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Message-ID: <20190328132721.GA32178@bogus>
Date: Thu, 28 Mar 2019 08:27:21 -0500
From: Rob Herring <robh@...nel.org>
To: Icenowy Zheng <icenowy@...c.io>
Cc: Maxime Ripard <maxime.ripard@...tlin.com>,
Chen-Yu Tsai <wens@...e.org>,
Linus Walleij <linus.walleij@...aro.org>,
Jagan Teki <jagan@...rulasolutions.com>,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
linux-gpio@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH 08/14] clk: sunxi-ng: v3s: add Allwinner V3 support
On Tue, Mar 12, 2019 at 11:22:50PM +0800, Icenowy Zheng wrote:
> Allwinner V3 has the same main die with V3s, but with more pins wired.
> There's a I2S bus on V3 that is not available on V3s.
>
> Add the V3-only peripheral's clocks and reset to the V3s CCU driver,
> bound to a new V3 compatible string. The driver name is not changed
> because it's part of the device tree binding (the header file name).
>
> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
> ---
> drivers/clk/sunxi-ng/ccu-sun8i-v3s.c | 225 +++++++++++++++++++++-
> drivers/clk/sunxi-ng/ccu-sun8i-v3s.h | 2 +-
> include/dt-bindings/clock/sun8i-v3s-ccu.h | 4 +
> include/dt-bindings/reset/sun8i-v3s-ccu.h | 3 +
> 4 files changed, 231 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-v3s.c b/drivers/clk/sunxi-ng/ccu-sun8i-v3s.c
> index cbba04f5f761..81450ea8faa2 100644
> --- a/drivers/clk/sunxi-ng/ccu-sun8i-v3s.c
> +++ b/drivers/clk/sunxi-ng/ccu-sun8i-v3s.c
> @@ -242,6 +242,8 @@ static SUNXI_CCU_GATE(bus_codec_clk, "bus-codec", "apb1",
> 0x068, BIT(0), 0);
> static SUNXI_CCU_GATE(bus_pio_clk, "bus-pio", "apb1",
> 0x068, BIT(5), 0);
> +static SUNXI_CCU_GATE(bus_i2s0_clk, "bus-i2s0", "apb1",
> + 0x068, BIT(12), 0);
>
> static SUNXI_CCU_GATE(bus_i2c0_clk, "bus-i2c0", "apb2",
> 0x06c, BIT(0), 0);
> @@ -313,6 +315,11 @@ static SUNXI_CCU_MP_WITH_MUX_GATE(spi0_clk, "spi0", mod0_default_parents, 0x0a0,
> BIT(31), /* gate */
> 0);
>
> +static const char * const i2s_parents[] = { "pll-audio-8x", "pll-audio-4x",
> + "pll-audio-2x", "pll-audio" };
> +static SUNXI_CCU_MUX_WITH_GATE(i2s0_clk, "i2s0", i2s_parents,
> + 0x0b0, 16, 2, BIT(31), CLK_SET_RATE_PARENT);
> +
> static SUNXI_CCU_GATE(usb_phy0_clk, "usb-phy0", "osc24M",
> 0x0cc, BIT(8), 0);
> static SUNXI_CCU_GATE(usb_ohci0_clk, "usb-ohci0", "osc24M",
> @@ -445,6 +452,80 @@ static struct ccu_common *sun8i_v3s_ccu_clks[] = {
> &mipi_csi_clk.common,
> };
>
> +static struct ccu_common *sun8i_v3_ccu_clks[] = {
Seems like a bunch of duplication for just 2 differences in clocks.
Can't you keep the definitions the same and just skip registering the
clocks not present?
> + &pll_cpu_clk.common,
> + &pll_audio_base_clk.common,
> + &pll_video_clk.common,
> + &pll_ve_clk.common,
> + &pll_ddr0_clk.common,
> + &pll_periph0_clk.common,
> + &pll_isp_clk.common,
> + &pll_periph1_clk.common,
> + &pll_ddr1_clk.common,
> + &cpu_clk.common,
> + &axi_clk.common,
> + &ahb1_clk.common,
> + &apb1_clk.common,
> + &apb2_clk.common,
> + &ahb2_clk.common,
> + &bus_ce_clk.common,
> + &bus_dma_clk.common,
> + &bus_mmc0_clk.common,
> + &bus_mmc1_clk.common,
> + &bus_mmc2_clk.common,
> + &bus_dram_clk.common,
> + &bus_emac_clk.common,
> + &bus_hstimer_clk.common,
> + &bus_spi0_clk.common,
> + &bus_otg_clk.common,
> + &bus_ehci0_clk.common,
> + &bus_ohci0_clk.common,
> + &bus_ve_clk.common,
> + &bus_tcon0_clk.common,
> + &bus_csi_clk.common,
> + &bus_de_clk.common,
> + &bus_codec_clk.common,
> + &bus_pio_clk.common,
> + &bus_i2s0_clk.common,
> + &bus_i2c0_clk.common,
> + &bus_i2c1_clk.common,
> + &bus_uart0_clk.common,
> + &bus_uart1_clk.common,
> + &bus_uart2_clk.common,
> + &bus_ephy_clk.common,
> + &bus_dbg_clk.common,
> + &mmc0_clk.common,
> + &mmc0_sample_clk.common,
> + &mmc0_output_clk.common,
> + &mmc1_clk.common,
> + &mmc1_sample_clk.common,
> + &mmc1_output_clk.common,
> + &mmc2_clk.common,
> + &mmc2_sample_clk.common,
> + &mmc2_output_clk.common,
> + &ce_clk.common,
> + &spi0_clk.common,
> + &i2s0_clk.common,
> + &usb_phy0_clk.common,
> + &usb_ohci0_clk.common,
> + &dram_clk.common,
> + &dram_ve_clk.common,
> + &dram_csi_clk.common,
> + &dram_ohci_clk.common,
> + &dram_ehci_clk.common,
> + &de_clk.common,
> + &tcon_clk.common,
> + &csi_misc_clk.common,
> + &csi0_mclk_clk.common,
> + &csi1_sclk_clk.common,
> + &csi1_mclk_clk.common,
> + &ve_clk.common,
> + &ac_dig_clk.common,
> + &avs_clk.common,
> + &mbus_clk.common,
> + &mipi_csi_clk.common,
> +};
> +
> /* We hardcode the divider to 4 for now */
> static CLK_FIXED_FACTOR(pll_audio_clk, "pll-audio",
> "pll-audio-base", 4, 1, CLK_SET_RATE_PARENT);
> @@ -534,6 +615,85 @@ static struct clk_hw_onecell_data sun8i_v3s_hw_clks = {
> .num = CLK_NUMBER,
> };
>
> +static struct clk_hw_onecell_data sun8i_v3_hw_clks = {
> + .hws = {
> + [CLK_PLL_CPU] = &pll_cpu_clk.common.hw,
> + [CLK_PLL_AUDIO_BASE] = &pll_audio_base_clk.common.hw,
> + [CLK_PLL_AUDIO] = &pll_audio_clk.hw,
> + [CLK_PLL_AUDIO_2X] = &pll_audio_2x_clk.hw,
> + [CLK_PLL_AUDIO_4X] = &pll_audio_4x_clk.hw,
> + [CLK_PLL_AUDIO_8X] = &pll_audio_8x_clk.hw,
> + [CLK_PLL_VIDEO] = &pll_video_clk.common.hw,
> + [CLK_PLL_VE] = &pll_ve_clk.common.hw,
> + [CLK_PLL_DDR0] = &pll_ddr0_clk.common.hw,
> + [CLK_PLL_PERIPH0] = &pll_periph0_clk.common.hw,
> + [CLK_PLL_PERIPH0_2X] = &pll_periph0_2x_clk.hw,
> + [CLK_PLL_ISP] = &pll_isp_clk.common.hw,
> + [CLK_PLL_PERIPH1] = &pll_periph1_clk.common.hw,
> + [CLK_PLL_DDR1] = &pll_ddr1_clk.common.hw,
> + [CLK_CPU] = &cpu_clk.common.hw,
> + [CLK_AXI] = &axi_clk.common.hw,
> + [CLK_AHB1] = &ahb1_clk.common.hw,
> + [CLK_APB1] = &apb1_clk.common.hw,
> + [CLK_APB2] = &apb2_clk.common.hw,
> + [CLK_AHB2] = &ahb2_clk.common.hw,
> + [CLK_BUS_CE] = &bus_ce_clk.common.hw,
> + [CLK_BUS_DMA] = &bus_dma_clk.common.hw,
> + [CLK_BUS_MMC0] = &bus_mmc0_clk.common.hw,
> + [CLK_BUS_MMC1] = &bus_mmc1_clk.common.hw,
> + [CLK_BUS_MMC2] = &bus_mmc2_clk.common.hw,
> + [CLK_BUS_DRAM] = &bus_dram_clk.common.hw,
> + [CLK_BUS_EMAC] = &bus_emac_clk.common.hw,
> + [CLK_BUS_HSTIMER] = &bus_hstimer_clk.common.hw,
> + [CLK_BUS_SPI0] = &bus_spi0_clk.common.hw,
> + [CLK_BUS_OTG] = &bus_otg_clk.common.hw,
> + [CLK_BUS_EHCI0] = &bus_ehci0_clk.common.hw,
> + [CLK_BUS_OHCI0] = &bus_ohci0_clk.common.hw,
> + [CLK_BUS_VE] = &bus_ve_clk.common.hw,
> + [CLK_BUS_TCON0] = &bus_tcon0_clk.common.hw,
> + [CLK_BUS_CSI] = &bus_csi_clk.common.hw,
> + [CLK_BUS_DE] = &bus_de_clk.common.hw,
> + [CLK_BUS_CODEC] = &bus_codec_clk.common.hw,
> + [CLK_BUS_PIO] = &bus_pio_clk.common.hw,
> + [CLK_BUS_I2S0] = &bus_i2s0_clk.common.hw,
> + [CLK_BUS_I2C0] = &bus_i2c0_clk.common.hw,
> + [CLK_BUS_I2C1] = &bus_i2c1_clk.common.hw,
> + [CLK_BUS_UART0] = &bus_uart0_clk.common.hw,
> + [CLK_BUS_UART1] = &bus_uart1_clk.common.hw,
> + [CLK_BUS_UART2] = &bus_uart2_clk.common.hw,
> + [CLK_BUS_EPHY] = &bus_ephy_clk.common.hw,
> + [CLK_BUS_DBG] = &bus_dbg_clk.common.hw,
> + [CLK_MMC0] = &mmc0_clk.common.hw,
> + [CLK_MMC0_SAMPLE] = &mmc0_sample_clk.common.hw,
> + [CLK_MMC0_OUTPUT] = &mmc0_output_clk.common.hw,
> + [CLK_MMC1] = &mmc1_clk.common.hw,
> + [CLK_MMC1_SAMPLE] = &mmc1_sample_clk.common.hw,
> + [CLK_MMC1_OUTPUT] = &mmc1_output_clk.common.hw,
> + [CLK_CE] = &ce_clk.common.hw,
> + [CLK_SPI0] = &spi0_clk.common.hw,
> + [CLK_I2S0] = &i2s0_clk.common.hw,
> + [CLK_USB_PHY0] = &usb_phy0_clk.common.hw,
> + [CLK_USB_OHCI0] = &usb_ohci0_clk.common.hw,
> + [CLK_DRAM] = &dram_clk.common.hw,
> + [CLK_DRAM_VE] = &dram_ve_clk.common.hw,
> + [CLK_DRAM_CSI] = &dram_csi_clk.common.hw,
> + [CLK_DRAM_EHCI] = &dram_ehci_clk.common.hw,
> + [CLK_DRAM_OHCI] = &dram_ohci_clk.common.hw,
> + [CLK_DE] = &de_clk.common.hw,
> + [CLK_TCON0] = &tcon_clk.common.hw,
> + [CLK_CSI_MISC] = &csi_misc_clk.common.hw,
> + [CLK_CSI0_MCLK] = &csi0_mclk_clk.common.hw,
> + [CLK_CSI1_SCLK] = &csi1_sclk_clk.common.hw,
> + [CLK_CSI1_MCLK] = &csi1_mclk_clk.common.hw,
> + [CLK_VE] = &ve_clk.common.hw,
> + [CLK_AC_DIG] = &ac_dig_clk.common.hw,
> + [CLK_AVS] = &avs_clk.common.hw,
> + [CLK_MBUS] = &mbus_clk.common.hw,
> + [CLK_MIPI_CSI] = &mipi_csi_clk.common.hw,
> + },
> + .num = CLK_NUMBER,
> +};
> +
> static struct ccu_reset_map sun8i_v3s_ccu_resets[] = {
> [RST_USB_PHY0] = { 0x0cc, BIT(0) },
>
> @@ -569,6 +729,42 @@ static struct ccu_reset_map sun8i_v3s_ccu_resets[] = {
> [RST_BUS_UART2] = { 0x2d8, BIT(18) },
> };
>
> +static struct ccu_reset_map sun8i_v3_ccu_resets[] = {
> + [RST_USB_PHY0] = { 0x0cc, BIT(0) },
> +
> + [RST_MBUS] = { 0x0fc, BIT(31) },
> +
> + [RST_BUS_CE] = { 0x2c0, BIT(5) },
> + [RST_BUS_DMA] = { 0x2c0, BIT(6) },
> + [RST_BUS_MMC0] = { 0x2c0, BIT(8) },
> + [RST_BUS_MMC1] = { 0x2c0, BIT(9) },
> + [RST_BUS_MMC2] = { 0x2c0, BIT(10) },
> + [RST_BUS_DRAM] = { 0x2c0, BIT(14) },
> + [RST_BUS_EMAC] = { 0x2c0, BIT(17) },
> + [RST_BUS_HSTIMER] = { 0x2c0, BIT(19) },
> + [RST_BUS_SPI0] = { 0x2c0, BIT(20) },
> + [RST_BUS_OTG] = { 0x2c0, BIT(24) },
> + [RST_BUS_EHCI0] = { 0x2c0, BIT(26) },
> + [RST_BUS_OHCI0] = { 0x2c0, BIT(29) },
> +
> + [RST_BUS_VE] = { 0x2c4, BIT(0) },
> + [RST_BUS_TCON0] = { 0x2c4, BIT(4) },
> + [RST_BUS_CSI] = { 0x2c4, BIT(8) },
> + [RST_BUS_DE] = { 0x2c4, BIT(12) },
> + [RST_BUS_DBG] = { 0x2c4, BIT(31) },
> +
> + [RST_BUS_EPHY] = { 0x2c8, BIT(2) },
> +
> + [RST_BUS_CODEC] = { 0x2d0, BIT(0) },
> + [RST_BUS_I2S0] = { 0x2d0, BIT(12) },
> +
> + [RST_BUS_I2C0] = { 0x2d8, BIT(0) },
> + [RST_BUS_I2C1] = { 0x2d8, BIT(1) },
> + [RST_BUS_UART0] = { 0x2d8, BIT(16) },
> + [RST_BUS_UART1] = { 0x2d8, BIT(17) },
> + [RST_BUS_UART2] = { 0x2d8, BIT(18) },
> +};
> +
> static const struct sunxi_ccu_desc sun8i_v3s_ccu_desc = {
> .ccu_clks = sun8i_v3s_ccu_clks,
> .num_ccu_clks = ARRAY_SIZE(sun8i_v3s_ccu_clks),
> @@ -579,7 +775,18 @@ static const struct sunxi_ccu_desc sun8i_v3s_ccu_desc = {
> .num_resets = ARRAY_SIZE(sun8i_v3s_ccu_resets),
> };
>
> -static void __init sun8i_v3s_ccu_setup(struct device_node *node)
> +static const struct sunxi_ccu_desc sun8i_v3_ccu_desc = {
> + .ccu_clks = sun8i_v3_ccu_clks,
> + .num_ccu_clks = ARRAY_SIZE(sun8i_v3_ccu_clks),
> +
> + .hw_clks = &sun8i_v3_hw_clks,
> +
> + .resets = sun8i_v3_ccu_resets,
> + .num_resets = ARRAY_SIZE(sun8i_v3_ccu_resets),
> +};
> +
> +static void __init sun8i_v3_v3s_ccu_init(struct device_node *node,
> + const struct sunxi_ccu_desc *ccu_desc)
> {
> void __iomem *reg;
> u32 val;
> @@ -595,7 +802,21 @@ static void __init sun8i_v3s_ccu_setup(struct device_node *node)
> val &= ~GENMASK(19, 16);
> writel(val | (3 << 16), reg + SUN8I_V3S_PLL_AUDIO_REG);
>
> - sunxi_ccu_probe(node, reg, &sun8i_v3s_ccu_desc);
> + sunxi_ccu_probe(node, reg, ccu_desc);
> +}
> +
> +static void __init sun8i_v3s_ccu_setup(struct device_node *node)
> +{
> + sun8i_v3_v3s_ccu_init(node, &sun8i_v3s_ccu_desc);
> +}
> +
> +static void __init sun8i_v3_ccu_setup(struct device_node *node)
> +{
> + sun8i_v3_v3s_ccu_init(node, &sun8i_v3_ccu_desc);
> }
> +
> CLK_OF_DECLARE(sun8i_v3s_ccu, "allwinner,sun8i-v3s-ccu",
> sun8i_v3s_ccu_setup);
> +
> +CLK_OF_DECLARE(sun8i_v3_ccu, "allwinner,sun8i-v3-ccu",
> + sun8i_v3_ccu_setup);
> diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-v3s.h b/drivers/clk/sunxi-ng/ccu-sun8i-v3s.h
> index a091b7217dfd..578485d85cd2 100644
> --- a/drivers/clk/sunxi-ng/ccu-sun8i-v3s.h
> +++ b/drivers/clk/sunxi-ng/ccu-sun8i-v3s.h
> @@ -60,6 +60,6 @@
>
> #define CLK_PLL_DDR1 74
>
> -#define CLK_NUMBER (CLK_PLL_DDR1 + 1)
> +#define CLK_NUMBER (CLK_I2S0 + 1)
>
> #endif /* _CCU_SUN8I_H3_H_ */
> diff --git a/include/dt-bindings/clock/sun8i-v3s-ccu.h b/include/dt-bindings/clock/sun8i-v3s-ccu.h
> index c0d5d5599c87..014ac6123d17 100644
> --- a/include/dt-bindings/clock/sun8i-v3s-ccu.h
> +++ b/include/dt-bindings/clock/sun8i-v3s-ccu.h
> @@ -104,4 +104,8 @@
>
> #define CLK_MIPI_CSI 73
>
> +/* Clocks not available on V3s */
Perhaps reword as 'Clocks only on V3'
> +#define CLK_BUS_I2S0 75
> +#define CLK_I2S0 76
> +
> #endif /* _DT_BINDINGS_CLK_SUN8I_V3S_H_ */
> diff --git a/include/dt-bindings/reset/sun8i-v3s-ccu.h b/include/dt-bindings/reset/sun8i-v3s-ccu.h
> index b58ef21a2e18..b6790173afd6 100644
> --- a/include/dt-bindings/reset/sun8i-v3s-ccu.h
> +++ b/include/dt-bindings/reset/sun8i-v3s-ccu.h
> @@ -75,4 +75,7 @@
> #define RST_BUS_UART1 50
> #define RST_BUS_UART2 51
>
> +/* Reset lines not available on V3s */
> +#define RST_BUS_I2S0 52
> +
> #endif /* _DT_BINDINGS_RST_SUN8I_H3_H_ */
> --
> 2.18.1
>
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