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Subject[PATCH v2] soc: amlogic: meson-gx-pwrc-vpu: Add support for G12A
Date
The Amlogic G12A SoC has a very similar VPU Power Controller setup
than the older GXBB, GXL & GXm SoCs.

This patch adds the variant support for G12A.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
Changes since v1:
- Move the GX mask fix to a separate patch

Dependencies:
- Depends on [1], but is reviewed, linux-amlogic maintainer can pick it in the same time as this patch

[1] https://patchwork.kernel.org/patch/10851177/

drivers/soc/amlogic/meson-gx-pwrc-vpu.c | 152 ++++++++++++++++++++++--
1 file changed, 140 insertions(+), 12 deletions(-)

diff --git a/drivers/soc/amlogic/meson-gx-pwrc-vpu.c b/drivers/soc/amlogic/meson-gx-pwrc-vpu.c
index 05421d029dff..511b6856225d 100644
--- a/drivers/soc/amlogic/meson-gx-pwrc-vpu.c
+++ b/drivers/soc/amlogic/meson-gx-pwrc-vpu.c
@@ -11,6 +11,7 @@
#include <linux/bitfield.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
+#include <linux/of_device.h>
#include <linux/reset.h>
#include <linux/clk.h>

@@ -26,6 +27,7 @@
#define HHI_MEM_PD_REG0 (0x40 << 2)
#define HHI_VPU_MEM_PD_REG0 (0x41 << 2)
#define HHI_VPU_MEM_PD_REG1 (0x42 << 2)
+#define HHI_VPU_MEM_PD_REG2 (0x4d << 2)

struct meson_gx_pwrc_vpu {
struct generic_pm_domain genpd;
@@ -80,6 +82,49 @@ static int meson_gx_pwrc_vpu_power_off(struct generic_pm_domain *genpd)
return 0;
}

+static int meson_g12a_pwrc_vpu_power_off(struct generic_pm_domain *genpd)
+{
+ struct meson_gx_pwrc_vpu *pd = genpd_to_pd(genpd);
+ int i;
+
+ regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+ GEN_PWR_VPU_HDMI_ISO, GEN_PWR_VPU_HDMI_ISO);
+ udelay(20);
+
+ /* Power Down Memories */
+ for (i = 0; i < 32; i += 2) {
+ regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG0,
+ 0x3 << i, 0x3 << i);
+ udelay(5);
+ }
+ for (i = 0; i < 32; i += 2) {
+ regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG1,
+ 0x3 << i, 0x3 << i);
+ udelay(5);
+ }
+ for (i = 0; i < 32; i += 2) {
+ regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG2,
+ 0x3 << i, 0x3 << i);
+ udelay(5);
+ }
+ for (i = 8; i < 16; i++) {
+ regmap_update_bits(pd->regmap_hhi, HHI_MEM_PD_REG0,
+ BIT(i), BIT(i));
+ udelay(5);
+ }
+ udelay(20);
+
+ regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+ GEN_PWR_VPU_HDMI, GEN_PWR_VPU_HDMI);
+
+ msleep(20);
+
+ clk_disable_unprepare(pd->vpu_clk);
+ clk_disable_unprepare(pd->vapb_clk);
+
+ return 0;
+}
+
static int meson_gx_pwrc_vpu_setup_clk(struct meson_gx_pwrc_vpu *pd)
{
int ret;
@@ -143,6 +188,60 @@ static int meson_gx_pwrc_vpu_power_on(struct generic_pm_domain *genpd)
return 0;
}

+static int meson_g12a_pwrc_vpu_power_on(struct generic_pm_domain *genpd)
+{
+ struct meson_gx_pwrc_vpu *pd = genpd_to_pd(genpd);
+ int ret;
+ int i;
+
+ regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+ GEN_PWR_VPU_HDMI, 0);
+ udelay(20);
+
+ /* Power Up Memories */
+ for (i = 0; i < 32; i += 2) {
+ regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG0,
+ 0x3 << i, 0);
+ udelay(5);
+ }
+
+ for (i = 0; i < 32; i += 2) {
+ regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG1,
+ 0x3 << i, 0);
+ udelay(5);
+ }
+
+ for (i = 0; i < 32; i += 2) {
+ regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG2,
+ 0x3 << i, 0);
+ udelay(5);
+ }
+
+ for (i = 8; i < 16; i++) {
+ regmap_update_bits(pd->regmap_hhi, HHI_MEM_PD_REG0,
+ BIT(i), 0);
+ udelay(5);
+ }
+ udelay(20);
+
+ ret = reset_control_assert(pd->rstc);
+ if (ret)
+ return ret;
+
+ regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+ GEN_PWR_VPU_HDMI_ISO, 0);
+
+ ret = reset_control_deassert(pd->rstc);
+ if (ret)
+ return ret;
+
+ ret = meson_gx_pwrc_vpu_setup_clk(pd);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
static bool meson_gx_pwrc_vpu_get_power(struct meson_gx_pwrc_vpu *pd)
{
u32 reg;
@@ -160,15 +259,37 @@ static struct meson_gx_pwrc_vpu vpu_hdmi_pd = {
},
};

+static struct meson_gx_pwrc_vpu vpu_hdmi_pd_g12a = {
+ .genpd = {
+ .name = "vpu_hdmi",
+ .power_off = meson_g12a_pwrc_vpu_power_off,
+ .power_on = meson_g12a_pwrc_vpu_power_on,
+ },
+};
+
static int meson_gx_pwrc_vpu_probe(struct platform_device *pdev)
{
+ const struct meson_gx_pwrc_vpu *vpu_pd_match;
struct regmap *regmap_ao, *regmap_hhi;
+ struct meson_gx_pwrc_vpu *vpu_pd;
struct reset_control *rstc;
struct clk *vpu_clk;
struct clk *vapb_clk;
bool powered_off;
int ret;

+ vpu_pd_match = of_device_get_match_data(&pdev->dev);
+ if (!vpu_pd_match) {
+ dev_err(&pdev->dev, "failed to get match data\n");
+ return -ENODEV;
+ }
+
+ vpu_pd = devm_kzalloc(&pdev->dev, sizeof(*vpu_pd), GFP_KERNEL);
+ if (!vpu_pd)
+ return -ENOMEM;
+
+ memcpy(vpu_pd, vpu_pd_match, sizeof(*vpu_pd));
+
regmap_ao = syscon_node_to_regmap(of_get_parent(pdev->dev.of_node));
if (IS_ERR(regmap_ao)) {
dev_err(&pdev->dev, "failed to get regmap\n");
@@ -201,39 +322,46 @@ static int meson_gx_pwrc_vpu_probe(struct platform_device *pdev)
return PTR_ERR(vapb_clk);
}

- vpu_hdmi_pd.regmap_ao = regmap_ao;
- vpu_hdmi_pd.regmap_hhi = regmap_hhi;
- vpu_hdmi_pd.rstc = rstc;
- vpu_hdmi_pd.vpu_clk = vpu_clk;
- vpu_hdmi_pd.vapb_clk = vapb_clk;
+ vpu_pd->regmap_ao = regmap_ao;
+ vpu_pd->regmap_hhi = regmap_hhi;
+ vpu_pd->rstc = rstc;
+ vpu_pd->vpu_clk = vpu_clk;
+ vpu_pd->vapb_clk = vapb_clk;
+
+ platform_set_drvdata(pdev, vpu_pd);

- powered_off = meson_gx_pwrc_vpu_get_power(&vpu_hdmi_pd);
+ powered_off = meson_gx_pwrc_vpu_get_power(vpu_pd);

/* If already powered, sync the clock states */
if (!powered_off) {
- ret = meson_gx_pwrc_vpu_setup_clk(&vpu_hdmi_pd);
+ ret = meson_gx_pwrc_vpu_setup_clk(vpu_pd);
if (ret)
return ret;
}

- pm_genpd_init(&vpu_hdmi_pd.genpd, &pm_domain_always_on_gov,
+ pm_genpd_init(&vpu_pd->genpd, &pm_domain_always_on_gov,
powered_off);

return of_genpd_add_provider_simple(pdev->dev.of_node,
- &vpu_hdmi_pd.genpd);
+ &vpu_pd->genpd);
}

static void meson_gx_pwrc_vpu_shutdown(struct platform_device *pdev)
{
+ struct meson_gx_pwrc_vpu *vpu_pd = platform_get_drvdata(pdev);
bool powered_off;

- powered_off = meson_gx_pwrc_vpu_get_power(&vpu_hdmi_pd);
+ powered_off = meson_gx_pwrc_vpu_get_power(vpu_pd);
if (!powered_off)
- meson_gx_pwrc_vpu_power_off(&vpu_hdmi_pd.genpd);
+ vpu_pd->genpd.power_off(&vpu_pd->genpd);
}

static const struct of_device_id meson_gx_pwrc_vpu_match_table[] = {
- { .compatible = "amlogic,meson-gx-pwrc-vpu" },
+ { .compatible = "amlogic,meson-gx-pwrc-vpu", .data = &vpu_hdmi_pd },
+ {
+ .compatible = "amlogic,meson-g12a-pwrc-vpu",
+ .data = &vpu_hdmi_pd_g12a
+ },
{ /* sentinel */ }
};

--
2.21.0
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