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Message-Id: <1490177935-9646-3-git-send-email-narmstrong@baylibre.com>
Date: Wed, 22 Mar 2017 11:18:54 +0100
From: Neil Armstrong <narmstrong@...libre.com>
To: sboyd@...eaurora.org, khilman@...libre.com, carlo@...one.org
Cc: Neil Armstrong <narmstrong@...libre.com>,
linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 2/3] clk: meson-gxbb: Add MALI clocks
The Mali is clocked by two identical clock paths behind a glitch free mux
to safely change frequency while running.
The two "mali_0" and "mali_1" clocks are composed of a mux, divider and gate.
Expose these two clocks trees using generic clocks.
Finally the glitch free mux is added as "mali" clock.
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
drivers/clk/meson/gxbb.c | 139 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 139 insertions(+)
diff --git a/drivers/clk/meson/gxbb.c b/drivers/clk/meson/gxbb.c
index 5059c7b..d07dc22 100644
--- a/drivers/clk/meson/gxbb.c
+++ b/drivers/clk/meson/gxbb.c
@@ -634,6 +634,131 @@
},
};
+/*
+ * The MALI IP is clocked by two identical clocks (mali_0 and mali_1)
+ * muxed by a glitch-free switch.
+ */
+
+static u32 mux_table_mali_0_1[] = {0, 1, 2, 3, 4, 5, 6, 7};
+static const char *gxbb_mali_0_1_parent_names[] = {
+ "xtal", "gp0_pll", "mpll2", "mpll1", "fclk_div7",
+ "fclk_div4", "fclk_div3", "fclk_div5"
+};
+
+static struct clk_mux gxbb_mali_0_sel = {
+ .reg = (void *)HHI_MALI_CLK_CNTL,
+ .mask = 0x7,
+ .shift = 9,
+ .table = mux_table_mali_0_1,
+ .lock = &clk_lock,
+ .hw.init = &(struct clk_init_data){
+ .name = "mali_0_sel",
+ .ops = &clk_mux_ops,
+ /*
+ * bits 10:9 selects from 8 possible parents:
+ * xtal, gp0_pll, mpll2, mpll1, fclk_div7,
+ * fclk_div4, fclk_div3, fclk_div5
+ */
+ .parent_names = gxbb_mali_0_1_parent_names,
+ .num_parents = 8,
+ .flags = CLK_SET_RATE_NO_REPARENT,
+ },
+};
+
+static struct clk_divider gxbb_mali_0_div = {
+ .reg = (void *)HHI_MALI_CLK_CNTL,
+ .shift = 0,
+ .width = 7,
+ .lock = &clk_lock,
+ .hw.init = &(struct clk_init_data){
+ .name = "mali_0_div",
+ .ops = &clk_divider_ops,
+ .parent_names = (const char *[]){ "mali_0_sel" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_NO_REPARENT,
+ },
+};
+
+static struct clk_gate gxbb_mali_0 = {
+ .reg = (void *)HHI_MALI_CLK_CNTL,
+ .bit_idx = 8,
+ .lock = &clk_lock,
+ .hw.init = &(struct clk_init_data){
+ .name = "mali_0",
+ .ops = &clk_gate_ops,
+ .parent_names = (const char *[]){ "mali_0_div" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_mux gxbb_mali_1_sel = {
+ .reg = (void *)HHI_MALI_CLK_CNTL,
+ .mask = 0x7,
+ .shift = 25,
+ .table = mux_table_mali_0_1,
+ .lock = &clk_lock,
+ .hw.init = &(struct clk_init_data){
+ .name = "mali_1_sel",
+ .ops = &clk_mux_ops,
+ /*
+ * bits 10:9 selects from 8 possible parents:
+ * xtal, gp0_pll, mpll2, mpll1, fclk_div7,
+ * fclk_div4, fclk_div3, fclk_div5
+ */
+ .parent_names = gxbb_mali_0_1_parent_names,
+ .num_parents = 8,
+ .flags = CLK_SET_RATE_NO_REPARENT,
+ },
+};
+
+static struct clk_divider gxbb_mali_1_div = {
+ .reg = (void *)HHI_MALI_CLK_CNTL,
+ .shift = 16,
+ .width = 7,
+ .lock = &clk_lock,
+ .hw.init = &(struct clk_init_data){
+ .name = "mali_1_div",
+ .ops = &clk_divider_ops,
+ .parent_names = (const char *[]){ "mali_1_sel" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_NO_REPARENT,
+ },
+};
+
+static struct clk_gate gxbb_mali_1 = {
+ .reg = (void *)HHI_MALI_CLK_CNTL,
+ .bit_idx = 24,
+ .lock = &clk_lock,
+ .hw.init = &(struct clk_init_data){
+ .name = "mali_1",
+ .ops = &clk_gate_ops,
+ .parent_names = (const char *[]){ "mali_1_div" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static u32 mux_table_mali[] = {0, 1};
+static const char *gxbb_mali_parent_names[] = {
+ "mali_0", "mali_1"
+};
+
+static struct clk_mux gxbb_mali = {
+ .reg = (void *)HHI_MALI_CLK_CNTL,
+ .mask = 1,
+ .shift = 31,
+ .table = mux_table_mali,
+ .lock = &clk_lock,
+ .hw.init = &(struct clk_init_data){
+ .name = "mali",
+ .ops = &clk_mux_ops,
+ .parent_names = gxbb_mali_parent_names,
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_NO_REPARENT,
+ },
+};
+
/* Everything Else (EE) domain gates */
static MESON_GATE(gxbb_ddr, HHI_GCLK_MPEG0, 0);
static MESON_GATE(gxbb_dos, HHI_GCLK_MPEG0, 1);
@@ -827,6 +952,13 @@
[CLKID_SAR_ADC_CLK] = &gxbb_sar_adc_clk.hw,
[CLKID_SAR_ADC_SEL] = &gxbb_sar_adc_clk_sel.hw,
[CLKID_SAR_ADC_DIV] = &gxbb_sar_adc_clk_div.hw,
+ [CLKID_MALI_0_SEL] = &gxbb_mali_0_sel.hw,
+ [CLKID_MALI_0_DIV] = &gxbb_mali_0_div.hw,
+ [CLKID_MALI_0] = &gxbb_mali_0.hw,
+ [CLKID_MALI_1_SEL] = &gxbb_mali_1_sel.hw,
+ [CLKID_MALI_1_DIV] = &gxbb_mali_1_div.hw,
+ [CLKID_MALI_1] = &gxbb_mali_1.hw,
+ [CLKID_MALI] = &gxbb_mali.hw,
},
.num = NR_CLKS,
};
@@ -930,16 +1062,23 @@
&gxbb_emmc_b,
&gxbb_emmc_c,
&gxbb_sar_adc_clk,
+ &gxbb_mali_0,
+ &gxbb_mali_1,
};
static struct clk_mux *const gxbb_clk_muxes[] = {
&gxbb_mpeg_clk_sel,
&gxbb_sar_adc_clk_sel,
+ &gxbb_mali_0_sel,
+ &gxbb_mali_1_sel,
+ &gxbb_mali,
};
static struct clk_divider *const gxbb_clk_dividers[] = {
&gxbb_mpeg_clk_div,
&gxbb_sar_adc_clk_div,
+ &gxbb_mali_0_div,
+ &gxbb_mali_1_div,
};
static int gxbb_clkc_probe(struct platform_device *pdev)
--
1.9.1
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