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Sun, 31 Jul 2022 23:05:36 -0400 (EDT) From: Samuel Holland To: Chen-Yu Tsai , Jernej Skrabec Cc: Samuel Holland , Arnd Bergmann , Hans de Goede , Icenowy Zheng , Krzysztof Kozlowski , Maxime Ripard , Rob Herring , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sunxi@lists.linux.dev Subject: [PATCH 8/9] soc: sunxi: sram: Export the LDO control register Date: Sun, 31 Jul 2022 22:05:08 -0500 Message-Id: <20220801030509.21966-9-samuel@sholland.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220801030509.21966-1-samuel@sholland.org> References: <20220801030509.21966-1-samuel@sholland.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220731_200539_554485_982BB23D X-CRM114-Status: GOOD ( 16.61 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Some newer Allwinner SoCs contain internal LDOs managed by a register in the system control MMIO space. Export this from the regmap in addtion to the EMAC register. Use generic names now that the regmap is no longer EMAC-specific. Signed-off-by: Samuel Holland --- drivers/soc/sunxi/sunxi_sram.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/drivers/soc/sunxi/sunxi_sram.c b/drivers/soc/sunxi/sunxi_sram.c index 7c6fb17cfe7f..7e8dab0f0ec4 100644 --- a/drivers/soc/sunxi/sunxi_sram.c +++ b/drivers/soc/sunxi/sunxi_sram.c @@ -283,6 +283,7 @@ EXPORT_SYMBOL(sunxi_sram_release); struct sunxi_sramc_variant { int num_emac_clocks; + bool has_ldo_ctrl; }; static const struct sunxi_sramc_variant sun4i_a10_sramc_variant = { @@ -302,25 +303,28 @@ static const struct sunxi_sramc_variant sun50i_h616_sramc_variant = { }; #define SUNXI_SRAM_EMAC_CLOCK_REG 0x30 +#define SUNXI_SYS_LDO_CTRL_REG 0x150 + static bool sunxi_sram_regmap_accessible_reg(struct device *dev, unsigned int reg) { const struct sunxi_sramc_variant *variant = dev_get_drvdata(dev); - if (reg < SUNXI_SRAM_EMAC_CLOCK_REG) - return false; - if (reg > SUNXI_SRAM_EMAC_CLOCK_REG + variant->num_emac_clocks * 4) - return false; + if (reg >= SUNXI_SRAM_EMAC_CLOCK_REG && + reg < SUNXI_SRAM_EMAC_CLOCK_REG + variant->num_emac_clocks * 4) + return true; + if (reg == SUNXI_SYS_LDO_CTRL_REG && variant->has_ldo_ctrl) + return true; - return true; + return false; } -static struct regmap_config sunxi_sram_emac_clock_regmap = { +static struct regmap_config sunxi_sram_regmap_config = { .reg_bits = 32, .val_bits = 32, .reg_stride = 4, /* last defined register */ - .max_register = SUNXI_SRAM_EMAC_CLOCK_REG + 4, + .max_register = SUNXI_SYS_LDO_CTRL_REG, /* other devices have no business accessing other registers */ .readable_reg = sunxi_sram_regmap_accessible_reg, .writeable_reg = sunxi_sram_regmap_accessible_reg, @@ -328,9 +332,9 @@ static struct regmap_config sunxi_sram_emac_clock_regmap = { static int __init sunxi_sram_probe(struct platform_device *pdev) { - struct regmap *emac_clock; const struct sunxi_sramc_variant *variant; struct device *dev = &pdev->dev; + struct regmap *regmap; sram_dev = &pdev->dev; @@ -344,12 +348,10 @@ static int __init sunxi_sram_probe(struct platform_device *pdev) if (IS_ERR(base)) return PTR_ERR(base); - if (variant->num_emac_clocks > 0) { - emac_clock = devm_regmap_init_mmio(&pdev->dev, base, - &sunxi_sram_emac_clock_regmap); - - if (IS_ERR(emac_clock)) - return PTR_ERR(emac_clock); + if (variant->num_emac_clocks || variant->has_ldo_ctrl) { + regmap = devm_regmap_init_mmio(dev, base, &sunxi_sram_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); } of_platform_populate(dev->of_node, NULL, NULL, dev); -- 2.35.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel