
+};
+
+struct imx8m_blk_ctrl_data {
+ int max_reg;
+ notifier_fn_t power_notifier_fn;
+ const struct imx8m_blk_ctrl_domain_data *domains;
+ int num_domains;
+};
+
+extern const struct dev_pm_ops imx8m_blk_ctrl_pm_ops;
+
+int imx8m_blk_ctrl_remove(struct platform_device *pdev);
+int imx8m_blk_ctrl_probe(struct platform_device *pdev);
+
+#endif
diff --git a/drivers/soc/imx/imx8mm-blk-ctrl.c b/drivers/soc/imx/imx8mm-blk-ctrl.c
new file mode 100644
index 000000000000..eb63d28b0157
--- /dev/null
+++ b/drivers/soc/imx/imx8mm-blk-ctrl.c
@@ -0,0 +1,173 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Copyright 2021 Pengutronix, Lucas Stach <kernel@...gutronix.de>
+ * Copyright 2022 NXP, Abel Vesa <abel.vesa@....com>
+ */
+
+#include <dt-bindings/power/imx8mm-power.h>
+
+#include "imx8m-blk-ctrl.h"
+
+static int imx8mm_vpu_power_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
+ power_nb);
+
+ if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
+ return NOTIFY_OK;
+
+ /*
+ * The ADB in the VPUMIX domain has no separate reset and clock
+ * enable bits, but is ungated together with the VPU clocks. To
+ * allow the handshake with the GPC to progress we put the VPUs
+ * in reset and ungate the clocks.
+ */
+ regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, BIT(0) | BIT(1) | BIT(2));
+ regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(0) | BIT(1) | BIT(2));
+
+ if (action == GENPD_NOTIFY_ON) {
+ /*
+ * On power up we have no software backchannel to the GPC to
+ * wait for the ADB handshake to happen, so we just delay for a
+ * bit. On power down the GPC driver waits for the handshake.
+ */
+ udelay(5);
+
+ /* set "fuse" bits to enable the VPUs */
+ regmap_set_bits(bc->regmap, 0x8, 0xffffffff);
+ regmap_set_bits(bc->regmap, 0xc, 0xffffffff);
+ regmap_set_bits(bc->regmap, 0x10, 0xffffffff);
+ regmap_set_bits(bc->regmap, 0x14, 0xffffffff);
+ }
+
+ return NOTIFY_OK;
+}
+
+static const struct imx8m_blk_ctrl_domain_data imx8mm_vpu_blk_ctl_domain_data[] = {
+ [IMX8MM_VPUBLK_PD_G1] = {
+ .name = "vpublk-g1",
+ .clk_names = (const char *[]){ "g1", },
+ .num_clks = 1,
+ .gpc_name = "g1",
+ .rst_mask = BIT(1),
+ .clk_mask = BIT(1),
+ },
+ [IMX8MM_VPUBLK_PD_G2] = {
+ .name = "vpublk-g2",
+ .clk_names = (const char *[]){ "g2", },
+ .num_clks = 1,
+ .gpc_name = "g2",
+ .rst_mask = BIT(0),
+ .clk_mask = BIT(0),
+ },
+ [IMX8MM_VPUBLK_PD_H1] = {
+ .name = "vpublk-h1",
+ .clk_names = (const char *[]){ "h1", },
+ .num_clks = 1,
+ .gpc_name = "h1",
+ .rst_mask = BIT(2),
+ .clk_mask = BIT(2),
+ },
+};
+
+static const struct imx8m_blk_ctrl_data imx8mm_vpu_blk_ctl_dev_data = {
+ .max_reg = 0x18,
+ .power_notifier_fn = imx8mm_vpu_power_notifier,
+ .domains = imx8mm_vpu_blk_ctl_domain_data,
+ .num_domains = ARRAY_SIZE(imx8mm_vpu_blk_ctl_domain_data),
+};
+
+static int imx8mm_disp_power_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
+ power_nb);
+
+ if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
+ return NOTIFY_OK;
+
+ /* Enable bus clock and deassert bus reset */
+ regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(12));
+ regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(6));
+
+ /*
+ * On power up we have no software backchannel to the GPC to
+ * wait for the ADB handshake to happen, so we just delay for a
+ * bit. On power down the GPC driver waits for the handshake.
+ */
+ if (action == GENPD_NOTIFY_ON)
+ udelay(5);
+
+
+ return NOTIFY_OK;
+}
+
+static const struct imx8m_blk_ctrl_domain_data imx8mm_disp_blk_ctl_domain_data[] = {
+ [IMX8MM_DISPBLK_PD_CSI_BRIDGE] = {
+ .name = "dispblk-csi-bridge",
+ .clk_names = (const char *[]){ "csi-bridge-axi", "csi-bridge-apb",
+ "csi-bridge-core", },
+ .num_clks = 3,
+ .gpc_name = "csi-bridge",
+ .rst_mask = BIT(0) | BIT(1) | BIT(2),
+ .clk_mask = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5),
+ },
+ [IMX8MM_DISPBLK_PD_LCDIF] = {
+ .name = "dispblk-lcdif",
+ .clk_names = (const char *[]){ "lcdif-axi", "lcdif-apb", "lcdif-pix", },
+ .num_clks = 3,
+ .gpc_name = "lcdif",
+ .clk_mask = BIT(6) | BIT(7),
+ },
+ [IMX8MM_DISPBLK_PD_MIPI_DSI] = {
+ .name = "dispblk-mipi-dsi",
+ .clk_names = (const char *[]){ "dsi-pclk", "dsi-ref", },
+ .num_clks = 2,
+ .gpc_name = "mipi-dsi",
+ .rst_mask = BIT(5),
+ .clk_mask = BIT(8) | BIT(9),
+ .mipi_phy_rst_mask = BIT(17),
+ },
+ [IMX8MM_DISPBLK_PD_MIPI_CSI] = {
+ .name = "dispblk-mipi-csi",
+ .clk_names = (const char *[]){ "csi-aclk", "csi-pclk" },
+ .num_clks = 2,
+ .gpc_name = "mipi-csi",
+ .rst_mask = BIT(3) | BIT(4),
+ .clk_mask = BIT(10) | BIT(11),
+ .mipi_phy_rst_mask = BIT(16),
+ },
+};
+
+static const struct imx8m_blk_ctrl_data imx8mm_disp_blk_ctl_dev_data = {
+ .max_reg = 0x2c,
+ .power_notifier_fn = imx8mm_disp_power_notifier,
+ .domains = imx8mm_disp_blk_ctl_domain_data,
+ .num_domains = ARRAY_SIZE(imx8mm_disp_blk_ctl_domain_data),
+};
+
+static const struct of_device_id imx8mm_blk_ctrl_of_match[] = {
+ {
+ .compatible = "fsl,imx8mm-vpu-blk-ctrl",
+ .data = &imx8mm_vpu_blk_ctl_dev_data
+ }, {
+ .compatible = "fsl,imx8mm-disp-blk-ctrl",
+ .data = &imx8mm_disp_blk_ctl_dev_data
+ }, {
+ /* Sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(of, imx8mm_blk_ctrl_of_match);
+
+static struct platform_driver imx8mm_blk_ctrl_driver = {
+ .probe = imx8m_blk_ctrl_probe,
+ .remove = imx8m_blk_ctrl_remove,
+ .driver = {
+ .name = "imx8mm-blk-ctrl",
+ .pm = &imx8m_blk_ctrl_pm_ops,
+ .of_match_table = imx8mm_blk_ctrl_of_match,
+ },
+};
+module_platform_driver(imx8mm_blk_ctrl_driver);
--
2.31.1
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