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SubjectRe: [PATCH v3 11/14] media: platform: Add Sunxi-Cedrus VPU decoder driver
On Mon, May 07, 2018 at 02:44:57PM +0200, Paul Kocialkowski wrote:
> +#define SYSCON_SRAM_CTRL_REG0 0x0
> +#define SYSCON_SRAM_C1_MAP_VE 0x7fffffff

This isn't needed anymore

> + dev->ahb_clk = devm_clk_get(dev->dev, "ahb");
> + if (IS_ERR(dev->ahb_clk)) {
> + dev_err(dev->dev, "failed to get ahb clock\n");
> + return PTR_ERR(dev->ahb_clk);
> + }
> + dev->mod_clk = devm_clk_get(dev->dev, "mod");
> + if (IS_ERR(dev->mod_clk)) {
> + dev_err(dev->dev, "failed to get mod clock\n");
> + return PTR_ERR(dev->mod_clk);
> + }
> + dev->ram_clk = devm_clk_get(dev->dev, "ram");
> + if (IS_ERR(dev->ram_clk)) {
> + dev_err(dev->dev, "failed to get ram clock\n");
> + return PTR_ERR(dev->ram_clk);
> + }

Please add some blank lines between those blocks

> + dev->rstc = devm_reset_control_get(dev->dev, NULL);

You're not checking the error code here

> + dev->syscon = syscon_regmap_lookup_by_phandle(dev->dev->of_node,
> + "syscon");
> + if (IS_ERR(dev->syscon)) {
> + dev->syscon = NULL;
> + } else {
> + regmap_write_bits(dev->syscon, SYSCON_SRAM_CTRL_REG0,
> + SYSCON_SRAM_C1_MAP_VE,
> + SYSCON_SRAM_C1_MAP_VE);
> + }

You don't need the syscon part anymore either

> + ret = clk_prepare_enable(dev->ahb_clk);
> + if (ret) {
> + dev_err(dev->dev, "could not enable ahb clock\n");
> + return -EFAULT;
> + }
> + ret = clk_prepare_enable(dev->mod_clk);
> + if (ret) {
> + clk_disable_unprepare(dev->ahb_clk);
> + dev_err(dev->dev, "could not enable mod clock\n");
> + return -EFAULT;
> + }
> + ret = clk_prepare_enable(dev->ram_clk);
> + if (ret) {
> + clk_disable_unprepare(dev->mod_clk);
> + clk_disable_unprepare(dev->ahb_clk);
> + dev_err(dev->dev, "could not enable ram clock\n");
> + return -EFAULT;
> + }
> +
> + ret = reset_control_reset(dev->rstc);
> + if (ret) {
> + clk_disable_unprepare(dev->ram_clk);
> + clk_disable_unprepare(dev->mod_clk);
> + clk_disable_unprepare(dev->ahb_clk);
> + dev_err(dev->dev, "could not reset device\n");
> + return -EFAULT;

labels would simplify this greatly, and you should also release the
sram and the memory region here.

Maxime

--
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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